Aqueous wax dispersions as cell openers in making polyurethane f

Details Aqueous wax dispersions as cell openers in making polyurethane f Aqueous wax dispersions as cell openers in making polyurethane f

1999-03-29

2000-06-27

Sergent, Rabon

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521110, 521112, 521130, 521131, 521137, 521170, 521172, 521174, 521122, C08J 908, C08J 914, C08K 501, C08K 5103, C08K 55415

Patent

active

060808004

ABSTRACT:
A method for preparing a flexible or semi-flexible polyurethane foam by reacting an organic polyisocyanate with a polyol in the presence of urethane catalyst, water as a blowing agent, optionally a silicone surfactant, and a cell opening additive characterized in that the cell opening additive comprises an aqueous dispersion of particles comprising a wax substance and optionally an emulsifier, at least 35% of the particles having a size of 0.2 to 5 microns and a melting point which ranges from 0 to 55.degree. C. below the maximum foam exotherm temperature.

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patent: 4751253 (1988-06-01), Tylenda
patent: 4791146 (1988-12-01), Tylenda
patent: 4929646 (1990-05-01), Nichols et al.
patent: 4936917 (1990-06-01), Harakal et al.
patent: 5614566 (1997-03-01), Burkhart et al.
Ron Herrington and Kathy Hock; "Flexible Polyurethane Foams"; Dow Plastics p. 2.31, 1991.

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