Patent GB-1087999-A (GB)
Title: Fluorine-containing polymers
IPC: C08F10/00
Filed: 1965-11-01
Abstract: A terpolymer is obtained by contacting in an inert medium (1) tetrafluoroethylene, (2) from 0.50 to 1.50 mole per mole of tetrafluoroethylene of at least one aliphatic mono-olefinic hydrocarbon having 2 to 8 carbon atoms and a terminal ethylenically unsaturated group (3) from 0.05 to 0.50 mole per mole of tetrafluoroethylene of at least one polymerizable vinyl ester of an aromatic carboxylic acid, wherein the aromatic nucleus is derived from benzene or naphthalene, and (4) a free radical generating initiator, heating the reaction mixture to a temperature of from 50 DEG  to 160 DEG  C. while maintaining the reaction mixture under a pressure of from 100 to 10,000 p.s.i.g. and recovering the terpolymer from the reaction mixture.  The terpolymer may additionally contain from 0.005 to 0.2 moles per mole of tetrafluoroethylene of an ethylenically unsaturated acid having an acidity constant within the range of from 1.0 to 5.5 or an ester, a salt or an anhydride of such an acid, and/or from 0.05 to 0.30 moles per mole of tetrafluoroethylene of an olefinically unsaturated chloroolefin of 2 to 3 carbon atoms, a fluoroolefin of 2 to 3 carbon atoms, a chlorofluoroolefin of 2 to 3 carbon atoms, a vinyl ester of saturated alkane carboxylic acids of 2 to 18 carbon atoms, or an alkyl vinyl ether wherein the alkyl group contains from 1 to 6 carbon atoms. The examples describe copolymers of tetraluoroethylene/isobutylene/vinylbenzoate with bis(2-chloroethyl)vinyl phosphonate, itaconic acid, dineopentyl vinyl phosphonate, bis(2-chloropropyl) allylphosphonate, methacrylic acid, chlorotrifluoroethylene, dibutyl maleate, itaconic acid and vinyl butyrate, 2-ethoxyperfluoropropylene, CH2=CHC(CH3)3 and itaconic acid, vinyl 2:2-dimethyl undecanoate, vinyl butyrate and copolymers of tetrafluoroethylene/ethylene/vinylbenzoate with or without bis(2-chloroethyl)vinyl phosphonate, chlorotrifluoroethylene, a copolymer of tetrafluoroethylene/propylene/vinyl benzoate and acrylic acid and copolymers of tetrafluoroethylene/isobutylene with vinyl p-toluate and bis(2-chloroethyl)vinyl phosphonate, vinyl 5-chloro-2-hydroxy benzoate, vinyl benzoate and vinyl salicylate, vinyl o-chlorobenzoate and vinyl butyrate, vinyl 4-t.-butyl-benzoate and itaconic acid, vinyl a -naphthoate and bis(2-chloroethyl)vinyl phosphonate, vinyl o-chlorobenzoate. Conventional free radical catalysts and solvents are used. The terpolymers are used in coatings and laminates.  Compositions comprising the copolymers in various solvent mixtures are described. Various additives such as titanium dioxide, lampblack and green pigment may be added.ALSO:Wood, concrete, plastics, brick, asphalt, paper and metal substrates are coated with a copolymer comprising (1) tetrafluoroethylene (2) a mono-olefinic aliphatic hydrocarbon (3) a vinyl ester of an aromatic carboxylic acid and optionally (4) another copolymerzable monomer (see Div. C3).  Metals specified are iron, steel, aluminium, zinc, copper and brass and may be precoated, e.g. anodosed aluminium.  The copolymers may be applied from solution or by melt techniques. Conventional additives, e.g. pigments may be added.