Low shrinkage unsaturated polyester resin compositions
CA 1094723 A · Owner: Societa' Italiana Resine S.I.R. S.P.A. · Inventors: Vargiu, Silvio; Passalenti, Beppino; Brumat, Giorgio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Unsaturated polyester resin compositions comprising: (a) an unsaturated polyester resin, (b) from 5 to 15 parts by weight for each 100 parts by weight of polyester resin (a), of vinyl chloride polymer, and, (c) from 10 to 20 parts by weight for each 100 parts by weight of polyester resin (a), of an epoxy Novolak resin having an epoxy function higher than 2 or of, a mixture of the letter with a liquid epoxy resin in such amount that the average epoxy function of the mixture be higher than 2. These compositions hardenable by means of peroxides have low shrinkage values on hardening and yield hardened products having high resistance to bending and to heat.
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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 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 27, 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.