Reinforced composites containing a friedel-crafts resin
CA 1106992 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Green, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fibrous-reinforced composites such as prepregs and, sheet moulding compounds are made with a thermosettable, Friedel-Crafts resin a heat-curing agent therefor, and a, photopolymerisable compound. The Friedel-Crafts resins employed are those obtainable by a Friedel-Crafts reaction of certain aralkyl alkyl ethers and/or certain aralkyl halides with phenolic compounds. The heat-curing agents employed are those used to cure novolac resins and include, formaldehyde in various forms sources of formaldehyde, and, also epoxide resins. Fibers may be impregnated with a liquid mixture of the resin, heat-curing agent and the photopolymerisable, compound, and exposed to actinic radiation to cause the …
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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 August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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.