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Dimethyl carbonate azeotropic solvent composition, preparation method thereof, automobile low-temperature stoving varnish formula and application

A solvent composition, dimethyl carbonate technology, applied in the directions of detergent compositions, non-surface-active detergent compositions, cleaning composition solvents, etc., can solve the problem of paint film peeling, white skin peeling, and wrinkles on the surface of the paint film. or corrugation, etc., to achieve the effect of smooth paint film, good leveling and uniform color.

Active Publication Date: 2021-06-18
HAIKE GRP RES INST OF INNOVATION & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

5. The degree of wear resistance is different. If you hit the paint with a hard object, there is no abnormality and the paint film is not damaged; while the spray paint is prone to cracks, serious paint film peeling off, white peeling
This will easily lead to poor leveling of the car paint, making the surface of the paint film wrinkled or corrugated

Method used

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  • Dimethyl carbonate azeotropic solvent composition, preparation method thereof, automobile low-temperature stoving varnish formula and application
  • Dimethyl carbonate azeotropic solvent composition, preparation method thereof, automobile low-temperature stoving varnish formula and application
  • Dimethyl carbonate azeotropic solvent composition, preparation method thereof, automobile low-temperature stoving varnish formula and application

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Experimental program
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preparation example Construction

[0060] The present invention also provides a method for preparing the azeotropic solvent composition as described in any one of the above technical solutions, comprising the steps of:

[0061] 1) After mixing dimethyl carbonate and two or more compounds, an azeotropic solvent composition is obtained.

[0062] In the preparation method of the present invention, the specific preferred scheme of the raw material and the preferred numerical value of the number of added parts are consistent with the specific preferred scheme of the components in the aforementioned azeotropic solvent composition and the preferred numerical value of the added number of parts. This will not repeat them one by one.

[0063] In principle, the present invention has no particular limitation on the specific method and parameters of the mixing, and those skilled in the art can select and adjust according to production conditions, usage conditions and performance requirements. In order to better improve the ...

Embodiment 1

[0077] The azeotropic solvent composition for automotive low-temperature baking paint consists of the following component raw materials in mass percentages:

[0078] 5% methanol, 15% n-hexane, 5% methylcyclopentane, 5% cyclohexane, 5% diethanol formal, 15% n-heptane, 5% n-propyl ether, 45% dimethyl carbonate

[0079] Production method: Put the components in the steps into the stirring tank in sequence, dimethyl carbonate, n-propyl ether, n-heptane, cyclohexane, methylcyclopentane, n-hexane, and methanol, and Stir evenly in the stirred tank, the reactant has no stratification phenomenon, and is clear and transparent, without suspended matter and mechanical impurities. After standing for a period of time, it is the same as when it was just stirred uniformly. Low temperature baking solvent finished product.

[0080] Performance testing was performed on the azeotropic solvent composition for low-temperature automotive paints prepared in Example 1 of the present invention.

[008...

Embodiment 2

[0089] The azeotropic solvent composition for automotive low-temperature baking paint consists of the following component raw materials in mass percentages:

[0090] 5% methanol, 5% n-hexane, 5% methylcyclopentane, 5% cyclohexane, 5% diethanol formal, 15% n-heptane, 5% n-propyl ether, 55% dimethyl carbonate

[0091] Production method: Put the components in the steps into the stirring tank in sequence, dimethyl carbonate, n-propyl ether, n-heptane, cyclohexane, methylcyclopentane, n-hexane, and methanol, and Stir evenly in the stirred tank, the reactant has no stratification phenomenon, and is clear and transparent, without suspended matter and mechanical impurities. After standing for a period of time, it is the same as when it was just stirred uniformly. Low temperature baking solvent finished product.

[0092] Performance testing was performed on the azeotropic solvent composition for automotive low-temperature baking varnish prepared in Example 2 of the present invention. ...

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Abstract

The invention provides an azeotropic solvent composition. The azeotropic solvent composition comprises dimethyl carbonate and at least two or more compounds capable of respectively forming azeotropic mixtures with the dimethyl carbonate. The dimethyl carbonate azeotropic solvent composition is designed by introducing dimethyl carbonate into an automobile baking varnish solvent, at least two or more compound solvents capable of respectively forming azeotropic mixtures with dimethyl carbonate are adopted, solvent azeotropy is utilized for the first time to form a closely connected distillation range, and therefore, uniform volatilization of the solvent is ensured. The leveling effect of a paint film is greatly improved. The azeotropic solvent composition containing dimethyl carbonate provided by the invention has good leveling property, and can provide glossiness, improve the covering power of pigment, increase the flexibility and adhesive force of a paint film and reduce surface defects such as orange peel, vacuum, fisheye, crater and the like.

Description

technical field [0001] The invention belongs to the technical field of low-temperature baking paint for automobiles, and specifically relates to an azeotropic solvent composition and a preparation method thereof, formula and application of low-temperature baking paint for automobiles, in particular to a dimethyl carbonate azeotropic solvent composition and a preparation method thereof, Formula and application of automotive low-temperature baking paint. Background technique [0002] Paint is coated on the surface of the object to be protected or decorated, and can form a continuous solid film firmly attached to the object to be coated, also known as paint film or coating, usually based on resin, or oil, or emulsion, adding Or do not add pigments, fillers, add corresponding additives, and use organic solvents or water to prepare viscous liquids. There are many types of coatings, among which, according to the form of the product, they are mainly divided into: solvent-based coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/20C09D11/033C09J11/06C11D3/44C11D7/50
CPCC09D7/20C09D11/033C09J11/06C11D3/43C11D7/5022
Inventor 向玉辉杨会会张勇
Owner HAIKE GRP RES INST OF INNOVATION & TECH
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