Coating processes – With post-treatment of coating or coating material – Heating or drying
Patent
1983-12-19
1984-10-16
Kendell, Lorraine T.
Coating processes
With post-treatment of coating or coating material
Heating or drying
427379, 427381, 427386, 427387, 4273898, B05D 302, D02G 300
Patent
active
044774966
ABSTRACT:
An aqueous sizing composition, method of preparing same and sized glass fibers are provided that enables the production of sized glass fibers having improved filamentization. Improvements of the present invention emanate from the use of an interaction product of an epoxidized polar thermoplastic copolymer and an amino organo silane coupling agent in an aqueous sizing composition that also contains a predominant amount of a cross-linkable film former. The aqueous sizing composition has one or more cross-linkable film formers, one or more organo silane coupling agents and about 2 to about 12 weight percent of an interaction product of an unhydrolyzed or partially hydrolyzed amino organo silane coupling agent and an epoxidized polar thermoplastic copolymer. The epoxy copolymer has about 2 to about 12 parts of monomer with epoxy functionality per 100 parts of copolymer. Also the epoxy copolymer has a glass transition temperature (Tg) of from -10.degree. C. to about 70.degree. C. The unhydrolyzed or partially hydrolyzed amino silane coupling agent is contacted with the epoxidized copolymer, where the copolymer has a percent solids in the range of about 15 to about 60 weight percent.
The aqueous sizing composition is applied to glass fibers during their formation, and the sized glass fibers are gathered into strands and dried at a temperature of above 100.degree. C. for about 4 hours. A plurality of the dried, sized glass fiber strands are gathered dried and collected for use in various forms such as chopped strands, continuous strands, mats and the like for reinforcing polymeric materials.
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Das Balbhadra
Moore L. Dow
Kendell Lorraine T.
PPG Industries Inc.
Stachel Kenneth J.
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