Carbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene
AssigneeBASF SE
InventorsHeinz Bollmann, Karl Häberle, Nicolas Kokel, Raina Thärigen
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Abstract
Carbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene contain from 12 to 40% by weight of ethylene oxide units [—CH2—CH2—O—], based on the weight of the carbodiimides.
Claims6
A process for preparing carbodiimides based on 1,3-bis(1-methyl-1-isocyanatoethyl)benzene containing from 12 to 40% by weight of ethylene oxide units, based on the weight of the carbodiimides, which comprising reacting 1,3-bis(1-methyl-1-isocyanatoethyl)benzene in the presence of catalysts with elimination of carbon dioxide to form carbodiimides containing isocyanate groups and subsequently reacting said carbodiimides containing isocyanate groups with a mixture comprising:
- (i) compounds which are reactive towards isocyanates and contain at least 5 ethylene oxide units and
- (ii) compounds which are reactive toward isocyanates and contain less than 5 ethylene oxide units.
Dependencies are inferred from the claim text.