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Dry type polyurethane resin for cold pressing and preparation method thereof

A polyurethane resin, dry-type technology, applied in the field of dry-type polyurethane resin for cold pressing and its preparation, can solve the problems of low production efficiency, synthetic leather feel, large changes in leather surface gloss, etc., and achieve high production efficiency and leather surface gloss. The effect of small changes and full embossing pattern

Active Publication Date: 2013-12-25
HEFEI ANLI POLYURETHANE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional embossing process is hot pressing, which is more natural than the transfer pattern of release paper, and the pattern is close to the pattern of genuine leather, but the disadvantage is that the production efficiency is low, and the synthetic leather feels and the gloss of the leather surface changes greatly after embossing

Method used

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  • Dry type polyurethane resin for cold pressing and preparation method thereof
  • Dry type polyurethane resin for cold pressing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1. Raw materials and ratio

[0038] Raw materials

Weight (unit Kg)

PET-1

200

PET-2

700

1,4-butanediol

20

MDI

160

Antioxidants

30

Terminator methanol

0.8

UV absorber UV-328

1.0

Organic Bismuth Catalyst MB20

0.5

Solvent DMF

2600

[0039] Among the raw materials, PET-1 is a polyester polyol with a molecular weight of 3000. The raw materials and formula used are 4000Kg of adipic acid, 1300Kg of ethylene glycol, 900Kg of 1,4-butanediol, and catalyst TPT0.5Kg. It is produced by Anhui Anli Synthetic Leather Co., Ltd. The company produces according to the conventional method, the product model is SP-301.

[0040] Among the raw materials, PET-2 is a polyester polyol with a molecular weight of 2000. The raw materials and formula used are 3000Kg of adipic acid, 200Kg of ethylene glycol, 1800Kg of 1,4-butanediol, and 0.4Kg of catalyst TPT. It is produced by Anhui Anli Synthetic Leather Co., Ltd. The company produces according to conventional methods, product mod...

Embodiment 2

[0047] 1. Raw materials and ratio

[0048] Raw materials

Weight (unit Kg)

[0049] PET-1

200

PET-2

700

Ethylene glycol

15

MDI

160

Antioxidants

20

Terminator phosphoric acid

0.03

UV absorber UV-328

1.0

Organic Bismuth Catalyst MB20

0.2

Solvent DMF

2600

[0050] Among the raw materials, PET-1 is a polyester polyol with a molecular weight of 3000. The raw materials and formula used are 4000Kg of adipic acid, 1300Kg of ethylene glycol, 900Kg of 1,4-butanediol, and catalyst TPT0.5Kg. It is produced by Anhui Anli Synthetic Leather Co., Ltd. The company produces according to conventional methods, product model SP-3013.

[0051] Among the raw materials, PET-2 is a polyester polyol with a molecular weight of 2000. The raw materials and formula used are 3000Kg of adipic acid, 200Kg of ethylene glycol, 1800Kg of 1,4-butanediol, and 0.4Kg of catalyst TPT. It is produced by Anhui Anli Synthetic Leather Co., Ltd. The company produces according to conventional methods,...

Embodiment 3

[0057] In order to verify the excellent embossing performance of the dry polyurethane resin for cold pressing of the present invention, the polyurethane resin prepared in Example 1 was formed into leather according to the following formula and a conventional dry veneer process and embossed by a cold pressing process. The specific formula is as follows:

[0058]

[0059]

[0060] After testing, the dry polyurethane synthetic leather made with the above formula, under the conventional cold embossing process conditions, the pattern after embossing is full and natural, the hand feeling before and after embossing, the leather surface gloss change is small, the embossing speed is fast, and the efficiency is high.

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Abstract

The invention discloses a dry type polyurethane resin for cold pressing and a preparation method thereof. The dry type polyurethane resin for cold pressing comprises the raw materials including diisocyanate, a polyol compound, a small molecular dihydric alcohol chain extender, a catalyst, an antioxidant, auxiliaries and a terminator. In the process of synthesizing the polyurethane resin, the rigid polyol compound and small molecular dihydric alcohol are selected, so that the rigidity of the resin can be improved, and the patterns can be well molded after the resin is embossed, and the patterns are prevented from rebounding; the antioxidant is added into the resin, so that the resin is protected from oxygenolysis when the resin is made into leather and embossed, and the patterns are full and natural after the resin is embossed, and the hand feel and the leather brightness are little changed before and after the resin is embossed.

Description

1. Technical Field [0001] The invention relates to a functional polyurethane resin, in particular to a dry polyurethane resin for cold pressing and a preparation method thereof, which can be used for sofa leather, shoe leather, luggage leather and the like. 2. Background technology [0002] The ever-changing and colorful patterns on the surface of synthetic leather are generally obtained in two ways. One is to transfer the pattern on the release paper, and the other is to obtain it by embossing. The traditional embossing process is hot pressing. Compared with the release paper, the hot pressing process transfers the pattern naturally, and the pattern is close to the pattern of real leather, but the disadvantage is that the production efficiency is low, and the synthetic leather feel and the gloss of the leather surface change greatly after embossing. The cold pressing process is a new synthetic leather post-processing embossing method that has only appeared in recent years. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/32C08K5/524C08K5/526C08K5/134C08K5/372D06M15/572D06M15/568
Inventor 宗军业惠坚强王海峰李李
Owner HEFEI ANLI POLYURETHANE NEW MATERIAL
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