Propylene polymer composition

Abstract

Abstract PURPOSE:To provide the titled compsn. having excellent flame retardance and resistance to heat and thermal aging, by mixing a propylene polymer, a modified polyolefin, carbon black and surface-treated magnesium hydroxide in a specified ratio. CONSTITUTION:0.2-60pts.wt. carbon black (A) having a particle size of 0.01-1mu and a specific surface area of 20-1,000m<2>/g and 100-900pts.wt. magnesium hydroxide (B) having a particle size of 0.3-1mu treated with 1-10wt% epoxy resin are blended with 100pts.wt. mixture having an unsaturated carboxylic acid or anhydride content of 0.01-3wt%, consisting of 50-98wt% propylene polymer (C) having an MI of 1-100g/10min and 50-2wt% modified polyolefin (D) obtd. by grafting an unsaturated carboxylic acid or anhydride, e.g. maleic acid, onto a polyolefin having an MW of 20,000-1,000,000 with the proviso that the combined quantity of components A and B is 930pts.wt. or below.

Inventors

• 👤 Mitsuhiro Imaizumi
• 👤 光博 今泉
• 👤 Mikio Kobayashi
• 👤 未喜男 小林
• 👤 Kenji Takemura
• 👤 竹村　憲二

Bibliographic Details