Hydrophilic and hydrophobic polyether polyurethanes and uses the

Details Hydrophilic and hydrophobic polyether polyurethanes and uses the Hydrophilic and hydrophobic polyether polyurethanes and uses the

1998-03-18

1999-11-30

Gorr, Rachel

Stock material or miscellaneous articles

Composite

Of polyamidoester

428375, 4284237, 4284248, 6048911, 21617, 528 76, C08G 1844

Patent

active

059939729

ABSTRACT:
An improved amphiphilic diol is prepared with a controlled type and amount of alkylene glycol, catalyst, hydrophobic and hydrophilic diol with diisocyanate and water. Critical selection of the type, molecular weight and ratios of hydrophilic to hydrophobic diol, isocyanate to hydroxyl groups, average molecular weight of the diol component, the amount of water in the reaction mixture produces a polyuretheane having high slip, Shore A Hardness values, wet tensile strength and tear strength. This invention also includes uses of the polyurethane in catheters, shaving products, synthetic valves, veins and arteries, stents, ports, shunts and coatings. Preferably, the polyurethane is used in combination with a filler for application to rubber gloves. In addition, dispersions, lotions, gels and solutions can be formed of the polyurethane.

REFERENCES:
patent: 4424305 (1984-01-01), Gould et al.
patent: 4920172 (1990-04-01), Daoud
patent: 5563233 (1996-10-01), Reich et al.

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