Polyurethane resin, preparation method thereof and application thereof to micro cellular elastomer

A technology of polyurethane resin and polyetherester polyol, which is applied in the field of polyurethane resin and its preparation and application in microcellular elastomers, can solve the problem of poor hydrolysis resistance, reduced service life of polyurethane microcellular elastomers, and easy occurrence of Hydrolysis and other problems, to achieve the effect of improving molding hardness, high hardness, and improving porosity

Active Publication Date: 2016-04-20
ZHEJIANG HUAFON NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned documents and patents use polyester polyol or polyester polyol and grafted polymer polyester polyol as the soft segment to prepare low-density polyurethane microcellular elastomer, wherein the presence of a large number of ester groups makes the hydrolysis resistance of the material worse, It is prone to hydrolysis in a humid environment, reducing the service life of polyurethane microcellular elastomers

Method used

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  • Polyurethane resin, preparation method thereof and application thereof to micro cellular elastomer
  • Polyurethane resin, preparation method thereof and application thereof to micro cellular elastomer
  • Polyurethane resin, preparation method thereof and application thereof to micro cellular elastomer

Examples

Experimental program
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Effect test

Embodiment 1

[0039] (1) Crude production of polyether ester polyols: 70kg polyoxypropylene diols with a number average molecular weight of 700, 42.0kg phthalic anhydride, and 0.035 Kg double metal cyanide complex catalyst, start stirring and heat up to 120°C, then add 14.0kg of propylene oxide, undergo high-pressure 0.1MPa ring-opening polymerization for 4 hours, and vacuumize to remove unreacted propylene oxide after the reaction is completed , and lower the temperature to 75°C and put in 0.21kg NaOH, raise the temperature to 100°C, vacuumize and dehydrate for 3h, then add 30.0kg of ethylene oxide, react for 2h, after the reaction is completed, vacuumize and remove unreacted ethylene oxide to obtain crude Polyetherester polyol.

[0040] (2) Refining of polyether ester polyol: Take 100 kg of crude polyether ester polyol obtained in step (1), add 3.0 kg of deionized water, heat up to 60°C and stir for 1 hour, add 0.2 kg of phosphoric acid, stir for 1.5 hours, then add 1.0kg of magnesium he...

Embodiment 2

[0042] (1) Crude production of polyether ester polyols: 100 kg of polyoxypropylene diols with a number average molecular weight of 1000, 60 kg of phthalic anhydride, and 0.050 kg For the double metal cyanide complex catalyst, start stirring and heat up to 140°C, then add 90kg of propylene oxide, undergo a high-pressure 0.3MPa ring-opening polymerization reaction for 2 hours, vacuumize the unreacted propylene oxide after the reaction is completed, and Lower the temperature to 85°C and put in 1.0kg of basic catalyst, raise the temperature to 120°C, vacuumize and dehydrate for 1h, then add 60kg of ethylene oxide, and react for 1h, after the reaction is completed, vacuumize to remove unreacted ethylene oxide to obtain crude Polyetherester polyol.

[0043] (2) Refining of polyether ester polyol: take 100 kg of crude polyether ester polyol obtained in step (1), add 10.0 kg of deionized water, heat up to 70°C and stir for 0.5 h, then add 1.0 kg of phosphoric acid, and stir for 1.5 h ...

Embodiment 3

[0045](1) Crude production of polyether ester polyols: 100kg polyoxypropylene-oxyethylene glycol, 20kg phthalic anhydride with a number average molecular weight of 1000 and 20kg phthalic anhydride are added successively in a reaction kettle with a stirring and temperature control device, 0.040kg of double metal cyanide complex catalyst, start stirring and raise the temperature to 130°C, then add 75kg of propylene oxide, undergo a high-pressure 0.2MPa ring-opening polymerization reaction for 3 hours, and vacuumize the unreacted propylene oxide after the reaction is completed. And lower the temperature to 80°C and put in 0.40kg of basic catalyst, raise the temperature to 110°C, vacuumize and dehydrate for 2h, then add 20kg of ethylene oxide, react for 2h, after the reaction is completed, vacuumize to remove unreacted ethylene oxide to obtain Crude polyetherester polyol.

[0046] (2) Refining of polyether ester polyol: take 100 kg of crude polyether ester polyol obtained in step ...

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Abstract

The invention discloses polyurethane resin, a preparation method thereof and application thereof to a micro cellular elastomer. The polyurethane resin comprises a polyurethane resin component A and a polyurethane resin component B; the polyurethane resin component A and the polyurethane resin component B comprise polyether ester polyol; a ratio of a mole number of active hydrogen in the component A to a mole number of -NCO in the component B is 1:1. The polyether ester polyol is a reaction product of polyether polyol, phthalic anhydride, a double-metal cyanide complex catalyst, epoxypropane, ethylene oxide and a basic catalyst. According to the polyurethane resin and the preparation method and the application thereof, which are disclosed by the invention, under the condition of not adding an open-hole agent and graft polymer polyol, the polyurethane micro cellular elastomer with a low forming density, a high hardness, low shrinkage, high tensile strength and tearing strength, excellent hydrolysis resistance and excellent wear resistance can be prepared, and not only hydrolysis resistance and a forming hardness of the polyurethane micro cellular elastomer are improved, but also the open taphole of the polyurethane micro cellular elastomer is improved, so that cells of the polyurethane micro cellular elastomer are fine and uniform, and shrinkage is low.

Description

technical field [0001] The invention relates to a polyurethane resin, its preparation method and its application in low-density and low-shrinkage polyurethane microporous elastomer. Background technique [0002] Polyurethane microcellular elastomer is a micro-foamed polyurethane material with a density between foam and solid core materials and a pore size of 0.1-10 μm. It takes into account light foam, good impact resistance, energy absorption, good cushioning performance, and wear resistance. Excellent characteristics, widely used in shoemaking, shock-absorbing materials, seals, load-bearing tires, etc. The sole made of polyurethane microporous elastomer is easy to process and shape, soft to the touch, comfortable to wear, elastic and non-slip. With the demand for lightweight polyurethane microcellular elastomers, especially shoes, reducing the molding density and cost while maintaining good physical properties of polyurethane microcellular elastomers has become the develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/26C08G18/66C08G18/42C08G18/48C08G18/32C08G18/12C08J9/14C08J9/08
CPCC08G18/12C08G18/3206C08G18/4018C08G18/4202C08G18/4804C08G18/4845C08G18/6607C08G65/2615C08J9/08C08J9/144C08J2375/08
Inventor 林孝杰赵叶宝薛晓金帅丰平陈俊林孝宾
Owner ZHEJIANG HUAFON NEW MATERIALS CO LTD
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