High solids content vinylidene chloride polymer dispersions in strongly hydrogen bonded dispersing media and process of preparation thereof

Claim 2

DISPERSIONS OF NORMALLY CRYSTALLINE VINYLIDENE CHLORIDE POLYMERS CONTAINING FROM ABOUT 70 TO 95 PERCENT BY WEIGHT OF VINYLIDENE CHLORIDE IN A STRONGLY HYDROGEN BONDED DISPERSING MEDIA SAID DISPERSIONS CONTAINING ABOUT 0.1 TO 20 PERCENT BASED ON POLYMER SOLIDS OF A DISPERSION STABILIZER CONSISTING ESSENTIALLY OF THE REACTION PRODUCT OF (A) TRIPROPYLENE GLYCOL METHYLETHER ACRYLATE AND (B) AT LEAST ONE REACTIVE COMONOMER CAPABLE OF FORMING A SIDE CHAIN ON SAID STABILIZER WHICH SIDE CHAIN IS INSOLUBLE IN THE HYDROPHILIC LIQUID AND ASSOCIATED WITH SAID VINYLIDENE CHLORIDE OF (A) TO (B) IS FROM ABOUT 99:1 TO 80:20.

Claim 3

The dispersions of claim 1 wherein said strongly hydrogen bonded dispersing media contains at least about 65 percent by weight of an aliphatic alcohol containing from about 1 to 4 carbon atoms.

Claim 4

The dispersions of claim 2 wherein said dispersion contains from about 60 to 70 percent by weight of polymer solids.

Claim 5

The dispersions of claim 3 wherein said normally crystalline vinylidene chloride polymer contains from about 80 to 90 parts by weight of vinylidene chloride with the remainder being selected from the group consisting of acrylonitrile, methyl acrylate, ethyl acrylate acid, hydroxy ethyl acrylate and mixtures thereof.

Claim 6

The dispersions of claim 4 wherein said normally crystalline vinylidene chloride polymer is an interpolymer of about 80 parts by weight vinylidene chloride, about 10 parts by weight acrylonitrile and about 10 parts by weight of hydroxy ethyl acrylate.

Claim 7

In the process of preparing a nonaqueous dispersion of individual particles of a normally crystalline vinylidene chloride polymer containing from about 70 to 95 percent by weight of vinylidene chloride which process comprises polymerizing the monomeric constituents of said polymer in a nonaqueous dispersing media in the presence of a preformed dispersion stabilizer, the improvement consisting of (1) using as said nonaqueous dispersing media a strongly hydrogen bonded dispersing media and (2) utilizing as said preformed dispersion stabilizer a polymeric material consisting essentially of the reaction product of (A) tripropylene glycol methylether acrylate and (B) at least one reactive comonomer capable of forming a side chain on said stabilizer which side chain is dispersible in said vinylidene chloride polymer and wherein the mass ratio of (A) to (B) is from about 99:1 to 80:20.

Claim 8

In the process of preparing a nonaqueous dispersion of individual particles of a normally crystalline vinylidene chloride polymer containing from about 70 to 95 percent by weight of vinylidene chloride which process comprises polymerizing the monomeric constituents of said polymer in a nonaqueous dispersing media in the presence of a preformed dispersion stabilizer, the improvement consisting of (1) using as said nonaqueous dispersing media a strongly hydrogen bonded dispersing media and (2) utilizing as said preformed dispersion stabilizer a polymeric material consisting essentially of the reaction product of (A) tripropylene glycol methylether acrylate and (B) at least one reactive comonomer capable of forming a side chain on said stabilizer which side chain is dispersible in said vinylidene chloride polymer and wherein the mass ratio of (A) to (B) is from about 99:1 to 80:20.

Claim 9

The process of claim 6 wherein said strongly hydrogen bonded dispersing media contains at least about 65 percent by weight of an aliphatic alcohol containing from about 1 to 4 carbon atoms.

Claim 10

The process of claim 7 wherein said dispersion contains from about 60 to 70 percent by weight of polymer solids.

Claim 11

The process of claim 8 wherein said normally crystalline vinylidene chloride polymer contains from about 80 to 90 parts by weight of vinylidene chloride with the remainder being selected from the group consIsting of acrylonitrile, methyl acrylate, ethyl acrylate, acrylic acid, hydroxy ethyl acrylate and mixtures thereof.

Claim 12

The process of claim 9 wherein said normally crystalline vinylidene chloride polymer is an interpolymer of about 80 parts by weight vinylidene chloride, about 10 parts by weight acrylonitrile and about 10 parts by weight of hydroxy ethyl acrylate.