Water-soluble paint peeling agent and paint peeling method

Abstract

The invention discloses a water-soluble paint peeling agent. The water-soluble paint peeling agent comprises 5 to 60wt percent of a paint peeling main agent, 5 to 30wt percent of a solubilizing assistant, 3 to 15wt percent of a penetrant, 3 to 5wt percent of a dispersant, 1 to 5wt percent of a surfactant, and water for the surplus. The water-soluble paint peeling agent is high in paint peeling speed, can rapidly remove electrophoretic paint films on the surfaces of work pieces, does not corrode the work pieces, does not contain toxic and harmful substance, has little toxicity to human body, guarantees the personal safety of operating personnel, and ensures that waste water subjected to paint peeling is simple to treat and environmentally friendly.

Description

technical field

[0001] The invention relates to the technical field of automobile surface treatment, in particular to a water-soluble paint stripper. The invention also relates to a paint stripping method. Background technique

[0002] With the vigorous development of the automobile industry, people have increasingly strict requirements on the appearance of automobiles. Not only do they require the surface of the automobile to have good weather resistance, light resistance, and corrosion resistance, but they also require the surface of the automobile to maintain its luster for a long time. In the middle and high-end automobile industry, the surface of a series of aluminum appearance parts such as automobile signs, pedals, fenders, decorative strips, water cut strips, tripods, luggage racks, door handles, and central control panels needs to deposit a layer of electrophoresis. paint film. In the process of depositing a layer of paint film, the clamps (tools) used for loadi...

Examples

Embodiment 1

[0034] Preparation of water-soluble paint remover

[0035] Sulfuric acid (98%) 60g

[0036] Thiourea 5g

[0037] Sorbitol 5g

[0038] Ethanol (99%) 5g

[0039] Sodium tripolyphosphate 3g

[0040] Fatty alcohol polyoxyethylene ether 2g

[0041] water 20g

[0042] Water, sulfuric acid, thiourea, sorbitol, ethanol, sodium tripolyphosphate, and fatty alcohol polyoxyethylene ether are sequentially added into the stirring tank, and the water-soluble paint remover is obtained after stirring evenly.

[0043] Paint stripping experiment

[0044] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.

Embodiment 2

[0046] Preparation of water-soluble paint remover

[0047] Sulfuric acid (98%) 50g

[0048] Phosphoric acid (85%) 10g

[0049] Thiourea 5g

[0050] Sorbitol 15g

[0051] Ethanol (99%) 3g

[0052] Sodium tripolyphosphate 3g

[0053] Fatty alcohol polyoxyethylene ether 1g

[0054] water 13g

[0055] Add water, sulfuric acid, phosphoric acid, thiourea, sorbitol, ethanol, sodium tripolyphosphate, fatty alcohol polyoxyethylene ether into the mixing tank in sequence, and stir evenly to obtain a water-soluble paint remover.

[0056] Paint stripping experiment

[0057] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.

Embodiment 3

[0059] Preparation of water-soluble paint remover

[0060] Phosphoric acid (85%) 5g

[0061] Thiourea 5g

[0062] Dimethyl sulfoxide 30g

[0063] Ethanol (99%) 15g

[0064] Sodium tripolyphosphate 3g

[0065] Fatty alcohol polyoxyethylene ether 5g

[0066] water 37g

[0067] Add water, sulfuric acid, phosphoric acid, thiourea, dimethyl sulfoxide, ethanol, sodium tripolyphosphate, fatty alcohol polyoxyethylene ether in turn into the mixing tank, and stir well to obtain a water-soluble paint remover.

[0068] Paint stripping experiment

[0069] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.

technical field

[0001] The invention relates to the technical field of automobile surface treatment, in particular to a water-soluble paint stripper. The invention also relates to a paint stripping method. Background technique

[0002] With the vigorous development of the automobile industry, people have increasingly strict requirements on the appearance of automobiles. Not only do they require the surface of the automobile to have good weather resistance, light resistance, and corrosion resistance, but they also require the surface of the automobile to maintain its luster for a long time. In the middle and high-end automobile industry, the surface of a series of aluminum appearance parts such as automobile signs, pedals, fenders, decorative strips, water cut strips, tripods, luggage racks, door handles, and central control panels needs to deposit a layer of electrophoresis. paint film. In the process of depositing a layer of paint film, the clamps (tools) used for loadi...

Examples

Embodiment 1

[0034] Preparation of water-soluble paint remover

[0035] Sulfuric acid (98%) 60g

[0036] Thiourea 5g

[0037] Sorbitol 5g

[0038] Ethanol (99%) 5g

[0039] Sodium tripolyphosphate 3g

[0040] Fatty alcohol polyoxyethylene ether 2g

[0041] water 20g

[0042] Water, sulfuric acid, thiourea, sorbitol, ethanol, sodium tripolyphosphate, and fatty alcohol polyoxyethylene ether are sequentially added into the stirring tank, and the water-soluble paint remover is obtained after stirring evenly.

[0043] Paint stripping experiment

[0044] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.

Embodiment 2

[0046] Preparation of water-soluble paint remover

[0047] Sulfuric acid (98%) 50g

[0048] Phosphoric acid (85%) 10g

[0049] Thiourea 5g

[0050] Sorbitol 15g

[0051] Ethanol (99%) 3g

[0052] Sodium tripolyphosphate 3g

[0053] Fatty alcohol polyoxyethylene ether 1g

[0054] water 13g

[0055] Add water, sulfuric acid, phosphoric acid, thiourea, sorbitol, ethanol, sodium tripolyphosphate, fatty alcohol polyoxyethylene ether into the mixing tank in sequence, and stir evenly to obtain a water-soluble paint remover.

[0056] Paint stripping experiment

[0057] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.

Embodiment 3

[0059] Preparation of water-soluble paint remover

[0060] Phosphoric acid (85%) 5g

[0061] Thiourea 5g

[0062] Dimethyl sulfoxide 30g

[0063] Ethanol (99%) 15g

[0064] Sodium tripolyphosphate 3g

[0065] Fatty alcohol polyoxyethylene ether 5g

[0066] water 37g

[0067] Add water, sulfuric acid, phosphoric acid, thiourea, dimethyl sulfoxide, ethanol, sodium tripolyphosphate, fatty alcohol polyoxyethylene ether in turn into the mixing tank, and stir well to obtain a water-soluble paint remover.

[0068] Paint stripping experiment

[0069] Submerge the workpiece to be stripped into a paint stripping tank containing a water-soluble paint stripper. The temperature of the water-soluble paint stripper is 80°C. Take it out after 3 minutes. Put the stripped workpiece into the water washing tank for countercurrent flow Rinse, the rinsing time is 3min, after taking it out, wipe it clean, dry it, and observe the surface characteristics of the workpiece.