Title:
MANUFACTURE OF POLYURETHANE FOAM
Document Type and Number:
Japanese Patent JPS5776021
Kind Code:
A
Abstract:
Flexible resilient flame-retardant and intumescent polyurethane foam is prepared from a reaction mixture comprising a polyester polyol, an organic polyisocyanate, a blowing agent, a surfactant, a catalyst, a melamine derivative and a flame-retardant; the melamine derivative has one or more hydrogen atoms replaced by a methylol and or lower alkoxymethyl group, the amount of flame-retardant is 20-60 parts by weight 100 parts by weight of the polyester polyol and hydrated alumina is also included in the reaction mixture. In a preferred embodiment, the hydrated alumina is predispersed in a mixture comprising the melamine derivative, the flame retardant and a low-viscosity linear polyester polyol.
Inventors:
MAIKERU PII PUKORINSUKII JIYUN
Application Number:
JP7876181A
Publication Date:
May 12, 1982
Filing Date:
May 26, 1981
Export Citation:
Assignee:
TENNECO CHEM
International Classes:
C08G18/00; C08G18/42; C08J9/00; (IPC1-7): C08G18/14; C08G18/42