Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1983-10-03
1985-08-20
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
264184, 264205, 264343, 264344, C08K 502
Patent
active
045365369
ABSTRACT:
Solutions of ultrahigh molecular weight polymers such as polyethylene in a relatively nonvolatile solvent are extruded through an aperture at constant concentration through the aperture and cooled to form a first gel of indefinite length. The first gels are extracted with a volatile solvent to form a second gel and the second gel is dried to form a low porosity xerogel. The first gel, second gel or xerogel, or a combination, are stretched. Among the products obtainable are polyethylene fibers of greater than 30 or even 40 g/denier tenacity and of modulus greater than 1000 or even 1600 or 2000 g/denier.
REFERENCES:
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patent: 4137394 (1979-01-01), Meihuizen et al.
patent: 4320210 (1982-03-01), Kim et al.
patent: 4413110 (1983-11-01), Kavesh et al.
Journal of Materials Science, 15 (1980), 2584-2590, Kalb et al.
Smook, Flinterman and Pennings, Polymer Bulletin, vol. 2, pp. 775-783 (1980).
Kalb & Pennings, Polymer, vol. 21, pp. 3-4 (1980).
Kavesh Sheldon
Prevorsek Dusan C.
Allied Corporation
Fuchs Gerhard H,.
Hampilos Gus T.
Sarofim N.
Schofer Joseph L.
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