Elements of soft, incombustible polyurethane foam prepn. - from high mol. polyether diol or tri:ol contg. terminal hydroxy gps., bis-4-isocyanato-phenyl-methane, and trimerisation catalyst

摘要

Soft elements of polyurethane foam are prepd. by mixing (A) component comprising high mol. di- or tri-functional polyether polyol contq. at least 75-82% terminal OH gps. with (B) component comprising 4,4'-diphenylmethane di-isocyanate (I), a trimerisation catalyst (II) being present such that (I) is trimerised, a high density in spatial crosslinking of an isocyanurate is formed, and compression hardness of foam is regulated through deqree of crosslinking and (A).