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High and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive and preparation method thereof

A polyurethane single, high and low temperature resistant technology, used in polyurea/polyurethane adhesives, adhesives, adhesive types, etc. Good shear strength

Inactive Publication Date: 2009-09-16
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the existing technical problems of water and moisture resistance of existing adhesives under ultra-low temperature and high-low conversion temperature difference, and the problems of repairing and convenient construction under high temperature, the purpose of the present invention is to provide an adhesive with high adhesive force under high temperature and ultra-low temperature. , no cracking, low thermal conductivity, water resistance, moisture resistance, high temperature and ultra-low temperature resistant adhesives that can be used for a long time

Method used

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  • High and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive and preparation method thereof
  • High and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive and preparation method thereof
  • High and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The adhesive is prepared according to the following composition ratio (mass percentage content):

[0023] Silicone polyurethane modified prepolymer 40%

[0024] Solvent 10%

[0025] Chain extender 10%

[0026] Filling 40%

[0027] The preparation method of the adhesive is:

[0028] Mix the silicone polyurethane modified prepolymer with the chain extender, and after premixing for one hour, pour the remaining combinations into the already mixed reaction kettle, stir evenly, and pack. When the material is bonded, the moisture will solidify.

[0029] Example effect: low temperature resistance -200 degrees, high temperature 240 degrees, bonding shear force 21MPa., hydrolysis resistance resistance value 2.02×10 6 Ω.

Embodiment 2

[0031] The adhesive is prepared according to the following composition ratio (mass percentage content):

[0032] Silicone polyurethane modified prepolymer 45%

[0033] Solvent 10%

[0034] Chain extender 15%

[0035] Filling 30%

[0036] The preparation method of the adhesive is the same as in Example 1.

[0037] Example effect: low temperature resistance -200 degrees, high temperature 225 degrees, bonding shear force 20MPa, hydrolysis resistance resistance value 4.08×10 6 Ω.

Embodiment 3

[0039] The adhesive is prepared according to the following composition ratio (mass percentage content):

[0040] Silicone polyurethane modified prepolymer 47%

[0041] Solvent 15%

[0042] Chain extender 8%

[0043] Filling 30%

[0044] The preparation method of the adhesive is the same as in Example 1.

[0045] Example effect: low temperature resistance -200 degrees, high temperature 226 degrees, bonding shear force 24MPa, hydrolysis resistance resistance value 3.05×10 6 Ω.

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Abstract

The invention discloses a high and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive and a preparation method thereof. The adhesive consists of the following components by mass percentage: 40 to 65 percent of organosilicone polyurethane modified prepolymer, 10 to 20 percent of solvent, 1 to 15 percent of chain extender, and 20 to 40 percent of filler. The liquid components are uniformly mixed firstly, and then added with the solid components for uniform stirring; and the mixture is ground on a grinding machine and then packaged. The high and low temperature resistant and hydrolysis resistant polyurethane monocomponent adhesive has high-temperature resistance, ultralow temperature resistance and water resistance, can be used in the process of changing the temperature between 200 DEG C and 240 DEG C below zero in the 400 DEG C temperature difference and at 200 DEG C below zero for a long time, and is mainly applied to bonding materials of parts of LNG ships with large temperature difference change.

Description

Technical field [0001] The invention belongs to the technical field of adhesives, and relates to a silicone polyurethane high temperature and ultra-low temperature hydrolysis resistant one-component adhesive and a preparation method thereof, and specifically relates to a silicone modified polyurethane high temperature and ultra low temperature adhesive, which is mainly applied to a certain LNG ship Some high and low temperature conversion parts with large temperature differences. Background technique: [0002] With the rapid increase in the use of liquefied gas (such as: liquefied natural gas LNG, liquefied petroleum gas LPG, liquefied ethylene, liquid oxygen, liquid nitrogen, etc.), the bonding between cryogenic insulation materials supporting liquefied gas at ultra-low temperature , Has become a technical problem that needs to be solved urgently, which has attracted great attention in the field of adhesive technology. [0003] During the construction of the LNG ship, there is a...

Claims

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Application Information

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IPC IPC(8): C09J175/04C09J9/00C08G18/32
Inventor 高延敏周宏建朱俊杰
Owner JIANGSU UNIV OF SCI & TECH
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