Polyisocyanate curing agent and paint and adhesive compositions

Details Polyisocyanate curing agent and paint and adhesive compositions Polyisocyanate curing agent and paint and adhesive compositions

1994-04-28

1996-03-26

Seidleck, James J.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 65, 528 67, 528 85, 528905, C08G 1830

Patent

active

055021492

ABSTRACT:
The present invention provides a curing agent comprising a polyisocyanate compound obtained from hexamethylene diisocyanate and containing not more than 0.5% by weight of hexamethylene diisocyanate monomer, 21 to 60% weight of uretidine dione dimer and 11 to 40% by weight of isocyanurate cyclic trimer, the uretidine dione dimer and the isocyanurate cyclic trimer being prepared from a product obtained by urethane modification of 0.5 to 15 mole % by mole of total isocyanate groups of the hexamethylene diisocyanate by a dihydric alcohol having at least two hydroxyl groups and a branched hydrocarbon group having 4 to 35 carbon atoms in the molecule, which the side chain hydrocarbon groups in the branched hydrocarbon group have 2 to 33 carbon atoms in total. The curing agent has a low viscosity and a good compatibility with a solvent, and can provides a polyurethane paint or adhesive composition having good curing property, drying property, adhesion strength and weathering resistance.

REFERENCES:
patent: 4187215 (1980-02-01), Wrightson
patent: 4576855 (1986-03-01), Okina et al.
patent: 4582888 (1986-04-01), Kasi et al.
patent: 4929724 (1990-05-01), Engbert et al.
patent: 5043092 (1991-08-01), Pedain et al.
patent: 5354834 (1994-10-01), Yoshida et al.

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