Patent GB-1119349-A (GB)
Title: Process for protecting materials against microbial attack and products obtained thereby
IPC: C08K5/56
Filed: 1965-05-24
Abstract: Polymeric materials are rendered resistant to microbial attack by incorporating an aryl mercury compound having the group <FORM:1119349/C3/1> substituted on vicinal carbon atoms.  The compound may be incorporated by formation in situ at temperatures of at least 70 DEG  C. from suitable precursors, e.g. an aryl mercury salt such as that of benzoic or benzene dicarboxylic acid or a mixture of a mercury salt and an aryl carboxylic acid.  Specified polymeric materials are cellulose esters; natural and synthetic rubbers, e.g. from dienes or halodienes, styrene, acrylonitrile, (meth)acrylates or vinyl pyridine or quinoline; polyesters, polyamides and polyurethanes; phenolics; and addition polymers, e.g. P.V.C. and polyolefins.  In some cases the compounds can be combined in the polymers, e.g. by reaction through the carboxylic anhydride into polyesters or polyamides or by reaction with the double bond in addition polymerization.  It is also stated that polyesters into which the compound has been reacted can be used to plasticize P.V.C. and that the vinyl ester of anhydro-2-mercury-hydroxy benzoic acid may be polymerized or copolymerized.  In one exemplary procedure the microbicide is incorporated in an acrylic resin used to impregnate paper which is laminated with plywood.ALSO:Polymeric materials are rendered resistant to microbial attack by incorporating an aryl mercury compound having the group <FORM:1119349/C2/1> substituted on vicinal carbon atoms.  The compound may be incorporated by formation in situ at temperatures of at least 70 DEG  C. from suitable precursors, e.g. an aryl mercury salt such as that of benzoic or -benzene dicarboxylic acid or a mixture of a mercury salt and an aryl carboxylic acid.  Specified polymeric materials are cellulose esters; natural and synthetic rubbers e.g. from dienes or halodienes, styrene, acrylonitrile, (meth)acrylates or vinyl pyridine or quinoline; polyesters, polyamides and polyurethanes; phenolics; and addition polymers, e.g. P.V.C. and polyolefins.  In some cases the compounds can be combined in the polymers e.g. by reaction through the carboxylic anhydride into polyesters or polyamides or by reaction with the double bond in addition polymerization.  It is also stated that polyesters into which the compound has been reacted can be used to plasticize P.V.C. and that the vinyl ester of anhydro-2-mercurihydroxy benzoic acid may be polymerized or copolymerized.  In one examplary procedure the microbicide is incorporated in an acrylic resin used to impregnate paper which is laminated with plywood. The aryl group of the mercury compound may be monohetero- or polycyclic and may be substituted e.g. by Ha, C1- 8 alkyl or alkoxy, carboxy, nitro or cyano.  Various methods of preparation are specified e.g. reaction of the disodium salt of the corresponding di-ortho aryl carboxylic acid with a mercuric salt in aqueous or non-aqueous media; heating the di-mercuric salt of such acids; or heating ortho-chloromerecuric or hydroxy mercuric carboxylic acids.ALSO:Polymeric materials are rendered resistant to microbial attack by incorporating an aryl mercury compound having the group- <FORM:1119349/A5-A6/1> -substituted on Vicinal carbon atoms. The compound may be incorporated by formation in situ at temperatures of at least 70 DEG C from suitable precursors, e.g. an aryl mercury salt such as that of benzoic or -benzene dicarboxylic acid or a mixture of a mercury salt and an aryl carboxylic acid.  Specified polymeric materials are cellulose esters; natural and synthetic rubbers e.g. from dienes or halodienes, styrene, acrylonitrile, (meth)acrylates or vinyl pyridine or quinoline; polyesters, polyamides and polyurethanes; phenolics; and addition polymers, e.g. P.V.C. and polyolefins.  In some cases the compounds can be combined in the polymers e.g. by reaction through the carboxylic anhydride into polyesters or polyamides or by reaction with the double bond in addition polymerisation.  It is also stated that polyesters into which the compound has been reacted can be used to plasticise P.V.C. and that the vinyl ester of anhydro-2-mercurihydroxy benzoic acid may be polymerised or copolymerised.  In one exemplary procedure the microbicide is incorporated in an acrylic resin used to impregnate paper which is laminated with plywood.