| 摘要 |
A rigid polyurethane foam includes the reaction product of an isocyanate and an isocyanate reactive component in the presence of a blowing agent. The isocyanate reactive component includes an aromatic polyester polyol, a rigid polyol, and an aliphatic polyester polyol. The rigid polyurethane foam has a tensile adhesion of greater than 35 kPa (5 psi) when disposed on a metal substrate or a polyester, polyurethane, or epoxy coated metal substrate, each having a substrate temperature of greater than 41° C. (105° F.), and tested in accordance with ASTM D1623-09. A method of forming a composite article comprising a substrate and the rigid polyurethane foam includes the steps of combining the isocyanate reactive component and the isocyanate in the presence of the blowing agent to form a reaction mixture and applying the reaction mixture to the substrate having a substrate temperature of greater than 41° C. (105° F.) to form the composite article. |
| 主权项 |
1. A rigid polyurethane foam comprising the reaction product of:
(A) an isocyanate reactive component comprising;
(i) an aromatic polyester polyol;(ii) a rigid polyol; and(iii) an aliphatic polyester polyol;wherein said aliphatic polyester polyol is present in said isocyanate reactive component in an amount of from 2 to 10 parts by weight, based on 100 parts by weight of the total weight of said polyols present in said isocyanate reactive component; and (B) an isocyanate; in the presence of (C) a blowing agent; wherein said rigid polyurethane foam has a tensile adhesion of greater than 35 kPa (5 psi) when disposed on a metal substrate, a polyester coated metal substrate, a polyurethane coated metal substrate, or an epoxy coated metal substrate, each having a substrate temperature of greater than 41° C. (105° F.), and tested in accordance with ASTM D1623-09. |
