Method of shaping ethylenically unsaturated monomer solutions co

Details Method of shaping ethylenically unsaturated monomer solutions co Method of shaping ethylenically unsaturated monomer solutions co

1977-12-06

1978-12-12

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Plural sequential shaping or molding steps on same workpiece

264331, 260859R, B29G 100, B29B 104, B29C 300, C08L 7500

Patent

active

041296419

ABSTRACT:
Ethylenically unsaturated monomer solutions are thickened to moldable gels by the formation of homogeneous urylene-linked linear saturated polyester/polyurethane resin mixtures. These are made by the addition of certain diamines to monomer solutions containing isocyanate terminated polyester/polyurethane resins. These gels exhibit improved laminar flow characteristics at moderate molding temperatures and pressures and retain these flow characteristics even when they contain as high as 80 percent concentrations of a filler such as 1-inch fiber glass filaments. The method comprises shaping the gel to obtain a shaped tractable article and then further shaping the shaped tractable article until the article becomes intractable. Shaping can be by casting in a mold or by compression molding.

REFERENCES:
patent: 2912418 (1959-11-01), Johnson et al.
patent: 3886229 (1975-05-01), Hutchinson

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