Storage stability emulsions for making micro-bubble rigid foams based on isocyanates

摘要

The blowing agent-containing emulsions of the present invention comprise a) compounds containing hydrogen atoms reactive to isocyanates, b) blowing agents, c) catalysts, adjuvants and additives customary in the field of polyurethane chemistry, wherein said blowing agents are Polyester alcohols present as an emulsion in components a) and c) and having the structure of formula (1) are used as emulsifying aids,;Formula 1;Where m = 0-15, n = 0-1, o = 0-15, p = 0-1, q = 0-15, r = 0-1, s = 0-15, t = 0-1 , a mixture of 1-3 for u = 0-10, v = 0-15, x = 1-5, y = 1-4 or r + n ≠ 0, z = 0-3, z _i = 0.1-3 ego,;R ¹ is a polyhydric alcohol, preferably ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propylene glycol and dipropylene glycol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol, 1, Aliphatic structure without hydroxyl group based on the structure of 3-butanediol, trimethylolpropane, trimethylol ethane, glycerol, pentaerythritol, wherein the material may be used as any mixture with others in the esterification and thus , R ₁ may be a mixture of the corresponding structure),;R ₂ is a radical of a polycarboxylic acid free of COOH groups, for example adipic acid, terephthalic acid, o-phthalic acid,;R ₃ is an alcohol radical such as R ₁ .