Impact-resistant polyvinyl chloride based on ethylene-vinyl acetate and ethylene-alkyl acrylate copolymers
CA 1069643 A · Owner: Dynamit Nobel Aktiengesellschaft · Inventors: Blaschke, Franz; Buning, Robert; Trautvetter, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Impact - resistant polyvinyl chloride compositions based on ethylene - vinyl acetate or ethylene - alkyl acrylate copolymers. These are formed by a polymer mixture of (a) 4 to 15% by weight of a graft polymer, containing an ethylene copolymer with 2.5 to 15% by weight of copolymerised vinyl acetate or alkyl acrylate as the base polymer and 5 to 70% by weight of vinyl chloride grafted onto the copolymer in the gel phase (b) up to, 96% by weight of polyvinyl chloride and/or vinyl chloride copolymers and (c) conventional additives. The PVC compositions of the invention have improved U-notched impact strength; they are particularly suitable for use as weather-resisting materials.
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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.