Polyurethane resin combination and preparation method and using method thereof

A technology of polyurethane resin and composition, applied in the direction of track, ballast layer, building, etc., can solve the problems of affecting the compactness and uniformity of filling resin, the dosage is greatly affected by the temperature, and the water vapor is difficult to remove, etc., and achieves good UV resistance. The effect of irradiation, simple preparation method and easy industrialization

Active Publication Date: 2007-09-19
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] Throw 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 heat up to 130-150°C, and dehydrate at -0.1MPa For 2 hours, cool down to 100-120°C, add 1g of carbon black, 5g of titanium dioxide, 100g of dried 400-mesh heavy calcium carbonate, 200g of active silica powder HGH600, and 0.1 g, coupling agent KH-560 1g, at 120-130°C, -0.1MPa, 100-200 rpm, stir and mix for 2 hours, cool down to 50-60°C and pack as Class A, test viscosity 2500mpa. s25℃, hydroxyl value 79mgKOH / g.

[0036] Add 300 g of polyoxypropylene diol (hydroxyl value 105-117 mgKOH / g), 100 g of pentaerythritol polyoxypropylene ether (hydroxyl value 32.5-35.5 mgKOH / g) and 0.5 g of dibutyltin laurate into a 1-liter three-necked flask, and stir to heat up to 60 At ~70°C, add 160g of hexamethylene diisocyanate (HDI) dropwise, NCO / OH (mol) = 3.2:1, keep the reaction for 5 hours, cool down and discharge the materia...

Embodiment 2

[0041] Throw 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 heat up to 130-150°C, and dehydrate at -0.1MPa for 2 hour, lower the temperature to 100-120°C, add 10g of titanium dioxide, 100g of dried 400-mesh heavy calcium carbonate, 200g of active silica powder HGH600, 0.1g of defoamer A-530 (Germany BYK), coupling agent KH-560 1g, at 120~130℃, -0.1MPa, 100~120 rpm, stir and mix for 4 hours, cool down 50~60℃, discharge and pack as Class A, test viscosity 2600mpa.s25℃, hydroxyl equivalent 1050g / mol (hydroxyl value 53mgKOH / g).

[0042] Add 200 g of polyoxypropylene diol (hydroxyl value 105-117 mgKOH / g), 150 g of pentaerythritol oxypropylene ether (hydroxyl value 32.5-35.5 mgKOH / g) and 0.5 g of dibutyltin laurate into a 1-liter three-neck flask, and stir to heat up 60- 70°C, add 160g of isophordione diisocyanate (IPDI) dropwise, NCO / OH (mol) = 3.0:1, maintain the reactio...

Embodiment 3

[0047] Throw 200 g of polyoxypropylene triol (hydroxyl value 54-58 mgKOH / g), 100 g of polyoxypropylene diol (hydroxyl value 105-117 mgKOH / g), 13.8 g of 1,4-butanediol, and octanoic acid in a 1-liter three-necked bottle. Tin 0.3g, stir and heat up to 130-150°C, dehydrate at -0.1MPa for 2 hours, cool down to 100-120°C, add 5g of carbon black, 100g of dried 400 mesh heavy calcium carbonate, 200g of active silica powder HGH600, 0.1g foaming agent A-530 (Germany BYK Chemicals), 10g coupling agent n-butyl titanate, 1.5g ultraviolet absorber UV-P, 2g antioxidant 1010, at 120~130℃, -0.10~0MPa, Stir and mix for 2 hours at a speed of 180-200 rpm, cool to 50-60°C, and pack as Class A. The tested viscosity is 2600mpa.s at 25°C, the hydroxyl value is 60mgKOH / g, and the hydroxyl equivalent is 930g / mol.

[0048] Add 200 g of polyoxypropylene diol (hydroxyl value 105-117 mgKOH / g), 150 g of polyoxypropylene triol (hydroxyl value 54-58 mgKOH / g) and 0.5 g of dibutyltin laurate into a 1-liter thr...

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Abstract

The invention provides a polyurethane resin composition, its preparation method, and using method of the same used as filling material of railway plate type dreg-free track convex block. The polyurethane resin composition is mainly used as filling material of railway plate type dreg-free track convex block, and mainly includes: polyether or polyester polyol, isocyanate or prepolymer of the same, pigment, filling and other auxiliary agent. Advantages of the prepared polyurethane resin are: construction manufacturability is better, bonding to cement of cured resin is good; the polyurethane resin is resistant of ultraviolet ray irradiation, moisture, heat, ageing and fatigue, and owns appropriate elasticity and integrated mechanical capability.

Description

technical field [0001] The invention relates to a chemical material, its preparation method and its use method, especially 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 and the sharp increase in logistics, people flow and energy shortage, and to reduce transportation costs. The rate of accumulative deformation of the ballast and the accumulative deformation of the track bed will be accelerated accordingly. It is necessary to strengthen the track structure and frequent maintenance and repair work to meet the requirements of high-speed railways for high smoothness and high stability of the track. Compared with ballasted track, ballastless track has the outstanding advantages of track stability, uniformity of stiffness and durability, high ride comfort, and s...

Claims

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Application Information

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