US 7,611,598 B2 · Method of forming a reinforced article

Abstract

An aqueous glass fiber sizing composition that includes a polymeric film forming component, at least one silane coupling agent, and one or more lubricants is provided. The polymeric film forming component of the sizing composition includes a silanated polyvinyl acetate, an epoxidized polyvinyl acetate, and a modified epoxy emulsion. In preferred embodiments, the film formers are present in the sizing composition in ratios of 70:25:5, 50:25:25, or 63:18:18 of silanated polyvinyl acetate, epoxidized polyvinyl acetate, and modified epoxy emulsion respectively. Fibers sized with the sizing composition in a sheet molding compound process have improved wet-out characteristics.

Claims13

Dependent claims

A method of forming a reinforced composite article comprising the steps of:

depositing chopped glass fibers at least partially coated with a sizing composition on a first polymer film, said sizing composition including:
a film forming polymer component including:
a silanated polyvinyl acetate;
an epoxidized polyvinyl acetate;
and
a modified epoxy emulsion;
at least one silane coupling agent;
and
one or more lubricants;
positioning a second polymer film on said chopped glass fibers to form a sandwiched material;
and
molding said sandwiched material into a reinforced composite article,
wherein said silanated polyvinyl acetate is present in said film forming polymer component in an amount that is greater than said epoxidized polyvinyl acetate and said modified epoxy emulsion.

10 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/638,939Filed 14 Dec 2006 · division

Priority

21 Jun 2004

Published

US 2007/0134490 A114 Jun 2007

Granted

3 Nov 2009

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

C03C 25/26
Coatings containing organic materials: macromolecular compounds or prepolymers
B29C 70/50
Shaping or impregnating by compression not applied: for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or…
C03C 25/28
Macromolecular compounds or prepolymers: obtained by reactions involving only carbon-to-carbon unsaturated bonds
C03C 25/36
Obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds: epoxy resins

Method of forming a reinforced article

Life of this patent

Method of forming a reinforced article

Life of this patent

Abstract

Claims13