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Method for preparing paint from reclaimed waste paint slag

A technology of paint slag and paint, applied in coatings, rubber derivative paints, polyester paints, etc., can solve problems such as waste and impact on the surrounding environment, and achieve the effects of reducing production costs, reducing paint manufacturing costs, and reducing environmental pollution

Inactive Publication Date: 2008-01-16
山东时风(集团)有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Waste paint slag is produced during paint spraying, which not only causes a lot of waste, but also affects the surrounding environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] This embodiment is a method for processing single-component self-drying anti-corrosion enamel. The steps are: soak the paint residue with xylene or / and butanol solvent in which the paint residue accounts for 1 / 2 of the volume, filter the paint residue, and remove larger impurities , and then dehydrate the paint slag in a vacuum low temperature environment with a vacuum degree of 0.5-0.8MPa and a temperature of 60-80°C, and then add 566 alkyd resin at a ratio of 10% to 20%, and disperse at a ratio of 0.2-0.5%. Agent, wetting agent in the proportion of 0.1-0.3%, adding pigments as needed, and then grind the mixture to the required fineness, generally 30μm. Afterwards, add reactive groups at a ratio of 10 to 20%, modify the resin to improve its performance, add a leveling agent at a ratio of 0.1 to 0.5%, add a naphthenic acid drier at a ratio of 0.2 to 1%, and finally Use xylene: butanol: CAC (or ethylene glycol butyl ether or 150# aromatic hydrocarbon) = 8: 2: 1 to adjust...

Embodiment 2

[0025] This embodiment is a method for processing two-component self-drying enamel. The steps are: soak the paint residue with xylene or butanol solvent accounting for 1 / 2 of the paint residue weight, filter the paint residue, and then vacuum the residue at a vacuum of 0.5 to 0.8 Under the condition of MPa and temperature of 60-80℃, carry out vacuum low-temperature dehydration, then add 512 alkyd resin in the proportion of 50%, dispersant in the proportion of 0.2-0.5%, wetting agent in the proportion of 0.1-0.3%, and according to Pigments need to be added, grind the mixture to the required fineness, add defoamer at a ratio of 0.1-0.3%, leveling agent at a ratio of 0.1-0.5%, and accelerator at a ratio of 0.3-0.5% to increase cross-linking Density, to promote the reaction curing speed, add solvent to adjust to the required viscosity, and finally add curing agent N75 or 740, the weight ratio of curing agent to paint residue is 1:3~1:5.

[0026] The indicators achieved by the pain...

Embodiment 3

[0038] This embodiment is a method for processing amino baking varnish. The steps are: soak the paint residue with xylene or butanol solvent accounting for 1 / 2 of the paint residue volume, filter the paint residue, and then vacuum the paint residue at a vacuum degree of 0.5 to 0.8 Carry out vacuum low-temperature dehydration at MPa and temperature of 60-80°C, then add 512 alkyd resin at a ratio of 40%, dispersant at a ratio of 0.2-0.5%, wetting agent at a ratio of 0.1-0.3%, and pigments , Add ethylene glycol butyl ether or CAC at a ratio of 5 to 10%, grind the mixture to the required fineness, and press 20％ Add A08-55 resin in proportion, leveling agent in proportion of 0.1-0.5%, defoamer in proportion of 0.1-0.3%, and finally adjust viscosity with xylene and butanol in proportion of 7 / 3 to make paint.

[0039] The indicators achieved by the paint are:

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Abstract

The invention discloses a method for preparing paint from waste paint slag. The method comprises the steps as follows: 1. adding solvent into the fresh paint slag for dissolving after impurity is removed; 2.dehydrating the filtrated dissolved solution; 3. blending the dehydrated resultant with a resin which is provided with functions of wetting, encapsulating and film-forming; 4. grinding after uniformly mixing with dispersant and wetting agent; 5.adding rheological agent and anti-bubbling agent and reducing the viscosity of the mixture to meet the requirement. The method realizes saving by reutilizing paint slag .For the corporations using large amount of paint, the method largely contributes to cost reducing of manufacturing and pollution reducing of the paint slag to the environment.

Description

technical field [0001] The invention is a method for preparing paint from recovered waste paint slag. Background technique [0002] Waste paint slag is produced during paint spraying, which not only causes a lot of waste, but also affects the surrounding environment. Contents of the invention [0003] The purpose of the present invention is to disclose a method for preparing paint by utilizing recovered waste paint slag. [0004] The present invention includes the following steps: removing impurities from fresh paint slag, this step can roughly remove larger impurities in paint slag, for example, impurities such as cotton yarn and paper scraps can be picked out manually. After removing impurities, the paint slag obtained is added to a solvent that can dissolve the paint (such as aromatic hydrocarbons or solvent naphtha or alcohol ether solvents) to dissolve the paint slag; the solution is filtered and then dehydrated; Mix resins for encapsulation and film-forming, then a...

Claims

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Application Information

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IPC IPC(8): C09D167/04C09D115/02C09D157/02C09D201/00
Inventor 刘成强林连华刘爱萍池建美徐海港范文衡姚红蕾冯天国
Owner 山东时风(集团)有限责任公司
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