Process for the manufacture of modified polymers and their utilization
CA 1097835 A · Owner: Chemische Fabrik Pfersee G.M.B.H. · Inventors: Deiner, Hans; Sandner, Bernhard; Bernheim, Willy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of modified polymers preferably as, solutions in organic solvents by polymerisation of, Ia) 70 to 99.9 parts by weight of acrylic and/or methacrylic esters Ib) 0.1 to 20 parts by weight of .omega. -hydroxyalkyl esters of acrylic methacrylic, maleic and/or fumaric esters the said dicarboxylic acids being, optionally esterified on the second carboxylic group with an alcohol of from 1 to 12 C-atoms and, Ic) 0 to 10 parts by weight of other unsaturated monomers the sum, of (Ia), (Ib) and (Ic) amounting to 100 parts by weight in the presence of, II) 5 to 40 parts by weight of terminal blocked alkyl-hydrogen polysiloxanes. Organic solvents containing the obtained …
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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, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 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.