Removable pressure-sensitive adhesive compositions comprising acrylic based emulsion polymers
CA 1331902 C · Owner: Bernard, Margaret · Inventors: Berman, Stanislav; Bernard, Margaret
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Invention A removable pressure sensitive adhesive composition comprises an acrylic-based emulsion of polymer having a gel content of from about 70% to about 90%. The polymer comprises about 90 to 99.5 parts alkyl acrylate monomers up to about 2 parts polar monomers and up to about one part of a multifunctional acrylate monomer. The polymer is synthesized in the presence of a combination of anionic and nonionic emulsifiers wherein the amount of anionic emulsifier exceeds the amount of nonionic emulsifier. The composition preferably comprises one or more adhesion stabilizers, preferably a plasticiser in an amount of up to about 3% by weight and a protective colloid in an …
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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 September 6, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 6, 2011.
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Timeline
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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.