Solubilized acrylic polymers and carpet shampoos containing the same
CA 1100379 A · Owner: Rohm And Haas Company · Inventors: Kirn, William A.; Gehman, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
As a modifier for carpet shampoos and the like an aqueous composition containing a polymer component comprising an aqueous dispersion of an acrylic polymer polyvalent metal ions, ammonia or a volatile amine to solubilize the copolymer, and optionally CO3? HCO3?, or an anion of an amino acid. The acrylic polymer is a low molecular weight copolymer of 20-60 parts butyl acrylate, 0-25 parts styrene, 0-15 parts methyl methacrylate, and 40-60 parts of at least one of methacrylic acid, acrylic acid, and itaconic acid. Preferably the polymer contains at least about 5 parts of styrene, the styrene:butyl acrylate ratio being no more than 1:1. The pka of the polymer component is less than about 6.7 …
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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 5, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.