Adhesive compositions containing low molecular weight polyphenylene oxides
CA 2056374 A1 · Owner: Exxon Chemical Patents, Inc. · Inventors: Audett, Jay D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2056374 9014396 PCTABScor01, Pressure sensitive and hot melt adhesive compositions having improved shear adhesion failure temperatures (SAFT) comprising: (a) a block copolymer having at least two monoalkenyl arene polymer endblocks (A) and at least one elastomeric conjugated-diene midblock (B), said blocks (A) comprising 8-55 % by weight of the block copolymer; (b) about 50 to about 200 phr of a tackifying resin compatible with block (B); and (c) about 5 to about 50 phr of a low molecular weight polyphenylene oxide polymer wherein the molecular weight (Mvis) of the polyphenylene oxide polymer is from about 1,000 to about 5,000, the Tg is from about 100· to about 165·C, preferably between …
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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
- Filed May 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 23, 2012.
- 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.