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A kind of two-component adhesive layer polyurethane resin for bronzing and its preparation method

A polyurethane resin and adhesive layer technology, which is applied in the field of two-component adhesive layer polyurethane resin for bronzing and its preparation, can solve the problems of difficult operation of the production process, system agglomeration or adhesion, etc., to achieve excellent product performance and overcome system agglomeration. or glue, the effect of improving the strength after curing

Active Publication Date: 2022-02-11
ZHEJIANG HUAFON SYNTHETIC RESIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In solvent-based polyurethane resin systems, chain extenders with four or more functional groups often lead to agglomeration or stickiness of the system, making it difficult to operate in the production process

Method used

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  • A kind of two-component adhesive layer polyurethane resin for bronzing and its preparation method
  • A kind of two-component adhesive layer polyurethane resin for bronzing and its preparation method
  • A kind of two-component adhesive layer polyurethane resin for bronzing and its preparation method

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Experimental program
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Effect test

preparation example Construction

[0038] A kind of preparation method of bronzing of the present invention uses two-component adhesive layer polyurethane resin, comprises the steps:

[0039] (1) Polyester polyol A, polyester polyol B, self-made polyfunctionality chain extender, trimethylolpropane, small molecule chain extender, antioxidant, catalyst, 55-80% of butane Put the ketone into a container with a temperature control and stirring device, keep the temperature at 50-60°C, and stir for 30-50 minutes;

[0040] (2) Add diisocyanate, heat up to 70-80°C, react for 100-150min, when the viscosity reaches 100-160Pa·s / 70°C, add the remaining butanone, add terminator, stir until no diisocyanate remains , and continue to stir for 60-90 minutes to obtain the two-component adhesive layer polyurethane resin for bronzing, with a viscosity of 100-160 Pa·s / 25°C.

Embodiment 1

[0043] A two-component adhesive layer polyurethane resin for bronzing, consisting of the following components in percentage by weight:

[0044]

[0045] The preparation method of described hot stamping with two-component adhesive layer polyurethane resin comprises the steps:

[0046] (1) Put polyester polyol A, polyester polyol B, self-made polyfunctionality chain extender, trimethylolpropane, small molecule chain extender, antioxidant, catalyst, 70% butanone into the recipe In a container with a temperature control and stirring device, keep the temperature at 60°C and stir for 30 minutes;

[0047](2) Add diisocyanate, heat up to 75°C, react for 120min, when the viscosity reaches 140Pa·s / 70°C, add the remaining butanone, add 1,3-butanediol, stir until no diisocyanate remains, Stirring was continued for 70 minutes to obtain the two-component adhesive layer polyurethane resin for bronzing with a viscosity of 120 Pa·s / 25°C.

Embodiment 2

[0049] A two-component adhesive layer polyurethane resin for bronzing, consisting of the following components in percentage by weight:

[0050]

[0051]

[0052] The preparation method of described hot stamping with two-component adhesive layer polyurethane resin comprises the steps:

[0053] (1) Put polyester polyol A, polyester polyol B, self-made polyfunctionality chain extender, trimethylolpropane, small molecule chain extender, antioxidant, catalyst, 60% butanone in formula amount into In a container with a temperature control and stirring device, keep the temperature at 60°C and stir for 30 minutes;

[0054] (2) Add diisocyanate, heat up to 75°C, react for 120min, when the viscosity reaches 150Pa·s / 70°C, add the remaining butanone, add 1,3-butanediol, stir until no diisocyanate remains, Stirring was continued for 80 minutes to obtain the two-component adhesive layer polyurethane resin for bronzing with a viscosity of 135 Pa·s / 25°C.

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Abstract

The present invention is a two-component adhesive layer polyurethane resin for bronzing and its preparation method. The polyurethane resin of the present invention is required to be soluble in a high-volatility solvent system, while ordinary polyester diols are easy to crystallize in a high-volatility solvent system and are difficult to preserve Therefore, the modified polyester diol with slightly lower crystallinity is selected to ensure the strength of the polyurethane resin, and the self-made multifunctional chain extender is used to improve the low-temperature curing speed and the strength after curing. The functional chain extender is easy to cause the defect of agglomeration or stickiness of the system, and the product has excellent performance. The present invention uses an all-weak solvent system, and has high adhesion. The bronzing film using the product of the present invention has good surface brightness, clear lines, and a stiff hand feeling. The overall performance of the hot stamping composite product, such as water resistance, is better than that of the existing products.

Description

technical field [0001] The invention relates to a two-component adhesive layer polyurethane resin for bronzing and a preparation method thereof, belonging to the technical field of adhesive layer polyurethane resin materials. Background technique [0002] In addition to the wide application of polyurethane resin in synthetic leather, the bonding performance of polyurethane resin also has a large application market in the textile field. In the bronzing (cloth film) fabric processing market, it is necessary to use a middle layer medium for bonding the base material and the fabric, that is, a polyurethane resin commonly known as a binder. The existing two-component adhesive layer polyurethane resins for bronzing basically contain a certain amount of strong solvent dimethylformamide to improve the compatibility of the resin. However, the boiling point of dimethylformamide is as high as 152°C. It is difficult to volatilize during the hot stamping process, resulting in defects su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/32C09J175/06C09J11/06
CPCC08G18/6644C08G18/4202C08G18/4241C08G18/425C08G18/3206C09J175/06C09J11/06C08K5/1345
Inventor 杜飘扬张初银吴震方飞韩飞龙岑小春
Owner ZHEJIANG HUAFON SYNTHETIC RESIN
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