Process for preparing self-crosslinking resin

Details Process for preparing self-crosslinking resin Process for preparing self-crosslinking resin

1993-03-02

1996-12-24

Gorr, Rachel

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

Synthetic resins

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

525123, 525453, 525217, 525384, 525 77, 5253282, 525374, 525383, 528 45, 526310, 526312, 2521822, C08G 1862

Patent

active

055874266

ABSTRACT:
The present invention provides:
(1) a self-crosslinking resin (I) having a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (A) having at least two free isocyanate groups in the molecule and an acrylic resin (B) having at least two hydroxyl groups in the molecule by reacting some of the hydroxyl groups of the resin (B) with some of the free isocyanate groups of the polymer (A), and subsequently reacting a blocking agent with all the remaining free isocyanate groups, and
(2) a self-crosslinking resin (II) having a blocked isocyanate group and a hydroxyl group in the molecule and characterized in that the resin is prepared from a vinyl polymer (C) having a free isocyanate group and a blocked isocyanate group in the molecule and the acrylic resin (B) having at least two hydroxyl groups in the molecule by reacting some of the hydroxyl groups of the resin (B) with all the free isocyanate groups of the polymer (C).

REFERENCES:
patent: 4743653 (1988-05-01), Numata et al.
patent: 4797449 (1989-01-01), Nakayama et al.
patent: 4829120 (1989-05-01), Yabata
patent: 5116930 (1992-05-01), Yabuta et al.
patent: 5124399 (1992-06-01), Yabuta et al.
patent: 5233003 (1993-08-01), Lucas et al.
patent: 5274045 (1993-12-01), Yukawa et al.
patent: 5288803 (1994-02-01), Yukawa et al.
Derwent Abstract of JP-A-63 186 722, Aug. 2, 1988.

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