Room-temperature curing polyurethane material as well as preparation method and application thereof

A polyurethane material, room temperature curing technology, applied in the field of polymer materials, can solve the problems of no green environmental protection, achieve flexible and adjustable curing time, good fluidity, and good adhesion

Inactive Publication Date: 2018-07-13
CHANGCHUN A&Z SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, although there are many types of polyurethane materials in the prior art, there is no polyurethane material that is environmentally friendly, can be cured at room temperature, has good

Method used

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  • Room-temperature curing polyurethane material as well as preparation method and application thereof
  • Room-temperature curing polyurethane material as well as preparation method and application thereof

Examples

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preparation example Construction

[0027] The preparation method of room temperature curing polyurethane material, the steps are as follows:

[0028] Step 1. Mix the pre-dehydrated polyol and isocyanate in a mass ratio of 1:(0.5-4), stir and react at 60-80°C for 1-3h, and the stirring speed is 200-1200rpm / min to obtain NCO-terminated polyurethane prepolymerization Body, that is, component A, titrate its NCO value after the reaction is completed, preferably the NCO value range is 12-23%;

[0029] Step 2, blending and dehydrating the polyol and the small molecule chain extender in a mass ratio of 1:(0.05-0.2), then adding a catalyst, stirring evenly to obtain component B;

[0030] Step 3: Weighing component A and component B according to the chain extension coefficient of 0.95, sealing and subpackaging to obtain a room temperature curing polyurethane material;

[0031] It is also possible to further mix the A component and the B component weighed according to the chain extension coefficient of 0.95, stir evenly,...

Embodiment 1

[0039] Step 1. Add 200g of PTMEG-1000 into a 1L three-necked flask, place the flask in an oil bath at 120°C, and prepare a thermometer, a stirring paddle, and a double-row tube for each of the three-necked flasks. After ensuring airtightness, vacuumize under stirring at 200rpm / min. After 2 hours, ensure that the pressure in the bottle is stable below 400pa, then cool down to 70°C, add 400g of MDI, stir at 400rpm / min for 2 hours, and after cooling, component A is obtained. , the NCO content value of sampling and titration is 19.60%, poured out and sealed for preservation.

[0040]Step 2: Add 500g of PPG-1000 and 28.0g of BDO into a 1L single-necked flask, place the flask in an oil bath at 120°C, and vacuumize under stirring at 400rpm / min. After 2 hours, ensure that the pressure in the bottle is stable at Below 400pa, after cooling to room temperature, add 0.35g N,N dimethylbenzylamine, stir for 2min to obtain component B, pour it out and seal it for storage.

[0041] Step 3. S...

Embodiment 2

[0044] Step 1. Add 240g of PTMEG-1000 into a 1L three-neck flask, place the flask in an oil bath at 120°C, and equip the three ports with a thermometer, a stirring paddle, and a double-row tube respectively. After ensuring airtightness, vacuumize under stirring at 200rpm / min. After 2 hours, ensure that the pressure in the bottle is stable below 400pa, then cool down to 70°C, add 321g of MDI, stir at 400rpm / min for 2 hours, and after cooling, component A is obtained. , the NCO content value of sampling analysis was 15.63%, poured out and sealed for preservation.

[0045] Step 2. Add 400g of PTMEG-650 and 71.5g of BDO into a 1L single-necked flask, place the flask in an oil bath at 120°C, and vacuumize under stirring at 400rpm / min. After 2 hours, ensure that the pressure in the bottle is stable at Below 400pa, after cooling to room temperature, add 0.37g N,N dimethylbenzylamine, stir for 2min to obtain component B, pour it out and seal it for storage.

[0046] Step 3. Shake com...

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Abstract

The invention relates to a room-temperature curing polyurethane material as well as a preparation method and application thereof, belongs to the technical field of high polymer materials and solves the problem of how to provide a polyurethane material which is green and environmentally friendly, capable of being cured at a room temperature, good in fluidity, long in service life, high in strength,resistant to humidity and heat, simple in operation process, adjustable and controllable in curing time and strong in bonding performance with metals. The preparation method provided by the inventioncomprises the following steps: firstly mixing pre-dehydrated polyol with isocyanate and reacting to obtain a NCO-terminated polyurethane pre-polymer, namely a component A; then blending polyol and asmall-molecule chain extender, dehydrating, adding a catalyst and uniformly stirring to obtain a component B; finally weighing the component A and the component B according to a chain expansion coefficient of 0.95, sealing and sub-packaging to obtain the polyurethane material. The material is green and environmentally friendly, long in storage life, easy to uniformly mix, good in fluidity, good bonding performance with the metals, capable of being cured at a room temperature, flexible, adjustable and controllable in curing time, high in strength after curing, good in humidity and heat resistance and suitable for metal pipe pouring molding.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a room temperature curing polyurethane material and its preparation method and application. Background technique [0002] With the popularization of energy saving and environmental protection awareness, more and more polyurethane materials are developing in the direction of green energy saving in terms of raw material selection and production process. Compared with high energy-consuming thermal curing methods, room temperature curing has gradually become the The preferred process of the material. Generally speaking, the strength of polyurethane materials cured at room temperature is lower than that of materials cured at high temperature. Therefore, in order to increase the strength of materials, various reinforcing agents are often added. Carbon black, silicon powder, and sulfates are added to enhance the strength of the material, but the filler takes a lon...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32C08G18/69
CPCC08G18/4808C08G18/4825C08G18/4854C08G18/6674C08G18/698C08G18/7614C08G18/7671
Inventor 王晓建王杰郇彦孙洪国
Owner CHANGCHUN A&Z SCI CO LTD
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