Binder and binder-based size for mineral fibers

Glass manufacturing – Processes – Forming product or preform from molten glass

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65 44, 427386, 4274073, 4273898, 428268, 428273, 428285, 428288, 428290, 428392, 428417, 428426, C03C 2502

Patent

active

051786575

ABSTRACT:
A method of sizing insulating glass fibers, comprising: preparing glass fibers by a high temperature aerodynamic procedure in which glass fibers are drawn out by a gas current and collected in a hood; spraying a size diluted in water onto said glass fibers in said collection hood, said size consisting essentially of an epoxy resin, an amino hardening agent and, as additives, 0.1 to 2.0% of a silane and 0 to 15% of a mineral oil, each calculated on 100 parts of dry resin, wherein said epoxy resin is a condensation product of epichlorohydrin and bisphenol A having a polymerization index n of less than 1 and the equivalent molar mass of the hardening agent is less than 100 g and said size is free of formaldehyde and components which release formaldehyde when baked; and recovering a sized insulating glass fiber product.

REFERENCES:
patent: 2707690 (1955-05-01), Pearson
patent: 4330444 (1982-05-01), Pollman
patent: 4358502 (1982-11-01), Dunbar
patent: 4487797 (1984-12-01), Watson
patent: 5024890 (1991-06-01), Pollet et al.
patent: 5026410 (1991-06-01), Pollet et al.
"Handbook of Epoxy Resins" Henry Lee, N.Y. 1967, pp. 10-16, Chapter 10.

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