公开(公告)号：US4489175A

公开(公告)日：1984-12-18

申请号：US489556

申请日：1983-04-28

Applicant: Heinz Baumann ,  Rembert Baumann

Inventor： Heinz Baumann ,  Rembert Baumann

IPC: C08G12/00 ,  C08G12/12 ,  C08J9/30

CPC classification number: C08J9/30 ,  C08K5/21 ,  C08K5/42 ,  C08J2361/24

Abstract: To obtain a UF foam which is low in formaldehyde, yet is dimensionally stable, up to 96% urea is dissolved in an approximately 10 to 30% aqueous extract of an alkyl, aryl or alkaryl sulphonic acid, said solution being mixed with a conventional hardener/foaming agent solution containing the sodium salt of an alkyl, aryl or alkaryl sulphonic acid in an aqueous diluent usually employed for foaming, in a ratio sulphonic acid solution to sodium sulphonate solution of 1:1 to 1:4, the pH value being adjusted to 0 up to 3 and said mixture being foamed together with a urea formaldehyde resin precondensate solution in the usual manner.

Abstract translation: 为了获得甲醛低的尺寸稳定的UF泡沫，将高达96％的尿素溶解在烷基，芳基或烷芳基磺酸的约10至30％的水提取物中，所述溶液与常规的固化剂 /含有通常用于发泡的水性稀释剂中的烷基，芳基或烷芳基磺酸的钠盐的发泡剂溶液，其比例为1：1至1：4的磺酸溶液与磺酸钠溶液的比例，调节pH值 至0至3，并且所述混合物以通常的方式与尿素甲醛树脂预缩合溶液一起发泡。