Organo(poly)siloxanes containing terminal siloxane units...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 77/18 (2006.01) C08G 77/12 (2006.01) C08K 5/54 (2006.01) C08L 83/04 (2006.01) C08L 83/06 (2006.01)

Patent

CA 2081447

Organo(poly)siloxanes with siloxane units at the end of the chain having organyloxy and hydrogen groups are disclosed, as well as a process for producing the same by reacting .alpha., w-dihydroxyorgano(poly)siloxanes with silanes having a group that can be easily separated and their use in oxgano(poly)siloxane mixtures that can be stocked in the absence of water but which can be cross-linked into elastomers, with alcohol separation, already at ambient temperature, when water is added. A process is also disclosed for producing organopolysiloxane elastomers by cross-linking cross-linkable mixtures by addition of Si-linked hydrogen to SiC-linked residues with aliphatic carbon-carbon multiple linkage.

n présente des organo(poly)siloxanes à unités siloxane en fin de la chaîne, à groupes organyloxy et à hydrogène, ainsi qu'un procédé pour leur production par la réaction d'alpha, oméga-dihydroxyorgano(poly)siloxanes avec des silanes ayant un groupe facilement séparable, et leur utilisation dans des mélanges d'organo(poly)siloxane pouvant être stockés en l'absence d'eau mais qui peuvent être réticulés en élastomères, avec séparation d'alcool, même à la température ambiante quand on ajoute de l'eau. On divulgue aussi un procédé pour la production d'élastomères de type organopolysiloxane par réticulisation de mélanges réticulisables par addition d'hydrogènes de type Si-H à des résidus de type Si-C à liens aliphatiques multiples carbone-carbone.

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