Heat resistant high moisture vapor transmission thermoplastic polyurethane
AssigneeNoveon, Inc.
InventorsRavi Ram Vedula, Kimberly Lynn Young
Life of this patent
Estimating the term…
Abstract
A thermoplastic polyether polyurethane having high moisture vapor transmission, high melting point and static dissipative properties is disclosed. The thermoplastic polyether polyurethane is prepared by reacting a hydroxyl terminated polyether intermediate, an aromatic chain extender glycol, and a polyisocyanate. The polymers formed are useful for melt-spun fibers, fabric coatings for breathable garments, house wrap, roofing membranes, and other applications requiring high vapor transmission and high melting points.
Claims15
A breathable article comprising:
- (a) at least one layer of fabric and (b) at least one layer of thermoplastic polyurethane polymer, wherein said polyurethane polymer is a polyether polyurethane derived from at least one diisocyanate reacted in a one-shot process with at least one hydroxyl terminated aromatic glycol chain extender selected from the group consisting of 1,4-di(hydroxymethyl) benzene, 1,2-di(hydroxymethyl) benzene, 1,4-di(2-hydroxyethoxy) benzene, 1,3-di(2-hydroxyethyl) benzene, 1,2-di(2-hydroxyethoxy) benzene, and combinations thereof, and at least one hydroxyl terminated polyether polyethylene glycol intermediate containing an alkylene oxide having the formula
- (CH2)x—Oy
- wherein x is 2 and y is an integer from 11 to 115 wherein the amount of aromatic glycol chain extender used is from about 1.2 to about 1.8 moles per mole of hydroxyl terminated polyether intermediate and the mole ratio of the at least one diisocyanate used is from about 0.95 to about 1.05 moles of diisocyanate per mole of the total moles of the one or more hydroxyl terminated polyether intermediate and the one or more hydroxyl terminated aromatic glycol chain extender.
A melt spun fiber comprising a thermoplastic polyurethane polymer, wherein said polyurethane polymer is a polyether polyurethane derived from at least one diisocyanate reacted in a one-shot process with at least one hydroxyl terminated aromatic glycol chain extender selected from the group consisting of 1,4-di(hydroxymethyl) benzene, 1,2-di(hydroxymethyl) benzene, 1,4-di(2-hydroxyethoxy) benzene, 1,3-di(2-hydroxyethyl) benzene, 1,2-di(2-hydroxyethoxy) benzene, and combinations thereof, and at least one hydroxyl terminated polyether polyethylene glycol intermediate containing an alkylene oxide having the formula
- (CH2)x—Oy
- wherein x is 2 and y is an integer from 11 to 115 wherein the amount of aromatic glycol chain extender used is from about 1.2 to about 1.8 moles per mole of hydroxyl terminated polyether intermediate and the mole ratio of the at least one diisocyanate used is from about 0.95 to about 1.05 moles of diisocyanate per mole of the total moles of the one or more hydroxyl terminated polyether intermediate and the one or more hydroxyl terminated aromatic glycol chain extender.
A clothing garment comprising melt spun fibers, said fibers are thermoplastic polyurethane polymer fibers derived from at least one diisocyanate reacted with in a one-shot process at least one hydroxyl terminated aromatic glycol chain extender selected from the group consisting of 1,4-di(hydroxymethyl) benzene, 1,2-di(hydroxymethyl) benzene, 1,4-di(2-hydroxyethoxy) benzene, 1,3-di(2-hydroxyethyl) benzene, 1,2-di(2-hydroxyethoxy) benzene, and combinations thereof and at least one hydroxyl terminated polyether polyethylene glycol intermediate containing an alkylene oxide having the formula
- (CH2)x—Oy
- wherein x is 2 and y is an integer from 11 to 115 wherein the amount of aromatic glycol chain extender used is from about 1.2 to about 1.8 moles per mole of hydroxyl terminated polyether intermediate and the mole ratio of the at least one diisocyanate used is from about 0.95 to about 1.05 moles of diisocyanate per mole of the total moles of the one or more hydroxyl terminated polyether intermediate and the one or more hydroxyl terminated aromatic glycol chain extender.
Dependencies are inferred from the claim text.