Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1997-12-12
1999-11-02
Short, Patricia A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524247, 524285, 524296, 524297, 524299, 524314, 524317, 524318, 524368, 524375, 524378, 524394, 524590, 524591, 523105, 264299, 264301, C08L 7504, B29C 4102
Patent
active
059772239
ABSTRACT:
A method of manufacturing a thin-walled polyurethane article includes dipping a shaped former into a coagulant solution and subsequently dipping the shaped former into an aqueous-phase polyurethane/plasticizer dispersion wherein the unplasticized polyurethane has a mean particle size of between about 0.5 .mu.m and 1.0 .mu.m and wherein the plasticizer causes the polyurethane particles to swell until they have a mean particle size of between about 1.5 .mu.m and 3.0 .mu.m. Articles so produced have a thickness of between 0.03 mm to 1.0 mm, a tensile strength of between 17 MPa and 60 Mpa and an elongation at break of greater than 650%.
REFERENCES:
patent: 2968575 (1961-01-01), Mallonee
patent: 4644030 (1987-02-01), Loewrigkeit
patent: 4888379 (1989-12-01), Henning
Sadowski, J.S., et al. "Polyurethane Latexes for Coagulation Dipping", Elastomerics pp. 17-20, Aug. 1978.
Cacioli Paul
Gromelski Stanley J.
Hardwick Steven Thomas
Milner Richard
Nile Jeffery G.
Ansell Healthcare Products Inc.
Short Patricia A.
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