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Polyurethane adhesive, preparation method thereof and conductive adhesive tape

A polyurethane adhesive and conductive tape technology, applied in the direction of polyurea/polyurethane adhesives, adhesives, adhesive types, etc., can solve problems such as poor electrical conductivity, improve electrical conductivity, reduce electron migration, and improve electrical conductivity. 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

[0006] The purpose of the present invention is to provide a polyurethane adhesive and its preparation method, which is used to solve the technical problem of poor electrical conductivity of the existing polyurethane adhesive

Method used

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  • Polyurethane adhesive, preparation method thereof and conductive adhesive tape
  • Polyurethane adhesive, preparation method thereof and conductive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The present embodiment provides a kind of preparation method of polyurethane adhesive, comprises the steps:

[0028] Step 1: Add 10 parts by weight of polyester polyol into the reaction kettle, and vacuum dehydrate for 4 hours;

[0029] 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.

[0030] Step 2: Add 30 parts by weight of isocyanate, 70 parts by weight of combined solvent, 1 part by weight of catalyst, and 4 parts by weight of crosslinking agent into the reactor described in step 1, heat at 80-90°C, and react for 2 hours;

[0031] Wherein, the combined solvent includes a composition of methylene chloride and acetoketone, wherein the mass ratio of methylene chloride and acetoketone is 5:1, and the combined solvent is used to improve solubility, adjust volatility, and adapt to different bonding ...

Embodiment 2

[0054] Step 1: Add 15 parts by weight of polycaprolactone polyol into the reaction kettle, and vacuum dehydrate for 5 hours.

[0055] Step 2: Add 35 parts by weight of isocyanate, 62 parts by weight of combined solvent, 3 parts by weight of catalyst, and 7 parts by weight of crosslinking agent into the reactor described in step 1, heat at 80-90°C, and react for 3 hours;

[0056] Wherein, the combined solvent comprises a composition of methylene chloride and acetone, wherein the mass ratio of methylene chloride and acetone is: 8:1;

[0057] Described isocyanate comprises the composition of toluene diisocyanate and diphenylmethane diisocyanate, and the mass ratio of toluene diisocyanate and diphenylmethane diisocyanate is: 7:1;

[0058] The catalyst is 2,2-dimorpholino diethyl ether; the crosslinking agent is trimethylol propane.

[0059] Step 3: Dissolve 5 parts by weight of nano-nickel powder in 21 parts by weight of combined solvent, add the reaction kettle described in step...

Embodiment 3

[0063] Step 1: Add 12 parts by weight of polycaprolactone polyol into the reaction kettle, and vacuum dehydrate for 6 hours.

[0064] Step 2: Add 40 parts by weight of isocyanate, 50 parts by weight of combined solvent, 2 parts by weight of catalyst, and 8 parts by weight of crosslinking agent into the reactor described in step 1, heat at 80-90°C, and react for 4 hours;

[0065] Wherein, the combined solvent comprises a composition of methylene chloride and acetone, wherein the mass ratio of methylene chloride and acetone is: 10:1;

[0066] Described isocyanate comprises the composition of toluene diisocyanate and diphenylmethane diisocyanate, and the mass ratio of toluene diisocyanate and diphenylmethane diisocyanate is: 7:1;

[0067] The catalyst is 2,2-dimorpholino diethyl ether; the crosslinking agent is hexanetriol.

[0068] Step 3: Dissolve 5 parts by weight of nano-nickel powder in 21 parts by weight of combined solvent, add the reaction kettle described in step 2, and...

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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 for 4-6 hours; (2) adding isocyanate, a combined solvent, a catalyst and a cross-linking agent into the reaction kettle of the step (1), heating to 80-90 DEG C, and reacting for 2-4 hours; (3) dissolving nano-nickel powder into the combined solvent, adding the combined solvent into the reaction kettle of the step (2), and uniformly mixing; 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 good in conductivity and high in peel strength.

Description

technical field [0001] The invention relates to the technical field of tapes, in particular to a polyurethane adhesive, a preparation method thereof, and a conductive 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 as porous materials such as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C09J11/04C09J9/02C09J7/02C08G18/44C08G18/42C08G18/66C08G18/76C08G18/32
CPCC08G18/3206C08G18/3281C08G18/4277C08G18/44C08G18/6648C08G18/7614C08G18/7671C08K2003/0862C08K2201/001C08K2201/011C09J7/255C09J9/02C09J11/04C09J175/06C09J2301/122C09J2301/124C09J2301/312C09J2301/314C09J2301/408C09J2400/16C09J2467/006C09J2475/00
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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