Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1981-09-18
1983-01-11
Marquis, Melvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 19, 528 20, 528 23, 524357, C08G 7706
Patent
active
043683134
ABSTRACT:
A method for stabilizing silanol hydrolysates of organosilanes in an acid medium is described. The method comprises adding a neutralizing agent containing a chelatable metal ion to the silanol hydrolysate in an acid medium to reduce the acidity of the medium; removing solids from the medium; and adding a chelating agent to form a chelate with metal in the medium. In a preferred embodiment, methyltrimethoxysilane is hydrolyzed with an excess of slightly acidic water; calcium carbonate neutralizing agent is added thereto to reduce the acidity of the medium; excess calcium carbonate and other solids in the medium are removed by filtration; and acetylacetone is added as a chelating agent to form a chelate or to interact with the calcium from the calcium carbonate neutralizing agent in the medium. The process of this invention stops haze formation in the products formed by the process of the invention and substantially extends the shelf life of silanol hydrolysates of organolsilanes.
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General Electric Company
Marquis Melvyn I.
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