Process for the preparation of fibre-reinforced polyvinyl chloride composites
CA 1284568 C · Owner: Coleman-Kammula, Seetha · Inventors: Coleman-Kammula, Seetha; Van Deursen, Josephus Hubertus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of reinforced polyvinyl chloride (PVC) composites containing PVC-grafted cellulose fibre material as reinforcing component, which comprises:, Step A - grafting vinyl chloride onto a cellulose fibre material by polymerization in an aqueous medium in the presence of a, polymerization initiator based on a metal which complexes to hydroxyl and/or, 1,2-dihydroxy groups thus providing a, reaction product which is essentially a mixture of PVC-grafted cellulose fibre material and PVC homopolymer, Step B - isolating the reaction product from the aqueous medium as under Step A, and, Step C - employing the isolated reaction product as under Step B to prepare a composite …
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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 June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2008.
- 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.