| 摘要 |
This invention relates to new polyols modified by guanidine groups, to a process for the preparation thereof and to the use thereof as starting component for the preparation of preferably foamed polyurethane plastics. The process involves (A) reacting diisocyanato-carbodiimides corresponding to the following general formula: OCN-(R2-N=C=N)m R2-NCO at a temperature of from about 25 DEG to 130 DEG C., optionally in the presence of an inert solvent, with polyhydroxyl compounds corresponding to the following general formula: A-OH)n in an OH/NCO-ratio of from 1.2:1 to 30:1 to form a polyhydroxyl compound containing carbodiimide groups and (B) completely or partly reacting, at a temperature of from 0 DEG to 150 DEG C., the remaining carbodiimide groups remaining in the production of Step (A), optionally in the presence of an inert solvent, with an amine, amide or hydrazide corresponding to the following general formula: R3-NR1H)s to form guanidine groups, and (C) distilling off the inert solvent, if used; wherein m represents an integer of from 1 to 10; and R1 represents a C1-C18 aliphatic, C4-C15 cycloaliphatic or C6-C15 aromatic or araliphatic radical which may optionally contain a double bond and/or be branched and which may optionally be substituted by a group selected from the group of hydroxyl or trifluoromethyl groups, fluorine, chlorine, bromine or iodine; R2 represents a divalent aliphatic, cycloaliphatic, aromatic or araliphatic radical having from 4 to 25 carbon atoms obtained by removing the isocyanate groups from a diisocyanate; A represents an n-valent radical of the type obtained by removing the hydroxyl groups from a polyhydroxyl compound having a molecular weight of from 62 to 6000; n represents an integer of from 2 to 8; s represents an integer of from 1 to 3.
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