Method for producing an aqueous silicone emulsion composition

Details Method for producing an aqueous silicone emulsion composition Method for producing an aqueous silicone emulsion composition

1986-04-09

1987-06-30

Marquis, Melvyn I.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524859, 524588, 524401, 524425, 524432, 524437, 524445, 524493, 528 15, 528 17, 528 18, 528 21, 528 19, C08L 8304

Patent

active

046771603

ABSTRACT:
According to the present invention, an aqueous silicone emulsion composition is produced as follows. A base emulsion is prepared from prescribed quantities of an essentially straight-chain organopolysiloxane with at least 2 silicon-bonded hydroxyl groups in each molecule, colloidal silica or alkali metal silicate, a curing catalyst, an emulsifier and water. After the pH is adjusted to 9 to 12 and ripened until an elastomer material is formed by the removal of water at room temperature, prescribed quantities of an epoxy-functional silane coupling agent or its partial hydrolysis product or its partial hydrolysis condensation product, a filler and a dispersant are added. The produced aqueous silicone emulsion composition bonds tightly to porous substrates in contact with it during curing and is therefore extremely useful as a coating or sealing material for various porous substrates.

REFERENCES:
patent: 4221688 (1980-09-01), Johnson et al.
patent: 4427811 (1984-01-01), Elias et al.
patent: 4559056 (1985-12-01), Leigh et al.
patent: 4587288 (1986-05-01), Maxson et al.
patent: 4590220 (1986-05-01), Bauman et al.

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