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Solvent-free three-component polyurethane adhesive and preparation method thereof

A polyurethane adhesive, three-component technology, applied in polyurea/polyurethane adhesives, adhesive types, adhesive additives, etc., can solve poor wettability, poor product surface smoothness, pitting or White spots etc.

Inactive Publication Date: 2020-10-27
DONGGUAN ZHUOYUE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the lithium battery flexible packaging industry, polyurethane adhesives are mainly used for material compounding. At present, the common and maturely used polyurethane adhesives in the lithium battery flexible packaging industry mainly fall into two categories: solvent-based two-component and solvent-free two-component Polyurethane adhesives, in which the two-component refers to the main agent and the curing agent, the existing two-component polyurethane adhesive due to poor wettability, lead to pitting or white spots when the material is compounded, the product surface is poor in smoothness, aesthetics Low, greatly reducing the product yield

Method used

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  • Solvent-free three-component polyurethane adhesive and preparation method thereof
  • Solvent-free three-component polyurethane adhesive and preparation method thereof
  • Solvent-free three-component polyurethane adhesive and preparation method thereof

Examples

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preparation example Construction

[0038] As mentioned above, in the first aspect, the present invention provides a method for preparing a solvent-free three-component polyurethane adhesive, the preparation method comprising the following steps:

[0039] (1) Preparation of component A:

[0040] (1.1) Material preparation: Weigh raw materials according to the following parts by mass

[0041]

[0042] (1.2) Preparation of component A: raise the temperature of the reactor to 40-85°C, add polyether polyol, start stirring, then add polyester polyol, crosslinking agent, catalyst, filler and chain extender, and continue stirring until Evenly, then vacuum dehydrate until the water content is <0.05%, and finally cool, seal and store to obtain component A;

[0043] (2) Preparation of component B:

[0044] (2.1) Material preparation: Weigh raw materials according to the following parts by mass

[0045] 90-100 parts of isocyanate,

[0046] 100-110 parts of polyester polyol,

[0047] Catalyst 0.7~1 part;

[0048] (...

Embodiment 1

[0061] This example is used to illustrate the preparation method of a solvent-free three-component polyurethane adhesive according to the present invention. The preparation method includes the following steps:

[0062] (1) Preparation of component A:

[0063] The temperature of the reactor was raised to 40-85°C, 60 parts by mass of polypropylene glycol and 25 parts by mass of epoxy soybean oil modified polyol were added, stirring was started, and then 30 parts by mass of castor oil and 5 parts by mass of xylose were added Alcohol, 0.5 parts by mass of dibutyltin dilaurate, 1 part by mass of calcium carbonate and 1 part by mass of 2,6-diethylaniline, continue to stir until uniform, then vacuum dehydrate until the water content <0.05%, and finally cool , sealed and preserved to obtain component A;

[0064] (2) Preparation of component B:

[0065] Add 90 parts by mass of dicyclohexyl diisocyanate and 110 parts by mass of castor oil into the reactor, stir evenly at room temperat...

Embodiment 2

[0070] This example is used to illustrate the preparation method of a solvent-free three-component polyurethane adhesive according to the present invention. The preparation method includes the following steps:

[0071] (1) Preparation of component A:

[0072] Raise the temperature of the reactor to 40-85°C, add 50 parts by mass of low molecular weight liquid polyethylene glycol and 50 parts by mass of polytetrahydrofuran glycol, start stirring, then add 15 parts by mass of castor oil, 8 parts by mass of sorbic acid Sugar alcohol, 0.7 mass parts of stannous octoate, 1 mass part of calcium carbonate and 1 mass part of 1,4-butanediol, continue to stir until uniform, then vacuum dehydrate until the water content <0.05%, finally cool and seal Save to get component A;

[0073] (2) Preparation of component B:

[0074] Add 95 parts by mass of toluene diisocyanate and castor oil of 105 parts by mass in the reactor, stir evenly at room temperature, then vacuumize and dehydrate, then a...

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Abstract

The invention provides a solvent-free three-component polyurethane adhesive and a preparation method thereof. The preparation method comprises the following steps that the temperature of a reaction kettle is increased to 40-85 DEG C, polyether polyol is added, then polyester polyol, a cross-linking agent, a catalyst, a filler and a chain extender are added, the mixture is stirred to be uniform, and a component A is obtained; isocyanate and polyester polyol are added into a reaction kettle, then a catalyst is added, heating reaction is carried out, and heating is stopped when the content of NCOis stable, so as to obtain a component B; hydrogen-terminated polydimethylsiloxane and single-ended allyl polycaprolactone are mixed, a solvent is added, followed by standing until the mixed solutionis clear and transparent, a Karstedt catalyst is added, followed by continuously stirring and standing, the lower clear solution is taken, and distilling is carried out to remove low-boiling-point substances, thereby obtaining a component C; 20-25 parts by mass of the component A and 10-15 parts by mass of the component B are mixed and stirred, then 0.6-1.5 parts by mass of the component C is then added, followed by stirring to obtain the polyurethane adhesive. The surface smoothness of the composite material can be improved.

Description

technical field [0001] The invention relates to a polyurethane adhesive, in particular to a solvent-free three-component polyurethane adhesive and a preparation method thereof. Background technique [0002] Polyurethane adhesives refer to adhesives containing carbamate groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. In the lithium battery flexible packaging industry, polyurethane adhesives are mainly used for material compounding. At present, the common and maturely used polyurethane adhesives in the lithium battery flexible packaging industry mainly fall into two categories: solvent-based two-component and solvent-free two-component Polyurethane adhesives, in which the two-component refers to the main agent and the curing agent, the existing two-component polyurethane adhesive due to poor wettability, lead to pitting or white spots when the material is compounded, the product surface is poor in smoothness, aesthetics Low, which greatly reduces the yiel...

Claims

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Application Information

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IPC IPC(8): C09J175/14C09J11/04C08G18/75C08G18/68C08G18/66C08G18/61C08G18/48C08G18/40C08G18/36C08G18/32
CPCC08G18/3206C08G18/3228C08G18/36C08G18/4081C08G18/4825C08G18/61C08G18/6696C08G18/68C08G18/758C09J11/04C09J175/14C08K3/26
Inventor 杨虎凌松莫德稳习中平任重远周宇
Owner DONGGUAN ZHUOYUE NEW MATERIAL TECH CO LTD
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