Terephthalate ester copolymers and their use in laundry compositions
CA 1297625 C · Owner: The Procter & Gamble Company · Inventors: Gosselink, Eugene P.; Diehl, Francis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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Abstract, Terephthalate ester copolymer useful as soil release agent in detergent and fabric conditioning compositions and articles. The copolymer has the general formula, Z-(T-PO)u(T-PEG)v-T-Z1 I wherein Z and Z1 are chain terminating moieties having the empirical formula II, (PEG1-x)a(PO-H)b(PEG-H)c II wherein PEG and PEG1 are identical or different poly(oxyethylene)oxy moieties each having a molecular weight in the range from about 300 to about 6000; X is C1-C4 alkyl or acyl containing from 1 to 4 carbon atoms in the alkyl moiety; T is a terephthaloyl moiety; PO is oxypropyleneosy; u is from about 0.5 to about 50; v is from about 0.05 to about 20; a is from about 0.2 to about 0.95; b is …
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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.