News Details
Wood coatings crosslinking agent
2017-3-23 10:57:04
Wood coatings crosslinking agent, paint is a kind of furniture raw materials, to furniture surface decoration, enhance the grade of furniture plays an important role.
Apparent performance of paint: paint the apparent performance refers to the general can more intuitive feel, such as paint, flow resistance characteristics of flowing property, drying, sanding, such as the accuracy of color performance.
The cause of the paint do:
(1) in paint or the coated surfaces containing water, alcohol, oil or wax, such as foreign body, cause the crosslinking agent consumption;
(2) or crosslinking agent additive quantity is not enough;
(3) or temperature is too low.
Prevention and control, and the solution:
1) choose the specified diluent (not water, alcohol, acid). Especially banana oil, contains a lot of alcohol solvent, will be to burn a lot of crosslinking agent, and now there are still a lot of medium and small furniture factory don't choose the diluent of form a complete set, especially when as a primer, often result in a primer, sometimes, the surface has dried up, but in fact the same as crosslinking agent, is used up by the large amounts of alcohol solvent resin is not a good crosslinking, hardness is not enough, the result is a primer grinding adhering sand paper or easy to wear, the coating or surface coating, there will be a bit late, foaming, poor poor fullness, hardness, adhesion, such as faults;
(2) according to the proportion of added crosslinking agent;
(3) when the room temperature is below 5 ℃, PU paint dry slowly.
Internal performance of paint: paint internal performance evaluation, are the important indexes of the paint quality.
Viscosity index: viscosity with temperature changes and there will be a bigger change, so the viscosity difference in winter and summer rainy season, sometimes this is not the paint quality is not stable, it is often some furniture manufacturer to paint a myth.
2. No volatile content indicators: also known as solid content, the index is the only indicator to evaluate the paint contains effective ingredients. There is a misunderstanding in the furniture industry, the higher the viscosity of paint, the more cost-effective, against the water, the more that day and not to think about the effective ingredients of paint. In fact, the paint in the blending of water eventually will all that day to evaporate into the air, but not retained in the surface of workpiece, blending of water, the more that day, in fact, the greater the waste, and seriously affect the environment. Therefore, low viscosity and high solid paint is the development of furniture industry mainstream.
3. Hardness: hardness is divided into 6 H, 5 H, 4 h3h, 2 H, H, F, HB, 2 B, 3 B, 4 B, 5 B, 6 B, 14 grades, such as ordinary film hardness generally somewhere between B - between 3 H, film hardness, high and low is just paint film performance of a simple indicator, not higher hardness must be good.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
4. Adhesion: is the paint adhesion and base material of the degree of important symbol, is also a furniture paint will drop in the process of long-term use of characterization.
5. Warp sex: it is an important indicator of toughness characterization of film. Film flexibility is furniture during the process of long-term use without cracking, stripping the characterization of index.
6. Impact resistance, toughness and characterization of film is an important indicator. The index of metallic paint meaning particularly evident, impact resistance, the better, the paint film is not easy to under the condition of impact, delamination phenomenon appear white.
7. Cold tolerance: refers to the film under the condition of low temperature of cold resistance ability. The performance is to determine whether the furniture can be used in mainland China the northern winter cold area such as a prerequisite.
8. Heat resistance: this is to ensure that performance on the film under the condition of using the heating requirements for hot water, daily necessities, such as the teapot.
9. Degeneration of heat-resistant: this index is a higher realm of paint film requirements. Only can withstand hot and cold cycling test, the film to get the basic conditions of safely use in almost any climate.
10. Yellow degeneration resistance: it is to film in use process to the characterization of colour retention index, commonly used color difference before and after UV lamp or sun, to the extent of the quantitative characterization of discoloration. Color difference is smaller, the colour, design reasonable film have smaller color change under test conditions.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Apparent performance of paint: paint the apparent performance refers to the general can more intuitive feel, such as paint, flow resistance characteristics of flowing property, drying, sanding, such as the accuracy of color performance.
The cause of the paint do:
(1) in paint or the coated surfaces containing water, alcohol, oil or wax, such as foreign body, cause the crosslinking agent consumption;
(2) or crosslinking agent additive quantity is not enough;
(3) or temperature is too low.
Prevention and control, and the solution:
1) choose the specified diluent (not water, alcohol, acid). Especially banana oil, contains a lot of alcohol solvent, will be to burn a lot of crosslinking agent, and now there are still a lot of medium and small furniture factory don't choose the diluent of form a complete set, especially when as a primer, often result in a primer, sometimes, the surface has dried up, but in fact the same as crosslinking agent, is used up by the large amounts of alcohol solvent resin is not a good crosslinking, hardness is not enough, the result is a primer grinding adhering sand paper or easy to wear, the coating or surface coating, there will be a bit late, foaming, poor poor fullness, hardness, adhesion, such as faults;
(2) according to the proportion of added crosslinking agent;
(3) when the room temperature is below 5 ℃, PU paint dry slowly.
Internal performance of paint: paint internal performance evaluation, are the important indexes of the paint quality.
Viscosity index: viscosity with temperature changes and there will be a bigger change, so the viscosity difference in winter and summer rainy season, sometimes this is not the paint quality is not stable, it is often some furniture manufacturer to paint a myth.
2. No volatile content indicators: also known as solid content, the index is the only indicator to evaluate the paint contains effective ingredients. There is a misunderstanding in the furniture industry, the higher the viscosity of paint, the more cost-effective, against the water, the more that day and not to think about the effective ingredients of paint. In fact, the paint in the blending of water eventually will all that day to evaporate into the air, but not retained in the surface of workpiece, blending of water, the more that day, in fact, the greater the waste, and seriously affect the environment. Therefore, low viscosity and high solid paint is the development of furniture industry mainstream.
3. Hardness: hardness is divided into 6 H, 5 H, 4 h3h, 2 H, H, F, HB, 2 B, 3 B, 4 B, 5 B, 6 B, 14 grades, such as ordinary film hardness generally somewhere between B - between 3 H, film hardness, high and low is just paint film performance of a simple indicator, not higher hardness must be good.
Chinese name: Diethyl toluene diamine(DETDA)
Diethyltoluenediamine Raw material ：
TDA industrial, Sichuan production
Ethylene (Et) polymer grade, Shanghai production
TEA industrial imports
A reagent grade additives
4. Adhesion: is the paint adhesion and base material of the degree of important symbol, is also a furniture paint will drop in the process of long-term use of characterization.
5. Warp sex: it is an important indicator of toughness characterization of film. Film flexibility is furniture during the process of long-term use without cracking, stripping the characterization of index.
6. Impact resistance, toughness and characterization of film is an important indicator. The index of metallic paint meaning particularly evident, impact resistance, the better, the paint film is not easy to under the condition of impact, delamination phenomenon appear white.
7. Cold tolerance: refers to the film under the condition of low temperature of cold resistance ability. The performance is to determine whether the furniture can be used in mainland China the northern winter cold area such as a prerequisite.
8. Heat resistance: this is to ensure that performance on the film under the condition of using the heating requirements for hot water, daily necessities, such as the teapot.
9. Degeneration of heat-resistant: this index is a higher realm of paint film requirements. Only can withstand hot and cold cycling test, the film to get the basic conditions of safely use in almost any climate.
10. Yellow degeneration resistance: it is to film in use process to the characterization of colour retention index, commonly used color difference before and after UV lamp or sun, to the extent of the quantitative characterization of discoloration. Color difference is smaller, the colour, design reasonable film have smaller color change under test conditions.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
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