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Two-component adhesive layer polyurethane resin for synthetic leather and preparation method of two-component adhesive layer polyurethane resin

A polyurethane resin and two-component technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., to achieve the effect of increasing turnover times and utilization efficiency, and reducing production energy consumption

Active Publication Date: 2014-11-12
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of two-component type adhesive layer polyurethane resin for synthetic leather, to solve the above-mentioned technical problem that existing two-component type adhesive layer polyurethane resin exists
[0004] Another object of the present invention is to provide the preparation method of the above-mentioned two-component adhesive layer polyurethane resin for synthetic leather, to solve the above-mentioned technical problems existing in the existing two-component adhesive layer polyurethane resin

Method used

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  • Two-component adhesive layer polyurethane resin for synthetic leather and preparation method of two-component adhesive layer polyurethane resin
  • Two-component adhesive layer polyurethane resin for synthetic leather and preparation method of two-component adhesive layer polyurethane resin
  • Two-component adhesive layer polyurethane resin for synthetic leather and preparation method of two-component adhesive layer polyurethane resin

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Experimental program
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Effect test

Embodiment 1

[0019] The raw materials used in this embodiment and their weight are shown in Table 1.

[0020] Table 1

[0021] raw material name

Weight (unit: g)

Polytetrahydrofuran ether glycol (number average molecular weight 2000)

320

2,2-Dimethylolpropionic acid

32.16

Ethylene glycol

14.88

diphenylmethane diisocyanate

144

dimethylformamide

125.25

toluene

83.5

[0022] The preparation steps of the two-component adhesive layer polyurethane resin for synthetic leather of the present embodiment are as follows:

[0023] 1) Put 104g of dimethylformamide, 320g of polytetrahydrofuran ether glycol, 32.16g of 2,2-dimethylolpropionic acid and 14.88g of ethylene glycol into the reaction kettle, and stir evenly at 50-55°C;

[0024] 2) Put 144g of diphenylmethane diisocyanate into the reactor in batches, strictly control the reaction temperature between 65-70°C, and react under normal pressure for 7 hours, and u...

Embodiment 2

[0026] The raw materials used in this embodiment and their weight are shown in Table 2.

[0027] Table 2

[0028] raw material name

Weight (unit: g)

Polybutylene adipate diol (number average molecular weight 1000)

40

Polybutylene adipate diol (number average molecular weight 3000)

120

2,2-Dimethylolpropionic acid

6.432

[0029] Ethylene glycol

11.904

diphenylmethane diisocyanate

80

dimethylformamide

506

butanone

126.5

[0030] The preparation steps of the two-component adhesive layer polyurethane resin for synthetic leather of the present embodiment are as follows:

[0031] 1) Mix 190g of dimethylformamide, 40g of polybutylene adipate diol with a number average molecular weight of 1000, 120g of polybutylene adipate diol with a number average molecular weight of 3000, 6.432g2,2 - Put dimethylolpropionic acid and 11.904g ethylene glycol into the reaction kettle, and stir...

Embodiment 3

[0034] The raw materials used in this embodiment and their weight are shown in Table 3.

[0035] table 3

[0036]

[0037] The preparation steps of the two-component adhesive layer polyurethane resin for synthetic leather of the present embodiment are as follows:

[0038] 1) Mix 171g of dimethylformamide, 320g of polyethylene adipate, butanediol copolyester diol, 5.36g of 2,2-dimethylolpropionic acid, 1.8g of 1,4-butanediol and 1.24g of ethyl Put the diol into the reaction kettle, stir evenly at 55-60°C;

[0039] 2) Put 60g of diphenylmethane diisocyanate into the reaction kettle in batches, strictly control the reaction temperature between 75-80°C, and react at normal pressure for 9 hours, and according to the viscosity of the system, use the remaining dimethylformamide and butyl The ketone is diluted in stages, and the final viscosity is controlled at 60-120Pa.S25°C to obtain a two-component adhesive layer polyurethane resin for synthetic leather.

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Abstract

The invention provides a using a two-component adhesive layer polyurethane resin for a synthetic leather and a preparation method of the two-component adhesive layer polyurethane resin. The two-component adhesive layer polyurethane resin disclosed by the invention comprises the following raw materials: polyol, chain extenders, diisocyanate and a solvent, wherein the total molar ratio of chain extenders to polyol is (0.5:1)-(3:1); the total molar ratio of diisocyanate to polyol is (1.5:1)-(4:1); the solvent accounts for 29%-71% of the total mass of polyol, chain extenders, diisocyanate and the solvent; and the chain extenders comprise a carboxyl group-containing chain extender and a carboxyl group-free chain extender, wherein the mole of the carboxyl group-containing chain extender accounts for 20%-50% of the total mole of chain extenders. Compared with the prior art, when the two-component adhesive layer polyurethane resin for the synthetic leather is adhered, the low-temperature fast curing can be achieved and thus the energy consumption of the production is reduced and the turnover times and the utilization efficiency of a release paper are both improved.

Description

technical field [0001] The invention relates to a polyurethane resin and a preparation method thereof, in particular to a two-component adhesive layer polyurethane resin for synthetic leather and a preparation method thereof. Background technique [0002] Polyurethane synthetic leather is a composite material composed of polyurethane and fibers. In most cases, polyurethane synthetic leather consists of surface layer polyurethane resin film, bonding layer polyurethane resin film, polyurethane microporous layer and base cloth from top to bottom. Since the polyurethane resin of the adhesive layer is mainly responsible for the role of bonding the surface layer and the microporous layer, the polyurethane resin of the adhesive layer is very important in the entire synthetic leather production process. Commonly used adhesive layer polyurethane resins are one-component and two-component types. Because the two-component adhesive layer polyurethane resin overcomes the defects of the ...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/44C08G18/42C08G18/48C08G18/34C08G18/32C09J175/04C09J175/06C09J175/08
CPCC08G18/3206C08G18/348C08G18/4018C08G18/4202C08G18/4238C08G18/4854C08G18/6607C08G18/6625C08G18/664C08G18/6659C08G18/6674C08G18/6692C09J175/04C09J175/06C09J175/08
Inventor 杨银龙蒋红梅唐劲松蔡善来
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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