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Polyurethane resin combination and preparation method and using method thereof

A technology of polyurethane resin and composition, which is applied in the direction of track, ballast layer, building, etc. It can solve the problems of affecting the compactness and uniformity of filling resin, the amount is greatly affected by the temperature, and the water vapor is difficult to exclude, so as to achieve good UV resistance Irradiation, the effect of simple preparation method and easy industrialization

Active Publication Date: 2009-08-05
ZHEJIANG HANGMO SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What is more difficult to solve is the process performance of the operation. Since the polyurethane resin is sensitive to water vapor, it will react with water to produce CO 2 , a large number of bubbles are prone to appear, which affects the compactness and uniformity of the filled resin
Under field construction conditions, the masked isocyanate that is heated and cured cannot be used but can only be cured at room temperature. It is difficult to dry cement parts and water vapor is difficult to get rid of, which brings great difficulties to the construction.
In order to reduce the generation of air bubbles, it is often achieved by adding accelerators to accelerate gelation and curing. However, it is difficult to grasp the amount of accelerators added, and its amount is greatly affected by the temperature. If the amount added is too small, the curing time will be long and hair loss will occur. If the bubble is serious, if you add too much, it will gel before you use it
Moreover, the molecular structure of ordinary polyurethane resin contains a large number of benzene ring double bonds, which can cause chain scission under long-term ultraviolet radiation, resulting in resin pulverization and cracking, which will bring hidden dangers to the long-term stable operation of the railway and increase maintenance costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Put 300g of polyoxypropylene triol (hydroxyl value 54~58mgKOH / g), 27.6g of 1,4-butanediol, 0.3g of stannous octoate into a 1 liter three-necked flask, stir and raise the temperature to 130~150℃, -0.1MPa dehydration 2 hours, cool down to 100~120℃, add 1g carbon black, 5g titanium dioxide, 100g 400 mesh heavy calcium carbonate after drying, 200g active silicon powder HGH600, defoamer A-530 (BK Chemical) 0.1 g, Coupling agent KH-560 1g, at 120~130℃, -0.1MPa, 100~200 rpm speed, stirring and mixing for 2 hours, cooling 50~60℃, discharge package as type A, test viscosity 2500mpa. s25℃, hydroxyl value 79mgKOH / g.

[0036] In a 1 liter three-necked flask, 300g of polyoxypropylene glycol (hydroxyl value 105~117mgKOH / g), 100g of pentaerythritol polyoxypropylene ether (hydroxyl value 32.5~35.5mgKOH / g), 0.5g of dibutyltin laurate were added, and the temperature was increased by stirring for 60 ~70℃, add 160g hexamethylene diisocyanate (HDI) dropwise, NCO / OH(mol)=3.2:1, maintain the reac...

Embodiment 2

[0042] Put 300g of polyoxypropylene glycol (hydroxyl value 54-58gmgKOH / g), 13.8g of 1,4-butanediol, 0.3g of stannous octoate into a 1 liter three-necked flask, stir and raise the temperature to 130~150℃, -0.1MPa dehydration 2 After hours, cool to 100~120℃, add 10g of titanium dioxide, 100g of 400 mesh heavy calcium carbonate after drying, 200g of active silicon powder HGH600, 0.1g of defoamer A-530 (by BYK, Germany), coupling agent KH-560 1g, stir and mix for 4 hours at 120~130℃, -0.1MPa, 100~120 rpm speed, cool down 50~60℃, discharge package as Class A, test viscosity 2600mpa.s25℃, hydroxyl equivalent 1050g / mol (hydroxyl value 53mgKOH / g).

[0043] In a 1 liter three-necked flask, 200g of polyoxypropylene glycol (hydroxyl value 105~117mgKOH / g), 150g of pentaerythritol propylene oxide ether (hydroxyl value 32.5~35.5mgKOH / g), 0.5g of dibutyltin laurate were added, and the mixture was stirred and heated for 60~ 70°C, add 160g isophordione diisocyanate (IPDI) dropwise, NCO / OH(mol)=3.0...

Embodiment 3

[0049] Put 200g of polyoxypropylene triol (hydroxyl value 54~58mgKOH / g), 100g of polyoxypropylene glycol (hydroxyl value 105~117mgKOH / g), 13.8g of 1,4-butanediol, 13.8g of 1,4-butanediol and subcaprylic acid into a 1 liter three-necked bottle. Tin 0.3g, stirring and heating to 130~150℃, -0.1MPa dehydration for 2 hours, cooling to 100~120℃, adding 5g carbon black, 100g 400 mesh heavy calcium carbonate after drying treatment, active silicon powder HGH600200g, defoaming A-530 (Germany BYK) 0.1g, coupling agent n-butyl titanate 10g, ultraviolet absorber UV-P 1.5g, antioxidant 10102g, at 120~130℃, -0.10~0MPa, 180 Stir and mix for 2 hours at a rotation speed of ~200 rpm, and cool to 50 ~ 60°C. Discharge and package as Class A. Test viscosity is 2600mpa.s25°C, hydroxyl value is 60mgKOH / g, and hydroxyl equivalent is 930g / mol.

[0050] In a 1-liter three-necked flask, add 200g of polyoxypropylene glycol (hydroxyl value 105~117mgKOH / g), 150g of polyoxypropylene triol (hydroxyl value 54~58mg...

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Abstract

The invention provides a polyurethane resin composition, its preparation method and its use as a filling material for the convex stopper of railway slab ballastless track, the composition is mainly used as the convex stopper of railway slab ballastless track Filler. The polyurethane resin composition is mainly composed of polyether or polyester polyol, isocyanate or its prepolymer, pigment, filler and other auxiliary agents. The prepared polyurethane resin has good construction technology, and the cured resin has good adhesion to cement, and has ultraviolet radiation resistance, damp heat aging resistance, fatigue resistance and suitable elasticity and comprehensive mechanical properties.

Description

Technical field [0001] The invention relates to a chemical material, its preparation method and its use method, in particular to a polyurethane resin composition, its preparation method and its use method. Background technique [0002] The development of railways, especially high-speed railways, is an effective way to solve the contradiction between the rapid development of the national economy on logistics, the rapid increase in the flow of people and energy shortages, and to reduce transportation costs. However, as the train speed continues to increase, there is ballast powder from ballast tracks. The accumulative deformation rate of the ballast bed will accelerate, and the track structure must be strengthened and frequent maintenance work to meet the high-speed railway's requirements for high smoothness and high stability. Compared with the ballasted track, the ballastless track has the outstanding advantages of track stability, rigidity uniformity and durability, high smoothn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08G18/48C08G18/42C08G18/74C08K5/17E01B1/00
Inventor 梁平辉
Owner ZHEJIANG HANGMO SYNTHETIC MATERIAL
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