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Folding-resistant and high-transparency mirror surface polyurethane resin, and preparation method and application thereof

A polyurethane resin, translucent technology, applied in the field of polyurethane resin, can solve the problems of poor folding resistance, poor folding resistance, easy migration, etc., and achieve excellent abnormal low temperature folding resistance, good surface smoothness, adhesive film The effect of high light transmittance

Active Publication Date: 2018-06-08
SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application of mirror leather is mainly in the direction of shoes. Ordinary mirror shoe leather has poor folding resistance due to high resin modulus and strong crystallinity, which seriously affects the service life of shoe leather.
In addition, in order to pursue a good feel, silicone is usually added to achieve different performance and feel requirements, but ordinary silicone is easy to migrate to the surface of the surface layer and cause fogging
Since the fogging phenomenon cannot be detected in a short period of time, after a period of accumulation, a layer of organic silicon accumulation layer will appear on the leather surface, which will affect the appearance and use, resulting in a large amount of waste of finished leather, which is a great waste for tanneries and resin factories. bring huge losses
[0004] At present, there are many mirror resins on the market, but most of them are difficult to meet the requirements of leather due to poor folding resistance and easy fogging on the surface.

Method used

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  • Folding-resistant and high-transparency mirror surface polyurethane resin, and preparation method and application thereof
  • Folding-resistant and high-transparency mirror surface polyurethane resin, and preparation method and application thereof
  • Folding-resistant and high-transparency mirror surface polyurethane resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The polyester diol used in this embodiment is polyadipate glutarate 1,4-butylene glycol ester diol (A) and polyadipate 1,4-butylene glycol ester diol (B) , the mol ratio of adipic acid and glutaric acid in (first) is 3:7, and number average molecular weight is 2000; The number average molecular weight of (second) is 2000; Wherein (first): (second)=3:1 (weight Compare);

[0060] The single-end amino silicone oil used in this example has a molecular weight of 800.

[0061] Sample B1 is prepared in this embodiment, wherein the raw materials and weight of sample B1 are as follows:

[0062] raw material name

weight / g)

percentage(%)

Antioxidant BHT

1.00

0.02％

Polyester Diol (A)

441

11％

Polyester diol (B)

147

3.7％

1,4-Butanediol

142.5

3.6％

4,4'-Diphenylmethane diisocyanate

469.3

11.7％

dimethylformamide

2400

59.9％

butanone

400

10％

Single-ended amino silicone oil...

Embodiment 2

[0070] The polyester diol used in this embodiment is polyadipate glutarate 1,4-butylene glycol ester diol (A) and polyadipate 1,4-butylene glycol ester diol (B) , the mol ratio of adipic acid and glutaric acid in (first) is 1:1, and number average molecular weight is 3500; The number average molecular weight of (second) is 2000; Wherein (first): (second)=3:2 (weight Compare);

[0071] The single-end amino silicone oil used in this example has a molecular weight of 1000.

[0072] Sample B2 is prepared in this embodiment, wherein the raw materials and weight of sample B2 are as follows:

[0073] raw material name

weight / g)

percentage(%)

Antioxidant BHT

1.00

0.02％

Polyester Diol (A)

338.4

8.4％

Polyester diol (B)

225.6

5.6％

1,4-Butanediol

154

3.8％

4,4'-Diphenylmethane diisocyanate

484.2

12.1％

dimethylformamide

2400

59.9％

butanone

400

10％

Single-ended amino silicone...

Embodiment 3

[0081] The polyester diol used in this embodiment is polyadipate glutarate 1,4-butylene glycol ester diol (A) and polyadipate 1,4-butylene glycol ester diol (B) , the mol ratio of adipic acid and glutaric acid in (A) is 7:3, and the number average molecular weight is 1000; The number average molecular weight of (B) is 2000; Wherein (A): (B)=1:1 (weight Compare);

[0082] The single-end amino silicone oil used in this example has a molecular weight of 1000.

[0083] Sample B3 is prepared in the present embodiment, wherein the raw materials and weight of sample B3 are as follows:

[0084]

[0085]

[0086] The preparation steps of sample B3 are as follows:

[0087] 1), antioxidant BHT, polyester diol (A), polyester diol (B), 1,4-butanediol, dimethylformamide (55% of the total weight) are mixed at 60°C Uniform;

[0088] 2), then add 4,4'-diphenylmethane diisocyanate (95% of the total weight), heat up to 80°C, and keep warm for 4 hours;

[0089] 3), add the 4,4'-dipheny...

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Abstract

The invention discloses folding-resistant and high-transparency mirror surface polyurethane resin, and a preparation method and an application thereof. The folding-resistant and high-transparency mirror surface polyurethane resin is prepared from the following components by the weight percentage: 6-25% of polyester glycol, 2-5% of a chain extender, 10-15% of diisocyanate, 0.02-0.05% of an antioxidant, 0.05-0.25% of an end-capping reagent, and the balance a solvent, wherein the polyester glycol is selected from one or more of poly-1,4-butylene adipate glycol, poly(1,6-hexamethylene adipate) glycol, poly(neopentyl glycol adipate) glycol, polypentylene-butylene adipate glycol or polypentylene-hexamethylene adipate glycol. The folding-resistant and high-transparency mirror surface polyurethaneresin can be used for preparing vamp. The prepared mirror polyurethane resin has excellent constant and low temperature folding resistance and high transmittance of a glue film, and a leather samplehas good surface smoothness and is not easy to precipitate.

Description

technical field [0001] The present invention relates to a polyurethane resin. Background technique [0002] Polyurethane synthetic leather is a composite material composed of a polyurethane coating and a substrate. Generally, the polyurethane coating is divided into a surface layer and an adhesive layer. The function of the adhesive layer polyurethane resin is to bond the surface layer and the substrate together. The surface layer is mainly responsible for reflecting the appearance and style of synthetic leather and protecting the synthetic leather. Therefore, the surface layer plays a vital role in the quality of the entire synthetic leather, especially in the field of the mirror surface layer, which is hand-feeling and physical properties. Higher requirements have also been raised. [0003] The application of mirror leather is mainly in the direction of shoes. Ordinary mirror shoe leather has poor folding resistance due to high resin modulus and strong crystallinity, whic...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/28C08G18/32C08G18/42C08G18/61D06N3/00D06N3/14A43B23/02
CPCA43B23/0215C08G18/282C08G18/289C08G18/3206C08G18/4202C08G18/4238C08G18/664D06N3/0004D06N3/0061D06N3/0097D06N3/146D06N3/147D06N2209/0838D06N2209/0861D06N2209/103D06N2211/106D06N2211/28
Inventor 王传勇蒋红梅胡海波顾佳佳唐劲松
Owner SHANGHAI HUAFON NEW MATERIAL R&D TECH CO LTD
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