Vinylidene chloride copolymer aqueous latex composition

DETAILED DESCRIPTION We claim: 1.
An aqueous latex composition comprising at least one copolymer A and at least one copolymer B, characterized in that A is an amorphous copolymer comprising polymerised units of vinylidene chloride and at least one internally plasticising comonomer; and which copolymer has a Tg in the range from -50 to <0.
degree.
C; and B is an amorphous copolymer comprising polymerised units of vinylidene chloride and at least one comonomer selected from alkyl acrylates and methacrylates having 1 to 12 carbon atoms in the alkyl group, alkoxyalkyl acrylates and methacrylates having 1 to 12 carbon atoms in the alkyl groups, styrene, acrylonitrile, vinyl acetate, and vinyl ethyl ether; and which copolymer has a Tg in the range 0.
degree.
to 30.
degree.
C.
; and wherein the dry weight ratio of the at least one copolymer A: the at least one copolymer B is from 95:5 to 10:90, and wherein said composition provides contactable layers after drying.
2.
An aqueous latex according to claim 1 characterised in that at least one of said at least one copolymer A in said composition comprises polymerised units of vinyl chloride.
3.
An aqueous latex composition according to either claim 1 or claim 2 characterised in that at least one of said at least one copolymer B in said composition comprises polymerised units of vinyl chloride.
4.
An aqueous latex composition according to any one of the preceding claims characterised in that at least one of said at least one copolymer A in said composition comprises polymerised units of at least one copolymerisable ethylenically unsaturated acid.
5.
An aqueous latex composition according to any one of the preceding claims characterised in that at least one of said at least one copolymer B in said composition comprises polymerised units of at least one copolymerisable ethylenically unsaturated acid.
6.
An aqueous latex composition according to any one of the preceding claims characterised in that the dry weight ratio of the at least one copolymer A: the at least one copolymer B is from 10:90 to 90:10