Internal mold release agents, their use for preparing molded articles using polyisocyanate-addition polymerization, and a process for preparing molded articles
CA 1298040 C · Owner: Horn, Peter · Inventors: Schmidt, Hans Ulrich; Horn, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Disclosed are internal mold release agents for the preparation of molded articles using polyisocyanate addition polymerization, which are comprised of: A) at least one ketimine, aldimine, enamine cyclic Schiff, base or a mixture of at least two of said compounds; B) at least one metal salt of an organic carboxylic acid having from 8 to 24 carbon atoms; and, C) optionally including at least one carboxylic acid organic, sulphonic acid, mineral acid, or amidosulphonic acid and, their use in preparing molded articles comprised of polyurethane-plastics, polyurea-plastics polyurethane-, polyurea-plastics, polyurethane-polyurea-polyamide-plastics, or …
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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 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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
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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.