Abstract Individual glass fibers are coated with a combined aqueous sizing and coating composition that includes a resorcinolformaldehyde resin solution admixed with a styrene-butadienevinylpyridine terpolymer latex. A coupling agent containing a hydrolizable amino-functional silane, ammonia and an ammonia soluble carboxyl-containing polymer is admixed with the resin and latex to form an aqueous combined sizing and coating composition. The individual glass fibers are coated shortly after attenuation and thereafter are gathered into strands. The strands are dried while spaced from each other and then collected on a forming tube. The coated strands are used as glass fiber reinforcement for elastomeric products. The presence of the ammonia-soluble carboxyl-containing polymer in the coupling agent stabilizes the coupling agent so that the coupling agent does not cause precipitation of the resin-latex mixture when admixed therewith. The resin, latex and coupling agent can be applied as a combined sizing and coating in a one step coating process.
AN AQUEOUS COMBINED SIZING AND COATING COMPOSITION FOR GLASS FIBERS COMPRISING: 3 TO 15 PERCENT BY WEIGHT OF A CINOL-FORMALDEHYE RESIN; 20 TO 70 PERCENT BY WEIGHT OF A STYRENE-BUTADIENE-VINYLPYRIDINE TERPOLYMER LATEX; 0.01 TO 3 PERCENT OF AN AMINO FUNCTIONAL HYDROLIZABLE SILANE COUPLING AGENT SELECTED FROM COMPOUNDS HAVING THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
51 words
AN AQUEOUS COMBINED SIZING AND COATING COMPOSITION FOR GLASS FIBERS COMPRISING: 3 TO 15 PERCENT BY WEIGHT OF A CINOL-FORMALDEHYE RESIN; 20 TO 70 PERCENT BY WEIGHT OF A STYRENE-BUTADIENE-VINYLPYRIDINE TERPOLYMER LATEX; 0.01 TO 3 PERCENT OF AN AMINO FUNCTIONAL HYDROLIZABLE SILANE COUPLING AGENT SELECTED FROM COMPOUNDS HAVING THE STRUCTURAL FORMULA
Claim 3
Dependent Claim
24 words
An aqueous combined sizing and coating composition as set forth in claim 1 in which said amino functional hydrolizable silane coupling agent includes gamma-aminopropyltriethoxysilane.
Claim 4
Independent Claim
90 words
A method of making an aqueous combined sizing and coating composition for glass fibers for use in reinforcing elastomeric materials comprising, forming an aqueous mixture of a resorcinol-formaldehyde resin, forming an aqueous mixture of a vinylpyridine polymer latex, adding the resorcinol-formaldehyde resin mixture to the vinylpyridine polymer latex, aging the mixture of said resin and latex for at least 2 hours, forming an aqueous mixture of ammonia, an aminofunctional hydrolizable silane coupling agent, and an ammonia-soluble carboxyl-containing polymer, adding said last-named aqueous mixture to said mixture of resin and latex.
Claim 5
Independent Claim
90 words
A method of making an aqueous combined sizing and coating composition for glass fibers for use in reinforcing elastomeric materials comprising, forming an aqueous mixture of a resorcinol-formaldehyde resin, forming an aqueous mixture of a vinylpyridine polymer latex, adding the resorcinol-formaldehyde resin mixture to the vinylpyridine polymer latex, aging the mixture of said resin and latex for at least 2 hours, forming an aqueous mixture of ammonia, an aminofunctional hydrolizable silane coupling agent, and an ammonia-soluble carboxyl-containing polymer, adding said last-named aqueous mixture to said mixture of resin and latex.