Boric anhydride solutions and their use as hardeners of resols

B - Operations – Transporting – 01 – J

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400/100, 252/43,

B01J 31/02 (2006.01) B01J 21/02 (2006.01) C08K 3/38 (2006.01)

Patent

CA 1117514

Abstract Concentrated boric anhydride solutions containing at least 5 percent by weight of boric anhydride, one or more organic solvents and at least one acid chosen from sulfonic acid and aromatic sulfonic acids. The solutions can be used as hardeners for resols or for resols and glass fibers.

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