US 8,133,945 B2 · Defoaming agent for water based paint

Abstract

A defoaming agent which can effectively eliminate foams generated in the occasions of preparation, coating, drying and baking of water-based paint, by addition thereof by itself, without combined use of other kind(s) of defoaming agent(s), and furthermore without impairing appearance of baked coated film of the paint or recoatability of the paint is provided. Such a defoaming agent for water-based paint has the composition comprising (1) polyoxyethylene hydrogenated castor oil triisostearates and (2) polyalkyl vinyl ether, polybutadiene, polybutene or polyisoprene, which are dissolved in (3) liquid normal paraffin, liquid isoparaffin or liquid cycloparaffin, at such a ratio that the blended amount of (1) occupies 2-90% by weight of the total composition.

Claims7

Dependent claims

A defoaming agent for water-based paint, comprising:

(1) a polyoxyethylene hydrogenated castor oil triisostearate represented by the formula (A)
wherein, in the formula (A), a+b+c=an integer of 5 -50, a>1, b>1 and c>1, and
(2) a polyalkyl vinyl ether, which is dissolved in
(3) a liquid isoparaffin,
wherein the blended amount of the polyoxyethylene hydrogenated castor oil triisostearate is 2-90% by weight based on the weight of the defoaming agent for water-based paint.

2 more elements

Dependencies are inferred from the claim text.

Defoaming agent for water based paint

Life of this patent

Defoaming agent for water based paint

Life of this patent

Abstract

Claims7