Manufacture of fibrids of polyolefins
CA 1069265 A · Owner: Basf Aktiengesellschaft · Inventors: Scherling, Kurt; Sander, Bruno; Bonitz, Eckhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the manufacture of discrete, non-agglomerated fibrids of an alefin polymer having at 25°C and X-ray crystallinity of more than 5% w/w, said fibrids having a high degree of fibrillation and a high specific surface area, being not agglomerating on evaporation of solvent therefrom, having substantially no shrinkage when left in air, and capable of being freed from solvents and precipitants in the absence of surfactants and antifoaming agents and without solvent exchange. Said process comprises (a) dissolving 0.5 to 30% w/w of said olefin polymer in a solvent which is pentane or a solvent mixture containing at least sufficient pentane 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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.