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MULTI-FUNCTIONAL CARBAMATE HAVING SOFT-SEGMENTS, POLYISOCYANATE OBTAINED VIA SUBSEQUENT NON-PHOSGENE SYNTHESIS METHODS, URETHANE PREPOLYMER AND ELASTOMERIC URETHANE HAVING SOFT-SEGMENTS DERIVED THEREFROM, AND PREPARATION METHOD THEREOF
MULTI-FUNCTIONAL CARBAMATE HAVING SOFT-SEGMENTS, POLYISOCYANATE OBTAINED VIA SUBSEQUENT NON-PHOSGENE SYNTHESIS METHODS, URETHANE PREPOLYMER AND ELASTOMERIC URETHANE HAVING SOFT-SEGMENTS DERIVED THEREFROM, AND PREPARATION METHOD THEREOF
The present invention relates to a multi-functional carbamate having a soft segment, which can be used as a raw material in the preparation of a polyisocyanate having a special siloxane soft segment in its structure by a non-phosgene method; to a polyisocyanate having a special siloxane soft segment prepared by a non-phosgene method; to a urethane prepolymer having a special siloxane soft segment, prepared from a polyisocyanate having a special siloxane soft segment and a polyol; and also to a elastomeric urethane having a special siloxane soft segment, prepared by reacting a polyisocyanate having a special siloxane soft segment with a polyol and an optional chain extender. The present invention also relates to a synthesis method for the above-mentioned substances.
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