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Aqueous dispersion of polyurethane or polyurethaneurea and preparation method thereof, water-based space leather bass and preparation method thereof

A polyurethane urea and dispersion technology, applied in the field of space leather, can solve the problems of uneven distribution, no coupling agent, and low urea group content, and achieve the effects of excellent flexural resistance, improved peel strength, and enhanced strength.

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Patent document CN 106947048 A discloses a method for preparing water-based polyurethane used for preparing water-based garment leather bases, using large molecular weight polyether polyols and introducing large molecular weight polyether amines through post-chain extension for post-chain extension. This method results in less urea group content and uneven distribution in the molecular chain of the product, and does not add a coupling agent for modification to improve performance; therefore, although the obtained garment leather is soft to the touch and has a good resin flocculation effect, it can only Used to prepare garment leather bases with lower peel strength requirements
[0007] Patent document CN 105566608 B discloses a water-based polyurethane emulsion used for soaking basses in sofa leather, which is modified by adding a silane coupling agent, but it is a post-reaction coupling agent, which exists at the end of the product molecular segment, and there will be There is no coupling agent problem in the long molecular chain segment, and the performance of the product is limited

Method used

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  • Aqueous dispersion of polyurethane or polyurethaneurea and preparation method thereof, water-based space leather bass and preparation method thereof
  • Aqueous dispersion of polyurethane or polyurethaneurea and preparation method thereof, water-based space leather bass and preparation method thereof
  • Aqueous dispersion of polyurethane or polyurethaneurea and preparation method thereof, water-based space leather bass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Preparation of Aqueous Dispersions of Polyurethanes or Polyurethaneureas:

[0112] 1) 190g of polytetrahydrofuran ether polyol, 83g of 4,4'-dicyclohexylmethane diisocyanate, 3.5g of DMPA, 2g of Ymer N-120, 0.03g of bismuth neodecanoate and 27.75g of acetone were added Mixed in a four-necked round-bottomed flask with a volume of 1 L equipped with a nitrogen inlet and outlet, and reacted at 60-90° C. until the reaction mixture had reached or was slightly lower than the theoretical isocyanate content of 5.2% to obtain a prepolymerized isocyanate-terminated ester. thing I;

[0113] 2) Cool the system containing the obtained isocyanate-terminated prepolymer I to 45-50° C., add 9g of [4-(aminomethyl)cyclohexyl]methanol, 5g of 1,11-bis(trimethoxysilyl) )-4-oxo-8-azaundecan-6-ol and 42.36g of acetone were mixed uniformly, and the chain extension reaction was carried out at 60-80°C until the reaction mixture had reached or was slightly lower than the theoretical isocyanate cont...

Embodiment 2

[0120] Preparation of Aqueous Dispersions of Polyurethanes or Polyurethaneureas:

[0121]1) 262g of polytetrahydrofuran ether polyol, 143g of 4,4'-dicyclohexylmethane diisocyanate, 6.5g of DMPA, 4g of Ymer N-120, 0.1g of bismuth neodecanoate and 42.25g of acetone were added Mixed in a four-necked round-bottomed flask with a volume of 1 L equipped with a nitrogen inlet and outlet, and reacted at 60-90° C. until the reaction mixture had reached or was slightly lower than the theoretical isocyanate content of 6.61% to obtain a prepolymerized isocyanate-terminated ester. thing I;

[0122] 2) The system containing the obtained isocyanate-terminated prepolymer I was cooled to 45-50° C., and 20 g of [4-(aminomethyl)cyclohexyl]methanol and 10 g of 1,11-bis(trimethoxysilyl) were added. )-4-oxo-8-azaundecan-6-ol and 65.03g of acetone were mixed uniformly, and the chain extension reaction was carried out at 60-80°C until the reaction mixture had reached or was slightly lower than the th...

Embodiment 3

[0129] Preparation of Aqueous Dispersions of Polyurethanes or Polyurethaneureas:

[0130] 1) 252g of polytetrahydrofuran ether polyol, 125.6g of 4,4'-dicyclohexylmethane diisocyanate, 5g of DMPA, 4g of Ymer N-120, 0.03g of bismuth neodecanoate and 39.4g of acetone were added Mixed in a four-necked round-bottomed flask with a volume of 1 L equipped with a nitrogen inlet and outlet, and reacted at 60-90° C. until the reaction mixture had reached or was slightly lower than the theoretical isocyanate content of 6.12% to obtain a prepolymerized isocyanate-terminated ester. thing I;

[0131] 2) Cool the system containing the obtained isocyanate-terminated prepolymer I to 45-50° C., add 16g of [4-(aminomethyl)cyclohexyl]methanol, 8g of 1,11-bis(trimethoxysilyl) )-4-oxo-8-azaundecan-6-ol and 60.6g of acetone were mixed uniformly, and the chain extension reaction was carried out at 60-80°C until the reaction mixture had reached or was slightly lower than the theoretical isocyanate con...

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Abstract

The invention belongs to the technical field of space leather, and in particular relates to an aqueous dispersion of polyurethane or polyurethane urea and a preparation method thereof, an aqueous space leather and a preparation method thereof, wherein the polyurethane or polyurethane polyurea contained in the aqueous dispersion comprises The following components are obtained: a) diols and / or polyols, b) diisocyanates and / or polyisocyanates, c) hydrophilic groups containing ionic and / or potentially ionic groups and containing 2 to 3 NCO-reactive functional groups Compounds, d) non-ionic hydrophilic compounds, e) isocyanate-reactive cyclic compounds containing hydroxyl and amino functional groups, f) silane coupling agents containing hydroxyl and amino functional groups, g) neutralizing agents, h ) small molecule compounds containing amino groups. The water dispersion obtained by the invention has fast flocculation speed and good effect, and has good storage stability at the same time; the obtained space leather has high peeling strength, and is excellent in normal and low temperature flexural resistance and chemical resistance.

Description

technical field [0001] The invention belongs to the technical field of space leather bass, and particularly relates to an aqueous dispersion of polyurethane or polyurethane urea and a preparation method thereof, an aqueous space leather bass and a preparation method thereof. Background technique [0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as its substitute material. Synthetic leather occupies a very important position in human daily life and is widely used in the production of luggage, clothing, footwear and car accessories. [0003] Space leather is a synthetic leather product developed in recent years. It is mainly a product made of non-woven fabric coated with a layer of slurry. It is characterized by the ability to greatly preserve the breathability and moisture permeability of the leather itself. , and this is also the performance that ordinary synthetic leather does not have. [0004]...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/66C08G18/48C08G18/34C08G18/12C08G18/32D06N3/00D06N3/14
CPCC08G18/758C08G18/6692C08G18/4854C08G18/348C08G18/12D06N3/146D06N3/147D06N3/005D06N3/0011D06N3/0077D06N2209/1664D06N2211/28C08G18/3271C08G18/3893C08G18/3234
Inventor 朱文辉王震孙小鹏邢庆达韩克晋云全纪学顺
Owner WANHUA CHEM GRP CO LTD
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