| 摘要 |
1,181,425. Propylene polymer compositions. TURNER BROS. ASBESTOS CO. Ltd. 4 Oct., 1968 [12 Oct., 1967], No. 46668/67. Heading C3P. Compositions comprise a propylene polymer, chrysotile asbestos fibre and an antioxidant system comprising a phenolic compound and a compound containing the group. Specified nitrogen compounds are dicyandiamide, melamine, guanidine and derivatives. The phenol may be 4,4<SP>1</SP>-butylidene bis- (6-t.-butyl m-cresol) or 4,4<SP>1</SP>-methylene bis-(2,6- di-t.-butyl phenol). The compositions may also contain synergistically acting sulphur compounds, e.g. dilauryl and distearyl thiodipropionates; and conventional fillers and pigments, e.g. talc, french chalk, slate flour, pyrites and silica. The asbestos fibres may be pretreated with a water-insoluble soap, e.g. calcium stearate, silicone fluid, organic silicate such as ethyl or isopropyl silicate, chlorosilane, alkoxysilane or isocyanate such as toluene diisocyanate. |
