Terminating post cure with amino acid esters

Details Terminating post cure with amino acid esters Terminating post cure with amino acid esters

1997-11-05

1999-11-02

Glass Moore, Margaret W.

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

Synthetic resins

From silicon reactant having at least one...

528 31, 528 25, 524731, 524862, 424401, 424405, 424 7012, 424 768, 424 761, 424 65, 424 63, 424 64, 523122, 174 1, 174137B, 106900, C08G 7708

Patent

active

059772808

ABSTRACT:
A method of thickening solvents involves reacting (A) an .ident.Si--H containing polysiloxane with (B) an alkene such as an alpha, omega-diene; conducting the reaction in the presence of a platinum catalyst and (C) a solvent; continuing the reaction until a gel is formed by crosslinking and addition of .ident.Si--H across double bonds in the alpha, omega-diene; adding additional solvent and a post cure terminating agent to the gel; and subjecting the solvent, the post cure terminating agent, and the gel to shear force until a paste is formed. The post cure terminating agent is an amino acid ester, preferably a sulfur containing amino acid ester, such as methionine methyl ester, methionine ethyl ester, cysteine methyl ester, cysteine ethyl ester, and cystine dimethyl ester.

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