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Ultralow-hardness polyurethane pouring sealant and preparation and application thereof

A potting and polyurethane technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve the problems of long curing time and low application efficiency, and achieve excellent electronic insulation performance, less bubbles, The effect of low mixing viscosity

Active Publication Date: 2016-08-31
BEIJING POLYSTAR HITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such low-hardness potting compounds tend to take longer to cure, resulting in inefficient application

Method used

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  • Ultralow-hardness polyurethane pouring sealant and preparation and application thereof
  • Ultralow-hardness polyurethane pouring sealant and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 A kind of ultra-low hardness polyurethane potting glue

[0027] This embodiment provides an ultra-low hardness polyurethane potting compound, which includes the following components:

[0028] The component A is prepared from the following components by weight: 96.9 parts of castor oil, 0.5 parts of composite anti-yellowing agent, 0.4 parts of catalyst DY-5300, 0.5 parts of catalyst DY-20, and 0.2 parts of defoamer BYK-1794 parts, coupling agent KH-560 1.5 parts;

[0029] The component B is prepared from the following components by weight: 70 parts of plasticizer DOP, 20 parts of SUP2020, and 10 parts of HB 8960B.

[0030] Concrete preparation method comprises the following steps:

[0031] Preparation of component A: Add castor oil into the reaction kettle, vacuumize at 100°C for 3.5 hours to dehydrate to make the water content <0.05%, lower the temperature to 30°C, add 0.4 parts of catalyst DY-5300, 0.5 parts of DY-20, 0.2 parts of foaming agent BYK-1794...

Embodiment 2

[0033] Embodiment 2 A kind of ultra-low hardness polyurethane potting glue

[0034] This embodiment provides an ultra-low hardness polyurethane potting compound, which includes the following components:

[0035] The component A is prepared from the following components by weight: 96.4 parts of castor oil, 0.5 parts of composite anti-yellowing agent, 0.6 parts of catalyst DY-5350, 0.3 parts of DY-20, and 0.2 parts of defoamer BYK-1794 , 2.0 parts of coupling agent KH-560;

[0036] The component B is prepared from the following components in parts by weight: plasticizer DOP 70 parts, Sup2020 24 parts, Sup 2439 6 parts.

[0037] Concrete preparation method comprises the following steps:

[0038] Component A: Add 96.4 parts of castor oil into the reaction kettle, vacuumize at 100°C for 3 hours to dehydrate to make the water content <0.05%, cool down to 30°C, add 0.6 parts of catalyst DY-5350, 0.3 parts of DY-20, 0.2 parts of foam agent BYK-1794, 0.5 parts of compound anti-yello...

Embodiment 3

[0040] Embodiment 3 A kind of ultra-low hardness polyurethane potting glue

[0041] This embodiment provides an ultra-low hardness polyurethane potting compound, which includes the following components:

[0042] The component A is prepared from the following components by weight: 95.9 parts of castor oil, 0.5 parts of compound anti-yellowing agent, 0.4 parts of catalyst 1619, 0.2 parts of defoamer BYK-066N, and 1.0 parts of coupling agent KH-792 Parts, plasticizer DOP 2 parts,;

[0043] The component B is prepared from the following components in parts by weight: plasticizer DOP 68 parts, Sup2511 32 parts.

[0044] Concrete preparation method comprises the following steps:

[0045] Component A: Add 95.9 parts of castor oil and 2 parts of DOP into the reaction kettle, vacuumize at 100°C for 3.5 hours to dehydrate, make the water content <0.05%, cool down to 25°C, add 0.4 parts of catalyst 1619, defoamer BYK 0.2 part of -066N, 0.5 part of compound anti-yellowing agent, 1.0 pa...

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Abstract

The invention relates to an ultralow-hardness polyurethane pouring sealant and a preparation method and application thereof. The polyurethane pouring sealant is composed of a component A and a component B, wherein the component A is prepared from, by weight, 90-100 parts of Polypolyol, 0.1-1 part of compound type anti-yellowing agent, 0.1-2 parts of catalyst, 0.1-1 part of defoaming agent, 0.1-5 parts of coupling agent and 0-10 parts of plasticizer, the component B is prepared from, by weight, 30-40 parts of polyisocyanate and 60-70 parts of plasticizer. The pouring sealant can be suitable for automatic pouring of handwork, is short in curing time at room temperature, and has the advantages of being transparent, few in bubble, high in insulativity, high in adhesion to metal and the like after being cured.

Description

technical field [0001] The invention relates to an ultra-low hardness polyurethane potting glue, a preparation method and application thereof, and belongs to the technical field of electronic potting. Background technique [0002] At present, the production process of some electronic component potting manufacturers cannot be heated externally or cannot be heated. The entire construction process needs to be poured manually at room temperature. Therefore, the potting compound is required to have good fluidity at room temperature. Usually this kind of encapsulant is prepared by one-step method or semi-prepolymerization method, rather than the commonly used prepolymer method. However, the potting adhesives prepared by the one-step method or the semi-prepolymerization method in the prior art have disadvantages such as high viscosity, long curing time at room temperature, poor mechanical properties, many bubbles, and poor transparency. [0003] In addition, some electronic compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J11/06C08G18/79C08G18/76C08G18/36
CPCC08G18/36C08G18/7671C08G18/794C08G2190/00C08K5/12C08K5/5435C08K5/544C08L2201/08C08L2203/206C09J11/06C09J175/04
Inventor 谭锦锦王捷
Owner BEIJING POLYSTAR HITECH CO LTD
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