Source: http://www.google.com/patents/US5589528?dq=5708422
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Patent US5589528 - Biodegradable adhesives from hydrcolloids and water - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA water-soluble, biodegradable, repulpable, waterbearing colloidal hydrogel material manufactured from a mixture of natural organic materials, water and additives which is capable of being heated and applied with hot melt glue application equipment for use in paper bag sealing, corrugated and paperboard...http://www.google.com/patents/US5589528?utm_source=gb-gplus-sharePatent US5589528 - Biodegradable adhesives from hydrcolloids and waterAdvanced Patent SearchPublication numberUS5589528 APublication typeGrantApplication numberUS 08/598,089Publication dateDec 31, 1996Filing dateFeb 7, 1996Priority dateJun 13, 1994Fee statusLapsedPublication number08598089, 598089, US 5589528 A, US 5589528A, US-A-5589528, US5589528 A, US5589528AInventorsLawrence S. BogardyOriginal AssigneeBogardy; Lawrence S.Export CitationBiBTeX, EndNote, RefManPatent Citations (9), Referenced by (5), Classifications (22), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetBiodegradable adhesives from hydrcolloids and waterUS 5589528 AAbstract A water-soluble, biodegradable, repulpable, waterbearing colloidal hydrogel material manufactured from a mixture of natural organic materials, water and additives which is capable of being heated and applied with hot melt glue application equipment for use in paper bag sealing, corrugated and paperboard carton closure, and fishing lures.
What is claimed is: 1. A biodegradable, water soluble, and repulpable hot melt adhesive comprising:from 50 to 70% by weight hydrocolloids; and from 25 to 50% by weight water; said hot melt adhesive having a melting point below approximately 43� C. 2. The hot melt adhesive as claimed in claim 1, wherein said hydrocolloids are selected from the group consisting of animal hide and bone, fish, blood, gelatin, casein, vegetable, grain, legume, starch, cellulosic, hydrolyzed polyvinyl alcohol, and hydrolyzed polyvinyl chloride.
BRIEF SUMMARY OF THE INVENTION The present invention is a chemical modification of a natural organic hot melt glue based on animal, mineral and vegetable waterbearing colloidal hydragels. Natural organic materials such as animal hide and bone, fish, blood and casein; soy, starch, cellulosics, hydrocarbon resins and super hydrolyzed polyvinyl alcohols and polyvinyl chlorides are examples of the base materials from which the present hot melt glue and products can be formed. Many of the natural organic solutions occur as a result of supersaturated solutions which are liquid at elevated temperature and are gelatinous at ambient temperature.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiment of the present invention is a biodegradable and repulpable hot melt glue for use in piston or gear type hot melt application devices having a solids content of up to 90% by weight, and preferably 65% by weight, and a water content of less than 55% by weight, and preferably 35% or less by weight. The above-described mixture is a liquid at over approximately 38� C. (100� F.) at atmospheric pressure, and a gel at below approximately 38� C. (100� F.) at atmospheric pressure, and demonstrates a linearly degrading viscosity with increases in temperature up to 60� C. (140� F.) at a constant water content, and further includes components which protect internal pump components from corrosion and erosion. The gel formed upon cooling has sufficient strength and consistency to bond to the substrate, such as the paper bag, the corrugated cannon or other paperboard products. A typical preferred formula is prepared in two stages as follows:
Primary Sub Mixture ______________________________________Component           Preferred Range______________________________________water               10     parts   5-15oxyalkylene polymer 300 MW               50     parts  25-75oxyalkylene polymer 3500 MW               150    parts  100-200glycerine 96% USP   50     parts  25-75complex ethoxylate  20     parts  10-30sodium alkyl sulfonate               10     parts   5-15hydrocarbon defoamer               20     parts  10-30cetylpyridinium chloride USP               4      parts  2-6______________________________________
Secondary Sub Mixture ______________________________________Component        Preferred                     Range______________________________________water            35    parts  20-50glue solids      25    parts  15-40sugar solids     20    parts  10-30magnesium sulfate            15    parts   5-25starch           3     parts  1-5odorant          1     part   0-3antimicrobial    1     part   0-3______________________________________
EXAMPLE 1 Spring Back Test. A 0.24 cm (3/32") bead of adhesive 7.6 cm (3") long was applied to Sample 1. After three seconds, Sample 1 was folded over on itself with the bead of adhesive between the folds of the sample. The folded sample was held compressed for three seconds. No spring back opening was considered a pass. All samples passed.
EXAMPLE 2 Pull Test. A 0.24 cm (3/32") bead was applied to the center line of a 5 cm (2") wide piece of Sample 2. A second 5 cm (2") wide piece of Sample 2 was placed on top of the adhesive and the two pieces of Sample 2 were compressed together with the bead of adhesive in between. The samples were set aside for five (5) minutes. The combined sample was then pull tested. Demonstrated fiber pull was considered a pass. All samples passes.
EXAMPLE 3 High Temperature Cycle 1. Samples made in accordance with Example 1 were stored in a warehouse atmosphere for two (2) hours. The samples were then placed in an oven at a temperature of 74� C. (165� F.). No spring back opening after fifteen (15) minutes was considered a pass. All samples passed.
EXAMPLE 4 High Temperature Cycle 2. Samples made in accordance with Example 1 were stored in a warehouse atmosphere for four (4) hours. The samples then were place in an oven at a temperature of 82� C. (180� F.). No spring back opening after fifteen (15) minutes was considered a pass. All samples passed.
EXAMPLE 5 Humidity Test. Four (4) samples from Example 4 and two (2) samples from Example 1 were place in a humidity chamber for seventy-two (72) hours. The humidity chamber had a tray of water in it to provide a humid atmosphere. No spring back opening was considered a pass. All samples passed.
EXAMPLE 6 Humidity and Temperature Cycle Test. The six (6) samples from Example 5 were removed from the humidity chamber and placed in a cool oven. The oven was turned on and the temperature was allowed to rise to 85� C. (185� F.). No spring back opening after fifteen (15) minutes was considered a pass. All samples passed.
EXAMPLE 7 Solvent Test. Samples as made in accordance with Example 1 were dipped in gasoline. The samples were placed in a sealed container for an extended period of time. No spring back opening after twelve (12) hours after being dipped in gasoline was considered a pass. All samples passed.
EXAMPLE 8 Humidity Pull Test. Four (4) samples made in accordance with Example 2 were suspended horizontally in a humidity chamber as described in Example 5. A 100 gram weight was affixed to the lower piece of the samples. The samples were maintained in the humidity chamber for seventy-two (72) hours. No glue release was considered a pass. All samples passed. A 0.16 cm (1/16") movement of the lower sample piece relative to the upper sample piece was noted; however, the movement was the result of fiber pull and not glue failure.
EXAMPLE 9 Freeze Test. The adhesive was formed into a 100 gram sample from the Meltex hot glue gun. The formed sample was place in a freezer at -18� C. (0� F.) for seventy-two (72) hours. The lack of formation of internal ice crystals was considered a pass. All samples passes.
EXAMPLE 10 Freeze Spring Back Test. The freeze-tested sample of Example 9 was cut into pieces and placed back in the hot melt glue gun. The adhesive then was heated and applied to a specimen of Sample 1 as in Example 1, and subjected to the Spring Back Test. No spring back opening was considered a pass. All samples passed.
EXAMPLE 11 Aging Test. The adhesive was left in the hot melt glue gun for one week with the heat set at 30% above the recommended application temperature. A lack of charring of the adhesive was considered a pass. All samples passed.
EXAMPLE 12 Water Solubility Test. 10 grams of the adhesive was extruded into a beaker containing 100 ml. of tap water. The sample was left in the tap water for seven (7) days. Degradation of the sample into the tap water was considered a pass. The sample degraded into a cloudy liquid. All samples passed.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS4569985 *Aug 2, 1985Feb 11, 1986Union Camp CorporationPoly(ester-amide) hot-melt adhesiveUS4602058 *Jul 2, 1984Jul 22, 1986The Dow Chemical CompanyCompatibility and stability of blends of polyamide and ethylene copolymersUS4656242 *Jun 7, 1985Apr 7, 1987Henkel CorporationHot melt adhesivesUS4725488 *Nov 21, 1986Feb 16, 1988Henkel CorporationMylar, polycarbonates bonding; tall oil fatty acid polymer componentUS4992100 *Aug 7, 1989Feb 12, 1991Deutsche Gelatine-Fabriken Stoess & Co. GmbhPlasticized molding materialUS5362801 *Dec 2, 1993Nov 8, 1994Rohm And Haas CompanyHot melt adhesives made from the blend of polyvinyl alcohol copolymers and copolymers from unsaturated monomersUS5382451 *Apr 6, 1992Jan 17, 1995Minnesota Mining And ManufacturingMethod for coating adhesive polymersDE4225465A1 *Aug 1, 1992Feb 17, 1994Fritz Haecker U Sohn Gmbh & CoBiodegradable low melt hot melt adhesive and prodn. from gluten glue - by adjusting water content and opt. adding plasticiser, etc. and use for bonding material, esp. wood, paper, cardboard or foamed plasticsJPH05287249A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS6696115 *Aug 22, 2002Feb 24, 2004Kennair, Iii Patrick J.Methods of making realistic artificial oysters on the half-shellUS6846502Jun 26, 1996Jan 25, 2005National Starch & Chemical Investment Holding CorporationEdible hot melt compositionEP0815741A2 *May 27, 1997Jan 7, 1998National Starch and Chemical Investment Holding CorporationEdible adhesive composition comprising a starch and a plasticizer, and its use for adhering particulate coatings on foodstuffsEP2433995A1Sep 28, 2010Mar 28, 2012Co�peratie Avebe U.A.Adhesive compositionWO2012044164A1Sep 27, 2011Apr 5, 2012Co�peratie Avebe U.A.Adhesive composition* Cited by examinerClassifications U.S. Classification524/17, 524/21, 106/145.1, 106/163.01, 106/125.1, 106/124.6, 106/124.61, 106/206.1, 106/124.5, 106/162.9, 106/135.1, 106/146.1, 524/18, 524/19, 106/126.1, 106/124.51, 156/328International ClassificationC09J189/00, C08L71/02Cooperative ClassificationC09J189/00, C08L71/02European ClassificationC09J189/00Legal EventsDateCodeEventDescriptionMar 6, 2001FPExpired due to failure to pay maintenance feeEffective date: 20001231Dec 31, 2000LAPSLapse for failure to pay maintenance feesJul 25, 2000REMIMaintenance fee reminder mailedRotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google