B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
400/1311, 117/43
B32B 17/04 (2006.01) C03B 37/00 (2006.01) C03C 27/10 (2006.01)
Patent
CA 1067227
ABSTRACT OF THE DISCLOSURE The production of a bonded glass fiber product is dis- closed. The steps of the method involve forming glass fibers from molten streams of glass; combining the glass fibers with a heat curable aqueous binder composition; consolidating the fibers and he?? curable aqueous binder composition into a lossely packed mass on a foraminous conveyor; and curing the heat curable binder composition in situ on the glass fiber product. The consolidated fibres can be compressed on the foraminous conveyor prior to or during curing of the binder composition, or both. The binder composition comprises: 60-95 percent by weight of a complex polymeric component formed by reacting phenol, formaldehyde, a modifier selected from the group consisting of starch and com- pounds which are degradation products of starch, and urea; 10-80 percent of urea based upon the weight of the phenol originally charged to produce the polymeric component; 0.5-25 percent of a lubricant based on the total weight of the complex polymeric component and any unreacted urea; 0.1-1 percent of a silane, based on the total weight of the complex polymeric component and any unreacted urea; 0.2-3.0 percent of an ammonium salt of a strong acid based on the total weight of the complex polymeric component and any unreacted urea, and water, to dilute the binder to a desired solids content of from 1-40 percent.
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