Carboxyl group-containing polyurethane and heat-curable...

Details Carboxyl group-containing polyurethane and heat-curable... Carboxyl group-containing polyurethane and heat-curable...

2006-10-04

2010-06-22

Wu, David (Department: 1796)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C174S256000, C428S423100, C428S901000, C525S528000, C528S085000

Reexamination Certificate

active

07741411

ABSTRACT:
A carboxyl group-containing polyurethane is capable of giving cured products excellent in adhesion with substrates, low warpage, flexibility, plating resistance, soldering heat resistance and long-term reliability. The carboxyl group-containing polyurethane includes a structure derived from a polyol compound having 1 to 10 hydroxyl groups and 18 to 72 carbon atoms per molecule. The carboxyl group-containing polyurethane is produced by reacting: (A) a polyisocyanate compound; (B) a polyol compound having 1 to 10 hydroxyl groups and 18 to 72 carbon atoms per molecule; and (C) a carboxyl group-containing dihydroxy compound (other than the compound (B)).

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