摘要:
The present invention produces the hydraulic powder through grinding of the hydraulic compound in the presence of a compound (a) prepared by reacting (A) at least one compound selected from polyhydric alcohols and alkylene oxide adducts thereof with (B) a sulfating agent.
摘要:
The present invention produces the hydraulic powder through grinding of the hydraulic compound in the presence of a compound (a) prepared by reacting (A) at least one compound selected from polyhydric alcohols and alkylene oxide adducts thereof with (B) a sulfating agent.
摘要:
A polyester-polyol being liquid at 40° C. and having a viscosity of not more than 10,000 mPa·s at 60° C., prepared by polycondensation of an acid component including at least one phthalic acid component selected from phthalic anhydride and o-phthalic acid, and an aliphatic polybasic acid, with a polyhydric alcohol; a process for preparing a polyurethane foam including reacting a polyisocyanate component with a polyol component including the polyester-polyol; a process for preparing an isocyanate prepolymer from a polyisocyanate component and a polyol component including the polyester-polyol; and a process for preparing a polyurethane foam including reacting an isocyanate prepolymer prepared from a polyisocyanate component and a polyol component including the polyester-polyol, with a polyol component. The resulting polyurethane foam shows remarkably improved physical properties such as tensile strength and tear strength, while having low density, acceptable appearance and texture.
摘要:
A polyester-polyol prepared by polycondensation of an acid component comprising terephthalic acid and adipic acid, and a polyhydric alcohol component, wherein the molar ratio of the terephthalic acid/adipic acid is 0.05 to 0.3; a process for preparing a polyurethane foam comprising reacting a polyisocyanate component and a polyol component, wherein the polyol component contains the above polyester-polyol; and a process for preparing a polyurethane foam comprising reacting an isocyanate prepolymer made of a polyisocyanate component and a polyol component (I) with a polyol component (II), wherein the polyol component (I) comprises the above polyester-polyol.
摘要:
The present invention provides the early strengthening agent for hydraulic compositions containing a compound (a) obtained by reacting (A) one or more compounds selected from polyhydric alcohols having 3 to 20 hydroxy groups and alkylene oxide adducts thereof with (B) a sulfating agent, and the additive composition for hydraulic compositions containing the compound (a).
摘要:
Microcellular polyurethane elastomer shoe sole components having exceptional physical properties may be prepared from isocyanate-terminated prepolymers derived from polyoxypropylene diols having a molecular weight of from about 2000 Da to 8000 Da, an unsaturation less than about 0.02 meq/g, and a random oxyethylene content of from about 5 to about 15 weight percent. The shoe sole components exhibit high tensile strength, elongation, resilience, and in addition have excellent tear strength, particularly 90° angle tear.
摘要:
A process for preparing a polyurethane foam comprising, reacting a polyol composition comprising a polyol component containing a polyoxypropylene-based polyol having an unsaturation degree of not more than 0.06 meq/g, a catalyst and water with a polyisocyanate compound. The polyurethane foam can be suitably used as shoe soles and the like.
摘要:
The present invention provides a method and apparatus for detecting the end point of a process by monitoring the position of a valve during the process. In one aspect, a cleaning process is performed in the chamber, and a controller monitors the valve position to determine the end point of the process which corresponds to a decrease in the number of steps in the valve position required to achieve a stable throttle valve position after the cleaning process is complete.
摘要:
A urethane foam for shoe soles prepared by reacting a compound having at least two isocyanate-reactive hydrogen atoms and a molecular weight of 400 to 10000 with a polyisocyanate in the presence of a foam stabilizer, water and a catalyst, characterized in that the ratio r.sub.1 /r.sub.2 of a mean skill cell diameter r.sub.1 to a mean core cell diameter r.sub.2 is 0.02 to 0.80, wherein the mean skin cell diameter r.sub.1 is defined as the mean diameter of the cells which form the skin portion of a urethane foam extending from the surface to a depth of 5% of the foam thickness and the mean core cell diameter r.sub.2 is defined as the mean diameter of the cells which form the core portion of a urethane foam extending from a depth of 40% to a depth of 60% of the foam thickness.
摘要:
The present invention provides the early strengthening agent for hydraulic compositions containing a compound (a) obtained by reacting (A) one or more compounds selected from polyhydric alcohols having 3 to 20 hydroxy groups and alkylene oxide adducts thereof with (B) a sulfating agent, and the additive composition for hydraulic compositions containing the compound (a).