Glass fiber reinforced vinyl chloride polymer products and process for their preparation
CA 1296451 C · Owner: Polyone Corporation · Inventors: Rahrig, Douglas Bruce; Magistro, Angelo Joseph; Parker, Richard Ghrist
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vinyl chloride (VC) resins, particularly poly(vinyl chloride) (PVC) and chlorinated poly(vinyl chloride) (CPVC) are reinforced with glass fibers which have been sized with a particular aminosilane coupling agent and a particularly chracterized basic film former. At the processing temperature of VC resin, containing a stabilizer against degradation during thermoforming for example in, an extruder, or on a mixing mill used to blend the resin with sized glass fibers, a reaction occurs between an aminosilane coupling agent and the VC resin which reaction involves C=C bonds in the homopolymer, provided the polymer film former in the size is more basic than poly(vinyl acetate) ("PVA"). The film …
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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 February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.