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Patent US4880852 - Polyethylene or polypropylene, zinc oxide blend - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA deodorizing resin composition is composed of 99.9-50 parts by weight of a thermoplastic resin and 0.1-50 parts by weight of a deodorizing ingredient. The deodorizing ingredient is a white or substantially colorless deodorizing agent, which may be preferably be composed of 10-90 parts by weight of a...http://www.google.com/patents/US4880852?utm_source=gb-gplus-sharePatent US4880852 - Polyethylene or polypropylene, zinc oxide blendAdvanced Patent SearchPublication numberUS4880852 APublication typeGrantApplication numberUS 07/185,409Publication dateNov 14, 1989Filing dateApr 25, 1988Priority dateApr 7, 1986Fee statusPaidAlso published asUS4757099, US5063256Publication number07185409, 185409, US 4880852 A, US 4880852A, US-A-4880852, US4880852 A, US4880852AInventorsAkira Hoshino, Mikio Saji, Isamu YamaguchiOriginal AssigneeDainichiseika Color & Chemicals Mfg. Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (2), Referenced by (10), Classifications (17), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetPolyethylene or polypropylene, zinc oxide blend
US 4880852 AAbstract
A deodorizing resin composition is composed of 99.9-50 parts by weight of a thermoplastic resin and 0.1-50 parts by weight of a deodorizing ingredient. The deodorizing ingredient is a white or substantially colorless deodorizing agent, which may be preferably be composed of 10-90 parts by weight of a zinc compound and 90-10 parts by weight of an aliphatic polycarboxylic acid or a salt thereof, an aromatic polycarboxylic acid or a salt thereof, an acidic polymer or a salt thereof, or a sulfate of aluminum. A formed deodorizing article can be obtained by forming or molding the deodorizing resin composition into a desired shape. Formed articles of the deodorizing resin composition of this invention can have desired beautiful colors and are adapted to absorb offensive odors.
1. A resin composition, comprising:99.9-50 parts by weight of a thermoplastic polyolefin resin and 0.1-50 parts by weight of a combination of a zinc compound and a sulfate of aluminum, which combination functions as a deodorizing ingredient. 2. The resin composition as claimed in claim 1, wherein the deodorizing agent is composed of 10-90 parts by weight of a zinc compound and 90-10 parts by weight of a sulfate of aluminum.
3. The resin composition as claimed in claim 2, wherein the sulfate of aluminum is aluminum sulfate or potassium aluminum sulfate.
4. A shaped resin article obtained by shaping a resin composition comprising 99.9-50 parts by weight of a thermoplastic polyolefin resin and 0.1-50 parts by weight of a combination of a zinc compound and a sulfate of aluminum, which combination functions as a deodorizing ingredient.
5. The shaped resin article as claimed in claim 1, wherein the deodorizing agent is composed of 10-90 parts by weight of a zinc compound and 90-10 parts by weight of a sulfate of aluminum.
6. The shaped resin article as claimed in claim 5, wherein the sulfate of aluminum is aluminum sulfate or potassium aluminum sulfate.
This is a division of application Ser. No. 928,377, filed Nov. 10, 1986.
This invention relates to deodorizing resin compositions and formed deodorizing articles, and more specifically to formed deodorizing articles suitable expecially for use in packaging or wrapping various malodorous articles and the like. The term "formed articles" as used herein should be interpreted in a broad sense so that it embraces therein various formed articles such as films, sheets, molded articles, etc.
The present inventors have carried out an extensive investigation with a view toward providing a solution to such drawbacks of conventional techniques as mentioned above. As a result, it has been found that they can be solved by the incorporation of certain specific materials in a thermoplastic resin to be employed upon production of a formed article such as plastic sheet or plastic container since the resulting formed article, for example, packaging material has excellent deodorizing capacity, leading to completion of this invention.
It has been known in the prior art to use a ferrous salt as a deodorizing ingredient of a deodorizer. When such a deodorizing ingredient is used in a form kneaded in a thermoplastic resin or the like, the ferrous salt however undergoes discoloration due to the high processing temperature of the thermoplastic resin. Accordingly, the thermoplastic resin is tinged in a brown color and at the same time, its deodorizing effects are lowered. Moreover, the commercial values of resin articles to be formed from such a resin will lowered significantly. When activated carbon is used on the other hand, the thermoplastic resin is tinged in a black color. Unlike such prior art techniques, a white or substantially colorless zinc compound is employed in lieu of such a ferrous salt or activated carbon in the present invention. On addition, a white or substantially colorless aliphatic polycarboxylic acid or the like is also used in combination with the zinc compound, so that even at high processing temperatures employed upon kneading such deodorizing agents into the thermoplastic resin, the deodorizing agents do not lose their deodorizing effects and undergo little discoloration into brown or black colors. It has also been found that the zinc compound and the aliphatic polycarboxylic acid or the like exhibit synergistic deodorizing effects greater than the sum of their respective deodorizing effects. The deodorizing resin composition of this invention can therefore exhibit sufficient deodorizing effects not only for offensive odor components of the amine type but also for sulfur-containing offensive odor components. In addition, the resultant thermoplastic resin composition is either white or substantially colorless, it can be colored into any desired hue with one or more other colorants.
The term "thermoplastic resin" as used herein includes, for example, synthetic or modified thermoplastic resins, for example, polyolefin resins such as polyethylene and polypropylene, polyvinyl chloride, vinylon, polystyrene, polyamides, polyesters, and cellulose acetate, which have conventionally been used in various formed articles, for example, plastic films, plastic sheets, plastic containers, fibers, etc. All of these thermoplastic resins are readily available on the market for use in the present invention. These thermoplatic resins may be in solid forms or in the form of liquid such as paste.
Homopolymers of vinyl ether ester monomers and the like or polycarboxylic acids, and random copolymers, block copolymers, graft copolymers and like of the vinyl ether ester monomers and and other general monomers;
Cellulose derivative such as ethyl cellulose, hydrogenacetate hydrogensulfate phthalate, cellulose hydrogenacetate hydrogensulfate phthalate, ethyl cellulose hydrogensulfobenzoate, sulfonbenzyl cellulose acetate and ethyl sulfoethyl cellulose acetate;
Homopolymers of other sulfonic acids or phenolic group containing monomers, and random copolymers, block copolymers, graft copolymers and like of the other sulfonic acids or phenolic group containing monomers;
may mentioned acidic modified products obtained by modifying various polymers with carboxyl carboxyl, sulfonic or phenolic group containing compounds.
The deodorizing resin composition of this invention can be obtained by either simply mixing the above components or melting, kneading and granulating the resultant mixture into pellets. In addition, the deodorizing resin composition of this invention may also be in the form of a master batch which contains the deodorizing ingredient at a high concentration (for example, 10-50 wt. %), so that it may be extended with a plain thermoplastic resin prior to its use.
This invention will hereinafter be described more specifically by the following Examples, in which all designations of "part or parts" and "%" mean part or parts by weight and wt. % unless otherwise specifically indicated.
To 99 parts of low-density polyethylene, 1 part of a 10:3 mixture by weight of zinc carbonate and fumaric acid was added. They were mixed in a mixer and then kneaded in a 40 mm extruder (L/D: 28, C.R.: 3.1, Dulmage screw, cylinder temperature: 130� C., screw revolution speed: 70 rpm), thereby a pellet-like deodorizing resin composition of this invention was obtained.
The above deodorizing resin composition was then charged in an inflation molding machine (30 mm extruder, inner diameter of inflation die: 50 mm, cylinder temperature: 140� C., screw revolution speed: 60 rpm) to obtain a polyethylene film having a thickness of about 50 μm. The deodorizing performance of the deodorizing sheet was tested. The following results were obtained.
DEODORIZING TEST ON AMMONIA
The above deodorizing sheet were cut into 50 mm�200 mm sheets. One of the thus-cut sheets was then suspended in a 300-ml Erlenmeyer flask, followed by an addition of 100 ml of 42 ppm aqueous ammonia. The outlet of the flask was sealed with paraffin and the aqueous ammonia was allowed to gasify fully. The flask was thereafter stored at 25� C. and upon an elapse of a predetermined time period, the concentration (ppm) of ammonia in the flask was measured by a Kitagawa's probe. The following results were obtained.
______________________________________Lapsed time 1 day        2 days  9 days______________________________________Blank       25           25      25Invention   20           15      10productComparative 20           18      15Example______________________________________
DEODORIZING TEST ON HYDROGEN SULFIDE
One of the above-cut sheets was placed in a 300-ml Erlenmeyer flask, followed by addition of 1 ml of an 800 ppm solution of sodium sulfide in water and 0.1 ml of 1N sulfuric acid. The outlet of the flask was sealed with paraffin and the resulting hydrogen sulfide was allowed to gasify fully. The flask was thereafter stored at 25� C. and upon an elapse of a predetermined time period, the concentration (ppm) of hydrogen sulfide in the flask was measured by a Kitagawa's probe. The following results were obtained.
______________________________________Lapsed time 1 day        2 days  9 days______________________________________Blank       155          155     155Invention   40           3       traceproductComparative 55           5       1Example______________________________________
______________________________________High-density polyethylene                  95    parts8:2 Mixture of zinc oxide and                  5     partsfumaric acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      10productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polypropylene          95    parts5:5 Mixture of zinc carbonate                  5     partsand citric acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 daysBlank       25          25      25Invention   20          16      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   25          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polystyrene            98    parts3:7 Mixture of zinc chloride                  2     partsand fumaric acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day        2 days  9 days______________________________________Blank       25           25      25Invention   17           13      7productComparative 20           18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day        2 days  9 days______________________________________Blank       55           55      55Invention   40           3       traceproductComparative 55           5       1Example______________________________________
______________________________________High-density polyethylene                   99    parts10:3 Mixture of zinc carbonate                   5     partsand trimellitic acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          1       notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene                   95     parts8:2 Mixture of zinc oxide                   5     partsand trimellitic acid______________________________________Deodorizing test on ammonia:Lapsed time      1 day       2 days   9 days______________________________________Blank      25          25       25Invention  20          15       11productComparative      20          18       15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time      1 day       2 days   9 days______________________________________Blank      155         155      155Invention  30          not      notproduct                detected detectedComparative      55          5        1Example______________________________________
______________________________________Polypropylene           95    parts5:5 Mixture of zinc carbonate                   5     partsand trimellitic acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day        2 days  9 days______________________________________Blank       25           25      25Invention   20           16      11productComparative 20           18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day        2 days  9 days______________________________________Blank       155          155     155Invention   40           3       traceproductComparative 55           5       1Example______________________________________
______________________________________Polystyrene            98    parts3:7 Mixture of zinc chloride                  2     partsand trimellitic acid______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   17          13      11productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   45          3       notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene 99    parts10:3 Mixture of zinc carbonate                     1     partsand an acidic polymer ("NEW FRONTIERMI-400P", trade name; product ofDai-ichi Kogyo Seiyaku Co., Ltd.,Kyoto, Japan)______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene 95    parts8:2 Mixture of zinc oxide and                     5     partsan acidic polymer ("TESKYD MRM43",trade name; product of HitachiKasei Polymer Co., Ltd., Tokyo,Japan).______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      13productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polypropylene            95    parts5:5 Mixture of zinc carbonate                    5     partsand an acidic polymer ("TESKYDMRA-L", trade name; product ofHitachi Kasei Polymer Co., Ltd.,Tokyo, Japan).______________________________________Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          16      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   25          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polystyrene              98 parts3:7 Mixture of ferrous sulfide                     2 partsand an acidic polymer ("NEW FRONTIERMI-400P", trade name; prouct ofDai-ichi Kogyo Seiyaku Co., Ltd.,Kyoto, Japan)Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   17          13      10productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       55          55      55Invention   40          3       traceproductComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene                 95 parts8:2 Mixture of aluminum                  5 partssulfate and an acidic polymer("TESKYD MRM43", trade name;product of Hitachi Kasei PolymerCo., Ltd., Tokyo, Japan).Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polyethylene             95 parts5:3:2 Mixture of zinc carbonate,                     5 partsaluminum sulfate and an acidicpolymer ("TESKYD MRA-L", trade name;product of Hitachi Kasei PolymerCo., Ltd., Tokyo, Japan)Deodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          16      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   25          trace   notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene               99 parts10:3 Mixture of zinc carbonate                1 partsand aluminum sulfateDeodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      11productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          1       notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________High-density polyethylene               95 parts8:2 Mixture of zinc oxide and                5 partsaluminum sulfateDeodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   20          15      12productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   25          1       notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polyethylene         95 parts5:5 Mixture of zinc carbonate                5 partsand potassium aluminum sulfateDeodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   18          13      10productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   35          2       notproduct                         detectedComparative 55          5       1Example______________________________________
______________________________________Polystyrene         98 parts3:7 Mixture of zinc chloride                2 partsand aluminum sulfateDeodorizing test on ammonia:Lapsed time 1 day       2 days  9 days______________________________________Blank       25          25      25Invention   17          13      10productComparative 20          18      15Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time 1 day       2 days  9 days______________________________________Blank       155         155     155Invention   30          1       notproduct                         detectedComparative 55          5       1Example______________________________________
Furthermore, the comparative products were all stained in brown colors while those produced respectively from the invention products were not stained practically.
In addition, bags were produced respectively from the films employed as the blanks, invention products and comparative products in Examples 1-18. Thawed small fish was placed within the bags. The bags were left over and were then opened three days later. Little offensive odors were felt in the bags produced from the films of this invention, whereas strong offensive odors were emitted from the bags made of the blanks. Furthermore, the comparative products were all stained deeply in brown colors while those produced respectively from the invention products were not stained practically.
The deodorizing resin composition was extended with plain high-density polyethylene to a total volume 20 times the original. The resulting resin composition was then molded into a bottle-like molded article having a wall thickness of 1 mm, a diameter of 60 mm and a height of 170 mm by means of a blow molding machine (45 mm screw, screw revolution speed: 30 rpm, cylinder temperature: 200� C.). Partially tainted meat was hermetically sealed within the molded article. After allowing the molded article to stand for 3 days, the offensive odor was remarkably weaker compared with that emitted from a molded article similar to the above molded article except for the exclusion of the deodorizing ingredient.
Seventy parts of polypropylene and 30 parts of a deodorizing ingredient (a 10:3 mixture of zinc acetate and fumaric acid) were mixed together. They were mixed for 2 minutes at 1,500 rpm in a Henschel mixer and then kneaded in a 40-mm extruder (L/D: 28; C.R.: 3.1; Dulmage screw; cylinder temperature: 200�-215� C.; screw revolution speed: 90 rpm), thereby obtaining pellet-like deodorizing resin composition of this invention. It was extended to a natural resin to a total volume 10 times it original volume. The thus-extended resin was spun at 200�-215� C. through a spinning machine, followed by stretching at a draw ratio of 3 into fibers of 15 denier. The deodorizing performance of the deodorizing fibers was tested. The following results were obtained.
One gram of the above deodorizing fibers was placed in a 300-ml Erlenmeyer flask, followed by an addition of 10 μl of 28% aqueous ammonia. The outlet of the flask was sealed with paraffin and the aqueous ammonia was allowed to gasify fully. The flask was thereafter stored at 25� C. and upon an elapse of a predetermined time period, the concentration (ppm) of ammonia in the flask was measured by a Kitagawa's probe. The following results were obtained.
______________________________________Lapsed time      5 minutes  30 minutes                           120 minutes______________________________________Blank      4000       4000      4000Invention  2500       850       300productComparative      3000       1000      500Example______________________________________
One gram of the above deodorizing fibers was placed in a 300-ml Erlenmeyer flask, followed by addition of 1 ml of an 800 ppm solution of sodium sulfide in water and 0.1 ml of 1N sulfuric acid. The outlet of the flask was sealed with paraffin and the resulting hydrogen sulfide was allowed to gasify fully. The flask was thereafter stored at 25� C. and upon an elapse of a predetermined time period, the concentration (ppm) of hydrogen sulfide in the flask was measured by a Kitagawa's probe. The following results were obtained.
______________________________________Lapsed time      1 day       2 days   9 days______________________________________Blank      170         170      170Invention  trace       not      notproduct                detected detectedComparative      55          3        1Example______________________________________
______________________________________Deodorizing test on ammonia:Lapsed time      5 minutes  30 minutes                           120 minutes______________________________________Blank      4000       4000      4000Invention  2500       900       400productComparative      3000       1000      500Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time      1 day       2 days   9 days______________________________________Blank      170         170      170Invention  trace       not      notproduct                detected detectedComparative      55          3        1Example______________________________________
(2) A 10:3 mixture by weight of zinc oxide and an acidic polyer ("TESKYD MRA-L", trade name; product of Hitachi Kasei Polymer Co., Ltd., Tokyo, Japan)
______________________________________Deodorizing test on ammonia:Lapsed time      5 minutes  30 minutes                           120 minutes______________________________________Blank      4000       4000      4000Invention  2500       850       300productComparative      3000       1000      500Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time      1 day       2 days   9 days______________________________________Blank      170         170      170Invention  trace       not      notproduct                detected detectedComparative      5           3        1Example______________________________________
______________________________________Deodorizing test on ammonia:Lapsed time      5 minutes  30 minutes                           120 minutes______________________________________Blank      4000       4000      4000Invention  2500       850       400productComparative      3000       1000      500Example______________________________________Deodorizing test on hydrogen sulfide:Lapsed time      1 day       2 days   9 days______________________________________Blank      170         170      170Invention  trace       not      notproduct                detected detectedComparative      5           3        1Example______________________________________ Note In each of the above tests the blank was fibers not added with any deodorizing ingredient, while ferrous sulfate was used solely in the Comparative Example. The films of the Comparative Examples were stained in brown colors while the invention products were not stained practically.
Thoroughly mixed into a plastisol were 50 parts of a PVC paste resin ("SUMILIT PXN", trade name; product of Sumitomo Chemical Co., Ltd., Osaka, Japan), 20 parts of dioctyl phthalate, 4 parts of a plasticizer of the lactic acid ester type ("C.L.P.", trade name; product of Daihachi Chemical Industry Co., Ltd., Osaka, Japan), 1 part of cadmium-barium base stabilizer, 20 parts of calcium carbonate, 5 parts of zinc oxide, and 20 parts of a mixture which consisted of 20 parts by weight of potassium aluminum sulfate, 15 parts by weight of citric acid and 5 parts by weight of sodium citrate. The plastisol was then coated on one side of a flame-retarded paper sheet to a thickness of 0.2 mm, followed by its gelation at 140� C. for 60 seconds. The thus-coated surface was thereafter printed and embossed to provide a deodorizing PVC sheet material of this invention.
The above deodorizing PVC sheet material of this invention was then cut into 50 mm�200 mm sheets. Two sheets were then adhered with their uncoated surfaces inside so as to avoid influence of the uncoated surfaces. The thus-adhered sheets were placed in a 300-ml Erlenmeyer flask, followed by an addition of 10 μl of 28% aqueous ammonia. The flask was hermetically sealed to gasify the ammonia fully. At 25� C., ammonia gas was detected periodically by means of a Kitagawa's probe. The following deodorizing effects were obtained (unit: ppm).
______________________________________Lapsed time      5 minutes  30 minutes                           120 minutes______________________________________Blank      4000       4000      4000Invention  2500       700       100product______________________________________ Note The blank was the same PVC sheet material as the invention product except for the exclusion of the deodorizing ingredient.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4735972 *Aug 25, 1986Apr 5, 1988Daicel Chemical Industries, Ltd.Polyolefins containing deodorizing metal sulfate powdersUS4757099 *Nov 10, 1986Jul 12, 1988Dainichiseika Color & Chemicals Mfg. Co., Ltd.Deodorizing resin compositions and formed deodorizing articles* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6358537May 3, 2000Mar 19, 2002Dainichiseika Color & Chemicals Mfg. Co, Ltd.Deodorant and antimicrobial dispersionsUS6555102May 3, 2000Apr 29, 2003Dainichiseika Color & Chemicals Mfg. Co., Ltd.An oxide or hydroxide of an alkaline earth metal; hydrated silica; and a cationic surfactant represented by the formula HO-R-NHCH2CH2OH in which R is a C12-C14 alkylene group.US8127519Jul 14, 2008Mar 6, 2012Stravitz David MMethod of inserting and storing waste for disposalUS8215089Jul 14, 2008Jul 10, 2012David StravitzWaste disposal devicesUS8567157Oct 30, 2009Oct 29, 2013Munchkin, Inc.System for disposing waste packages such as diapersUS8635838Oct 30, 2009Jan 28, 2014Munchkin, Inc.System for disposing waste packages such as diapersUS8647587Oct 30, 2009Feb 11, 2014Munchkin, IncPowder dispensing assembly for a waste containerUS8690017Oct 30, 2009Apr 8, 2014Munchkin, Inc.Powder dispensing assembly for a waste containerUS8739501Oct 30, 2009Jun 3, 2014Munchkin, Inc.System for disposing waste packages such as diapersUS8833592Oct 30, 2009Sep 16, 2014Munchkin, Inc.System and method for disposing waste packages such as diapersClassifications U.S. Classification523/102, 524/423International ClassificationA61L9/01, C08K5/098, A61L9/04, C08K3/00, C08K3/22Cooperative ClassificationC08K3/0091, A61L9/042, C08K5/098, C08K3/22, A61L9/01European ClassificationC08K3/00S4, C08K3/22, A61L9/04B, A61L9/01, C08K5/098Legal EventsDateCodeEventDescriptionApr 26, 2001FPAYFee paymentYear of fee payment: 12May 1, 1997FPAYFee paymentYear of fee payment: 8Apr 7, 1993FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services