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Method for preparing monocomponent polyurethane adhesive with low viscosity without solvent

A polyurethane adhesive and one-component technology, which is applied in the field of preparation of one-component polyurethane adhesive, can solve the problems that polyethylene materials are prone to corrosion, etc., and achieve the effect of less glue making process and simple preparation process

Inactive Publication Date: 2010-03-24
SHANGHAI HAOHAI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This two-component adhesive has great limitations in the production of metal-faced polystyrene sandwich panels with concavo-convex ribs. However, due to the high viscosity of the one-component adhesive, it is usually reduced by adding a solvent. , but the one-component glue with solvent is easy to corrode the surface of polyethylene material
At present, there is still no satisfactory polyurethane one-component adhesive to provide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add polyether GE310 100Kg, 3050 150Kg, DPG 50kg into a one-ton reactor, heat to 110-120°C, dehydrate under -0.098~-0.1MPa vacuum, when the moisture drops to 0.02~0.05%, lower the material temperature To 50~60℃, add TDI 60kg, there will be a strong exothermic reaction at the beginning of the reaction, control the reaction temperature at 80~90℃, the reaction time is 60min, then add MDI 300kg, keep 80~90℃ for another 90min, then cool down to 35~40℃, a little catalyst. After stirring for half an hour, discharge.

Embodiment 2

[0014] Add polyether 3050 100Kg, 210 150Kg, DPG 50kg into a one-ton reactor, heat to 110-120°C, dehydrate under -0.098~-0.1MPa vacuum, when the moisture drops to 0.02~0.05%, lower the material temperature Add 65kg of TDI to 50~60℃, there will be a strong exothermic reaction at the beginning of the reaction, control the reaction temperature at 80~90℃, the reaction time is 60min, then add MDI 315kg, keep 80~90℃ for another 90min, and then cool down to 35~40℃, a little catalyst. After stirring for half an hour, discharge.

Embodiment 3

[0016] Add polyether GE310 100Kg, 210 150Kg, DPG 50kg into a one-ton reactor, heat to 110-120°C, dehydrate under -0.098~-0.1MPa vacuum, when the moisture drops to 0.02~0.05%, lower the material temperature To 50-60℃, add 50kg of TDI, there will be strong exothermic reaction at the beginning of the reaction, control the reaction temperature at 80-90℃, the reaction time is 60min, then add MDI 320kg, keep 80-90℃ for another 90min, then cool down to 35~40℃, a little catalyst. After stirring for half an hour, discharge.

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Abstract

The invention discloses a method for preparing monocomponent polyurethane adhesive with low viscosity without solvent. The method uses GE310, 210, 3050 and DPG as raw materials, combines isocyanate TDI and MDI to obtain the monocomponent polyurethane adhesive with low viscosity without solvent by adopting different isocyanate stop ends in different stages.

Description

technical field [0001] The invention relates to a preparation method of a low-viscosity solvent-free one-component polyurethane adhesive. Background technique [0002] Metal-faced polystyrene sandwich panels have developed rapidly in China in recent years due to relatively small investment in production equipment. According to incomplete statistics, there are about 120 manufacturers nationwide, with an annual production capacity of about 30-40 million square meters. Polyurethane adhesive, as a necessary raw material for the production of metal-faced polystyrene sandwich panels, has also developed rapidly, with a domestic consumption of about 10,000 tons. The vast majority of polyurethane adhesives currently on the market are two-component adhesives. This two-component adhesive has great limitations in the production of metal-faced polystyrene sandwich panels with concave-convex ribs. However, due to the high viscosity of the one-component adhesive, it is usually reduced by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08
Inventor 王学军徐强季新林刘远中
Owner SHANGHAI HAOHAI CHEM