Stabilized pvc products and their production

Details Stabilized pvc products and their production Stabilized pvc products and their production

C - Chemistry, Metallurgy

08

J

C08J 3/24 (2006.01) A01N 25/10 (2006.01) A61K 47/32 (2006.01) C08F 8/34 (2006.01) C08K 5/39 (2006.01)

Patent

CA 2051754

Abstract Crosslinked plasticized or unplasticized PVC products having gradient crosslinking density, with a high crosslinking density on the outer surface and a low or none crosslinking density at the bulk of the product, are prepared by immersing the PVC product in a hot water solution of a crosslinking material and a phase transfer catalyst. The products obtained provide controlled release of substances occluded within the PVC matrix, thus preventing leakage of plasticizers, stabilizers and other additives, and permitting controlled slow release of substances like pesticides, fertilizers, drugs and the like, into the surrounding environment.

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