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One-component polyurethane potting adhesive and preparation method thereof

A technology of polyurethane and potting glue, which is applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., and can solve the problems affecting the performance of potting glue, the limited defoaming ability of defoamers, and the hindrance of filler dispersion, etc. problem, to achieve the effect of accelerating the curing speed, high bonding strength, and meeting the requirements of potting

Inactive Publication Date: 2019-07-16
安徽匠星联创新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent CN105255432B discloses a polyurethane encapsulant. Although the encapsulant has good performance, the encapsulant is composed of component A and component B, and belongs to two-component polyurethane encapsulant. Mixing component A and component B increases the workload; and although the potting compound adds a defoamer to reduce bubbles, the defoamer has limited defoaming ability and there are still many bubbles
The existence of air bubbles will hinder the dispersion of fillers, and at the same time affect the performance of the prepared potting compound

Method used

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  • One-component polyurethane potting adhesive and preparation method thereof
  • One-component polyurethane potting adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw materials are prepared as follows:

[0031] raw material Dosage / g Polyether diol 2000 100 Polyether diol 4000 200 long chain chlorinated paraffins 120 talcum powder 120 Kaolin 200 Neopentyl glycol 3 Diisocyanate MDI 37 Dibutyltin dilaurate 1 Defoamer polyether modified silicone copolymer 1 acetone 20 magnesium oxide 12

[0032] Add polyether glycol 2000, polyether glycol 4000, talc powder, kaolin, long-chain chlorinated paraffin, polyether modified siloxane copolymer to the reaction kettle in sequence, and heat up to 110°C while stirring. Dehydrate for 2 hours, lower the temperature to 80°C, slowly add diisocyanate MDI dropwise, under nitrogen protection, control the reaction speed, keep the temperature for 4 hours, make the -OH reaction in the system complete, then add neopentyl glycol and acetone, and keep the reaction for 3 hours at 80°C. Then add dibutyltin dilaurate and magnesi...

Embodiment 2

[0034] The raw materials are prepared as follows:

[0035] raw material Dosage / g Polyether Triol 3000 150 Polyether diol 4000 210 long chain chlorinated paraffins 150 talcum powder 60 Ground calcium carbonate 400 Trimethylolpropane 3 Diisocyanate MDI 42 Dibutyltin dilaurate 1 Defoamer polyether modified silicone copolymer 1 Dimethyl carbonate 20 magnesium oxide 15

[0036] Add polyether trihydric alcohol 3000, polyether dihydric alcohol 4000, talcum powder, heavy calcium carbonate, long-chain chlorinated paraffin, polyether modified siloxane copolymer in sequence in the reaction kettle, and heat up to 110°C, dehydrate for 2 hours, cool down to 80°C, slowly add diisocyanate MDI dropwise, under nitrogen protection, control the reaction speed, keep warm for 4 hours to make the -OH in the system react completely, then add trimethylolpropane and dimethyl carbonate , keep warm at 80°C for 3 hours, then ...

Embodiment 3

[0038] The raw materials are prepared as follows:

[0039]

[0040]

[0041] Add polyether diol 2000, polyether triol 5000, heavy calcium carbonate, chlorinated palm oil, polyether-modified siloxane copolymer to the reaction kettle in turn, heat up to 110°C while stirring, and dehydrate 2h, cool down to 80°C, slowly add diisocyanate IPDI, nitrogen protection, control the reaction speed, keep warm for 4h, make the -OH reaction in the system complete, then add dimethylol propionic acid, dimethyl carbonate, 80°C Insulate and react for 3 hours, then add dibutyltin dilaurate and calcium oxide in sequence, stir evenly, cool down to 50°C, discharge, and seal for storage.

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Abstract

The invention discloses a one-component polyurethane potting adhesive and a preparation method thereof, which relates to the technical field of adhesive product preparation. The one-component polyurethane potting adhesive comprises the following raw materials in parts by weight: 30-50 parts of diisocyanate, 100-400 parts of polyether polyol, 2-4 parts of a chain extender, 1-3 parts of catalyst, 1-2 parts of defoamer, 300-800 parts of filler, 100-200 parts of environmental protection plasticizer, 10-20 parts of foam absorbent and 10-30 parts of organic solvent. As that potting adhesive preparedby the invention belongs to a single-component polyurethane potting adhesive, the potting adhesive is convenient to use and avoids the problem that the two components need to be uniformly mixed whenthe two-component polyurethane potting adhesive is used. Moreover, the potting adhesive has high adhesive strength, excellent high temperature resistance, mechanical properties, electrical propertiesand adhesive properties, which meet the requirements of electronic components potting.

Description

[0001] Technical field: [0002] The invention relates to the technical field of adhesive product preparation, in particular to a one-component polyurethane potting adhesive and a preparation method thereof. [0003] Background technique: [0004] With the rapid development of electronic technology, high-tech fields such as electronic components, large integrated circuit boards, and power circuit modules have further achieved high power, high performance, and miniaturization. The environment is becoming more and more harsh, and electronic components will be affected by factors such as mechanical external force, high temperature and high humidity environment, physical and chemical substance pollution and electrical leakage during production, transportation, storage and use. This requires that electronic potting materials not only need to have good high temperature resistance, mechanical properties and electrical properties, but also put forward higher requirements for the adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C08G18/66C08G18/48C08G18/32
CPCC08G18/4808C08G18/4812C08G18/6674C08G18/6677C08K2003/2206C08K2003/222C08K2003/265C09J11/04C09J175/08C08K3/34C08K3/346C08K3/22C08K3/26
Inventor 刘明星孙学武周静静
Owner 安徽匠星联创新材料科技有限公司
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