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Nano modified organosilicon acroleic acid polyurethane coating and preparation

A technology of silicon hydroxyl acrylic polyurethane and acrylic polyurethane, which is applied in the field of nano-modified organosilicon acrylic polyurethane coating and preparation, to achieve the effect of high hardness, large bond energy and good weather resistance

Inactive Publication Date: 2009-07-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-modified organosilicon acrylic polyurethane coatings prepared by in-situ polymerization have not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] 1, add 6.45 gram nano-SiO in the four-necked flask that thermometer, condensing tube, stirrer, constant pressure funnel are housed 2 Mix well with 200mL γ-methacryloxypropyltrimethoxysilane, pass nitrogen gas for 30 minutes, adjust the stirring speed to 1500rpm, make it stir at high speed for 30 minutes, then take out the mixed solution, pour it into the grinder and add 15 grams of corundum beads with a diameter of 1mm were ground and dispersed for 24 hours. After the dispersion was completed, the pre-dispersed nano solution was taken out and poured into a clean four-necked flask.

[0022] II. Distill the prepared high-solid hydroxyl acrylic resin at -0.1MPa and 60°C for 2.5 hours under reduced pressure to remove unreacted monomers, mainly acrylates and methyl acrylates. bodies and residual solvents.

[0023] III. Fully mix 400 grams of purified high-solid hydroxyacrylic resin, 85 grams of butyl acetate, 175 grams of xylene, 30 grams of azobisisobutyronitrile and 10 gr...

Embodiment approach 2

[0026] 1, add 5.15 gram nano-SiO in the four-necked flask that thermometer, condensing tube, stirrer, constant pressure funnel are housed 2 Mix well with 200mL γ-methacryloxypropyltrimethoxysilane monomer, blow nitrogen for 30 minutes, adjust the stirring speed to 1500rpm, make it stir at high speed for 30 minutes, then take out the mixed solution and pour it into the grinder Add 15 grams of corundum beads with a diameter of 1 mm to grind and disperse for 24 hours. After the dispersion is completed, take out the pre-dispersed nanometer solution and pour it into a clean four-necked flask.

[0027] II. Distill the prepared high-solid hydroxyl acrylic resin at -0.1MPa and 60°C for 2 hours under reduced pressure to remove unreacted monomers, mainly acrylates and methyl acrylates. bodies and residual solvents.

[0028] III. Fully mix 400 grams of purified high-solid hydroxyacrylic resin, 85 grams of butyl acetate, 175 grams of xylene, 30 grams of azobisisobutyronitrile and 10 gram...

Embodiment approach 3

[0031]Add 3.87 g of nano-SiO to a four-neck flask equipped with a thermometer, condenser, stirrer, and constant pressure funnel 2 and 200mL of γ-methacryloxypropyltrimethoxysilane monomer and fully mixed, 30 grams of tert-butyl perbenzoate and 10 grams of mercaptoethanol were fully mixed, according to the ratio of NCO / OH=1.3 in nano-SiO 2 Add diphenylmethane diisocyanate and 0.1 gram of stannous acetate to the modified organosilicon high-solid hydroxyl acrylic resin, the solid content of the coating obtained is 70wt%, and the impact strength of the coating film is 100cm. The strength is grade 0, the pencil hardness is 6H, and the acid resistance and water resistance are excellent, and the others are the same as the first embodiment.

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Abstract

A nanometer advanced organosilicone acrylic polyurethane coating and a preparation method thereof belong to the field of fine chemistry industry, and in particular relates to a nanometer advanced organosilicone acrylic polyurethane coating for vehicles or motorcycles and a preparation method thereof. The coating is mainly coated on the surfaces of priming paint and colored paint of vehicles or motorcycles, thereby being capable of improving multiple performances such as weather resistance, acid rain resistance and scratch assistance. The paint is characterized in that nano-particles are intensively dispersed and then have in-situ polymerization with high solid hydroxyl acrylic resin for copolymerization so as to prepare nanometer advanced organosilicone high solid hydroxyl acrylic resin, and an appropriate amount of diisocyanate is then added so as to obtain the nanometer advanced organosilicone acrylic polyurethane coating. The experimental method in the invention has the advantages of easy and simple operation and low production cost without using particular instruments and working procedures. The paint is convenient for large-scale production, has better weather resistance, hardness, acid rain resistance and scratch assistance, and has certain economic and social benefits.

Description

technical field [0001] The invention discloses a nano-modified organosilicon acrylic polyurethane coating and a preparation method thereof, which belong to the field of fine chemicals, and particularly relate to a nano-modified organosilicon acrylic polyurethane coating and a preparation method for automobiles or motorcycles, which are mainly applied to automobiles or motorcycles. The primer and paint surface of the motorcycle can improve the weather resistance, acid rain resistance and scratch resistance of the coating and many other properties. Background technique [0002] With the enhancement of human environmental protection awareness and the gradual strictness of environmental regulations, the development of environmentally friendly coatings is becoming more and more important. Taking the "5E principles" proposed by the U.S. Environmental Protection Agency (that is, improving the quality of the coating film, facilitating construction, saving energy, saving resources, a...

Claims

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Application Information

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IPC IPC(8): C09D175/14C08G18/61C08G18/62
Inventor 祝方万鹏邹炜
Owner TAIYUAN UNIV OF TECH
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