Patent GB-401534-A (GB)
Title: Moisture proofing composition
IPC: D06F15/00
Filed: 1933-02-04
Abstract: A moisture-proofing composition, especially applicable for proofing paper, and films of regenerated cellulose, comprises chlorinated rubber and a wax, e.g. paraffin, carnauba, or montan, or waxy substances, e.g. stearic acid, the wax being present in such proportion that a substantially transparent film is formed. Solvents, plasticizers, (e.g. dibutyl phthalate, tricresyl phosphate or linseed oil), resin or the like, (e.g. ester gum, copal, phenol-formaldehyde resin, &c.), and pigments may be included.  Chlorinated rubber may be prepared from vulcanized rubber by removing the sulphur by boiling in caustic alkali, washing, neutralizing the alkali, suspending in carbon tetrachloride and passing chlorine through the liquid; or unvulcanized rubber may be placed in a solvent for both rubber and chlorinated rubber, e.g. carbon tetrachloride and chlorine passed through.  Other methods of chlorinating rubber are described in Specification 127,481, [Class 70, Indiarubber &c.].  A typical example comprises 90 parts of chlorinated rubber, preferably above 67 per cent chlorine content, 10 parts of paraffin wax, and sufficient solvent to give the desired plasticity according to the method of application, e.g. brushing, spraying, &c.ALSO:A moisture-proofing composition, especially applicable for proofing films of regenerated cellulose, comprises chlorinated rubber and a wax, paraffin, carnauba, montan, stearic acid or waxy substance, the wax being present in such proportion that a substantially transparent film is formed.  Solvents, plasticizers (e.g. dibutyl phthalate, tricresyl phosphate or linseed oil), resin or the like (e.g. ester gum, copal, phenol-formaldehyde resin, &c.) and pigments may be included.  A typical example comprises 90 parts of chlorinated rubber preferably above 67 per cent.chlorine content, 10 parts of paraffin wax and sufficient solvent to give the desired plasticity according to the method of application, e.g. brushing, spraying &c.ALSO:A moisture-proofing composition, especially applicable for proofing paper, and films of regenerated cellulose, comprises chlorinated rubber and a wax, e.g. paraffin, carnauba, montan, or a waxy substance, e.g. stearic acid, the wax being present in such proportion that a substantially transparent film is formed. Solvents, plasticizers, (e.g. dibutyl phthalate, tricresyl phosphate or linseed oil), resin or the like (e.g. ester gum, copal, phenol-formaldehyde resin &c.) and pigments may be included.  Chlorinated rubber may be prepared from vulcanized rubber by removing the sulphur by boiling in caustic alkali, washing, neutralizing the alkali, suspending in carbon tetrachloride and passing chlorine through the liquid: or unvulcanized rubber may be placed in a solvent for both rubber and chlorinated rubber, e.g. carbon tetrachloride and chlorine passed through.  Other methods of chlorinating rubber are described in Specification 127,481, [Class 70, Indiarubber &c.].  A typical example comprises 90 parts of chlorinated rubber preferably above 67 per cent. chlorine content, 10 parts of paraffin wax and sufficient solvent to give the desired plasticity according to the method of application, e.g. brushing, spraying, &c.