method for preparing or ganosiloxanmengsels for use to create the file being rubberachti against fungi community masses, which can be stored.as to these mixtures containing rubber like objects.

摘要

1461435 Organosiloxane compositions BAYER AG 3 July 1974 [4 July 1973] 29485/74 Heading C3T An organopolysiloxane sealing composition convertible in the presence of water into a fungiresistant rubbery-elastic state comprises an ,#-dihydroxypolydiorganosiloxane; an aminosilane, oximatosilane, acyloxysilane or amidosilane as cross-linking agent; and from 1-20% wt., of one or more solvents selected from dioxane, acrylonitrile, acetonitrile, trichloroethylene, butanesultone, butyl acetate and carbon tetrachloride; and optionally up to 70% wt. of an ,#-bis(triorganosiloxy)polydiorganosiloxane, optionally up to 5% wt. of a tin compound or amine as cross-linking accelerant and optionally 10-70% wt. of inert filler, and optionally a conventional fungicide, the percentages being based on the weight of the total composition. Suitable cross-linking agents are methyltriacetoxy silane, methyl tributanoneoxime silane and di-(N-methylbenzamido)- methylethoxysilane. The composition may be in the form of a one or two component system. In Examples 1-6 compositions are prepared from ,# - dihydroxypolydimethylsiloxane (18,000 cP or 50,000 cP), ,#-bis(trimethylsiloxy) polydimethylsiloxane (1300 cP), TiO 2 , silica and either (1) dioxane, methyltriacetoxysilane, di - tert - butoxy - diacetoxy silane (adhesion promoter) and dibutyltin diacetate; or (2)dioxane,methyltributanone-oxime silane and dibutyl tin dilaurate or (3) dioxane, chalk, carbon black, di(N - methylbenzamido-)methylethoxysilane, diacetoacetic ester of diisobutyl titanate and dibutyltin-dilaurate; or (4) butanesultone, methyltriacetoxysilane and optionally dimethyl dioctadecyl ammonium chloride (fungicide), or (5) acetonitrile, butane sultone and methyltriacetoxysilane.