Sheet molding composition containing surface modified glass filler

Patent metadata

Field	Value
Publication number	US-9944788-B2
Application number	US-201514755664-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jun 30, 2014
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A molded article is provided that has a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Glass fibers are crossed linked to the resin matrix via a silane coupling agent reactive with the matrix. A molded article is provided that has a resin matrix having a surface, the resin matrix formed from cross-linked polyester resin or vinyl-ester resin. Glass fibers each covalently bonded to at least one microspheroid matrix via a silane coupling agent reactive with a surface of the at least one microspheroids are present in increase the fiber pull strength. A sizing composition for treating glass fibers is also provided for use in such articles.

First claim

The invention claimed is:

1. A molded article comprising:
a resin matrix having a surface, said resin matrix formed from cross-linked polyester resin or vinyl-ester resin;
glass fibers in said resin matrix, said resin matrix surrounding said glass fibers;
a first plurality of glass microspheroids within said resin matrix;
a first molecule of a silane coupling agent having two moieties reacted with glass surface hydroxyl groups of the glass fibers and glass microspheroids to covalently bond a first of said glass fibers to the first moiety and a first of said plurality of microspheroids to the second moiety, said silane coupling agent present in a concentration of 0.005 to 0.1 grams of said silane coupling agent per gram of said glass fibers; and
a second molecule of said silane coupling agent having two moieties reacted with glass surface hydroxyl groups of the glass fibers and glass microspheroids to covalent bond a first of said glass fibers to the first moiety and a second of said plurality of microspheroids to the second moiety.

2. The article of claim 1 wherein a first of said two moieties of said silane coupling agent is a silane moiety and a second of said two moieties of said silane coupling agent is an amine moiety.

3. The article of claim 2 further comprising a third molecule of silane coupling agent covalently bonded to one of said glass fibers or one of said plurality of microspheroids, said third molecule of silane coupling agent having a moiety of: cyano, urethane, or urea moiety reacted with said resin during cure of said resin to form said resin matrix.

Assignees

• Continental Structural Plastics Inc

Inventors

• Guha Probir Kumar
• Siwajek Michael J
• Hiltunen Michael J
• Asuncion Michael Z

Classifications

• C08J5/043

  with glass fibres · CPC title

• C08J5/045

  with vegetable or animal fibrous material · CPC title

• C08J2367/02

  Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) · CPC title

• C08L63/00 Primary

  Compositions of epoxy resins; Compositions of derivatives of epoxy resins · CPC title

• C03C25/40

  Organo-silicon compounds · CPC title