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Flame-retardant synthetic film with excellent thermal conductivity and preparation method thereof

A thermal conductivity, synthetic film technology, applied in the direction of film/sheet adhesive, adhesive type, adhesive additive, etc., can solve the problems of affecting the heat resistance of thermally conductive labels, poor coating, safety hazards, etc.

Pending Publication Date: 2021-09-10
SHENZHEN LICHANGSHI ADHESIVE PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the temperature resistance range of the existing heat conduction labels is mostly 200-600°C, the heat conduction temperature resistance range of which is relatively low, and the ratio relationship between glue and heat conduction powder will affect the heat resistance of the heat conduction adhesive. Thermal properties, which in turn affect the heat resistance of the thermally conductive label; the particle size of the thermally conductive powder will affect the unevenness of the coating, making the coating poor, and the improvement of thermal conductivity is also easy to conduct electricity, causing a short circuit on the PCB and causing safety hazards. Therefore, taking into account It is particularly important to have excellent thermal conductivity while being safe, and a flame-retardant synthetic film with excellent thermal conductivity and its preparation method are proposed

Method used

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  • Flame-retardant synthetic film with excellent thermal conductivity and preparation method thereof

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Embodiment 1

[0034] A flame-retardant synthetic film with excellent thermal conductivity, the main components include:

[0035] Thermally conductive adhesive, the main raw material component ratio of thermally conductive adhesive is flame retardant polyacrylate: isocyanate: graphite thermally conductive powder = 100: (0.1-5): 5.5;

[0036] Thermally conductive coating, the main raw material component ratio of the thermally conductive coating is modified polyurethane: graphite thermally conductive powder = 100: (10-100);

[0037] Wherein, the thermally conductive adhesive is coated on the thermally conductive coating.

[0038] It should be understood that, by adopting the relevant ratio of graphite heat-conducting powder in this heat-conducting adhesive, the heat resistance of the heat-conducting adhesive can be improved, thereby improving the safety of the heat-conducting adhesive during use; The particle size is 1-3um, which can prevent the rubber surface of the thermally conductive adhe...

Embodiment 2

[0046] A method for preparing a flame-retardant synthetic film with excellent thermal conductivity, mainly comprising the following steps:

[0047] A. The thermally conductive coating is prepared from 55 parts of graphite thermal powder and 100 parts of modified polyurethane. Since the ink in the thermally conductive coating has a solid content of about 36%, and the viscosity of the ink is high, the thermally conductive coating should be pretreated first. , filter the thermally conductive coating, and add curing agent and ethyl acetate to dilute after filtering;

[0048] B, prepare heat conduction glue, add 2.5 parts of graphite heat conduction powders in the aqueous solution that is mixed with surfactant, make graphite powder solution;

[0049] Add 100 parts of flame retardant polyacrylate, 2.5 parts of isocyanate, 7.5 parts of polydimethylsiloxane, 11 parts of polyethylene glycol ether and crosslinking agent to the graphite powder solution and mix, so that the graphite powde...

Embodiment 3

[0059] A method for preparing a flame-retardant synthetic film with excellent thermal conductivity, mainly comprising the following steps:

[0060] A. The thermally conductive coating is prepared from 100 parts of graphite thermal powder and 100 parts of modified polyurethane. Since the ink in the thermally conductive coating has a solid content of about 36%, and the viscosity of the ink is high, the thermally conductive coating should be pretreated first. , filter the thermally conductive coating, and add curing agent and ethyl acetate to dilute after filtering;

[0061] B, prepare heat-conducting glue, add 5.5 parts of graphite heat-conducting powders in the aqueous solution that is mixed with surfactant, make graphite powder solution;

[0062] Add 100 parts of flame-retardant polyacrylates, 5 parts of isocyanate, 10 parts of polydimethylsiloxane, 12 parts of polyglycol ether and cross-linking agent to the graphite powder solution and mix, so that the graphite powder particl...

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Abstract

The invention discloses a flame-retardant synthetic film with excellent thermal conductivity and a preparation method thereof, belonging to the technical field of electronic heat-conducting surfaces and PCBs (printed circuit boards). The main components of the flame-retardant synthetic film with excellent thermal conductivity in the invention comprises: a heat-conducting adhesive, wherein the heat-conducting adhesive comprises main raw material components including flame-retardant polyacrylate, isocyanate and graphite heat-conducting powder in a ratio of 100: (0.1-5): 5.5; and a heat-conducting coating, which comprises main raw material components including modified polyurethane and graphite heat-conducting powder in a ratio of 100: (10-100), wherein the heat-conducting adhesive coats the heat-conducting coating. By adopting the related proportion of the graphite heat-conducting powder in the heat-conducting adhesive, the heat resistance of the heat-conducting adhesive can be improved, so the safety of the heat-conducting adhesive during use is improved; and the particle size of the graphite heat-conducting powder in the heat-conducting adhesive and the heat-conducting coating is in a range of 1-3 microns, so adhesive lines on an adhesive surface caused by overlarge particles on the adhesive surface of the heat-conducting adhesive can be prevented, and the surface of the heat-conducting coating is prevented from generating pits.

Description

technical field [0001] The invention relates to the technical field of electronic heat-conducting surfaces and PCB circuit boards, in particular to a flame-retardant synthetic film with excellent thermal conductivity and a preparation method thereof. Background technique [0002] PCB circuit board, also known as printed circuit board, is an important electronic component, a support for electronic components, and a carrier for electrical connections of electronic components; [0003] With the rapid development of computers, more components are integrated on the same area of ​​the circuit board, resulting in more heat per unit area, affecting the efficacy of electronic products and causing some safety hazards, so an insulating and thermally conductive Materials with good effect can efficiently dissipate heat while greatly improving product performance and reducing safety hazards. This kind of product has great potential for market demand; [0004] The temperature resistance r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/30C09J7/40C09J133/04C09J11/04C09J11/08C09D175/04C09D7/61
CPCC09J7/30C09J7/405C09J133/04C09J11/04C09J11/08C09D175/04C09D7/61C08L2205/03C08L2201/02C09J2301/408C08K3/04C08L83/04C08L71/02
Inventor 王磊黄伟王益刚
Owner SHENZHEN LICHANGSHI ADHESIVE PROD
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