A kind of preparation method of waterproof potting material

A technology of potting materials and polyurethane prepolymers, which is applied in the field of preparation of waterproof potting materials, can solve problems such as inadequacies, and achieve the effects of excellent water resistance, good water resistance performance, and a wide range of applications

Active Publication Date: 2016-05-18
李春梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some electronic equipment requires that the potting material can maintain a gentle viscoelastic state at a temperature of -40 to 80 degrees, and have a good noise reduction effect. At present, the material system in this area at home and abroad does not have such an effect.

Method used

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  • A kind of preparation method of waterproof potting material
  • A kind of preparation method of waterproof potting material
  • A kind of preparation method of waterproof potting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] The preparation method of a kind of waterproof potting material of the present embodiment is carried out according to the following steps:

[0058] 1. Add 100g of polyoxypropylene diol with a molecular weight of 4000 and 9.08g of MDI-100 into the reaction kettle, stir, heat to 80°C, and continue to stir for 2 hours. The percentage of isocyanate is 1.5%, and the polyurethane prepolymer is prepared. Into nitrogen airtight storage;

[0059] 2. Fully mix 100g polyurethane prepolymer with 3.03g molecular weight epoxy resin of 400 to prepare A component;

[0060] 3. Heat and melt 1.319g1,4-butanediol (curing agent) and 0.36g trimethylolpropane (curing agent) and heat and melt with 103g auxiliary agent 2, 0.06gN-dimethylbenylamine (reaction accelerator) ), 2.06g aminopropyltriethoxysilane (silane coupling agent) and 0.05g dibutyltin dilaurate (reaction accelerator) are fully mixed to prepare B component;

[0061] 4. Mix and cast the component A prepared in step 2 and the com...

Embodiment 2

[0065] The preparation method of a kind of waterproof potting material of the present embodiment is carried out according to the following steps:

[0066] 1. Add 100g of polyoxypropylene diol with a molecular weight of 2000 and 17.67g of T-100 into the reaction kettle, stir, heat to 84°C, continue to stir for 2h, and test that the percentage of isocyanate is 3.25%, and the polyurethane prepolymer is obtained. Into nitrogen airtight storage;

[0067] Two, 100g polyurethane prepolymer and 5.66g molecular weight are the epoxy resin of 400 fully mixed, make A component;

[0068] 3. Heat and melt 0.7g of 1,4-butanediol (curing agent) and 6.06g of 3,3'-dichloro-4,4'-diaminodiphenylmethane (curing agent) with 42.2g of auxiliary agent 3, 0.11g N-dimethyl benzyl amine (reaction accelerator) and 2.11g aminopropyltriethoxysilane (silane coupling agent) fully mix, make B component;

[0069] 4. Mix and cast the component A prepared in step 2 and the component B prepared in step 3, cure a...

Embodiment 3

[0073] The preparation method of a kind of waterproof potting material of the present embodiment is carried out according to the following steps:

[0074] 1. Add 100g of polytetrahydrofuran with a molecular weight of 2000 and 32.3g of MDI-100 into the reaction kettle, stir, heat to 85°C, continue to stir for 2h, and test that the percentage of isocyanate is 6%, that is, the polyurethane prepolymer is prepared, and filled with nitrogen Sealed storage;

[0075] Two, 100g polyurethane prepolymer and 5.03g molecular weight are the epoxy resin of 400 fully mixed, make A component;

[0076] 3. Heat and melt 11.5g of 1,4-butanediol (curing agent), mix with 10g of auxiliary agent 1, 0.1g of N-dimethylbenylamine (reaction accelerator) and 2.1g of aminopropyltriethoxysilane (silane Coupling agent) is fully mixed to obtain component B;

[0077] 4. Mix and cast the component A prepared in step 2 and the component B prepared in step 3, cure at room temperature for 24 hours, and then cure...

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Abstract

The invention discloses a waterproof encapsulating material and preparation method thereof and relates to a plastic composition based on polyurethane and epoxy resin and a preparation method thereof. The invention aims to provide a waterproof encapsulating material which has high waterproofness, excellent electrical property and flexibly controlled mechanical property and a preparation method thereof. The waterproof encapsulating material comprises components A and B, wherein the component A is polyurethane prepolymer, or epoxy resin, or mixture of polyurethane prepolymer and epoxy resin; the polyurethane prepolymer comprises isocyanate and high-molecular-weight polyol; the component B comprises a curing agent, a reaction accelerant, an auxiliary and a silane coupling agent. The preparation method of the waterproof encapsulating material comprises the following steps: preparing the polyurethane prepolymer; preparing the component A; preparing the component B; mixing and pouring, and curing at room temperature. The waterproof encapsulating material prepared by the invention has corrosion resistance, high waterproofness, excellent electric property, strong tenacity, and flexibly controlled mechanical property. The waterproof encapsulating material is used for the encapsulating field of the underwater electric appliance.

Description

technical field [0001] The invention relates to a preparation method of a plastic composition based on polyurethane and epoxy resin, in particular to a preparation method of a waterproof potting material based on polyurethane and epoxy resin composite material. Background technique [0002] In order to survive and develop, human beings vigorously develop water resources. The concept of water resources development is the whole act of exploring, exploiting and utilizing underwater mineral resources, biological resources, water resources and space resources by using technical means. According to the different attributes of the developed resources, it can be divided into five aspects: biological resource development, mineral resource development, chemical resource development, energy development, and space utilization. Human beings have been developing water resources for thousands of years. Taking ocean development as an example, from the 1620s to the 1950s, some coastal count...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/08C08L63/00C08G59/24C08G59/62C08G59/56C08G59/50C08K5/12C08K5/544
Inventor 陈伟
Owner 李春梅
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