JPH0138129B

• Main Authors: NAKA SATSUJI, YOKONO ATARU, GOTO MASAO, HYOSHI YASUO, TSUJIKU SUSUMU
• Format: Patent
• Language: English
• Published: 11.08.1989
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE:To obtain the titled substance which scarcely leaves fins on the mold surface and can be released from the mold within a short time, by mixing an isocyanate with a specified polyether contg. active hydrogen, a blowing agent, a catalyst, etc., and foaming and setting the mixture within a sealed mold at 55- 80 deg.C. CONSTITUTION:A component comprising a polyol, average OH value 380-760mg KOH, containing above 5wt% polyol having a group derived by adding an alkylene oxide to an aliphatic amine, and represented by formulaI, wherein R is H or alkyl and n is a natural number, a catalyst which is a salt of a tert. amine having a hetero ring in the molecule, and a blowing agent (e.g., low-boiling halogenated hydrocarbon) is collided and mixed with a polyisocyanate[e.g., formula II (l is 0.3-0.8), a compound having at least 10% carbodiimidated MDI]. The purpose substance is obtained by injecting the mixture into a sealed mold at 55-80 deg.C and forming and setting the mixture. Here, if the above polyol is used in admixture with 20-80wt% second polyol of formula III, the mold release time is further shortened.