Methacrylic acid emulsion copolymers for thickening purposes
CA 1188043 A · Owner: Rohm And Haas Company · Inventors: Chang, Ching-Jen; Stevens, Travis E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stable, aqueous dispersions of water-insoluble methacrylic acid emulsion copolymers of (1) about 20 to 50% by weight of at least one member selected from the group consisting of methacrylic acid and acrylic acid (2) about 0.5 to 25 weight percent of a (meth)acrylate of the formula R°-O-(EO)n-C(O)-C(R)=CH2 wherein R° is a member selected from the group consisting of alkyl alkylaryl, and polycyclic alkyl groups having 8 to 30 or more carbon atoms, E is -CH2CH2-, R is H or CH3 and n is an integer having a value of at least 2 and (3), at least 30 weight percent, to make 100% of at least, one alkyl (meth)acrylate wherein the alkyl group has 1-4 carbon atoms. Optionally, a small amount 0.05 to …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 28, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 2002.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.