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US 2016/0102168 A1Published application
Bio-based diisocyanate and chain extenders in crystalline segmented thermoplastic polyester urethanes
AssigneeTrent University
InventorsSuresh Narine, Shaojun Li, Jesmy Jose, Laziz Bouzidi
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Abstract
The synthesis of semi-crystalline thermoplastic polyester urethanes is disclosed. The synthesis describes parameters such as controlled concentration, distribution, and types of crystalline hard segment blocks to correlate the effect of hard segment crystallinity to that of the soft segment blocks.
Claims21
A thermoplastic polyester urethane composition having the formula [CmI]x-[P(CmI)y]z,
- wherein:
- (i) [CmI]x is a hard segment block present in an amount of 0% to 100% weight percent of the composition, and Cm is a chain extender where m is 9, I is a natural oil based organic isocyanate, and x is a number of repeating units of the hard segment, where x is 0 to 5, and
- (ii) [P(CmI)y]z is a soft segment block present in the amount of 0% to 92% weight percent of the composition, wherein P is a polyester diol, y is I when (CmI)y+0, and z is 0 to 74.
A thermoplastic polyester urethane composition having the formula [CmI]x-[P(CmI)y]z wherein:
- (i) [CmI]x is a hard segment block present in an amount of 16% to 46% weight percent of the composition, and Cm is a chain extender where m is 9, I is a natural oil based organic isocyanate, and x is a number of repeating units of the hard segment, where x is 0 to 3, and
- (ii) [P(CmI)y]z is a soft segment block present in an amount of 49% to 76% weight percent of the composition, wherein P is a polyester diol, y is I when (CmI)y=0 or 1 to 2, and z is 1.
A thermoplastic polyester urethane composition having the formula [CmI]x-[P(CmI)y]z wherein:
- (i) [CmI]x is a hard segment block present in an amount of 46% weight percent of the composition, and Cm is a chain extender where m is 3 to 9, I is a natural oil based organic isocyanate, and x is a number of repeating units of the hard segment, where x is 0 to 2, and
- (ii) [P(CmI)y]z is a soft segment block present in an amount of 49% weight percent of the composition, wherein P is a polyester diol, y is 1, and z is 1.
Dependencies are inferred from the claim text.