Method of forming glass fiber
AssigneePPG Industries, Inc.
InventorDonald L. Motsinger
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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
In the method of forming glass fiber strands useful for the reinforcement of resinous articles which comprises drawing glass streams through orifices in a bushing to form individual glass fibers, moving the fibers away from the bushing at a high rate of speed, applying an aqueous sizing solution thereto while they are moving at this speed and gathering the fibers into the form of the strand the improvement comprising:
- applying as the aqueous sizing solution an aqueous sizing composition comprising a phenolic epoxy resin;
- the reaction product of a partial ester of a polycarboxylic acid containing one or more unesterified carboxyl groups with a compound containing more than one epoxy group;
- a dual component emulsifier system having therein a polyethylene glycol emulsifier and a second emulsifier consisting essentially of the reaction product of propylene glycols and ethylene oxide;
- a silane coupling agent and a saturated fatty triglyceride.
Dependencies are inferred from the claim text.