摘要:
A system for use in making molded polyurethane objects by an open or closed casting process, said system comprising
(A) an aromatic polyisocyanate; and (B) an active hydrogen-containing composition comprising
(i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4; (ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and (iii) a secondary monoamine of the formula R-NH-Rʹ wherein R and Rʹ are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that said secondary monoamine contains at least 4 carbon atoms.
摘要翻译:一种用于通过开放或封闭浇铸工艺制造模制聚氨酯物体的系统,所述系统包括(A)芳族多异氰酸酯; 和(B)含活性氢的组合物,其包含(i)平均分子量在约1000至约8000范围内且平均官能度为约2至约4的多元醇; (ii)具有2至12个碳原子并且平均官能度为约2至约3的多元醇; 和(iii)式R-NH-R'的仲单胺,其中R和R'独立地为具有1至20个碳原子的饱和脂族基团,条件是所述仲胺含有至少4个碳原子。 G
摘要:
A system for use in making molded polyurethane objects by an open or closed casting process, said system comprising (A) an aromatic polyisocyanate; and (B) an active hydrogen-containing composition comprising (i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4; (ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and (iii) a secondary monoamine of the formula R-NH-Rʹ wherein R and Rʹ are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that said secondary monoamine contains at least 4 carbon atoms.