Polyisocyanate mixtures, a process for their preparation and...

Details Polyisocyanate mixtures, a process for their preparation and... Polyisocyanate mixtures, a process for their preparation and...

2009-11-25

2011-11-22

Cooney, John (Department: 1765)

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

Synthetic resins

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

C428S423100, C525S127000, C528S078000, C528S080000, C528S084000, C560S025000, C560S158000, C560S334000, C560S335000, C560S355000

Reexamination Certificate

active

08063144

ABSTRACT:
The present invention relates to polyacrylate-modified polyisocyanates which are i) prepared from aromatic, araliphatic, cycloaliphatic and/or aliphatic polyisocyanates having an NCO content of 5% to 25% by weight, an NCO functionality ≧2 and a viscosity measured as solvent free resin of 150 to 200,000 mPa·s at 23° C., and ii) contain at least one structural unit of the formula (I)R is hydrogen or a methyl group,R1is an optionally heteroatom-containing hydrocarbon radical andR2is a hydrocarbon radical having at least one isocyanate group and optionally urethane, allophanate, biuret, uretdione, isocyanurate and/or iminooxadiazinedione groups andn is a number ≧1;and to processes for preparing these polyisocyanates and to binder compositions containing these polyisocyanates, which may be hydrophilically modified and a compound having NCO-reactive groups.

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