Light-resistant antibacterial water-based polyurethane coating and preparation method thereof

A water-based polyurethane and light-resistant technology, applied in polyurea/polyurethane coatings, anti-fouling/underwater coatings, fire-resistant coatings, etc., can solve the problems of poor dispersion of graphene materials, achieve easy volatilization, reduce volatility, and slow down volatilization speed Effect

Active Publication Date: 2018-08-10
唐山德生科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the dispersion of graphene materials in water is poor, so its application in coatings is limited to a certain extent.

Method used

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  • Light-resistant antibacterial water-based polyurethane coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] A preparation method for light-resistant and antibacterial waterborne polyurethane coating, comprising the steps of:

[0033] S1: Functionalization of graphene oxide, disperse 0.4g graphene oxide in dry 24g DMF, under nitrogen protection, add 5g polyisocyanate, then drop 0.065g dibutyltin dilaurate, react at 40°C 1h, washing and drying to obtain functionalized graphene oxide;

[0034] S2: To prepare cyclodextrin-antibacterial agent clathrate, add 1.5g sodium lauryl polyoxyethylene ether sulfate to 50mL deionized water at 25°C, stir well to obtain a dispersant aqueous solution, add 10gβ- Cyclodextrin, disperse 5min with high-speed disperser 1500rmp, make uniform suspension, then grind 30min under 2600rmp with Shanghai Senler horizontal grinder, then slowly add the ethanol solution of tea tree essential oil (4g tea tree essential oil is dissolved in 5g ethanol middle), then grind to a uniformly dispersed state with a grinding speed of 2600rmp, suction filter with a 300-m...

Embodiment 2

[0038] A preparation method for light-resistant and antibacterial waterborne polyurethane coating, comprising the steps of:

[0039] S1: Functionalization of graphene oxide, disperse 0.5g graphene oxide in dry 35g DMF, under nitrogen protection, add 7.5g polyisocyanate, then dropwise add 0.125g dibutyltin dilaurate, at 60℃ React for 1.5h, wash and dry to obtain functionalized graphene oxide;

[0040] S2: Prepare cyclodextrin-antibacterial agent clathrate, add 2.4g sodium lauryl polyoxyethylene ether sulfate to 50mL deionized water at 25°C, stir evenly to obtain dispersant aqueous solution, add 12gβ- Cyclodextrin, disperse 5min with high-speed disperser 1500rmp, make uniform suspension, then grind 30min under 2600rmp with Shanghai Senler horizontal grinder, then slowly add the ethanol solution of tea tree essential oil (6.5g tea tree essential oil is dissolved in 7g in ethanol), then grind to a uniformly dispersed state with a grinding speed of 2600rmp, filter with suction thr...

Embodiment 3

[0044] A preparation method for light-resistant and antibacterial waterborne polyurethane coating, comprising the steps of:

[0045] S1: Functionalization of graphene oxide, disperse 0.6g graphene oxide in dry 50g DMF, under nitrogen protection, add 10g polyisocyanate, then drop 0.2g dibutyltin dilaurate, react at 80°C 2h, washing and drying to obtain functionalized graphene oxide;

[0046] S2: Prepare cyclodextrin-antibacterial agent clathrate, add 2.5g sodium lauryl sulfate to 50mL deionized water at 25°C, stir evenly to obtain dispersant aqueous solution, add 20g β-cyclodextrin to the dispersant aqueous solution , disperse 5min with high-speed disperser 1500rmp, make uniform suspension, then grind 30min under 2600rmp with Shanghai Senler horizontal grinder, then slowly add the ethanol solution of tea tree essential oil (8g tea tree essential oil is dissolved in 8g ethanol), Then grind at a grinding speed of 2600rmp to a uniformly dispersed state, suction filter with a 300-...

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Abstract

The invention relates to light-resistant antibacterial water-based polyurethane coating and a preparation method thereof. The light-resistant antibacterial water-based polyurethane coating is preparedfrom the following raw materials of light-resistant antibacterial compounds, oligomeric polyols, polyisocyanates, catalysts, chain expanding agents, crosslinking agents and neutralizers, wherein thelight-resistant antibacterial compounds are oxidized graphene-cyclodextrin-antibacterial agent compounds and are obtained by modifying oxidized graphene by antibacterial agent coated cyclodextrin. Thecyclodextrin molecules are used for modifying the oxidized graphene; meanwhile, the antibacterial agents are contained in an inner cavity of the cyclodextrin molecules; the oxidized graphene-cyclodextrin-antibacterial agent light-resistant antibacterial compounds are obtained; the light-resistant antibacterial compounds are added into the water-based polyurethane coating, so that the water-basedpolyurethane coating has excellent ultraviolet light resistant performance, high-temperature-resistant performance, anti-aging performance, acid-alkali-resistant performance, antibacterial performanceand the like.

Description

technical field [0001] The invention relates to the field of polyurethane coatings, in particular to a light-resistant and antibacterial water-based polyurethane coating and a preparation method thereof. Background technique [0002] As a common polymer material, water-based polyurethane coating has high elasticity, good flexibility, high elastic modulus and excellent wear resistance, and has good weather resistance, oil resistance, grease resistance and many kinds of solvent resistance In addition, water-based polyurethane has various forms and convenient molding process, so it is widely used in leather finishing, printing and dyeing prevention, paper industry, architectural coatings and adhesives and other fields. However, water-based polyurethane coating products have low strength, poor heat resistance, water resistance, antistatic, antibacterial, flame retardant and other properties, and because the field of use is often exposed to sunlight, and sunlight contains a large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C09D175/04C09D5/14C09D5/18C08G18/66C08G18/48C08G18/64C08G18/12C08G18/32C08B37/16
CPCC08B37/0015C08G18/12C08G18/4854C08G18/6484C09D5/14C09D5/18C09D175/04C09D175/08C08G18/3228C08G18/3206
Inventor 林同福弭明新卢志军
Owner 唐山德生科技有限公司
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