Heteropolymer acrylic latices and textiles treated therewith
AssigneeRohm and Haas Company
InventorsJoseph E. Plamondon, William R. Wilber, Stephen Goth
Life of this patent
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Abstract
Low temperature properties of resin-treated textiles are improved by using as the resin an acrylic emulsion polymer wherein the latex particles have a core-shell structure. The monomers forming the core are selected to provide a T.sub.g in the core of -20.degree. C. or lower and the monomer composition forming the shell is selected to provide a T.sub.g in the shell of about 60.degree. C. to about -10.degree. C. The core monomer composition contains a latent crosslinker together with an active crosslinker or a graftlinker, and the shell monomer composition contains a latent crosslinker.
Claims7
A textile treating composition consisting essentially of an acrylic latex, the particles of which comprise about 30-60% by weight of a polymeric core and about 70-40% by weight of a polymeric shell, wherein said core is formed by emulsion polymerization of a first monomer composition consisting essentially of:
- (a) a major amount of a principal monomer system, and
- (b) a minor amount of a crosslinking monomer system comprising:
- (i) about 0.5% to 6% by weight on the total first monomer composition of a graftlinking monomer or an active crosslinking monomer, and
- (ii) about 4% to 10% by weight on the total first monomer composition of a latent crosslinking monomer;
- and wherein said shell is formed on said core by emulsion polymerization of a second monomer composition in the presence of said core, said second monomer composition consisting essentially of:
- (a) a major amount of a principal monomer system;
- and
- (b) about 2% to 10% on the total second monomer composition of a latent crosslinking monomer;
- the monomers of said first monomer composition being selected to provide a T.sub.g in said core of -20.degree. C. or lower, and the monomers of said second monomer composition being selected to provide a T.sub.g in said shell of about 60.degree. C. to about -10.degree. C.
Dependencies are inferred from the claim text.