Patent ID: 6245840
Filing Date: 2001-06-12
Classification: C08K,C08L,Y10T

Abstract:
A film or sheet formed from a composition comprising 100 parts by weight of a polypropylene-based resin and from 0.01 to 5 parts by weight of a combination of the following compounds (E) and (F):(E) 2,2'-methylenebis{4-(1,1,3,3-tetramethylbutyl)-6-{(2H-benzotriazol-2-yl)ph enol}}, and(F) 2-{2-hydroxy-3,5-bis(.alpha.,.alpha.'-dimethylbenzyl)phenyl}-2H-benzotriaz ole;wherein the ratio by weight of the compound (E) to the compound (F) is between 1:9 and 9:1; andwherein the polypropylene-based resin comprises:(a) from 20 to 100% by weight of a propylene homopolymer and/or copolymer with at most 4% by weight of other olefin units, which has (i) a peak melting temperature (Tm) of 150.degree. C. or above as measured through differential scanning calorimetry (DSC), (ii) a tensile modulus of elasticity of from 200 to 700 MPa, (iii) a pentad fraction, rrrr/(1-mmmm).times.100, as measured through isotopic carbon nuclear magnetic resonance spectrometry (.sup.13 C-NMR) of from 20 to 60%, and (iv) a melting enthalpy (.DELTA.H) as measured through differential scanning calorimetry (DSC) of from 10 to 100 J/g, and(b) from 0 to 80% by weight of a propylene copolymer containing from 10 to 80% by weight of non-propylene olefin units.