Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1967-02-13
1976-01-06
Welsh, M. J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 25AJ, 260 25AT, 260 775NC, C08G 1814
Patent
active
039310655
ABSTRACT:
This invention relates to polyurethane-modified polyisocyanurate foam having excellent flame-resistivity and non-combustibility, which is prepared from (A) at least one aromatic polyisocyanates having no ortho-substituent, (B) at least one polyhydroxyl and/or polycarboxyl compound, (C) at least one foaming agent and (D) at least one catalyst used for the trimerization of isocyanate groups. The proportions of these components satisfy the relationships: (1) the equivalent ratio, Ae/(Be+Ce+De), is more than two, and (2) the weight ratio, Bw/Aw is less than 0.4 and more than zero, wherein A, B, C and D represent the above mentioned components respectively, e represents the number of chemical equivalents, w represents the weight of the components and the factors and Ce and De are eliminated from the relationships when components C and D do not react with the component A.
REFERENCES:
patent: 3179626 (1965-04-01), Beitchmann
patent: 3206352 (1965-09-01), Collis et al.
patent: 3211704 (1965-10-01), Gilman et al.
patent: 3252942 (1966-05-01), France et al.
patent: 3516950 (1970-06-01), Haggis
Ashida Kaneyoshi
Yagi Takao
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Nisshin Boseki Kabushiki Kaisha
Welsh M. J.
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