| 摘要 |
A composition containing (1) a crystalline polypropylene resin and (2) one o r more .szlig.-nucleating agents of the formula (I), wherein R1, R2 and R3, independently of one another, are C1-C20alkyl, C2-Calkyl substituted by C1- C,1oalkylamino, di(C1-C1oalkyl)amino, C1-Cloalkyloxy or hydroxy; C3- C2oalkenyl, C5-C12cycloalkyl, C5-C12Cycloalkyl substituted by 1, 2 or 3 C1- C10alkyl; cyclohexylmethyl; cyclohexylmethyl substituted by 1, 2 or 3 C1- C1oalkyl; C5-C9cycloalkenyl, C5-C9cycloalkenyl substituted by 1, 2 or 3 C1- C10alkyl; phenyl substituted by 1, 2 or 3 radicals selected from the group consisting of C1-C10-oalkyl, C1-C10alkyloxy, hydroxy, halogen, trihalogenmethyl, trihalogenmethoxy, benzoyl, phenylamino, acylamino and phenylazo; C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl by 1, 2 or 3 radicals selected from the group consisting of C1- Cloalkyl, C1-C10alkoxy and hydroxy; naphthyl, naphthyl substituted by C1C1oalkyl, adamantyl, or a 5 to 6 membered heterocyclic group; characterize d in that the polypropylene resin has a content of .szlig.-form crystals of at least 10 % calculated by means of the following equation .szlig.-form crysta l content (%) = 100 x P.szlig.1,/(Pa1 + Pa2 + Pa3 + P.szlig.1) where Pa1 to Pa 3 are respective peak heights (maxima) of the a-form and P.szlig.1 is a peak height (maximum) of the .szlig.-form determined by wide angle X-ray scatteri ng.
|
