Organo - polysiloxane compositions convertible into elastomers at room temperature

Abstract

Abstract NOVEL CROSS-LINKING AGENTS ARE DISCLOSED WHICH CAN BE COMBINED WITH PLASTICALLY SHAPABLE ORGANO-POLYSILOXANES; THE RESULTING NOVEL MIXTURES OR COMPOSITIONS BEING STORAGE STABLE UNDER EXCLUSION OF ALL MOISTURE. THE CROSSLINKING REACTION TAKES PLACE ON EXPOSURE OF THE COMPOSITIONS TO WATER, ATMOSPHERIC HUMIDITY SUFFICING, AT TEMPERATAURES BELOW 50*C. THE COMPOSITIONS ARE ESPECIALLY ADAPTED TO BE USED FOR THE FILLING OF JOINTS AND AS SEALING MATERIALS IN THE BUILDING INDUSTRY. THE ELASTOMERS RESULTING THEREFROM HAVE AN INCREASED ADHESION TO THE SUBSTRATE SAVING THE EXPENDITURE OF PRIMING. THE NOVEL COMPOSITIONS COMPRISE: (A) AN A,W-DIHYDROXY-POLY-(DIMETHYL-SILOXANE) WHICH, IN ADDITION TO ITS DIORGANO-SILOXANE UNITS, MAY CONTAIN UP TO 10 MOL-PERCENT OF SILOXANE UNITS HAVING THE FORMULA CH3SIO3/2, AND MAY BE ADMIXED WITH FILLERS AND AN A,W-BIS-(TRIMETHYL-SILOXY) - POLY - (DIMETHYL-SILOXANE); AND (B) A CROSS-LINKING AGENT HAVING THE FORMULA (RO-)3SI-CH(R'')-N(R")-R''" IN WHICH R IS AN ALKYL RADICAL WITH 1 TO 4 CARBON ATOMS; R'' IS A HYDROGEN ATOM, AN ALKYL RADICAL WITH 1 TO 6 CARBON ATOMS OR A PHENYL RADICAL; R" IS A HYDROGEN ATOM OR A METHYL RADICAL; AND R''" IS A HYDROGEN ATOM, AN ALKYL, CYCLOALKYL, AMINOALKYL, (METHYLAMINO)-ALKYL OR (DIMETHYLAMINO)-ALKYL RADICAL WITH 1 TO 6 CARBON ATOMS IN ITS ALKYL GROUP, OR A RADICAL HAVING THE FORMULA (RO-)3SICH(R'')-OR THE FORMULA (RO-)3SI-CH(R'')-N(R")-CH2CH

Inventors

• 👤 Hans Dietrich Golitz
• 👤 Peter Schwabe
• 👤 Walter Simmler

Bibliographic Details