Patent GB-958856-A (GB)
Title: Copolymers
IPC: C08F30/02
Filed: 1962-06-04
Abstract: Copolymers suitable for use as coating compositions are prepared by polymerizing a mixture comprising (1) one or more esters of acrylic and/or methacrylic acid having 1 to 20 carbon atoms in the alcohol moiety, (2) 1 to 30% by weight, based on the total monomer mixture, of a methylol compound and/or an alkyl ether thereof of acrylic and/or methacrylic acid amide, the alkyl residue of the said ether containing not more than 10 carbon atoms, (3) 0.1 to 10% by weight, based on the total monomer mixture, of a mixed ester of a diol or a monothiodiol esterified with acrylic or methacrylic acid and a di- or polybasic organic or inorganic acid having a pk value of less than 4, and (4) if desired, up to 20% by weight of the total monomer mixture, of one or more monomers copolymerizable with said monomers (1) to (3). Preferably emulsion polymerization in an aqueous phase or solution polymerization in a suitable medium e.g. a ketone, an ester or an aromatic or aliphatic hydrocarbon solvent, is used, and a catalyst such as azodiisobutyric acid nitrile may be used. Lists of glycols and thioglycols from which the mixed esters may be prepared are given and the di- or poly-basic organic and inorganic acids mentioned are orthophosphoric, phosphorous, sulphuric oxalic and phosphinic acids. The polybasic acids may be further esterified e.g. with alkyl or aryl groups. Examples of monomers (4) are acrylic and methacrylic acid, acrylo- and methacrylonitrile, styrene, dibutyl maleate, vinyl acetate and unsaturated polyesters.  In the examples copolymers are formed from (1) ethyl acrylate, N-methylolmethacrylamide isobutyl ether, 2-methacryloxy -2- methyl-ethyl-phosphorous acid and vinyl acetate; (2) methylmethacrylate, vinyl acetate, ethyl acrylate, N-methylolmethacrylamide-isobutyl ether and 2-methacryloxy -2-chloromethyl-ethyl phosphorous acid; (3) ethyl acrylate, N-methylol methacrylamide-isobutyl ether, 2-methacryloxyethyl-phosphoric acid monomethyl ester and vinyl acetate; and (4) ethyl acrylate, N-methylolmethacrylamide-isobutyl ether, methacryloxyethyl-phenyl-phosphinic acid and vinyl acetate.ALSO:Coating compositions which may be applied for example to textiles, wood, paper, leather or metals are prepared by polymerizing a mixture comprising (1) one or more esters of acrylic and/or methacrylic acid having 1-20 carbon atoms in the alcohol moiety, (2) 1-30% by weight, based on the total monomer mixture, of a methylol compound and/or an alkyl ether thereof of acrylic and/or methacrylic acid amide, the alkyl residue of the said ether containing not more than 10 carbon atoms, (3) 0,1-10% by weight, based on the total monomer mixture, of a mixed ester of a diol or a monothiodiol esterified with acrylic or methacrylic acid and a di- or polybasic organic or inorganic acid having a pK value of less than 4, and (4) if desired, up to 20% by weight of the total monomer mixture, of one or more monomers copolymerizable with said monomers (1) to (3). Lists of glycols and thioglycols from which the mixed esters may be prepared are given and the di- or polybasic organic and inorganic acids mentioned are orthophosphoric, phosphorous, sulphuric, oxalic and phosphinic acids; the polybasic acids may be further esterified. Lists of monomers (4) are given.  In one example nylon fabrics are coated with a copolymer derived from ethyl acrylate, a 45% solution of N-methylol methacrylamide isobutyl ether is iso-butanol, 2-methacryloxy-2-methyl-ethyl-phosphorous acid and vinyl acetate.