Process for the preparation of organosilicon compounds...

Details Process for the preparation of organosilicon compounds... Process for the preparation of organosilicon compounds...

2007-05-03

2010-11-30

Moore, Margaret G (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From silicon reactant having at least one...

C528S025000, C528S026000, C528S038000, C528S034000, C524S588000, C524S838000

Reexamination Certificate

active

07842773

ABSTRACT:
Organosilicon compounds containing urethane groups are prepared by reacting aminofunctional organosilicon compounds containing at least one siloxane unitARa⁢SiO3-a2(I)per molecule and at least two siloxane units of the formulaXRb⁢SiO3-b2(II)in which R are monovalent, optionally substituted C1-18hydrocarbon radicals,A is a radicalin-line-formulae description="In-line Formulae" end="lead"?—R1(—NR2—R1)z—NR2—H  (III),in-line-formulae description="In-line Formulae" end="tail"?where R1is a divalent C1-18organic radical, R2is a hydrogen atom or C1-18hydrocarbon radical, X is a group capable of condensation, a is 0 or 1, b is 1 or 2, z is 0 or an integer from 1 to 10, are reacted with organic carbonates (2) containing a group of the formulain-line-formulae description="In-line Formulae" end="lead"?—O—C(═O)O—  (IV),in-line-formulae description="In-line Formulae" end="tail"?and, in a second stage, the first stage reaction products are optionally condensed with silanes (3) bearing groups capable of condensation, to give higher molecular weight organosilicon compounds containing urethane groups.

REFERENCES:
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patent: 2004/0110659 (2004-06-01), Herault et al.
patent: 19756454 (1999-06-01), None
patent: 0490402 (1992-06-01), None
English Abstract for EP0490402A2.

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