Plastic and nonmetallic article shaping or treating: processes – Forming continuous or indefinite length work – Layered – stratified traversely of length – or multiphase...
Patent
1974-07-15
1976-06-29
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Forming continuous or indefinite length work
Layered, stratified traversely of length, or multiphase...
260 775SP, B29F 310
Patent
active
039668665
ABSTRACT:
A particular elastomeric polyurethane polymer is heated to about 225.degree.C. to ensure complete melting prior to extrusion side-by-side with a molten hard polymer. The polyurethane polymer is made from an aromatic diisocyanate, a high molecular weight (800-3000) diol and a low molecular weight (500 or less) diol, combined in specific ratio ranges.
REFERENCES:
patent: 3174949 (1965-03-01), Harper
patent: 3233025 (1966-02-01), Frye et al.
patent: 3357954 (1967-12-01), Kirkaldy
patent: 3402097 (1968-09-01), Knudsen et al.
patent: 3642964 (1972-02-01), Rausch et al.
patent: 3668185 (1972-06-01), Boutsicaris
patent: 3761348 (1973-09-01), Chamberlin
Ballman Richard L.
Lea Kenneth R.
Nunning Walter J.
Southern John H.
Corley Kelly O.
Monsanto Company
Woo Jay H.
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