| 摘要 |
The invention relates to single-component silicon compositions which are storage stable in the absence of humidity and which, by means of polycondensation reactions that are catalysed by a mixed titanium/metal catalyst, crosslink to form non-yellowing elastomers that adhere to different supports, said reactions taking place at ambient temperature and in the presence of water. Each single-component POS composition comprises: 100 parts by weight linear diorganopolysiloxane(s) A which are functionalised at the chain ends by alkoxy-, acyloxy-, iminoxy-, enoxy-type functions R<fo>; between 0 and 30 parts by weight polysiloxane resin(s) B; between 0 and 15 parts by weight crosslinking agent(s) C; between 0 and 2 parts by weight aliphatic alcohol(s) E; between 0 and 30 parts by weight unfunctionalised, unreactive linear diorganopolysiloxane(s) F; between 2 and 40 parts by weight mineral filler G; between 0 and 20 parts by weight auxiliary agent(s) H; and between 1 and 150 ñat.g (microgram atom) metals M1 + M2 per 1g of single-component POS composition, wherein M1 is selected from among titanium, zirconium and mixtures of same, and M2 is selected from among zinc, aluminium, borium, bismuth and mixtures of same. |
