Stock material or miscellaneous articles – Hollow or container type article – Cellular material derived from plant or animal source
Patent
1977-07-06
1978-02-28
Cannon, J.C.
Stock material or miscellaneous articles
Hollow or container type article
Cellular material derived from plant or animal source
5230913, 5230916, 138129, 138DIG2, 138DIG7, 156173, 242 722, 264257, 264331, 264DIG53, 428 36, 428268, 428290, 428292, 428529, B29F 2312, B65H 8106, E04C 222, F16L 904, F16L 912, F16L 916
Patent
active
040768732
ABSTRACT:
A resinous product has high resistance to flame spread, good heat release and exhibits a low smoke-developed rating when exposed to flame or to indirect or radiant heat, and is flexible, tough and resistant to cracking and embrittlement upon curing. Such a product is the condensation product of resorcinol with or without included phenol, and an admixture of paraformaldehyde and furfural or furfuryl alcohol or both. The resorcinol starting material of this invention can also suitably be used in the form of a B-stage or partially cured resin of resorcinol-phenol-formaldehyde which is then condensed with the aforesaid aldehydes or such aldehyde substance and furfuryl alcohol. The product is useful in making castings or moldings which are resistant to embrittlement or cracking upon curing, and in making tough fiberglass parts, and it can contain fillers or the like. A method of making the product and articles is provided.
REFERENCES:
patent: 4053447 (1977-10-01), Shea
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