Multiple curable aqueous hyperbranched polyurethane inorganic nanomaterial hybrid coating agent and preparation method thereof

A technology of inorganic nanomaterials and hyperbranched polyurethane, applied in polyurea/polyurethane coatings, coatings, chemical treatment of small raw hides/large raw hides/leather skins/furs, etc., can solve the limitations of curing depth, application restrictions, and the shape of cured objects Limitations and other issues, to achieve long-term stable performance, expand the scope of application, and long service life

Inactive Publication Date: 2009-12-09
ZHEJIANG DONGHUA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the UV curing system has obvious advantages, there are also some disadvantages, mainly including: the curing depth is limited; it is difficult to apply in the colored system; the shadow part cannot be cured; the shape of the cured object is limited, etc. some applications
[0004] Polyurethane materials have outstanding advantages such as good strength, wear resistance, and good low-temperature performance. With the development of modern science and technology, the requirements for materials are getting higher and higher. Compared with inorganic materials, polyurethane materials have high temperature resistance, weather resistance and hardness. There are deficiencies that limit its application in some specific fields

Method used

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  • Multiple curable aqueous hyperbranched polyurethane inorganic nanomaterial hybrid coating agent and preparation method thereof
  • Multiple curable aqueous hyperbranched polyurethane inorganic nanomaterial hybrid coating agent and preparation method thereof
  • Multiple curable aqueous hyperbranched polyurethane inorganic nanomaterial hybrid coating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1, anionic aromatic soft polyurethane finishing agent

[0024] (1) Preparation of anionic aromatic polyurethane prepolymer:

[0025] In a three-necked flask equipped with a condensing device and an electric stirrer, the molar ratio is n NCO / n OH =2.3:1 Add neopentyl glycol and toluene diisocyanate (TDI) (or 4,4'-diphenylmethane diisocyanate (MDI)), keep warm at 40°C for 1.5 hours; add the above-mentioned diisocyanate and diol quality A total amount of 5% of acetone and the above-mentioned diisocyanate and dimethylol propionic acid of 2% of the total mass of diols were heated up at 75°C for 2 hours, and polyether diols accounting for 20% of the diisocyanate mole fraction were added. Heat the temperature to 75°C and react for 1.5 hours to obtain a polyurethane prepolymer.

[0026] (2) Polyurethane containing hyperbranched structure:

[0027] The polyurethane prepolymer obtained in step (1) is cooled to about 50°C, and dipentaerythritol accounting for 6.5% ...

Embodiment 2

[0030] Embodiment 2, anionic aromatic rigid polyurethane finishing agent

[0031] (1) Preparation of anionic aromatic polyurethane prepolymer:

[0032] In a three-necked flask equipped with a condensing device and an electric stirrer, the molar ratio is n NCO / n OH =2.1:1 Add neopentyl glycol and toluene diisocyanate (TDI) (or 4,4'-diphenylmethane diisocyanate (MDI)), keep warm at 40°C for 1 hour; add the above-mentioned diisocyanate and diol quality A total amount of 5% acetone and the above-mentioned diisocyanate and neopentyl glycol mass total amount of 2% dimethylol propionic acid are heated up to about 80°C for about 1 hour, and polyether two For polyalcohols, keep warm at 80°C for 1.5 hours.

[0033] (2) Polyurethane containing hyperbranched structure:

[0034] The polyurethane prepolymer of step (1) gained is cooled to 60 ℃, adds the hyperbranched polyester polyol Bltorn H10 that accounts for (1) described diisocyanate molar fraction 2%, adds the polyurethane prepol...

Embodiment 3

[0037] Embodiment 3, anionic aliphatic rigid polyurethane finishing agent

[0038] (1) Preparation of anionic aliphatic polyurethane prepolymer:

[0039] In a three-necked flask equipped with a condensing device and an electric stirrer, the molar ratio is n NCO / n OH =2.5:1 Add neopentyl glycol and isophorone diisocyanate (IPDI), add 0.1% catalyst triethylenediamine of the total mass of the system, keep warm at 40°C for 2 hours; add the above-mentioned diisocyanate and diol mass A total amount of 5% butanone and the above-mentioned diisocyanate and neopentyl glycol mass total amount of 2% dimethylol butyric acid were heated up to 85° C. for 2.5 hours, and polyether binary resins accounting for 10% of the diisocyanate mole fraction were added. Alcohol, keep warm at 85°C for 2 hours.

[0040] (2) Polyurethane containing hyperbranched structure:

[0041] The polyurethane prepolymer obtained in step (1) is cooled to 60° C., adding pentaerythritol accounting for 12.5% ​​of the ...

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Abstract

The invention relates to a multiple curable aqueous hyperbranched polyurethane inorganic nanomaterial hybrid coating agent and a preparation method thereof. The coating agent comprises the following compositions in percentage by mass: 20 to 45 percent of polyurethane shown in a structural formula below, and 55 to 80 percent of deionized water. A film coated by the coating agent has the characteristics of flatness, smoothness, temperature resistance, oil resistance and the like, and has excellent low-temperature toughness performance. Leather coated by the coating agent has the characteristics of high gloss, good hand touch, abrasion resistance, difficult cracking, good elasticity, excellent water resistance and deflection resistance, and the like.

Description

Technical field: [0001] The invention relates to a water-based polyurethane finishing agent used in the fields of shoe upper leather, garment leather or sofa leather, and in particular to a multi-curable water-based hyperbranched polyurethane inorganic nanomaterial hybrid finishing agent and a preparation method thereof. Background technique: [0002] Polyurethane (PU), as a new leather finishing material, has been applied in the field of leather finishing, and has attracted more and more attention, especially the water-based polyurethane finishing agent. Polyurethane, also known as polyurethane, is a general term for polymer compounds formed by the action of dibasic or polyisocyanate and dibasic or polyhydroxy compounds. The film formed by PU is soft and smooth, with pleasant luster, and has excellent properties such as friction resistance, bending resistance, aging resistance, heat resistance, cold resistance and solvent resistance. It is one of the most ideal film-forming...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/16C08G18/34C08G18/10C14C11/00
Inventor 张帆辛中印周向东孙大庆荆春贵
Owner ZHEJIANG DONGHUA IND
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