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Rigid polyurethane foams with even cell size distribution and homogeneous open cell structure
Rigid polyurethane foams with even cell size distribution and homogeneous open cell structure
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机译：具有均匀泡孔尺寸分布和均匀开孔结构的硬质聚氨酯泡沫
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摘要
A rigid polyurethane foam comprises 50 vol.% or more open-cell based on DIN ISO 4590-86 and with a uniform cell structure, and is obtained by reacting an organic polyisocyanate component (A) comprising 0-10 wt.% 2,2'-diphenyl-methane diisocyanate (A1), 0-30 wt.% 2,4'-diphenyl-methane diisocyanate (A2) and 25-75 wt.% 4,4'-diphenylmethane diisocyanate (A3), with a component (B) containing 20-70 wt.% polyoxyalkylene polyol (B1) having a hydroxyl number of 25-60 mg potassium hydroxide/g and a number-average functionality of 2-4, 20-50 wt.% polyoxypropylene polyol (B2). A rigid polyurethane foam comprises 50 vol.% or more open-cell based on DIN ISO 4590-86 and with a uniform cell structure, and is obtained by reacting an organic polyisocyanate component (A) comprising 0-10 wt.% 2,2'-diphenyl-methane diisocyanate (A1), 0-30 wt.% 2,4'-diphenyl-methane diisocyanate (A2) and 25-75 wt.% 4,4'-diphenylmethane diisocyanate (A3), with a component (B) comprising 20-70 wt.% polyoxyalkylene polyol (B1) having a hydroxyl number of 25-60 mg potassium hydroxide/g and a number-average functionality of 2-4, 20-50 wt.% polyoxypropylene polyol (B2) having a hydroxyl number of 300-900 mg potassium hydroxide/g and a number-average functionality of 2.5-4, 0-25 wt.% polyoxyalkylene polyol (B3) having a hydroxyl number of 150-550 mg potassium hydroxide/g and a functionality of 2, 0-20 wt.% polyol (B4) containing an ester group and having a hydroxyl number of 200-500 mg potassium hydroxide/g and a number-average functionality of 2-5, 0.1-15 wt.% propylene oxide-ethylene oxide copolymer (B5) having a hydroxyl number of 25-200 mg potassium hydroxide/g and a functionality of 5-8, 0-3 wt.% of glycerol (B6), 1-7 wt.% of water (B7), 0.5-4 wt.% catalyst (B8), optionally an auxiliary and/or an adjuvant (B9), and has isocyanate index of 85-125. The total content of components (B1) to (B9) is 100 wt.%. An independent claim is included for production of composite element or sandwich structure, which involves using the rigid polyurethane foam.
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机译：硬质聚氨酯泡沫材料包含50％（体积）或更多的基于DIN ISO 4590-86的开孔且具有均匀的孔结构，并且是通过使包含0-10 wt。％的2,2的有机多异氰酸酯组分（A）反应获得的'-二苯基甲烷二异氰酸酯（A1），0-30 wt。％的2,4'-二苯基甲烷二异氰酸酯（A2）和25-75 wt。％的4,4'-二苯基甲烷二异氰酸酯（A3） B）含有20-70wt。％的聚氧化烯多元醇（B1），其羟值为25-60mg氢氧化钾/ g，且数均官能度为2-4，20-50wt。％的聚氧化丙烯多元醇（B2）。硬质聚氨酯泡沫材料包含50％（体积）或更多的基于DIN ISO 4590-86的开孔且具有均匀的孔结构，并且是通过使包含0-10 wt。％的2,2的有机多异氰酸酯组分（A）反应获得的'-二苯基甲烷二异氰酸酯（A1），0-30 wt。％的2,4'-二苯基甲烷二异氰酸酯（A2）和25-75 wt。％的4,4'-二苯基甲烷二异氰酸酯（A3） B）包含20-70重量％的羟值为25-60mg氢氧化钾/ g和2-4的数均官能度的聚氧化烯多元醇（B1），其中20-50重量％的聚氧化丙烯多元醇（B2）具有羟基数为300-900 mg氢氧化钾/ g，数均官能度为2.5-4，0-25 wt。％的聚氧化烯多元醇（B3），羟基数为150-550 mg氢氧化钾/ g 2，2，0-20 wt。％含酯基且羟基数为200-500 mg氢氧化钾/ g和2-5的数均官能度的多元醇（B4），0.1-15 wt。％环氧丙烷-环氧乙烷羟基数为25-200 mg氢氧化钾/ g和官能度为5-8的共聚物（B5），0-3％（重量）的甘油（B6），1-7％（重量）的水（B7），0.5 -4重量％的催化剂（B8），任选地是辅助和/或助剂（B9），并且异氰酸酯指数为85-125。组分（B1）至（B9）的总含量为100重量％。包括用于生产复合元件或夹层结构的独立权利要求，涉及使用硬质聚氨酯泡沫。
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