Copolycarbonate diol and thermoplastic polyurethane obtained...

Details Copolycarbonate diol and thermoplastic polyurethane obtained... Copolycarbonate diol and thermoplastic polyurethane obtained...

2005-03-29

2005-03-29

Gorr, Rachel (Department: 1711)

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C568S852000, C528S370000, C252S182200

Reexamination Certificate

active

06872797

ABSTRACT:
A copolycarbonate diol comprising:(a) recurring units each represented by the following formula (1):(b) recurring units each independently represented by the following formula (2):wherein n is 4, 5 or 6; and(c) terminal hydroxyl groups, wherein the copolycarbonate diol has a number average molecular weight of from 300 to 20,000, and wherein the amount of the recurring units (a) is from 10 to 90% by mole, based on the total molar amount of the recurring units (a) and (b). A thermoplastic polyurethane obtained by copolymerizing the above-mentioned copolycarbonate diol with a polyisocyanate.

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