Thermoplastic polyurethane admixtures
First Claim
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1. An admixture comprising a thermoplastic polyurethane base polymer having a Shore durometer hardness of between 60A and 85D and a fluorinated additive mixture, wherein said fluorinated additive mixture comprises compounds of formula (I):
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G-[B-A]n-B-G
(I),and between 0.1% and 5% (w/w) trimer of formula (II);
G-B-G
(II),whereinA is a soft segment comprising polypropylene oxide, polyethylene oxide, or polytetramethylene oxide, hydrogenated polybutadiene (HLBH), poly(2,2 dimethyl-1-3-propylcarbonate) (PCN), polybutadiene (LBHP), diethyleneglycol-orthophthalicanhydride polyester (PDP), poly(hexamethyhlenecarbonate)diol, hydroxyl terminated polydimethylsiloxanes (PrO-PDMS-PrO) block copolymer, hydrogenated-hydroxyl terminated polyisoprene, poly(ethyleneglycol)-block-poly(propyleneglycol)-block-poly(ethylene glycol), 1,12-dodecanediol, hydrogenated polyisoprene (HHTPI), poly(hexamethylene carbonate), or poly(2-butyl-2-ethyl-1,3-propyl carbonate);
B is a hard segment comprising terminal urethane linkages;
G is an polyfluoroalkyl group; and
n is an integer from 1 to 15.
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Abstract
The invention relates to admixtures of thermoplastic polyurethane base polymers that resist surface dulling and fluorinated additives and their use in the manufacture of articles, such as medical devices. For example, the admixtures of the invention are useful in the manufacture of blood dwelling medical devices, such as catheters.
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Citations
25 Claims
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1. An admixture comprising a thermoplastic polyurethane base polymer having a Shore durometer hardness of between 60A and 85D and a fluorinated additive mixture, wherein said fluorinated additive mixture comprises compounds of formula (I):
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G-[B-A]n-B-G
(I),and between 0.1% and 5% (w/w) trimer of formula (II);
G-B-G
(II),wherein A is a soft segment comprising polypropylene oxide, polyethylene oxide, or polytetramethylene oxide, hydrogenated polybutadiene (HLBH), poly(2,2 dimethyl-1-3-propylcarbonate) (PCN), polybutadiene (LBHP), diethyleneglycol-orthophthalicanhydride polyester (PDP), poly(hexamethyhlenecarbonate)diol, hydroxyl terminated polydimethylsiloxanes (PrO-PDMS-PrO) block copolymer, hydrogenated-hydroxyl terminated polyisoprene, poly(ethyleneglycol)-block-poly(propyleneglycol)-block-poly(ethylene glycol), 1,12-dodecanediol, hydrogenated polyisoprene (HHTPI), poly(hexamethylene carbonate), or poly(2-butyl-2-ethyl-1,3-propyl carbonate); B is a hard segment comprising terminal urethane linkages; G is an polyfluoroalkyl group; and n is an integer from 1 to 15. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification