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Nano zinc oxide grafted aqueous UV light-cured polyurethane resin and preparation method thereof

A technology of nano-zinc oxide and polyurethane resin, which is applied in the field of coatings, can solve the problems of complex modification process and high cost of modifiers, and achieve the effects of environmental friendliness, moderate particle size and good storage stability

Active Publication Date: 2016-12-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are all used after modifying the nanomaterials, the modification process is complicated, and the cost of the modifier is high

Method used

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  • Nano zinc oxide grafted aqueous UV light-cured polyurethane resin and preparation method thereof
  • Nano zinc oxide grafted aqueous UV light-cured polyurethane resin and preparation method thereof
  • Nano zinc oxide grafted aqueous UV light-cured polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Pretreatment of nano-zinc oxide: dry nano-zinc oxide in a vacuum drying oven at 60°C for about 3 hours at a relative vacuum pressure of -0.095MPa;

[0035] (2) Synthesis of polyurethane prepolymer I: Add 26.65g of toluene-2,4-diisocyanate (TDI-80) and 25.51g of polyether diol (M w =1000), drop 0.052g catalyst dibutyltin dilaurate, react in a constant temperature water bath, heat up to 80°C, keep this temperature for about 1.5h, and the NCO value of di-n-butylamine titration reaches or is slightly lower than the theoretical When the value is , the semi-blocked polyurethane prepolymer I is obtained;

[0036] (3) Synthesis of polyurethane prepolymer II: cool down to 65°C, weigh 8.654g of dimethylolpropionic acid (DMPA), dissolve it with 18g of acetone, place it in a dropping funnel, drop it into a four-neck flask, drop The acceleration is 3-4s / drop, keep this temperature for 3 hours, add a proper amount of acetone to adjust the viscosity during the period, when the NC...

Embodiment 2

[0044] (1) Pretreatment of nano-zinc oxide: dry nano-zinc oxide in a vacuum drying oven at 60°C for about 3 hours at a relative vacuum pressure of -0.095MPa;

[0045] (2) Synthesis of polyurethane prepolymer I: Add 26.65g of toluene-2,4-diisocyanate (TDI-80) and 25.51g of polyether diol (M w =1000), add dropwise 0.052g catalyst dibutyltin dilaurate, react in a constant temperature water bath, heat up to 85°C, keep this temperature for about 1.5h, and the NCO value of di-n-butylamine titration reaches or is slightly lower than the theoretical When the value is , the semi-blocked polyurethane prepolymer I is obtained;

[0046] (3) Synthesis of polyurethane prepolymer II: cool down to 65°C, weigh 8.654g of dimethylolpropionic acid (DMPA), dissolve it with 18g of acetone, place it in a dropping funnel, drop it into a four-neck flask, drop The acceleration is 3-4s / drop, keep this temperature for 3 hours, add a proper amount of acetone to adjust the viscosity during the period, whe...

Embodiment 3

[0056] (1) Pretreatment of nano-zinc oxide: dry nano-zinc oxide in a vacuum drying oven at 60°C for about 3 hours at a relative vacuum pressure of -0.095MPa;

[0057] (2) Synthesis of polyurethane prepolymer I: Add 26.65g of toluene-2,4-diisocyanate (TDI-80) and 25.51g of polyether diol (Mw =1000), drop 0.052g catalyst dibutyltin dilaurate, react in a constant temperature water bath, heat up to 80°C, keep this temperature for about 1.5h, and the NCO value of di-n-butylamine titration reaches or is slightly lower than the theoretical When the value is , the semi-blocked polyurethane prepolymer I is obtained;

[0058] (3) Synthesis of polyurethane prepolymer II: cool down to 65°C, weigh 8.654g of dimethylolpropionic acid (DMPA), dissolve it with 18g of acetone, place it in a dropping funnel, drop it into a four-neck flask, drop The acceleration is 3-4s / drop, keep this temperature for 3 hours, add a proper amount of acetone to adjust the viscosity during the period, when the NCO...

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Abstract

The invention belongs to the technical field of paints, and discloses a nano zinc oxide grafted aqueous UV light-cured polyurethane resin and a preparation method thereof. The preparation method comprises the following steps: reacting aromatic or aliphatic diisocyanate with polyether glycol at a temperature of 70 to 90 DEG C in the presence of a catalyst to obtain a polyurethane prepolymer (I); controlling the temperature in a range of 60 to 80 DEG C, dropwise adding an acetone solution of dimethylolpropionic acid to carry out reactions to obtain a polyurethane prepolymer (II); then adding hydroxypropyl acrylate, which contains nano ZnO, a catalyst, and a polymerization inhibitor, and a mixed dispersion liquid of pentaerythritol triacrylate to carry out graft copolymerization reactions, cooling the reaction products, then adding a neutralizing agent and water, stirring, evenly mixing, and removing the solvent (acetone) to obtain the nano zinc oxide grafted aqueous UV light-cured polyurethane resin. The provided polyurethane resin has the advantages of high mechanical strength, high light-cured speed, excellent water resistant performance, and good storage stability.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a nanometer zinc oxide grafted water-based UV photocurable polyurethane resin and a preparation method thereof. Background technique [0002] Light-curing coatings have been applied in many fields due to their advantages of fast drying and curing, environmental protection and energy saving, but there are still some shortcomings. Both the volatilization of the agent and the degradation of the photoinitiator will produce VOC, which will pollute the environment to a certain extent (Wei Jie, Jin Yangzhi. Photocurable coatings [M]. Chemical Industry Press, 2013). Water-based ultraviolet (UV) curing coatings combine the advantages of traditional light-curing coatings and water-based coatings, and use water as a diluent to adjust the viscosity of the system, which has the advantages of environmental protection and economy. [0003] Commonly used photoinitiators have some p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/67C08G18/66C08G18/48C08G18/34C08K3/22C09D175/14
CPCC09D175/14C08G18/4825C08G18/6692C08G18/672C08G18/7614C08K3/22C08K2201/011C08K2003/2296
Inventor 叶代勇冯俊
Owner SOUTH CHINA UNIV OF TECH
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