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A kind of preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating

A technology of methyl silicone oil and nitrocellulose, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor water resistance, low fullness, and weak adhesion of the coating film, and achieve short time consumption, improved water resistance, The effect of simple preparation process

Inactive Publication Date: 2016-02-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing water-based nitro-based coatings have defects such as poor stability, poor water resistance of the coating film, weak adhesion, and low fullness, and they are only used in leather finishing.

Method used

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  • A kind of preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating
  • A kind of preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating of the present invention comprises the following steps:

[0020] 1) Weigh a certain amount of isophorone diisocyanate trimer, N-methylpyrrolidone, dimethylol propionic acid, and dibutyltin dilaurate after 4A molecular sieve dehydration treatment, wherein, isophorone diisocyanate The ratio between isocyanate trimer, N-methylpyrrolidone, dimethylol propionic acid and dibutyltin dilaurate dehydrated by 4A molecular sieve is 4.0g: 3.0g: 2.0g: 0.1mL. Methylpropionic acid is dissolved in N-methylpyrrolidone to obtain the N-methylpyrrolidone solution of dimethylolpropionic acid, and then the N-methylpyrrolidone solution of dimethylolpropionic acid is Add dibutyltin dilaurate and isophorone diisocyanate trimer after 4A molecular sieve dehydration into a four-necked flask, and react at a temperature of 40°C. After the reaction is completed, the temperature is raised to 70°C, an...

Embodiment 2

[0029] The preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating of the present invention comprises the following steps:

[0030] 1) Weigh a certain amount of isophorone diisocyanate trimer, N-methylpyrrolidone, dimethylol propionic acid, and dibutyltin dilaurate after 4A molecular sieve dehydration treatment, wherein, isophorone diisocyanate The ratio between isocyanate trimer, N-methylpyrrolidone, dimethylolpropionic acid and dibutyltin dilaurate after dehydration treatment with 4A molecular sieve is 5.0g: 4.0g: 3.0g: 0.3mL. Methylpropionic acid is dissolved in N-methylpyrrolidone to obtain the N-methylpyrrolidone solution of dimethylolpropionic acid, and then the N-methylpyrrolidone solution of dimethylolpropionic acid is Add dibutyltin dilaurate and isophorone diisocyanate trimer after 4A molecular sieve dehydration into a four-neck flask, and react at a temperature of 45°C. After the reaction is completed, the temperature is ra...

Embodiment 3

[0039] The preparation method of methyl silicone oil modified water-based nitrocellulose emulsion for coating of the present invention comprises the following steps:

[0040] 1) Weigh a certain amount of isophorone diisocyanate trimer, N-methylpyrrolidone, dimethylol propionic acid, and dibutyltin dilaurate after 4A molecular sieve dehydration treatment, wherein, isophorone diisocyanate The ratio between isocyanate trimer, N-methylpyrrolidone, dimethylol propionic acid and dibutyltin dilaurate after dehydration treatment with 4A molecular sieve is 4.5g: 3.5g: 2.5g: 2mL, and the dimethylol Propionic acid was dissolved in N-methylpyrrolidone to obtain the N-methylpyrrolidone solution of dimethylolpropionic acid, and then the N-methylpyrrolidone solution of dimethylolpropionic acid was subjected to 4A under the protection of nitrogen. Add dibutyltin dilaurate and isophorone diisocyanate trimer after molecular sieve dehydration into a four-neck flask, and react at a temperature of...

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Abstract

The invention discloses a preparation method of methyl silicone oil-modified waterborne nitrocellulose emulsion for paint. The method comprises the steps of (1) dissolving dihydromethyl propionic acid into N-methyl-pyrrolidone; then, feeding the N-methyl-pyrrolidone solution of dihydromethyl propionic acid protected by nitrogen, dibutyltin dilaurate treated by 4A molecular sieve dehydration process and isophorone diisocyanate tripolymer into a four-mouth flask, carrying out reaction, and then heating up to 70-75 DEG C; feeding butanone solution of nitrocellulose, carrying out reaction under the condition of heat preservation, and cooling to 40-45 DEG C after the reaction; then feeding triithylamine to obtain a mixture; (2) feeding methyl silicone oil into the mixture obtained in the step (1), cooling after the reaction, and feeding 60-70ml of ionized water while stirring; stirring again to obtain the methyl silicone oil-modified waterborne nitrocellulose emulsion for the paint. The methyl silicone oil-modified waterborne nitrocellulose emulsion for the paint is good in water resistance.

Description

technical field [0001] The invention relates to a method for preparing a paint film-forming material, in particular to a method for preparing a methyl silicone oil-modified water-based nitrocellulose emulsion for paint. Background technique [0002] Nitrocellulose, also known as nitrocellulose, is the main film-forming substance of nitro lacquer. Nitro lacquer has the characteristics of fast drying, good decoration, and good outdoor weather resistance. It can also be polished, waxed and polished to modify the paint. The defects caused by the membrane during construction, suitable for large-area construction and other unique properties. However, the traditional nitro paint has high VOC content, which causes environmental pollution when used. With the continuous establishment of environmental regulations and the continuous enhancement of environmental awareness, the use of solvent-based coatings is limited, and the demand for environmentally friendly coatings is increasing. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D101/18C09D175/04C09D183/04C08G18/79C08G18/34
Inventor 苏秀霞董伟张海宁周丽张云曹鹏妮郭明媛王楠卜海燕吕檬夷赵擎霄
Owner SHAANXI UNIV OF SCI & TECH