Solid silicone defoamer

Details Solid silicone defoamer Solid silicone defoamer

1988-08-30

1990-10-09

Ford, John M.

Compositions

Preservative agents

Anti-corrosion

252321, C09K 300

Patent

active

049618776

ABSTRACT:
A solid silicone defoaming agent which includes a mixture of silicone oil having a viscosity of at least 20 centistokes at 25 degrees Centigrade and microparticulate silica, a copolymer selected from the group consisting of polyoxyalkylene and polyoxyalkylene/polysiloxane copolymers, and a wax selected from the group consisting of a water-insoluble wax which is insoluble in water at room temperature and which has a melting point of at least 35 degrees Centigrade, and a water-soluble wax which dissolves and disperses in water at room temeprature and which has a melting point of at least 30 degrees Centigrade.

REFERENCES:
patent: 3746653 (1973-07-01), Churchfield
patent: 4123383 (1978-10-01), Ihde, Jr.
patent: 4192761 (1980-03-01), Peltree et al.
patent: 4265779 (1981-05-01), Gandolfo et al.
patent: 4274977 (1981-06-01), Koerner et al.
patent: 4514319 (1985-04-01), Kulkarni
patent: 4599189 (1986-07-01), Wuhrmann et al.
patent: 4690713 (1987-09-01), Terae et al.
patent: 4767568 (1988-08-01), Abel et al.

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