Polyurethane adhesive, preparation method thereof and heat-conducting adhesive tape

A polyurethane adhesive and adhesive tape technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as low thermal conductivity and affect heat dissipation, so as to improve thermal conductivity, improve thermal conductivity, and improve performance Effect

Inactive Publication Date: 2017-07-25
东莞市普力达光学材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a polyurethane adhesive and a preparation method thereof, which are used to solve the technical problems of low thermal conductivity of existing polyurethane adhesives and affecting heat dissipation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The present embodiment provides a kind of preparation method of polyurethane adhesive, comprises the steps:

[0029] Step 1: Add 10 parts by weight of polyester polyol into the reaction kettle, and vacuum dehydrate for 4 hours;

[0030] Wherein, the polyester polyol is polycarbonate polyol, specifically, polycarbonate diol, a white waxy solid with a hydroxyl value of 100 mgKOH / g, which can provide high cohesive force and high bonding strength. prepolymer.

[0031] Step 2: 1 part by weight of a silane coupling agent couples 6 parts by weight of graphene oxide to obtain the processed graphene oxide, and adds the processed graphene oxide and 70 parts by weight of the combined solvent to the compound prepared in step 1. Said reactor, ultrasonic 2.5 hours;

[0032] Wherein, the combined solvent includes a composition of methylene chloride and acetoketone, wherein the mass ratio of methylene chloride and acetoketone is 4:1, and the compatibility of each raw material can be ...

Embodiment 2

[0054] Step 1: Add 12 parts by weight of polycaprolactone polyol into the reaction kettle, and vacuum dehydrate for 5 hours.

[0055] Step 2: 3 parts by weight of a silane coupling agent couples 10 parts by weight of graphene oxide to obtain the treated graphene oxide, and adds the treated graphene oxide and 77 parts by weight of the combined solvent to the compound prepared in step 1. Said reactor, ultrasonic 4 hours;

[0056] Wherein, the combined solvent comprises a composition of dichloromethane and acetone, wherein the mass ratio of dichloromethane and acetone is: 6:1.

[0057] Step 3: Add 38 parts by weight of isocyanate, 3 parts by weight of catalyst and 6 parts by weight of chain extender into the reactor described in step 2, and heat at 80-90°C for 5 hours;

[0058] Wherein, the isocyanate includes a composition of toluene diisocyanate and diphenylmethane diisocyanate, wherein the mass ratio of toluene diisocyanate to diphenylmethane diisocyanate is 12:1; the catalys...

Embodiment 3

[0062] Step 1: Add 14 parts by weight of polycaprolactone polyol into the reaction kettle, and vacuum dehydrate for 6 hours.

[0063] Step 2: 5 parts by weight of a silane coupling agent couples 6 parts by weight of graphene oxide to obtain the treated graphene oxide, and adds the treated graphene oxide and 80 parts by weight of a combined solvent to the one prepared in step one. Described reactor, ultrasonic 8 hours;

[0064] Wherein, the combined solvent comprises a composition of dichloromethane and acetone, wherein the mass ratio of dichloromethane and acetone is: 8:1.

[0065] Step 3: Add 38 parts by weight of isocyanate, 3 parts by weight of catalyst, and 6 parts by weight of chain extender into the reactor described in step 2, and heat at 80-90°C for 5 hours;

[0066] Wherein, the isocyanate comprises a composition of toluene diisocyanate and diphenylmethane diisocyanate, wherein the mass ratio of toluene diisocyanate to diphenylmethane diisocyanate is 15:1; the cataly...

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Abstract

The invention discloses a preparation method of a polyurethane adhesive. The preparation method comprises the following steps: (1) adding polyester polyol into a reaction kettle, and carrying out vacuum dehydration; (2) coupling graphene oxide with a silane coupling agent so as to obtain processed graphene oxide, adding processed graphene oxide and a combined solvent into the reaction kettle of the step (1), and carrying out ultrasonic treatment for 2-8 hours; (3) adding isocyanate, a catalyst and a chain extender into the reaction kettle of the step (2), heating to 80-90 DEG C, and reacting for 2-7 hours; and (4) carrying out vacuum distillation on substances in the reaction kettle of the step (3) at 80-90 DEG C, cooling, and discharging, so as to obtain the polyurethane adhesive. The polyurethane adhesive prepared by virtue of the preparation method is high in heat conductivity coefficient and peel strength.

Description

technical field [0001] The invention relates to the technical field of adhesive tapes, in particular to a polyurethane adhesive, a preparation method thereof, and a thermally conductive adhesive tape. Background technique [0002] Polyurethane is a type of polymer whose main chain contains -NHCOO- repeating structural units, abbreviated as PU, which is polymerized from isocyanate (monomer) and hydroxyl compound. Due to the strong polar carbamate group, insoluble in non-polar groups, it has good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (-50 to 150°C) can be prepared with different raw materials, including adhesives, elastomers, thermoplastic resins and thermosetting resins. [0003] Polyurethane adhesives contain highly polar and chemically active -NCO- (isocyanate), -NHCOO- (urethane groups), polyurethane adhesives show high activity and polarity, and contain active hydrogen Substrates, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/04C08G18/44C08G18/42C08G18/76C08G18/66C09J7/02
CPCC08G18/3206C08G18/4277C08G18/44C08G18/664C08G18/7614C08G18/7671C08K3/04C08K9/06C09J7/255C09J11/04C09J175/06C09J2301/122C09J2301/124C09J2301/312C09J2301/408C09J2400/28C09J2467/006C09J2475/00
Inventor 蒋可可蒋友
Owner 东莞市普力达光学材料科技有限公司
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