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Solvent-free polyurethane resin for synthetic leather, preparation method thereof and application thereof in aqueous/solvent-free polyurethane synthetic leather

A solvent-free polyurethane and synthetic leather technology, used in textiles and papermaking, etc., can solve the problem of low water-based/solvent-free peel strength, and achieve the effect of enhancing production operation tolerance, soft hand feeling, and improving initial peel strength

Active Publication Date: 2019-07-30
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent document 105220519A discloses a method for manufacturing solvent-free synthetic leather based on UV curing technology. In this method, a water-based surface layer and a photo-cured solvent-free intermediate layer are combined to prepare a water-based / solvent-free synthetic leather. Although photo-curing technology is used to improve Coating properties, but still not addressing the current issue of low aqueous / solvent-free peel strength

Method used

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  • Solvent-free polyurethane resin for synthetic leather, preparation method thereof and application thereof in aqueous/solvent-free polyurethane synthetic leather
  • Solvent-free polyurethane resin for synthetic leather, preparation method thereof and application thereof in aqueous/solvent-free polyurethane synthetic leather

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Effect test

preparation example Construction

[0033] (3) Preparation of water-based / solvent-free synthetic leather:

[0034] Coat the KTC716 carboxylic acid water-based resin of Hefei Water-based Ketian Material Co., Ltd. on the release paper, and dry it at 130°C for 2 minutes to obtain the surface layer; cast component A and component B at a low pressure according to a certain mass ratio Fully mix in the machine to obtain solvent-free polyurethane resin, pour and coat on the water-based surface layer, then enter the 110°C oven for pre-reaction for 60 seconds, after the pre-reaction is completed, attach the base fabric, and then continue to react at 100-150°C for 7 minutes , to make it cross-linked and solidified; after curing and forming, the release paper is peeled off and rolled up to obtain high-stripping water-based / solvent-free synthetic leather.

[0035] Test the peel strength (that is, the initial peel strength), and the prepared water-based / solvent-free synthetic leather is aged at 70°C for 24 hours to test the p...

Embodiment 1

[0046] (1) Preparation of component A:

[0047] Dehydrate DP-4000 and PE-1320 at 90-110°C and -0.08MPa~-0.1MPa for 3-5h for later use; add 20 parts of DP-4000 and 80 parts of PE-1320 after dehydration into the reactor, Adjust and keep the temperature at 40-60°C, then add 1 part of 1,4-butanediol, 5 parts of trimethylolpropane, 0.1 part of water, 0.02 part of BiCAT 8124, 0.1 part of DC-193, and stir for 4-6 hours , to obtain component A.

[0048] (2) Preparation of component B:

[0049] Put 30 parts of MDI-100 into the reaction kettle and stir to mix evenly, then add 5 parts of dehydrated DP-4000, 40 parts of PE-1320, 0.1 part of dimethylol propionic acid, heat up to 70-80°C, and stir to react 4-6h, component B is obtained.

[0050] (3) Preparation of water-based / solvent-free synthetic leather:

[0051] Coat the KTC716 carboxylic acid water-based resin of Hefei Water-based Ketian Material Co., Ltd. on the release paper, and dry it at 130°C for 2 minutes to form a surface la...

Embodiment 2

[0054] (1) Preparation of component A:

[0055] Dehydrate DP-4000 and PE-1320 at 90-110°C and -0.08MPa~-0.1MPa for 3-5 hours for later use; add 40 parts of DP-4000 and 60 parts of PE-1320 after dehydration into the reactor, Adjust and keep the temperature at 40-60°C, then add 8 parts of 1,4-butanediol, 2 parts of trimethylolpropane, 0.5 parts of water, 0.4 parts of BiCAT 8124, 0.8 parts of DC-193, and stir for 4-6 hours , to obtain component A.

[0056] (2) Preparation of component B:

[0057] Put 40 parts of MDI-100 into the reaction kettle and stir to mix evenly, then add 20 parts of dehydrated DP-4000, 20 parts of PE-1320, 2 parts of dimethylol propionic acid, heat up to 70-80°C, and stir to react 4-6h, component B is obtained.

[0058] (3) Preparation of water-based / solvent-free synthetic leather:

[0059] Coat the KTC716 carboxylic acid water-based resin of Hefei Water-based Ketian Material Co., Ltd. on the release paper, and dry it at 130°C for 2 minutes to form a su...

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Abstract

The invention provides a solvent-free polyurethane resin for synthetic leather, a preparation method thereof and an application thereof in aqueous / solvent-free polyurethane synthetic leather. The invention provides the solvent-free polyurethane resin for the synthetic leather, which is prepared by mixing and reacting a component A and a component B according to a mass ratio of 1:2-2:1; wherein thecomponent A comprises polyhydric alcohol, a small molecular chain extender, a cross-linking agent, water, a catalyst and a foam stabilizer; the component B comprises polyhydric alcohol, isocyanate and dimethylolpropionic acid. The solvent-free polyurethane resin for the synthetic leather does not contain any organic solvent, has low energy consumption and high production efficiency, and when thesolvent-free polyurethane resin is used for aqueous / solvent-free polyurethane synthetic leather, the obtained aqueous / solvent-free polyurethane synthetic leather product is environment-friendly, softand plump in hand feeling and high in peeling strength.

Description

technical field [0001] The invention belongs to the field of polyurethane preparation, and in particular relates to a solvent-free polyurethane resin for synthetic leather, a preparation method thereof and an application in water-based / solvent-free polyurethane synthetic leather. Background technique [0002] Solvent-free polyurethane occupies an important position in the material industry due to its characteristics of no solvent pollution and excellent comprehensive performance, and is widely used in the field of synthetic leather. In recent years, the development of water-based synthetic leather and solvent-free synthetic leather has advanced by leaps and bounds, and a series of major advances have been made in technology research and development and production processes, bringing new opportunities for the transformation and upgrading of the synthetic leather industry. Among them, the development of water-based / solvent-free synthetic leather is even more eye-catching. Wate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/32C08G18/34C08G18/42C08G18/48C08G18/66C08G18/76D06N3/14C08G101/00
CPCC08G18/0823C08G18/3206C08G18/348C08G18/4018C08G18/4238C08G18/425C08G18/48C08G18/6611C08G18/7671C08G2110/0083D06N3/14D06N2209/1664D06N2209/1692D06N2211/28
Inventor 戴家兵杜春毅王稳冯林林李维虎朱保凌
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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