Micropore polyurethane elastomer material and preparation method and use thereof

A technology of polyurethane elastomer and microporous, which is applied in the direction of track, building, fixed rail, etc., and can solve the problems of not meeting practical requirements and poor shock absorption effect

Active Publication Date: 2012-07-04
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN1185501A discloses a common mineral clay reinforced polyurethane elastomer sleeper backing plate for railways, the backing plate prepared by it is a solid backing plate, and the shock absorption effect is relatively poor
[0005] CN101948616A discloses a microporous polyurethane elastomer damping element for high-speed railways and a preparation method thereof. The microporous elastomer prepared by monomer intercalation in-situ polymerization method has an oil-resistant volume expansion rate exceeding 10%, which cannot meet practical requirements

Method used

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  • Micropore polyurethane elastomer material and preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Component A: polyether polyol P1 (2-functionality polytetrahydrofuran ether polyol with a number average molecular weight of 2000) 55kg, polyether polyol P2 (3-functionality polyoxyethylene-oxypropylene copolyether with a number average molecular weight of 4800) Polyhydric alcohol, terminal and primary hydroxyl content greater than 70%) 25kg, ethylene glycol 6kg, foam stabilizer 0.3kg, water 0.4kg, tertiary amine catalyst 0.6kg, 3000 mesh hollow glass microspheres 10kg.

[0034] B component: the same as the comparative example.

Embodiment 2

[0036] Component A: polyether polyol P1 (2-functionality polytetrahydrofuran ether polyol with a number average molecular weight of 2000) 75kg, polyether polyol P2 (3-functionality polyoxyethylene-oxypropylene copolyether with a number average molecular weight of 4800) Polyhydric alcohol, terminal primary hydroxyl content is greater than 70%) 5kg, ethylene glycol 9kg, foam stabilizer 0.7kg, water 0.5kg, tertiary amine catalyst 1.0kg, 5000 mesh hollow glass microspheres 25kg.

[0037] Component B: 90kg of diphenylmethane diisocyanate, 10kg of dimethyl biphenyl diisocyanate, 77kg of polyether polyol P1 (2-functional polytetrahydrofuran ether polyol with a number average molecular weight of 2000), and an NCO group content of 23 %.

Embodiment 3

[0039] Component A: polyether polyol P1 (2-functionality polytetrahydrofuran ether polyol with a number average molecular weight of 3000) 75kg, polyether polyol P2 (3-functionality polyoxyethylene-oxypropylene copolyether with a number average molecular weight of 3000) Polyhydric alcohol, terminal primary hydroxyl content greater than 70%) 5kg, 1,4-butanediol 8kg, foam stabilizer 0.7kg, water 0.45kg, tertiary amine catalyst 0.8kg, 4000 order hollow glass microspheres 18kg.

[0040] Component B: 70kg of diphenylmethane diisocyanate, 30kg of dimethyl biphenyl diisocyanate, 164.3kg of polyether polyol P (2-functionality polytetrahydrofuran ether polyol with a number average molecular weight of 3000), the content of NCO groups is 20%.

[0041] The results of the examples show that after the hollow glass microsphere filler is added, the product density is significantly reduced, and the oil resistance is significantly improved. The performance of the product meets the requirements ...

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Abstract

The invention discloses a micropore polyurethane elastomer material and a preparation method and use thereof. The micropore polyurethane elastomer material is composed of two components. The A component includes polyether polyatomic alcohol P1, polyether polyatomic alcohol P2, chain extension agents, foam stabilizers, water, tertiary amine catalysts and hollow glass microspheres by weight percentage. The B component comprises methylene diphenyl diisocyanate (MDI), TODI, and polyether polyatomic alcohol P1. P1 is selected from polytetrahydrofuran polyatomic alcohol with number-average molar mass as 1000-6000 and functionality as 2-3. P2 is selected from propylene oxide polythene oxide copolyether polyatomic alcohol with number-average molar mass as 2000-6000, functionality as 3-4 and primary hydroxyl content larger than or equal to 70%. The isocyanate index number of the A component and the B component is 1.1. The A component and the B component are prepared respectively, quickly and evenly mixed according to proportion, poured in a mould and solidified to obtain the micropore polyurethane elastomer which can be used as an elastic bearing plate of high speed railways.

Description

technical field [0001] The invention relates to a microporous elastic backing plate for high-speed railways, in particular to a microporous polyurethane elastomer material. Background technique [0002] High-speed railways are developing rapidly in my country. When trains pass at high speed, high-frequency ground impact and high-decibel noise become one of the more serious problems. The current solution is to install a polyurethane-type elastic backing plate between the rail and the cement sleeper to play the role of buffering the high-speed impact vibration generated when the vehicle passes the rail, protecting the roadbed and the sleeper and reducing noise. [0003] Patent document CN1696166A discloses a method for manufacturing railway backing plates, which mainly adopts the method of inert gas foaming to prepare microcellular polyurethane elastomer, which requires high equipment and high product cost. [0004] CN1185501A discloses a common mineral clay reinforced polyur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08K7/28C08L75/08E01B9/68
Inventor 陈战有周文英王亚萌韦永继
Owner LIMING RES INST OF CHEM IND
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