PVC COMPOSITION, POLYMER COMPOSITE ARTICLE FORMED THEREWITH, AND METHOD OF PREPARING SAME

    公开(公告)号:US20220275188A1

    公开(公告)日:2022-09-01

    申请号:US17630282

    申请日:2020-08-06

    IPC分类号: C08L27/06 C08L83/04

    摘要: A polyvinyl chloride (PVC) composition and a method for preparing a polymer composite article. The composition comprises (A) a mineral filler in an amount of from 7.5 to 75 wt. %. The composition also comprises (B) a polyvinyl chloride polymer in an amount of from 20 to 92 wt. %. Further, the composition comprises (C) a polydiorganosiloxane in an amount of from greater than 0 to 5 wt. %; the (C) polydiorganosiloxane being a compound of formula (I): where each R is an independently selected monovalent hydrocarbon group of 1 to 18 carbon atoms that is free of aliphatic unsaturation, and subscript x has a value sufficient to give the (C) polydiorganosiloxane a viscosity of greater than 350 mPa·s to 100,000 mPa·s measured at 25° C. at 0.1 RPM to 50 RPM on a Brookfield DV-III cone & plate viscometer with #CP-52 spindle. The ranges for components (A)-(C) are based on the total weight of components (A), (B) and (C) in the composition.

    PVC COMPOSITION, POLYMER COMPOSITE ARTICLE FORMED THEREWITH, AND METHOD OF PREPARING SAME

    公开(公告)号:US20220275189A1

    公开(公告)日:2022-09-01

    申请号:US17630312

    申请日:2020-08-06

    IPC分类号: C08L27/06

    摘要: A polyvinyl chloride (PVC) composition and a method for preparing a polymer composite article. The composition comprises (A) a mineral filler in an amount of from 7.5 to 75 wt. %. The composition also comprises (B) a polyvinyl chloride polymer in an amount of from 20 to 92 wt. %. Further, the composition comprises (C) a polydiorganosiloxane in an amount of from greater than 0 to 5 wt. %; the (C) polydiorganosiloxane being a compound of unit formula: (R2R′SiO1/2)a(R3SiO1/2)b(R2SiO2/2)c(RR′SiO2/2)d, where each R is an independently selected monovalent hydrocarbon group of 1 to 18 carbon atoms that is free of aliphatic unsaturation, each R′ is an independently selected alkenyl group of 2 to 18 carbon atoms, subscript a is 0 to 2, subscript b is 0 to 2, a quantity (a+b)=2, subscript c≥0, subscript d≥0, a quantity (a+d)≥1, and a quantity (a+b+c+d) is sufficient to give the polydiorganosiloxane a viscosity of 2,000 mPa·s to 60,000 mPa·s at 25° C. measured at 0.1 to 50 RPM on a Brookfield DV-III cone & plate viscometer with #CP-52 spindle. The ranges for components (A)-(C) are based on the total weight of components (A), (B) and (C) in the composition.