Polyurethane coating material for shoe coating and preparation method of polyurethane coating material

A polyurethane coating and coating technology, used in polyurea/polyurethane coatings, coatings, antifouling/underwater coatings, etc., can solve the problems of many bubbles and difficult to achieve high transparency, and achieve accelerated aging, reduced friction coefficient, The effect of reducing bubbles

Active Publication Date: 2019-05-17
FOSHAN NANHAI QIHONG SHOES MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a polyurethane coating for shoe coating and its preparation method, a

Method used

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  • Polyurethane coating material for shoe coating and preparation method of polyurethane coating material
  • Polyurethane coating material for shoe coating and preparation method of polyurethane coating material
  • Polyurethane coating material for shoe coating and preparation method of polyurethane coating material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] This embodiment relates to a method for preparing a polyurethane coating for shoe coating, which includes the following steps:

[0035] Step (1): Weigh 6 kg of isocyanate, 2.5 kg of polyester polyol with a molecular weight of 2000, 0.1 kg of carbodiimide (dewatering agent) and 1.4 kg of propylene carbonate (diluent), add them to the reactor, and stir. Uniform, react for 7 hours at 100°C, remove bubbles in vacuum (-0.095MPa), and cool to obtain component A with an NCO content of 10.4%;

[0036] Step (2): Weigh 7.0 kg of polyester polyol, 2.0 kg of 1,4'-butanediol (chain extender), 0.2 kg of dibutyltin dilaurate (catalyst) and glycerin of dehydrated potassium aluminum sulfate dodecahydrate Add 0.8kg of the solution to the reaction kettle, stir evenly, vacuum (-0.095MPa) for 3 hours to remove bubbles, and obtain component B;

[0037] Step (3): Add 8kg of component A to 10kg of component B, mix evenly, and remove air bubbles in a vacuum for 30s to obtain a polyu...

Example Embodiment

[0040] Example 2

[0041] This embodiment relates to a method for preparing a polyurethane coating for shoe coating, which includes the following steps:

[0042] Step (1): Weigh 7 kg of isocyanate, 2.0 kg of polyester polyol with a molecular weight of 2000, 0.5 kg of carbodiimide (dewatering agent) and 0.5 kg of propylene carbonate (diluent), add them to the reactor, and stir. Uniform, react at 90°C for 7 hours, remove bubbles in vacuum (-0.095MPa), and cool to obtain component A with 21.3% NCO content;

[0043] Step (2): Weigh 7.5kg of polyester polyol, 1.0kg of 1,4'-butanediol (chain extender), 0.3kg of dibutyltin dilaurate (catalyst) and glycerin of dehydrated potassium aluminum sulfate dodecahydrate Add 1.2kg of the solution to the reaction kettle, stir evenly, vacuum (-0.095MPa) for 2 hours to remove bubbles, and obtain component B;

[0044] Step (3): Add 8kg of component A to 10kg of component B, mix uniformly, and remove air bubbles in a vacuum for 30 seconds to obtain a polyu...

Example Embodiment

[0047] Example 3

[0048] This embodiment relates to a method for preparing a polyurethane coating for shoe coating, which includes the following steps:

[0049] Step (1): Weigh 6.5 kg of isocyanate, 2.2 kg of polyester polyol with a molecular weight of 2000, 0.3 kg of carbodiimide (dewatering agent) and 1.0 kg of propylene carbonate (diluent), and add them to the reactor. Stir uniformly, react at 80°C for 8 hours, remove bubbles in vacuum (-0.095MPa), and cool to obtain component A with an NCO content of 16.2%;

[0050] Step (2): Weigh 8.0 kg of polyester polyol, 0.9 kg of 1,4'-butanediol (chain extender), 0.1 kg of dibutyltin dilaurate (catalyst) and glycerin of dehydrated potassium aluminum sulfate dodecahydrate Add 1.0kg of the solution to the reactor, stir evenly, vacuum (-0.095MPa) for 3 hours to remove bubbles, and obtain component B;

[0051] Step (3): Add 8kg of component A to 10kg of component B, mix uniformly, and remove air bubbles in a vacuum for 30 seconds to obtain a p...

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Abstract

The invention provides a polyurethane coating material for shoe coating and a preparation method of the polyurethane coating material. The preparation method comprises the following steps that step (1) isocyanate, polyester polyol, a moisture scavenger and a diluent are added into a reaction kettle in proportion and mixed evenly, reaction is carried out for 6-8 hours under the condition of 80-120DEG C, vacuum bubble removal is carried out, and cooling is performed to obtain a component A; step (2) polyester polyol, a chain extender, a catalytic agent and a glycerin solution of dehydrated aluminum potassium sulfate dodecahydrate are added into the reaction kettle in proportion and mixed evenly and vacuumized for 2-3 hours to remove bubbles, and a component B is obtained; and step (3) the component A and the component B are evenly mixed in proportion, vacuum bubble removal is carried out for 30s, and the polyurethane coating material is obtained. The prepared polyurethane coating material is used for coating the surface of a shoe, once-forming can be achieved, and the problem that bubbles generated in the coating due to the fact that a known spraying polyurethane elastomer reacts with moisture is further solved.

Description

technical field [0001] The invention relates to a polyurethane coating and a preparation method thereof, in particular to a polyurethane coating for shoe coating and a preparation method thereof. Background technique [0002] Conventional footwear usually includes two main components: the upper and the sole structure. Usually, the sole and the upper are made separately. The sole is a dense and wear-resistant material with waterproof performance; the upper is made of leather or fabric. Breathability is guaranteed. However, in traditional shoes, if the height of the sole is too low, water will enter the shoe through the seams and the upper. Rain boots are shoes used in rainy days. The sole and upper of the rain boots are in one form, and the waterproof effect is very good, but The upper is too dense and loses breathability, which is not conducive to outdoor sports. Therefore, there is a need for a shoe upper coating, which can well cover the sole and part of the upper, while...

Claims

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Application Information

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IPC IPC(8): C09D175/06C09D5/14C09D5/16C08G18/66C08G18/42C08G18/32
Inventor 孙维忠陈誉萱孙新远
Owner FOSHAN NANHAI QIHONG SHOES MATERIAL CO LTD
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