C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/1326, 400/50
C08L 1/08 (2006.01) C03C 25/26 (2006.01) C08L 29/04 (2006.01) C08L 39/06 (2006.01) D21H 13/40 (2006.01)
Patent
CA 2039926
The chemical composition of the present invention is capable of forming a water soluble but curable film on fibers treated with the aqueous chemical composition to produce wet chopped strands of the fibers. In one aspect the chemical composition has a water soluble film-forming polymer with an intrinsic viscosity less than around 150 centipoise present in an effective amount to form a water soluble film. Tn addition the composition has at least one cationic lubricant or lubricating surfactant, polymer matrix-compatible organo silane coupling agents, epichlorohydrin polyamide adduct, and water. The film forming polymer can be poly(vinylalcohol), poly(vinylpyrrolidone), or poly(hydroxyalkylcellulose) or mixtures thereof and the like. The organo silane coupling agent can be a lubricated alkoxylated gamma aminoalkyltrialkoxy silane, a polyamino organo silane, mercapto functional organo silane, vinylfunctional organo silane, or a ureido functional organo silane or a mixture thereof. The amounts of the silane, lubricant and adduct are, respectively, around 1 to 20, around 0.5 to 15 and around 0.5 to around 15 all based on the weight percent of the nonaqueous solids of the chemical composition. Glass fibers treated with the chemical composition are particularly useful as wet chopped glass fiber strands for reinforcing thermoplastic polymers, where the fiber reinforced polymer in made by a foamed wet-laid process haying the thermoplastic polymer present from particles in the pulping medium.
Borden Ladner Gervais Llp
Ppg Industries Inc.
Ppg Industries Ohio Inc.
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