Lacquer polyisocyanates with aliphatically and aromatically boun

Details Lacquer polyisocyanates with aliphatically and aromatically boun Lacquer polyisocyanates with aliphatically and aromatically boun

1995-07-31

1997-02-25

Sergent, Rabon

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...

2521822, 25218221, 25218222, 528 44, 528 49, 528 59, 528 67, 544193, 544222, 560 25, 560 26, 560336, 560355, 560358, 560360, C08G 1876, C08G 1879, C07D25134, C07C26502

Patent

active

056060041

ABSTRACT:
A process for preparing liquid lacquer polyisocyanates with aliphatically and aromatically bound isocyanate groups and an NCO content of 5 to 25 wt. % by trimerizing an isocyanate component A), containing A1) 70 to 100 wt. % of diisocyanatotoluene and A2) 0 to 30 wt. % of other aromatic isocyanates and B) aliphatic lacquer polyisocyanates, optionally with prior, simultaneous and/or subsequent reaction of a portion of the isocyanate groups with an alcohol component C) having a molecular weight of 32 to 900, and optionally in the presence of D) inert solvents; the resulting lacquer polyisocyanates; and their use in coating compositions, in particular as a cross-linking agent for polyhydroxyl compounds in two-component polyurethane coating compositions.

REFERENCES:
patent: 3280066 (1966-10-01), France et al.
patent: 3284413 (1966-11-01), Heiss
patent: 3645979 (1972-02-01), Liebsch et al.
patent: 4255569 (1981-03-01), M uller et al.
patent: 4293680 (1981-10-01), Mazanek et al.
patent: 4456709 (1984-06-01), Richter et al.
patent: 4675401 (1987-06-01), Robin
patent: 5066689 (1991-11-01), Patzschke et al.

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