申请人:Mitsui Chemicals, Inc.
公开号:EP1580230A2
公开(公告)日:2005-09-28
A polypropylene resin composition comprises (A) (a-1) a specific crystalline propylene/ethylene block copolymer or (a-3) a polymer mixture comprising the (a-1) and (a-2) a specific crystalline propylene homopolymer in specific ratio, in an amount of 5 to 56% by weight, (B) a hydroxyl group-containing polypropylene having an intrinsic viscosity [η] of 0.8 to 2.0 dl/g and a melting point of 150 to 168°C, in an amount of 10 to 45% by weight, (C) a copolymer rubber of ethylene and an α-olefin having a melt flow rate (ASTM D-1238, 230°C, load of 2160 g) of 0.5 to 15 g/10 min, in an amount of 18 to 25% by weight, (D) a hydrogenation product of a block copolymer containing a polymer block of a monovinyl-substituted aromatic hydrocarbon compound and a polymer block of a conjugated diene compound, in an amount of 1 to 10% by weight, and (E) an inorganic filler in an amount of 15 to 25% by weight, the total amount of said components (A), (B), (C), (D) and (E) being 100% by weight, hydroxyl group-containing monomer units derived from the hydroxyl group-containing polypropylene (B) being contained in amounts of 1.3 to 4.0% by weight in 100% by weight of the polypropylene resin composition. The polypropylene resin composition exhibits excellent coating adhesion properties and has excellent processability and mechanical strength with a good balance.
一种聚丙烯树脂组合物包括(A)(a-1)特定结晶丙烯/乙烯嵌段共聚物或(a-3)由(a-1)和(a-2)特定结晶丙烯均聚物按特定比例组成的聚合物混合物,其用量为5%至56%(重量);(B)含羟基的聚丙烯,其固有粘度[η]为0.8 至 2.0 dl/g,熔点为 150 至 168°C,用量为 10 至 45%(以重量计), (C) 乙烯和α-烯烃的共聚橡胶,其熔体流动速率(ASTM D-1238,230°C,载荷 2160 克)为 0.(D) 含有单乙烯基取代芳香烃化合物聚合物嵌段和共轭二烯化合物聚合物嵌段的嵌段共聚 物的氢化产物,其用量为 1-10%(重量百分比)、(E) 无机填料,其用量为 15%至 25%(按重量计),所述组分(A)、(B)、(C)、(D) 和(E)的总用量为 100%(按重量计),从含羟基聚丙烯(B)衍生的含羟基单体单元的用量为 1.3 至 4.0%(按聚丙烯树脂组合物 100%重量计)。这种聚丙烯树脂组合物具有优异的涂层附着性,并具有良好的加工性和机械强度。