| 摘要 |
1,140,537. Silicone-carnauba wax copolymers. DOW CORNING CORP. 28 Feb., 1966 [29 March, 1965], No. 8710/66. Headings C3S and C3T. [Also in Division C5] A silicone-carnauba wax copolymer consists essentially of a silicone-containing portion bonded to a carnauba wax portion through an organic radical attached to a Si atom via a Si-C bond, the organic radical being an ether radical. The silicone portion may constitute 5- 70% by wt. of the copolymer. The copolymers are best made by mixing molten carnauba wax with an epoxy-silicone in the presence of a catalyst, e.g. a t-amine, quaternary ammonium hydroxide, alkalihydroxide or a Lewis acid, and preferably in an organic solvent. The epoxy-silicone may be a silane or siloxane containing a Si-bonded radical, where R is a divalent hydrocarbon (h.c.), halo-h.c. or ether radical, and Y is a h.c. radical with or without halogen or hydroxyl substituents, the other valencies of Si being satisfied with H atoms or monovalent h.c. or halo-h.c. radicals, and the silanes may also contain Si-bonded halogen atoms or hydrocarbonoxy radicals with or without halo- or ether substituents. The siloxanes may also be copolymers containing from 0.001 to 99.999 mol. per cent of conventional siloxane units. In a typical Example (1) molten carnauba wax was reacted with in the presence of BF 3 .CH 3 CH 2 OCH 2 CH 3 to yield a tough wax melting at 82‹ C. Example (5), the product of Example (4) was dissolved in ethylene glycol dimethylether and added to an hydroxy-terminated dimethylpolysiloxane liquid containing sodium acetate, and warmed, to distil off methanol and solvent, to yield a soft creamy wax. Uses.-In cosmetic compositions such as lipsticks; in leather balm, shoe polish, car polish, floor wax and furniture waxes and polishes and in release agents. |
