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A kind of ultra-low gloss self-dulling waterborne polyurethane resin and its preparation method and application

A water-based polyurethane and gloss technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of inconvenient use, complicated preparation process, inability to achieve matte, etc., achieve good stability, uniform coating, and achieve surface low gloss effect

Active Publication Date: 2020-02-28
广州百思创科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN103740250A discloses a method for preparing a self-dulling water-based polyurethane coating agent for leather. It is formed by mixing component A with more branched micelles with a larger particle size and component B with a small particle size. The preparation process is complicated and inconvenient to use.
Chinese patent CN104974324A prepares a reaction self-dulling water-based polyurethane resin by controllably producing particles with a certain particle size distribution during the synthesis process, but the minimum value of the 60° gloss in the examples is 8, which cannot achieve complete non-lustering. Light

Method used

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  • A kind of ultra-low gloss self-dulling waterborne polyurethane resin and its preparation method and application
  • A kind of ultra-low gloss self-dulling waterborne polyurethane resin and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0069] 1. Proportion of ultra-low gloss self-dulling water-based polyurethane resin:

[0070] (a) R=1.5; (b) dimethylol butyric acid accounts for the massfraction of prepolymer is 3.3%; (c) degree of neutralization is 120%; (d) trimethylolpropane accounts for prepolymer The mass fraction is 1%; (e) dibutyltin dilaurate accounts for 0.17% of the mass fraction of the prepolymer; (f) sodium ethylenediamine ethanesulfonate accounts for 1% of the mass fraction of the prepolymer; (g) hydrazine hydrate Reactive group (the reactive group is the NH in the small molecule chain extender 2 group, hydrazine hydrate has two NH 2 The molar ratio of the group) to the theoretical remaining NCO is 1; (h) the solid content of the resin is 30%.

[0071] 2. Preparation method of ultra-low gloss self-dulling waterborne polyurethane resin:

[0072] (1) 50g polytetrahydrofuran ether glycol (molecular weight is 1000), 2.37g dimethylol butyric acid (dissolved with 5g DMF in advance), 0.72g trimethyl...

Embodiment 2

[0076] 1. Proportion of ultra-low gloss self-dulling water-based polyurethane resin:

[0077] (a) R=1.9; (b) dimethylol butyric acid accounts for the massfraction of prepolymer is 3.6%; (c) degree of neutralization is 120%; (d) trimethylol propane accounts for prepolymer The mass fraction is 2%; (e) dibutyltin dilaurate accounts for 0.17% of the mass fraction of the prepolymer; (f) sodium ethylenediamine ethanesulfonate accounts for 0.5% of the mass fraction of the prepolymer; (g) Amine reactive group (the reactive group is the NH in the small molecule chain extender 2 group, ethylenediamine has two NH 2 group) and the theoretical residual NCO molar ratio is 1; (h) the solid content of the resin is 30%;

[0078] 2. Preparation method of ultra-low gloss self-dulling waterborne polyurethane resin:

[0079] (1) 50g polytetrahydrofuran ether glycol (molecular weight is 1000), 2.99g dimethylol butyric acid (dissolved with 5g DMF in advance), 1.66g trimethylolpropane and 0.14g di...

Embodiment 3

[0083] 1. Proportion of ultra-low gloss self-dulling water-based polyurethane resin:

[0084] (a) R=2.1; (b) dimethylol propionic acid accounts for the massfraction of prepolymer is 2.7%; (c) degree of neutralization is 100%; (d) trimethylolpropane accounts for prepolymer The mass fraction is 1.5%; (e) organic bismuth catalyst accounts for 0.2% of the mass fraction of prepolymer; (f) sodium ethylenediamine ethanesulfonate accounts for 0.5% of the mass fraction of prepolymer; (g) hydrazine hydrate reactivity The molar ratio of the group equivalent to the theoretical residual NCO is 0.8; (h) the solid content of the resin is 30%;

[0085] 2. Preparation method of ultra-low gloss self-dulling waterborne polyurethane resin:

[0086] (1) 50g polyethylene adipate polyol (molecular weight: 1000), 2.54g dimethylolpropionic acid (dissolved with 5g DMF in advance), 1.41g trimethylolpropane and 0.19g organic bismuth catalyst Add them to the reaction container respectively, add 39.57g o...

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Abstract

The invention discloses ultralow-glossiness self-extinction waterborne polyurethane resin and a preparation method and application thereof. The ultralow-glossiness self-extinction waterborne polyurethane resin is prepared from the following components: S1, at least one aliphatic diisocyanate; S2, at least one oligomer polyol; S3, at least one trihydric alcohol compound; S4, at least one carboxylic hydrophilic chain extender; S5, at least one catalyst; S6, at least one neutralizer; S7, at least one amine sulfonate hydrophilic chain extender; S8, at least one micro-molecule chain extender. The ultralow-glossiness self-extinction waterborne polyurethane resin has the solid content of 20-40% and the average particle size of 600-4,000 nm, does not require the adding of a flatting agent and is simple in preparation process, convenient to use, low in surface glossiness, uniform in coating and good in stability.

Description

technical field [0001] The invention belongs to the field of environment-friendly polyurethane coatings, in particular to an ultra-low gloss self-dulling water-based polyurethane resin and its preparation method and application. Background technique [0002] With the change of people's aesthetic concept, matting coating is widely used in the surface finishing process of leather, fabric and paper due to its natural coating appearance, good visual effect and excellent hand feeling. So far, adding matting agent directly to the coating is the most widely used method, but due to the incompatibility between the matting agent and the resin, the matting agent is easy to agglomerate in the system, resulting in poor stability of the coating and uneven surface gloss. Inorganic matting agents (such as silica) have excellent matting effects, but the disadvantages are high brittleness of the coating film, poor wear resistance, and low bonding strength. [0003] Self-matting water-based p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/32C08G18/34C08G18/73C08G18/12C08G18/66C08G18/42C08G18/75C09D175/06C09D175/08
CPCC08G18/0823C08G18/0828C08G18/12C08G18/3206C08G18/348C08G18/4238C08G18/4854C08G18/6659C08G18/6692C08G18/73C08G18/755C09D175/06C09D175/08C08G18/3228C08G18/3231
Inventor 苏佳佳朱亚明
Owner 广州百思创科技有限公司