Claims
- 1. Method of preparing water-borne colloidal dispersions of vinyl resins selected from the group consisting of vinyl chloride, vinylidene chloride or vinyl chloride/vinylidene chloride copolymers having carboxylic or sulfonic acid groups contained therein which comprises:
- (A) blending said resins with:
- (a) water;
- (b) water-miscible base;
- (c) at least one water-miscible organic solvent which is a good solvent for said resins and boils below about 160.degree. C.;
- (d) an organic and water-miscible cosolvent which is a poor solvent for said resins but is miscible with the organic solvent (c); and
- (e) about 1 to about 49 parts by weight of a water-immiscible organic diluent per hundred parts by weight of organic solvent (c) until a colloidal dispersion forms;
- (B) stripping off the colloidal dispersion until the total content of organic solvents (c) and (d) and diluent (e) of the colloidal dispersion is about 0.2 to about 20% by volume; and then
- (C) mixing an effective amount of an acrylic internally crosslinked rheology modifier with the colloidal dispersion from (B) until a stable, colloidal dispersion is obtained.
- 2. Method claimed in claim 1 wherein the vinyl resins are blended in step (A) with a stabilizing amount of a low molecular weight acrylic stabilizer copolymer of lower alkyl acrylates or methacrylates having 1 to about 4 carbons having copolymerized therein at least two monomers selected from the class consisting of styrene, hydroxyalkyl acrylates or methacrylates wherein the alkyl group contains 2 or 3 carbons, and acrylic or methacrylic acid.
- 3. Method of claim 2 wherein an anionic surfactant is incorporated into the components of step (A).
Parent Case Info
This is a continuation-in-part of U.S. patent application Ser. No. 104,070, filed Dec. 17, 1979 now abandoned.
US Referenced Citations (11)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
104070 |
Dec 1979 |
|