Copending U.S. patent application Ser. No. 06/545,422, filed Oct. 25, 1983, Brennan et al., "Mannich Condensates Having Fire Retardancy Properties and Manufacture of Rigid Polyurethane Foam Therewith". |
Copending Brennan et al., U.S. patent application Ser. No. 06/545,421, filed Oct. 25, 1983, "Modified Mannich Condensates and Manufacture of Rigid Polyurethane Foam with Alkoxylation Products Thereof". |
Copending Brennan et al., U.S. patent application Ser. No. 06/545,423, filed Oct. 25, 1983, "Mannich Condensates Having Fire Retardancy Properties and Manufacture of Rigid Polyurethane Foam Therewith". |