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US 4,049,597 AGranted
Glass fiber sizing composition
AssigneePPG Industries, Inc.
InventorDonald L. Motsinger
Life of this patent
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Abstract
A glass fiber sizing composition comprising a phenolic epoxy resin; the reaction product of a partial ester of a polycarboxylic acid which contains one or more unesterified carboxyl groups with a compound containing more than one epoxy group; a glass fiber lubricant; sufficient emulsifiers to impart a homogeneous mixture; a saturated fatty triglyceride; a silane coupling agent and a major amount of water. Glass fibers sized in accordance with the invention exhibit excellent reinforcing characteristics.
Claims6
A glass fiber sizing composition comprising a phenolic epoxy resin;
- the reaction product of a partial ester of a polycarboxylic acid containing 1 or more unesterified carboxyl group with a compound containing more than one epoxy group;
- a dual emulsifier system;
- one emulsifier being a polyethylene glycol, the second emulsifier consisting essentially of the reaction product of propylene glycol and ethylene oxide;
- a saturated fatty triglyceride;
- and a silane coupling agent.
2 more elements
Dependencies are inferred from the claim text.