Allophanate-containing modified polyurethanes

Details Allophanate-containing modified polyurethanes Allophanate-containing modified polyurethanes

C - Chemistry, Metallurgy

07

C

C07C 275/60 (2006.01) C08G 18/78 (2006.01) C08G 71/04 (2006.01) C09D 175/02 (2006.01) C09J 175/02 (2006.01)

Patent

CA 2539063

The present invention relates to a process for lowering the viscosity of compositions containing compounds having urethane groups, in which all or some of the urethane groups contained therein are reacted with monoisocyanates to form allophanate groups. The present invention also relates to compounds having allophanate groups and compositions containing such compounds, wherein at least mole % of the allophanate groups contained therein correspond to formula I) (see formula I) wherein R is an alkyl, aralkyl or aryl radical which has up to 20 carbon atoms and optionally contains heteroatoms and wherein these radicals can also have, in addition to the NCO group present as part of the allophanate group, other functional groups which are neither isocyanate groups nor functional groups derived from isocyanate groups.

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