Emulsion polymerized cohesive polymer latex useful as cold seal coating and improved sealable articles treated with the same
AssigneeMobil Oil Corporation
InventorsTaeik Min, Robert E. Touhsaent
Life of this patent
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Abstract
A cold sealable emulsion polymerized terpolymer cohesive formulation which has low surface tack characteristics, prepared from the emulsion polymerization of a first monomer selected from the group consisting of ethyl acrylate, hexyl acrylate, isooctyl acrylate, butyl acrylate, methyl acrylate and vinylidene chloride, a second monomer selected from the group consisting of vinyl acetate, methyl methacrylate, styrene, ethyl methacrylate and isobutyl methacrylate and a third monomer selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, sulfoethyl methacrylate and malic acid with the proviso that each of said first, second and third monomers are different.
Claims16
A coated or impregnated substrate which includes a cold sealable, emulsion polymerized cohesive terpolymer composition for coating or impregnating said substrate, said terpolymer consisting of:
- (a) from about 40 to about 75 percent by weight of a first monomer comprising ethyl acrylate;
- (b) from about 15 to about 50 percent by weight of a second monomer comprising vinyl acetate;
- and,
- (c) from about 0.1 to about 10 percent by weight of a third monomer comprising methacrylic acid,
- whereby said terpolymer coated or impregnated substrate having low tack characteristics, high crimp strength and is cohesive only to substrates which are coated or impregnated with said terpolymer when cold sealed under pressure.
A coated or impregnated substrate which includes a cold sealable, emulsion polymerized cohesive terpolymer composition for coating or impregnating said substrate, said terpolymer consisting of:
- (a) from about 40 to about 75 percent by weight of a first monomer selected from the group consisting of ethyl acrylate, hexyl acrylate, isooctyl acrylate, butyl acrylate, methyl acrylate, vinylidene chloride and mixtures thereof;
- (b) from about 15 to about 50 percent by weight of a second monomer selected from the group consisting of vinyl acetate, methyl methacrylate, styrene, ethyl methacrylate, isobutyl methacrylate and mixtures thereof;
- and,
- (c) from about 0.1 to about 10 percent by weight of a third monomer selected from the group consisting of methacrylic acid, acrylic acid, itaconic acid, sulfoethyl methacrylate, maleic acid and mixtures thereof, whereby said terpolymer coated or impregnated substrate having low tack characteristics, high crimp strength and is cohesive only to substrate which are coated or impregnated with said terpolymer when cold sealed under pressure.
Dependencies are inferred from the claim text.