Microcellular polyurethane elastomer and preparation method thereof

A technology of microcellular elastomer and polyurethane, applied in the field of polyurethane microcellular elastomer and its preparation, can solve the problems of high viscosity, increased viscosity of polyol components, mismatch of viscosity of two components, etc., and achieves high hardness and mechanical properties. performance, improve resilience, good flowability

Active Publication Date: 2011-10-12
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the product density is 0.32g/cm 3 , the hardness is 32A, the tensile strength is 3.2MPa, and the tear strength is 14N/mm; "Synthesis of polymer polyester polyol and its application in shoe soles" [C]. The thirteenth meeting of China Polyurethane Industry Association Proceedings of the Annual Conference. 2006, 167~171 Li Chunlan, Zhang Qianhe and others prepared a high hardness and high strength polyurethane microporous material for shoe soles by adding polymer polyester polyol, with a density of 0.38g/cm 3 , the hardness reaches 71A, the tensile strength is 5.75MPa, the tear strength is 16.1N/mm, and the elongation is 320%. With the addition of polymer polyester polyol, the hardness and strength of the elastomer increase. , but the elongation rate drops significantly, and it also brings about the increase of the viscosity of the polyol component, the mismatch of the viscosity of ...

Method used

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  • Microcellular polyurethane elastomer and preparation method thereof
  • Microcellular polyurethane elastomer and preparation method thereof
  • Microcellular polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The used raw material of polyester polyol A is terephthalic acid, adipic acid, diethylene glycol and ethylene glycol, and the mol ratio of terephthalic acid and adipic acid is 1.2 / 1, and the ratio of diethylene glycol and ethylene glycol The molar ratio is 1.2 / 1, and the number average molecular weight of the obtained polyester is 1000. Polyester polyol B is a CMA-254 product of Yantai Huada Chemical Industry Company.

[0036] Weigh component A raw materials according to mass ratio: 100 parts of polyester polyol A, 9 parts of ethylene glycol, 0.5 parts of DC3043, 0.6 parts of water, 2.0 parts of Dabco33-LV / DabcoT-12 (mass ratio 8 / 1), Place in a reaction kettle, mix for 2 hours at 45°C, and store in a sealed container.

[0037] Weigh the raw materials of component B according to the mass ratio: 100 parts of polyester polyol B, 150 parts of MDI, react at 85°C for 1 hour, vacuumize to remove air bubbles, cool down to 50°C, take a sample and analyze that the NCO content is...

Embodiment 2

[0040] The used raw material of polyester polyol A is terephthalic acid, adipic acid, diethylene glycol and ethylene glycol, and the mol ratio of terephthalic acid and adipic acid is 0.5 / 1, and the ratio of diethylene glycol and ethylene glycol The molar ratio is 0.8 / 1, and the number average molecular weight of the polyester is 1500. Polyester polyol B is a CMA-254 product of Yantai Huada Chemical Industry Company.

[0041]Weigh component A raw materials according to mass ratio: 100 parts of polyester polyol A, 9 parts of 1,4-butanediol, 0.5 parts of DC3042, 0.6 parts of water, Dabco33-LV / DabcoT-12 (mass ratio 8 / 1) 1.2 parts, mixed at 70°C for 1 hour, sealed and stored.

[0042] Weigh the raw materials of component B according to the mass ratio: 100 parts of polyester polyol B, 120 parts of MDI, react at 60°C for 2 hours, vacuum defoam, cool down to below 50°C, take samples and analyze that the NCO content is 17%, and discharge , sealed and preserved.

[0043] Control the ...

Embodiment 3

[0045] The used raw material of polyester polyol A is terephthalic acid, adipic acid, diethylene glycol and ethylene glycol, and the molar ratio of terephthalic acid and adipic acid is 1 / 1, and the ratio of diethylene glycol and ethylene glycol The molar ratio is 0.8 / 1, and the number average molecular weight of the polyester is 2000; the polyester polyol B is a POL-2016 product of Qingdao Xinyutian Chemical Company.

[0046] Weigh component A raw materials according to mass ratio: 100 parts of polyester polyol A, 9 parts of ethylene glycol, 0.5 parts of DC193, 0.3 parts of water, 1.5 parts of Dabco33-LV / DabcoT-9 (mass ratio 8 / 1), Mix at 60°C for 1 hour, and store in a sealed container.

[0047] Weigh the raw materials of component B according to the mass ratio: 100 parts of polyester polyol B, 120 parts of MDI, 30 parts of liquefied MDI, react at 70°C for 1 hour, vacuum defoam, cool down to below 50°C, and take samples to analyze the NCO content. 20%, discharged, sealed and ...

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Abstract

The invention discloses a microcellular polyurethane elastomer and a preparation method thereof. The elastomer contains two components, i.e., a polyol component and a prepolymer component, wherein the polyol component comprises polyester polyol, a chain extender, a foam stabilizer, water, a catalyst and the like; and the prepolymer component comprises polyester polyol, isocyanate and the like. The polyester polyol in the polyol component is prepared from a mixture of aromatic dibasic acid and aliphatic diacid and a mixture of diethylene glycol and other dihydric alcohols by means of polycondensation reaction. Compared with common microcellular polyester-type elastomers, the prepared elastomer has higher hardness and mechanical properties as well as better abrasive and bending resistances, besides, the flowability of materials is good. The material can be used in the fields like soles, solid tires, buffer blocks and the like. The preparation method is simple and feasible.

Description

technical field [0001] The invention relates to a polyurethane microporous elastomer and a preparation method thereof. Background technique [0002] Polyurethane microcellular elastomer is a material whose performance is between that of elastomer and foam material. Its density is between that of foam and solid core material. The pore size of the cells is 0.1-10 μm. It has the advantages of light weight, good impact resistance, energy absorption, good cushioning performance, high strength of elastomer, and good wear resistance. Therefore, in terms of main physical and mechanical properties, polyurethane microcellular elastomers surpass all other microcellular elastomers with the same density, and are widely used in shock-absorbing materials, sealing, shoemaking, solid tires, filtration, etc. Polyurethane microcellular elastomers can be divided into two types: polyether-type and polyester-type. Polyester-type polyurethane microcellular elastomers have good mechanical properti...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G63/672C08G101/00
Inventor 潘洪波石雅琳韦永继姚庆伦
Owner LIMING RES INST OF CHEM IND
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