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Self-dulling polyurethane resin and preparation method thereof

A polyurethane resin and self-extinction technology, which is applied in polyurea/polyurethane coatings, animal husbandry, chemical treatment of small raw hides/large raw hides/leather skins/furs, etc., can solve the problems of production personnel injury, unsightly appearance, dust pollution, etc. Achieve the effects of easy operation, simple process and improved solvent resistance

Active Publication Date: 2017-04-26
SHANDONG TIANQING TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the popular matt leathers on the market use physical matting, and the leather finished with physical matting is gray in color and unsightly.
The matting agent used in physical matting produces a large amount of dust pollution during the production process, causing great physical harm to production personnel
Chinese patent CN103725178A discloses a method for synthesizing polyurethane matting varnish, in which powders with extremely small particle sizes such as silicone matting powder and wax powder are added, and a large amount of inhalable particulate matter is produced during the synthesis process, which causes damage to production personnel. greatly endangered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] formula:

[0026] 100kg of polytetrahydrofuran ether glycol with a molecular weight of 1000 and a hydroxyl value of 56.6KOHmg / g, H 12 MDI70kg, 1.6-hexanediol 4kg, dimethylolpropionic acid 8kg, trimethylolpropane 2kg, hydroxyethyl methacrylate 2kg, acetone 100kg, bismuth neodecanoate 0.02kg, ethylenediamine 5.5kg, ionized water 600kg.

[0027] Process:

[0028] 1. Polymerization reaction: Under the condition of anhydrous and oxygen-free, polytetrahydrofuran ether glycol, H 12 MDI is added in the reaction vessel, under mechanical stirring, the temperature is 85 ℃, react for 2 hours, add 1.6-hexanediol, dimethylolpropionic acid, trimethylolpropane, bismuth neodecanoate to the reaction vessel, in Under mechanical stirring, react at a temperature of 80° C. for 3 hours, and then add acrylic acid grafted substances to block. Add 15kg of acetone every 1h, and when the content of isocyanate groups in the polymer produced by the reaction remains unchanged, the reaction ends. ...

Embodiment 2

[0032] formula:

[0033] Polytetrahydrofuran ether glycol with a molecular weight of 650 and a hydroxyl value of 56.0KOHmg / g 110kg, H12MDI 80kg, 1.6-hexanediol 5kg, dimethylolpropionic acid 9kg, trimethylolpropane 3kg, hydroxypropyl methacrylate 3kg, acetone 120kg, bismuth neodecanoate 0.03kg, ethylenediamine 7kg, ionized water 650kg.

[0034] Process:

[0035] 1. Polymerization reaction: under the condition of anhydrous and oxygen-free, vacuum dehydrated polytetrahydrofuran ether diol with a molecular weight of 650 and a hydroxyl value of 56.6KOHmg / g, and H12MDI were added to the reaction vessel in sequence, and the temperature was 90°C under mechanical stirring. , reacted for 2 hours, added 1.6-hexanediol, dimethylolpropionic acid, trimethylolpropane, and bismuth neodecanoate into the reaction vessel, and reacted for 3.5 hours at a temperature of 75°C under mechanical stirring, and then added acrylic acid The branches are capped, and 10kg of acetone is added every 0.5h to ...

Embodiment 3

[0039] formula:

[0040] Polytetrahydrofuran ether glycol with a molecular weight of 1000 and a hydroxyl value of 57.0KOHmg / g 120kg, H12MDI 90kg, 1.6-hexanediol 6kg, dimethylolpropionic acid 10kg, trimethylolpropane 4kg, hydroxypropyl methacrylate 4kg, Acetone 125kg, bismuth neodecanoate 0.05kg, triethylamine 7kg, ionized water 700kg.

[0041] Process:

[0042] 1. Polymerization reaction: under the condition of anhydrous and oxygen-free, vacuum dehydrated polytetrahydrofuran ether glycol with a molecular weight of 1000 and a hydroxyl value of 56.6KOHmg / g, and H12MDI were added to the reaction vessel in sequence, and the temperature was 90°C under mechanical stirring. , reacted for 2 hours, added 1.6-hexanediol, dimethylolpropionic acid, trimethylolpropane, and bismuth neodecanoate into the reaction vessel, and reacted at 70°C for 4 hours under mechanical stirring, then added acrylic acid The branches are capped, and 12kg of acetone is added every 1h to control the viscosity....

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PUM

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Abstract

The invention provides a self-extinction polyurethane resin and a preparation method thereof. The resin is mainly prepared from raw materials such as polyether polyol, isocyanate, dihydric alcohol, crylic acid grafting substances, a hydrophilic chain extender, a cross-linking agent and 5-7 parts of an amino chain extender. According to the self-extinction polyurethane resin provided by the invention, as the crylic acid grafting substances which can absorb light can extinct light in a chemical manner, leather coated with the self-extinction polyurethane resin has the light extinction effect with natural color and gloss, and meanwhile through the addition of the crylic acid grafting substances, the water resistance and the solvent resistance of the self-extinction polyurethane resin are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a water-based polyurethane resin and a synthesis method thereof. Background technique [0002] With the improvement of people's living standards, the requirements for leather products are getting higher and higher, and leather products are required to develop towards two extremes, one is leather products coated with high-gloss and high-transparency polyurethane resin; the other is natural color and luster coated with matte polyurethane resin Leather products with good leather feel. The matting methods of leather finishing agents are mainly physical matting and chemical matting. Physical extinction is to add a matting agent to make the surface of the coating uneven during the film formation process, increase the scattering of light and reduce reflection. Chemical matting is to obtain low gloss by introducing some structures or groups that can absorb light i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/48C08G18/34C08G18/32C09D175/08D06M15/568
CPCC08G18/3206C08G18/3228C08G18/348C08G18/4854C08G18/6674C08G18/6685C08G18/6692C08G18/672C08G18/758C09D175/14C14C11/00
Inventor 孙海园黄凯刘娅林马金明闫克辉陈建栋于福哲范世杰边娜苗吉宾
Owner SHANDONG TIANQING TECH DEV
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