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Multi-mechanism cured anti-condensation polyurethane sealing part and preparation method thereof

A polyurethane and anti-condensation technology, applied in the field of polymer materials, can solve the problems of poor self-leveling properties, poor moisture absorption resistance, and complicated processes, and achieve the effects of good heat insulation, improved hydrolysis resistance, and improved self-leveling properties.

Inactive Publication Date: 2018-04-13
安徽火峰电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects of poor self-leveling properties, complex process and poor moisture absorption resistance in the prior art, a multi-mechanism curing anti-condensation polyurethane seal and its preparation method are provided. The present invention provides a polyurethane sealant mixed with The polyurethane prepolymer formed has good self-leveling properties and room temperature curing properties

Method used

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preparation example Construction

[0033] The present invention also provides a preparation method of the above-mentioned multi-mechanism curing anti-condensation polyurethane seal, comprising the following steps:

[0034] Mix polyol, vinyl monomer, free radical initiator and foaming agent as component A, use isocyanate material as component B, slowly add component B to component A, and mix evenly to form a polyurethane seal Prepolymer, the prepolymer is cast into a finished product and cured at room temperature.

[0035] Preferably, the polyol content accounts for 50-80% by weight of component A, the vinyl monomer content accounts for 5-30% by weight of component A, and the foaming agent accounts for 50-30% by weight of component A The ratio is 0.1%-10%, and the free radical initiator accounts for 10ppm-1% by weight of component A.

[0036] Preferably, the weight ratio of component A to component B is 1:0.1-5.

[0037] Preferably, the weight ratio of component A to component B is converted to a molar ratio o...

Embodiment 1

[0040] The application discloses a multi-mechanism curing anti-condensation polyurethane seal, which is prepared from the following components: isocyanate material, polyol, vinyl monomer, free radical initiator and foaming agent.

[0041] The isocyanate material adopts toluene dicyanate.

[0042] The polyhydric alcohol adopts two-terminal hydroxyl polyether.

[0043] The vinyl monomer is methyl methacrylate.

[0044] The free radical initiator adopts benzoyl peroxide.

[0045] The foaming agent is polyurethane foaming agent.

[0046] The present invention also provides a preparation method of the above-mentioned multi-mechanism curing anti-condensation polyurethane seal, comprising the following steps:

[0047] Mix polyol, vinyl monomer, free radical initiator and foaming agent as component A, use isocyanate material as component B, slowly add component B to component A, and mix evenly to form a polyurethane seal Prepolymer, the prepolymer is cast into a finished product a...

Embodiment 2

[0053] The application discloses a multi-mechanism curing anti-condensation polyurethane seal, which is prepared from the following components: isocyanate material, polyol, vinyl monomer, free radical initiator and foaming agent.

[0054] The isocyanate material adopts hexamethylene diisocyanate.

[0055] The polyhydric alcohol adopts three-terminal hydroxyl polyether.

[0056] The vinyl monomer is methyl acrylate.

[0057] The free radical initiator adopts azobisisobutyronitrile.

[0058] The foaming agent is polyurethane foaming agent.

[0059] The present invention also provides a preparation method of the above-mentioned multi-mechanism curing anti-condensation polyurethane seal, comprising the following steps:

[0060] Mix polyol, vinyl monomer, free radical initiator and foaming agent as component A, use isocyanate material as component B, slowly add component B to component A, and mix evenly to form a polyurethane seal Prepolymer, the prepolymer is cast into a finishe...

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Abstract

The invention discloses a multi-mechanism cured anti-condensation polyurethane sealing part and a preparation method thereof. The multi-mechanism cured anti-condensation polyurethane sealing part is prepared from isocyanate, polyhydric alcohol, vinyl monomer, radical initiators and foaming agents. The preparation method of the multi-mechanism cured anti-condensation polyurethane sealing part includes the steps: mixing the polyhydric alcohol, the vinyl monomer, the radical initiators and the foaming agents into a component A; taking the isocyanate as a component B; slowly adding the component Binto the component A and uniformly mixing the component B and the component A to form polyurethane sealing part prepolymer; casting the prepolymer into a finished product and curing the finished product at room temperature to obtain the sealing part. The sealing part has excellent heat insulation, anti-condensation property, water resistance, aging resistance, dimensional stability, plugging property and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a multi-mechanism curing anti-condensation polyurethane seal and a preparation method thereof. Background technique [0002] Since the 1980s, the machinery, earthmoving equipment, and power application industries began to use polyurethane as a seal material. [0003] At present, many outdoor power equipment, especially power control and monitoring equipment, need to have the functions of heat preservation, water insulation, and equipment condensation prevention, so the sealant is produced accordingly. At present, two-component polyurethane sealant is mainly used for sealing. However, due to the complexity of the position where the power equipment needs to be sealed, it generally needs to be sealed on site. The two-component polyurethane sealant can be prepared according to the needs during use, but it must meet the requirements of self-leveling, fast curing, and good pe...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08F120/14C08G101/00
CPCC08G18/4825C08F120/14C08G18/4829C08G2101/00C08G2190/00
Inventor 丁希伟
Owner 安徽火峰电气有限公司
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