POLYURETHANE FOAM

• Main Authors: TAKAGI MASAMITSU, KAWAMORI SHOICHI
• Format: Patent
• Language: English
• Published: 10.10.2001
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To obtain a urethane foam excellent in preventing yellowish discoloration affected by ultraviolet ray and NOX, and having a uniform cell structure. SOLUTION: The polyurethane foam manufactured by reacting a polyol compound with a polyisocyanate compound by specifying the polyisocyanate compound to a aliphatic and/or alicylic polyisocyanate compound modified by the mixture 50-80 wt.% of polyol and/or polythiol having tree active hydrogen atoms at the terminals with average mol.wt. of <=1,000 (A) and 50-20 wt.% of polyol and/or polythiol having two active hydrogen atoms at the terminals with average mol.wt. of <=1,000 (B), and containing 15% or mire NCO, and is, also, characterized by use of a catalyst to trimerize a isocyanate.