Thermoplastic polyurethane blends

Details Thermoplastic polyurethane blends Thermoplastic polyurethane blends

1992-09-03

1994-01-25

Seidleck, James J.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525424, 525440, 525453, 525454, 525457, 604264, 2642091, C08L 8310

Patent

active

052816770

ABSTRACT:
A thermoplastic polyurethane chain extended with an alkylenediol is blended with a thermoplastic polyurethane chain extended with an oxyalkylene qlycol oligomer. The blend is extruded into a catheter tubing having sufficient initial stiffness for satisfactory insertion in a patient and a high degree of softening for safe positioning and long term catheterization procedures without the risk of vessel wall perforation.

REFERENCES:
patent: Re31873 (1985-04-01), Howes
patent: 4454309 (1984-06-01), Gould et al.
patent: 4657024 (1987-04-01), Coneys
patent: 4781703 (1988-11-01), Walker et al.
patent: 4861830 (1989-08-01), Ward, Jr.
patent: 4994047 (1991-02-01), Walker et al.
patent: 5004456 (1991-04-01), Botterbusch et al.
patent: 5061254 (1991-10-01), Karakelle et al.

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