Polymeric thickeners and coatings containing same
US4464524A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 1983 |
| Grant date | Aug 7, 1984 |
| Priority date | — |
| Expiry date | Jul 26, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L33/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a latex thickener which consists essentially of the free radical addition product obtained by the emulsion polymerization of: PA1 (a) 3-15 parts styrene; PA1 (b) 15-45 parts ethyl acrylate; PA1 (c) 30-60 parts of at least one acid having the formula: ##STR1## wherein R.sub.1 and R.sub.2 can be the same or different and are hydrogen or lower alkyl of 1 to about 3 carbons; and PA1 (d) 10-25 parts of a mixture of esters; wherein the mixture of esters is the condensation reaction product of reactive amounts of (i) an ethylenically unsaturated cyclic carboxylic acid anhydride containing from 4 to about 8 carbon atoms; and (ii) an ethoxylated alcohol having the general formula: ##STR2## wherein R is from one to three aliphatic radicals of 1 to about 30 carbon atoms each and n is an integer from about 6 to 150; and (iii) a diol containing from about 2 to about 10 carbon atoms. The novel thickeners of this invention are especially useful in increasing the high shear viscosity of latex coating compositions, and especially coating compositions which contain polymeric vesiculated beads as part of the pigmentation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.