Method for defoaming aqueous dispersions of polymeric organic su

Details Method for defoaming aqueous dispersions of polymeric organic su Method for defoaming aqueous dispersions of polymeric organic su

1989-02-10

1991-07-16

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 29, 556445, 556446, C08G 7704

Patent

active

050326627

ABSTRACT:
Polyoxyalkylene-polysiloxane block copolymers are disclosed which exhibit an outstanding defoaming action and have the special advantage of not causing wetting defects when dispersions defoamed therewith are applied on a 2-dimensional substrate. Dispersions of polymeric organic substances, especially dispersions of vehicles, coating agents and adhesives are defoamed by the addition of 0.01 to 2.0% by weight, based on the dispersion to be defoamed, of a polyoxyalkylene-polysiloxane block copolymer of the formula,

REFERENCES:
patent: 3600418 (1971-08-01), Bailey et al.
patent: 3629310 (1971-12-01), Bailey et al.
patent: 4028218 (1977-06-01), Fink et al.

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