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Polyester resin for low gloss powder paint

A polyester resin and powder coating technology, applied in powder coatings, polyester coatings, coatings, etc., can solve problems such as drift of extinction degree, unstable coating film extinction effect, uneven product quality, etc.

Active Publication Date: 2019-08-02
中山市创华化工实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many varieties of polyester resins specially used to manufacture indoor matting powder coatings at home and abroad, and the product quality is uneven. When preparing matting powder coatings, the defect of unstable matting effect of the coating film is prone to occur, and the coating film is not stable. The matting effect is easily affected by factors such as the type of pigments and fillers, mixing effect, baking temperature and mixing ratio, and the degree of matting has a large drift problem

Method used

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  • Polyester resin for low gloss powder paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of polyester resin for low gloss powder coating, its preparation method is as follows:

[0028] The Serratia marcescens strain (Serratia marcescens) LS-1 was applied to the modification of saturated polyester resin.

[0029] The saturated polyester resin is 2098 carboxyl-containing saturated polyester resin.

[0030] The modification steps are as follows:

[0031] (1) After activating the Serratia marcescens bacterial strain (Serratia marcescens) LS-1 bacterial classification, set aside;

[0032] (2) Prepare bacterial cell buffer, the formula is as follows, and the following are all mass percentages:

[0033] 2% trehalose, 1.2% white carbon black, 5% sucrose, 1% glycerin, 1% polyethylene glycol 200, and the rest is water;

[0034] (3) Prepare the bacterial liquid, dissolve the activated bacterial suspension into the bacterial cell buffer, and adjust the bacterial cell concentration to be 10 7 cfu / ml;

[0035] (4) Evenly spray the bacterium liquid to the resi...

Embodiment 2

[0038] A kind of polyester resin for low gloss powder coating, its preparation method is as follows:

[0039] The Serratia marcescens strain (Serratia marcescens) LS-1 was applied to the modification of saturated polyester resin.

[0040] The saturated polyester resin is 2098 carboxyl-containing saturated polyester resin.

[0041] The modification steps are as follows:

[0042] (1) After activating the Serratia marcescens bacterial strain (Serratia marcescens) LS-1 bacterial classification, set aside;

[0043] (2) Prepare bacterial cell buffer, the formula is as follows, and the following are all mass percentages:

[0044] 3% trehalose, 1.5% white carbon black, 6% sucrose, 1% glycerin, 1% polyethylene glycol 200, and the rest is water;

[0045] (3) Prepare the bacterial liquid, dissolve the activated bacterial suspension into the bacterial cell buffer, and adjust the bacterial cell concentration to be 10 7 cfu / ml;

[0046] (4) Evenly spray the bacterium liquid onto the re...

Embodiment 4

[0061] Comparative example: buffer only, no Serratia marcescens strain added

[0062] A kind of polyester resin for low gloss powder coating, its preparation method is as follows:

[0063] The saturated polyester resin is 2098 carboxyl-containing saturated polyester resin.

[0064] The modification steps are as follows:

[0065] (1) Prepare the buffer solution, the formula is as follows, and the following are all mass percentages:

[0066] 2% trehalose, 1.5% white carbon black, 8% sucrose, 1% glycerin, 1% polyethylene glycol 200, and the rest is water;

[0067] (2) Evenly spray the buffer solution on the resin powder, the mass ratio of the buffer solution and the resin powder is 1:50, and keep the temperature at 40 degrees Celsius for 10 hours of bio-fermentation modification;

[0068] (3) drying at 80 degrees Celsius to inactivate.

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Abstract

The invention discloses polyester resin for low gloss powder paint, which is prepared as follows: a Serratia marcescens strain is applied to the modification of saturated polyester resin. The modification steps are as follows: (1) the Serratia serrata strain is activated for later use; (2) a thallus buffer solution is prepared, wherein the formula is as follows (in mass percentage): 2 to 3% of trehalose, 1.2 to 1.5% of white carbon black, 5 to 8% of sucrose, 1% of glycerol, 1% of polyethylene glycol 200, and the balance of water; (3) bacterial liquid is prepared, specifically, the activated bacterial suspension is dissolved into the thallus buffer solution to adjust the bacterial concentration to 10<7> cfu / ml; (4) the bacterial solution is evenly sprayed to resin powder, wherein the mass ratio of the bacterial liquid to the resin powder is 1 to (50 to 60), and the temperature is maintained at 40 DEG C for bio-fermentation modification for 8 to 10 hours; (5) drying and inactivation areperformed at 80 Celsius degree.

Description

technical field [0001] The invention relates to a polyester resin for low-gloss powder coatings, which belongs to the technical field of microbial modification and environmental protection new materials. Background technique [0002] Powder coating is a solid powder synthetic resin coating composed of solid resin and pigments, fillers and additives. Unlike ordinary solvent-based paints and water-based paints, its dispersion medium is not solvent and water, but air. It has the characteristics of no solvent pollution, 100% film formation and low energy consumption. There are two types of powder coatings, thermoplastic and thermosetting. Thermoplastic powder coatings have poor film appearance (gloss and leveling) and poor adhesion to metals, so they are rarely used in the field of automotive coatings. Thermosetting powder coatings are generally used in automotive coatings, and thermosetting powder coatings are The thermosetting synthetic resin is used as the film-forming sub...

Claims

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Application Information

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IPC IPC(8): C12P7/62C09D167/00C09D5/03C12R1/43
CPCC09D5/03C09D167/00C12P7/625
Inventor 袁耀鹏
Owner 中山市创华化工实业有限公司
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