Thermoplastic polyester compositions containing certain low molecular weight diepoxide resins and having improved impact behavior
CA 1263977 C · Owner: Celanese Corporation · Inventors: Costanzo, Jerome L.; La Nieve, H. Leslie; Mcnally, Donal
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel thermoplastic polyester compositions having improved impact behavior are produced. These compositions comprise a blend of poly (C2-C4 alkylene terephthalate) with certain low molecular weight diepoxide resins having a molecular weight between about 350 and about 2,100 and consisting essentially of at least one condensation product of bisphenol A or brominated bisphenol A and epihalohydrin and represented by the general formula (I):, Formula (I), wherein X is bromine or hydrogen and n is an average number above zero and less than about 2.3, a triphenyl phosphonium halide catalyst, and a multiphase composite polymer. The multiphase polymer has a first elastomeric phase polymerized from …
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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 December 19, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 19, 2006.
- 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
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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.