Polyester type polyurethane micropore elastomer added with low cost polycarbonate polyatomic alcohol and preparation thereof

Abstract

The invention relates to a polyester type cellular polyurethane elastomer and a preparation method thereof, wherein, the elastomer is used to produce a shoe sole and is added with low-cost polycarbonate polyol. The preparation of an A composition by unit weight portion comprises the following steps that: 10 to 90 weight portions of the low-cost polycarbonate polyol, 90 to 10 weight portions of ordinary polyester polyol, 5 to 30 weight portions of chain extendor, 0 to 10 weight portions of cross-linking agent, 0.2 to 10 weight portions of tertiary amine or organic metallic catalyst, 0.2 to 2.5 weight portions of organic silicon foam stabilizer, and 0.01 to 5 weight portions of water / physical foaming agent are added into a reaction kettle, fully mixed for 2 to 4 hours, discharged, hermetically preserved, and the A composition is obtained; (2) the preparation of a B composition by unit weight portion comprises the following steps that: 40 to 80 weight portions of isocyanate, 60 to 20 weight portions of ordinary polyester polyol, and a proper amount of secondary reaction arrester are added into the reaction kettle and react for 2 to 3 hours at a temperature of between 60 and 80 DEG C, air bubbles are removed under vacuum, the temperature is reduced to be between 40 and 45 DEG C to discharge, the content of dissociative-NCO is analyzed, and the sealing preservation is performed; and (3) the preparation of the cellular polyurethane elastomer comprises the following steps that: the temperature of the A composition is maintained to be between 40 and 45 DEG C, the temperature of the B composition is maintained to be between 40 and 45 DEG C, the ratio between the mole number of active hydrogen of the A composition to the mole number of -NCO of the B composition is adjusted to be 100 to 100, and the two compositions are fully mixed and are injected into a mold for reaction molding.

Description

technical field [0001] The invention relates to a polyester polyurethane microporous elastomer added with low-cost polycarbonate polyol for making shoe soles and a preparation method, which belongs to the field of polymer material manufacturing. Background technique [0002] Polyurethane is a new type of polymer material with excellent performance. It is the fifth largest plastic after polyethylene, polyvinyl chloride, polypropylene and polystyrene. It has the dual advantages of rubber and plastic and is widely used in synthetic fibers and shoemaking. Industry, automobile industry, building materials and other fields, especially in the shoe industry has become an important consumer industry of polyurethane products, because the polyurethane microcellular elastomer used to produce shoe soles has light weight, non-slip, good elasticity, high strength, Wear-resistant, oil-resistant and other advantages are replacing rubber as the best choice for shoe sole materials. There are m...

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Problems solved by technology

[0004] Patent CN1314723C discloses a production method of polyurethane microcellular elastomer, CN1982351A discloses a preparation method of NDI-based polyurethane microcellular elastomer, and CN1982352A discloses a preparation method of MDI-based polyurethane microcellular elastomer, but the microcellular elasticity prepared by these methods The body is used in damping and shock absorbing components. It pays attention to the physical properties such as rebound and compression denaturation of the material. Most of the raw materials used, such as NDI, polycaprolactone, polytetrahydrofuran, etc., are relatively expensive, and are widely used in the application of shoe sole materials. larger limit

[0005] Patent CN1887930A discloses a polyurethane microcellular elastomer composite material and its preparation method; CN101165094A discloses a polyurethane microcellular elastomer composite material suitable for insoles and its preparation method; Methods for the mechanical properties of polyurethane microcellular elastomers, but the polyol components used in these preparation methods are polyether polyols. Compared with polyester polyol-based polyurethane materials, there are defects in physical properties such as tensile strength. It is difficult to reduce the density in the application of sole materials, thus increasing the cost of sole materials

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