Polysiloxane sols method for the production and use thereof

Details Polysiloxane sols method for the production and use thereof Polysiloxane sols method for the production and use thereof

2007-02-13

2007-02-13

Peng, Kuo-Liang (Department: 1712)

Coating processes

With post-treatment of coating or coating material

Heating or drying

C528S038000, C528S032000

Reexamination Certificate

active

10498784

ABSTRACT:
Polysiloxane sols preparable by subjecting(1) in a first stage(A) a silicon compound of the general formula I:in-line-formulae description="In-line Formulae" end="lead"?(ZoL—)mSi(H)n(R)p,   (I)in-line-formulae description="In-line Formulae" end="tail"?which is free of carbamate groups and whereo is an integer from 1 to 5;m is 0, 1, 2 or 3;n is an integer from 1 to 4;p is 0, 1 , 2 or 3;Z is a reactive functional group, excluding carbamate group;L is an at least divalent, linking, organic group;H is a hydrolyzable, monovalent, organic group or hydrolyzable atom;R is a nonhydrolyzable, monovalent, organic group;to partial hydrolysis and condensation in the presence(B) of at least one crosslinking agent, and then subjecting(2) in a further stage, the reaction mixture (1) to complete hydrolysis and condensation with(C) a hydrolyzable, carbamate-functional silicon compound of the general formula II:in-line-formulae description="In-line Formulae" end="lead"?{[HR1N—(O)C—O—]rL—}sSi(H)t(R)u  (II)in-line-formulae description="In-line Formulae" end="tail"?whereR1is a hydrogen atom or group R;r is an integer from 1 to 5;s is 1, 2 or 3;t is 1, 2 or 3;u 0, 1 or 2;and their use as coating materials, adhesives, and sealing compounds and also for producing optical moldings and self-supporting films.

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