Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1979-09-04
1982-05-18
Pertilla, Theodore E.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
65 344, 65 343, 428378, 523408, 523409, 523411, 523412, C08L 9100, C08L 6302
Patent
active
043304443
ABSTRACT:
Sizing composition for glass fibers, method of making same, method of making sized glass fibers and sized glass fibers are provided to have improved sized glass fibers for use in thermosetting molding compounds. The improved sized glass fibers are produced with improved processability and have good handling characteristics and give improved properties to thermosetting molding compounds.
The sizing composition is an aqueous sizing composition having water soluble or dispersible, liquid epoxy resin, melamine formaldehyde condensate, polyamide resin and thermoplastic plasticizing agent, and one or more silane coupling agents.
The method of preparing the sizing composition involves adding the melamine formaldehyde condensate and polyamide resin before the addition of or in the presence of the epoxy resin.
The sized glass fibers are in contact with dried residue of the epoxy resin, melamine formaldehyde-polyamide reaction product, thermoplastic plasticizing agent and one or more silane coupling agents.
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Pertilla Theodore E.
PPG Industries Inc.
Stachel Kenneth J.
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