Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1979-06-18
1982-09-28
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
65 343, 428391, 428392, 523502, 524542, 524762, 524828, 524836, C08L 9100, D02G 300
Patent
active
043517528
ABSTRACT:
A sizing composition and method of preparing sized glass fiber strand is provided to produce sized glass fiber strand that has reduced tackiness. The sizing composition has a low molecular weight liquid polymer selected from the group consisting of styrene-butadiene copolymer, acrylonitrile-butadiene copolymer or hydroxy or carboxy derivatives of said copolymers, epoxy resins, polyester resins, or polyurethane resins that are free radically curable; and a free radical precurser selected from the group consisting of peroxides, hydroperoxides in an amount in the range of about 0.2 to 5 parts per hundred parts of liquid polymer in said sizing composition; or the said liquid polymer that can be treated with radiation to produce an equivalent amount of free radicals. The method of producing the less tacky sized glass fiber strands includes treating the glass fibers with the sizing composition, drying the sized glass fiber strand to produce the free radicals and slightly cross-link the liquid polymer or when peroxides or hydroperoxides are absent to treat the sized glass fiber strand to a source of radiation sufficient in energy and time to produce an equivalent amount of free radicals as that produced by the peroxides or hydroperoxides from the liquid polymer.
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Das Balbhadra
Fahey Dennis M.
Anderson Harold D.
PPG Industries Inc.
Stachel Kenneth J.
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