Acrylate-styrene resins cross-linked by a blocked polyisocyanate

Details Acrylate-styrene resins cross-linked by a blocked polyisocyanate Acrylate-styrene resins cross-linked by a blocked polyisocyanate

1995-03-13

1996-10-22

Michl, Paul R.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

4273722, 4273855, 524507, 525124, 525127, 525128, 525131, 525455, 528 45, C08J 300, C08K 320, C08L 7500, B05D 302

Patent

active

055677622

ABSTRACT:
Resins based on a copolymerizate reacted with by a polyisocyanate, partially and transitorily blocked in the form of urea by an amino derivative, in which i) the polymerizate is based on styrene, at least two acrylic monomers of formula (I), H.sub.2 C.dbd.C(R)--COOR.sub.1, where R.dbd.hydrogen or methyl, R.sub.1 .dbd.hydrogen, linear or branched C.sub.1 -C.sub.14 alkyl radical, C.sub.1 -C.sub.4 hydroxyalkyl radical, and amongst which at least one of these acrylic monomers possesses a hydroxyl group, and at least one vinyl ester of a C.sub.9 -C.sub.19 trialkylacetic acid, ii) the polyisocyanate is chosen from the group of aliphatic polyisocyanates of formula (II) O.dbd.C.dbd.N--A--N.dbd.C.dbd.O where A represents a linear or branched C.sub.4 -C.sub.10 alkylene group and cyclic aromatic or cyclic aliphatic polyisocyanates and iii) this polyisocyanate is partially and transitorily blocked in the form of urea by a pyrazole group of formula (III) ##STR1## where R.sub.2, R.sub.3 and R.sub.4 .dbd.H or C.sub.1 -C.sub.4 alkyl; preparation process, use for the formulation of paint and/or lacquer, paint and/or lacquer containing them and process for the protection of surfaces using them.

REFERENCES:
patent: 4772666 (1988-09-01), Just et al.
patent: 4909915 (1990-03-01), Bederke et al.
patent: 5286782 (1994-02-01), Lamb et al.

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