Unsaturated hydantoin coagents
CA 1100509 A · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Zussman, Hyman W.; Knell, Martin; Dexter, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Unsaturated hydantoin derivatives of the formula or , where R1 and R2 are for example alkyl R3 is vinyl, allyl, alkylene, substituted alkylene or polyvalent aralkyl R4 is vinyl or allyl and n, is 1 to 3, with the proviso that when n is 1, R3 and R4 cannot both, be vinyl are coagents for curing polymeric compositions to improve their physical, chemical and electrical properties. These coagents are particularly useful in crosslinking PVC polyethylene, chlorinated, polyethylene and poly(ethylene/vinyl acetate) compositions.
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 5, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 5, 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.