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Title:
POLYURETHANE MEMBRANE PREPARED BY WET PROCESS
Document Type and Number:
Japanese Patent JPS57155241
Kind Code:
A
Abstract:

PURPOSE: To prepare the titled membrane having uniform color and extremely excellent softness, smoothness and uniformity, by the wet coagulation of a composition composed of two kinds of polyurethane elastomers having close gel point with each other, and a pigment.

CONSTITUTION: The objective membrane is prepared by the wet coagulation of a composition composed of (A) a polyether polyurethane elastomer wherein ≥40wt% of the polymeric diol component is polyether diol, (B) a polyether/polyester and/ or polycarbonate polyurethane elastomer, (C) a pigment, and (D) a solvent, wherein the component (A) and component (B) satisfy the formula GA-1 ≤GB≤GA+1 (GA is gel point of the component A, and GB is gel point of the component B). The amount of the polyester diol component of the component (B) is ≥5wt% of the total polymeric diol. The mixing of the components is carried out by compounding the component B with the pigment, and then mixing the mixture with the component A by the aid of the solvent.


Inventors:
TANAKA MINORU
NAKAMURA HIDEO
ISHIGURO YOKICHI
MIZUGUCHI SHIYUNJI
Application Number:
JP1981000040479
Publication Date:
September 25, 1982
Filing Date:
March 23, 1981
Export Citation:
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Assignee:
TORAY INDUSTRIES
International Classes:
B32B5/18; C08G18/00; C08G18/42; C08G18/48; C08J9/28; C08L75/00; D06N3/14; (IPC1-7): B32B5/18; C08G18/42; C08G18/48; C08J9/28; D06N3/14



 
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