Polyurethane corrosion-resistant material and preparation method thereof

A corrosion-resistant material, polyurethane technology, used in polyurea/polyurethane adhesives, non-polymer adhesive additives, adhesive types, etc., can solve problems such as leakage, glass brick and adhesive quality can not meet technical requirements, etc. , to achieve the effect of improving anti-corrosion durability, good mechanical properties and acid corrosion resistance, and simple preparation method

Active Publication Date: 2020-12-25
SHENZHEN ANPIN SILICONE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, domestic power plant chimneys mostly use waste glass foam glass bricks for wet chimney anticorrosion, but about 80% will leak within one year, the main reason is that the quality of glass bricks and adhesives cannot meet the technical requirements

Method used

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  • Polyurethane corrosion-resistant material and preparation method thereof
  • Polyurethane corrosion-resistant material and preparation method thereof
  • Polyurethane corrosion-resistant material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The preparation method of active prepolymer is as follows:

[0045] 50kg of polyisobutylene succinic anhydride (number average molecular weight is 1000, 100 ℃ kinematic viscosity is 800mm 2 / s, the model is 2007A, the acid value is 110mgKOH / g, the manufacturer is Jinzhou Shengda Chemical) heating up to 100 ℃, and polycaprolactone diol (L210AL, Nippon Chemical Industry Co., Ltd. Daicel, number average The molecular weight is 1000, the hydroxyl value is 56mgKOH / g), after mixing, the vacuum is pumped to -0.08MPa and the temperature is raised to 200°C for reaction. The acid value of the reaction mixture reaches 5.8mgKOH / g. Stop the reaction and cool down to obtain an active prepolymer. Test the activity The number average molecular weight of the prepolymer is 3000, and the kinematic viscosity at 100°C is 1500mm 2 / s, the hydroxyl value is 37mgKOH / g.

Embodiment 2

[0047] The polyisobutylene succinic anhydride of 60Kg (number average molecular weight is 1000, and 100 ℃ kinematic viscosity is 800mm 2 / s, model is 2007A, manufacturer is Jinzhou Shengda Chemical, acid value 110mgKOH / g) heating up to 100 ℃, and polycaprolactone diol (CAPA2200, Swedish Perstorp group company, number average molecular weight 2000, with 100Kg) Hydroxyl value 56mgKOH / g) after mixing, vacuumize to -0.08MPa and heat up to 230°C for reaction. The acid value of the reaction mixture reaches 6.8mgKOH / g. Stop the reaction and lower the temperature to obtain an active prepolymer. Test the obtained active prepolymer The number average molecular weight is 3800, and the kinematic viscosity at 100°C is 1500mm 2 / s, the hydroxyl value is 30mgKOH / g.

Embodiment 3

[0049] The polyisobutylene succinic anhydride of 100Kg (number average molecular weight is 1000, and 100 ℃ kinematic viscosity is 650mm 2 / s, the model is PIBSA-1000, the acid value is 100mgKOH / g, the manufacturer is Xinxiang City Ruifeng New Material Co., Ltd.) heating up to 100 ℃, and 100kg polycaprolactone triol (L330AL, Nippon Chemical Industry Co., Ltd. Daicel Corporation, number average molecular weight 3000, hydroxyl value 56mgKOH / g), 50kg polybutylene adipate (XCP-1044, Asahikawa Chemical, number average molecular weight 1000, hydroxyl value 110mgKOH / g) mixed and then evacuated to - Under the condition of 0.08MPa, the temperature was raised to 180°C for reaction, and the acid value of the test reaction mixture reached 7.5mgKOH / g, the reaction was stopped, and the temperature was lowered to obtain an active prepolymer. The number average molecular weight of the active prepolymer obtained by the test was 5000, and the kinematic viscosity at 100°C was 4500mm 2 / s, the hy...

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Abstract

The invention belongs to the technical field of adhesive materials, and discloses a polyurethane corrosion-resistant material and a preparation method thereof. The polyurethane corrosion-resistant material is composed of a corrosion-resistant composition and a curing agent. The corrosion-resistant composition comprises an active prepolymer. The active prepolymer is a modified polymer with an active terminal hydroxyl group, which is obtained by carrying out esterification reaction on raw materials including an ethylenically unsaturated anhydride modified polymer and polyester polyol. The polyurethane corrosion-resistant material disclosed by the invention has good mechanical properties and acid corrosion resistance after being cured, and the preparation method of the product is simple.

Description

technical field [0001] The invention relates to a polyurethane corrosion-resistant material used for anti-corrosion, especially chimney anti-corrosion and a preparation method thereof. Background technique [0002] At present, domestic power plant chimneys mostly use waste glass foam glass bricks for wet chimney anticorrosion, but about 80% will leak within one year, mainly because the quality of glass bricks and adhesives cannot meet the technical requirements. The anti-corrosion conditions of wet chimneys are harsh, including: the concentration of acid solution is high, and the pH value of the actual extracted acid solution sample is close to 1; in places where fluid is easy to accumulate, as the water in the acid solution volatilizes, the concentration increases; the acid solution The composition is complex, containing sulfuric acid, and also contains trace amounts of nitric acid, hydrochloric acid and hydrofluoric acid, which are very corrosive to materials. Foam glass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/04C09J11/06C09J11/08
CPCC09J175/06C09J11/04C09J11/06C09J11/08C08K2003/3045C08L2205/03C08L2205/025C08L23/20C08L23/16C08K5/1345C08K3/36C08K3/30
Inventor 王超马玉珍刘奇明余栋才游正林苏剑
Owner SHENZHEN ANPIN SILICONE MATERIAL
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