PRODUCTION OF ELASTIC POLYURETHANE POLYMER EXCELLENT IN VISCOSITY STABILITY
There is disclosed a process for the preparation of viscosity-stable polyurethanic elastomer. The present invention pertains to an improvement in stability of viscosity of polyurethanic elastomer through the actions of a suitable catalyst for polymerization and a chain-growing agent. For the polyure...
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| creator | NIN DAIU RI ZAITETSU KI EITETSU RI KOUU |
| description | There is disclosed a process for the preparation of viscosity-stable polyurethanic elastomer. The present invention pertains to an improvement in stability of viscosity of polyurethanic elastomer through the actions of a suitable catalyst for polymerization and a chain-growing agent. For the polyurethanic elastomer, a prepolymer which is obtained by reacting a diol component consisting of a low molecular weight diol compound having an average number of molecular weight of 50 to 500 and a high molecular weight diol compound having an average number of molecular weight of 1000 to 3000 with an excess of diisocyanate compound in the presence of suitable catalyst cf metallic compound is elongated by the action of chain-growing agent. This elongation of the prepolymer is stopped by adding a monoamine compound, a chain-growth stopper, followed by addition of light stabilizer. Without degradation of intrinsic physical properties including elongation, tensile strength and elastic recovery, it is capable of remarkably improving thermal resistance and viscosity stability. |
| format | Patent |
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The present invention pertains to an improvement in stability of viscosity of polyurethanic elastomer through the actions of a suitable catalyst for polymerization and a chain-growing agent. For the polyurethanic elastomer, a prepolymer which is obtained by reacting a diol component consisting of a low molecular weight diol compound having an average number of molecular weight of 50 to 500 and a high molecular weight diol compound having an average number of molecular weight of 1000 to 3000 with an excess of diisocyanate compound in the presence of suitable catalyst cf metallic compound is elongated by the action of chain-growing agent. This elongation of the prepolymer is stopped by adding a monoamine compound, a chain-growth stopper, followed by addition of light stabilizer. 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The present invention pertains to an improvement in stability of viscosity of polyurethanic elastomer through the actions of a suitable catalyst for polymerization and a chain-growing agent. For the polyurethanic elastomer, a prepolymer which is obtained by reacting a diol component consisting of a low molecular weight diol compound having an average number of molecular weight of 50 to 500 and a high molecular weight diol compound having an average number of molecular weight of 1000 to 3000 with an excess of diisocyanate compound in the presence of suitable catalyst cf metallic compound is elongated by the action of chain-growing agent. This elongation of the prepolymer is stopped by adding a monoamine compound, a chain-growth stopper, followed by addition of light stabilizer. Without degradation of intrinsic physical properties including elongation, tensile strength and elastic recovery, it is capable of remarkably improving thermal resistance and viscosity stability.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS |
| title | PRODUCTION OF ELASTIC POLYURETHANE POLYMER EXCELLENT IN VISCOSITY STABILITY |
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