Heat-curable epoxy compositions and their use in preparing formed articles
CA 1205250 A · Owner: Shell Canada Limited · Inventors: Brownscombe, Thomas F.; De La Mare, Harold E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heat-curable compositions suitable for use in reaction injection moulding processes comprise:, (1) an epoxy compound having on average more than one epoxy group per molecule;, (2) an amino compound containing at least three amino hydrogen atoms per molecule, as curing agent. (3) a Group I or II metal salt as catalyst, and, (4) a polyalkylene ether glycol. An ethylenically unsaturated monomer and a peroxide free-radical initiator may also be present. The compositions may be moulded and cured by application of heat to produce formed articles.
Read the whole patent
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 May 27, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 2003.
- 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.