Non-leachable fire retardant

Details Non-leachable fire retardant Non-leachable fire retardant

1988-09-23

1992-09-01

Henderson, Christopher

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

260DIG24, C08G 828

Patent

active

051439891

ABSTRACT:
A fusible phenolic resin and a dialkyl-N, N-bis (hydroxyalkyl) aminoalkyl phosphonate are condensed to form a water-insoluble resin having fire retardant properties. Fire resistant materials are made by causing the condensation to occur in situ when a normally flammable material and the reactants are mixed and the mixture is heated at 250.degree. F. to 480.degree. F. Wooden articles such as molded hardboard roofing shingles of this invention do not lose their fire resistance after being soaked with rain repeatedly.

REFERENCES:
patent: 3132169 (1964-05-01), Birum et al.
patent: 3192242 (1964-06-01), Birum
patent: 3297796 (1967-01-01), Smith
patent: 3306937 (1967-02-01), Clampitt et al.
patent: 3309342 (1967-03-01), Friedman
patent: 3344112 (1967-09-01), Birum et al.
patent: 4012558 (1977-03-01), Wurman
patent: 4086206 (1978-04-01), Saito
patent: 4459339 (1984-07-01), Libit

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