Polyvinyl chloride composition

Details Polyvinyl chloride composition Polyvinyl chloride composition

Category

C - Chemistry, Metallurgy

Subcategory

08

Subsubcategory

L

CPC

400/4012, 400/50

IPC codes

C08L 27/06 (2006.01) C08K 3/22 (2006.01) C08K 5/58 (2006.01)

Type

Patent

Patent number

CA 2021009

Description

An improved unplasticized polyvinyl chloride composition for forming articles for exterior use such as house siding and window profiles includes a polymeric organic impact modifier, at least one thermal dehydrochlorination stabilizer, and an ultraviolet stabilization system. The ultraviolet stabilization system includes from about 0.2 - 15 parts by weight of the polyvinyl chloride resin of rutile titanium dioxide and less than about 5 parts by weight of the polyvinyl chloride resin of magnesium oxide. Inclusion of magnesium oxide in the unplasticized polyvinyl chloride composition permits the extrusion of ultraviolet resistant sid- ing and window profiles including relatively low levels of titanium dioxide.

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