Pigment paste For silicone rubber use
Silicone color paste is also called "silicone color paste" and "silicone color paste". As the name suggests, it is a pigmented concentrated paste, which belongs to silicone products. It is based on different properties of resins and users, and provides various specifications of various color pastes according to different properties and different formulas, so as to achieve the fundamental purpose of beautiful products and increase product added value.
Characteristics of silicone color paste:
1. It has excellent quality stability and dispersibility.
2. Except for a few inorganic pigments containing lead, other pigments are strictly selected with low toxicity (heavy metal content is below the standard range), which are low-toxic paste pigments that meet the requirements.
3. It has excellent quality with the characteristics of heat resistance, light resistance, migration resistance, color separation resistance, easy to fade, acid and alkali resistance, strong tinting power, and high solid content.
Application of silicone color paste:
Release agent, shock absorber oil, dielectric oil, hydraulic oil, heat transfer oil, diffusion pump oil, defoamer, lubricant, hydrophobic agent, paint additive, polishing agent, cosmetics and daily necessities additive, surfactant, particle and fiber treatment agent, silicone grease, flocculant.
Scope of application of silicone color paste industry:
1. Applicable to industry, electronics, crafts, gifts, machinery, printing, decoration, furniture, construction, lighting, transportation and other industries.
2. Applicable to PVC soft coating, dipping, micro-injection, ink, toys and other paste molding or PVC semi-rigid artificial leather and other coloring industries.
3. Printing, signs, gifts, automobiles, daily necessities, adult products, kitchen utensils, medical, wires and cables, oil mud, sculpture mud, electronic equipment and other fields.
All substances added to silicone to change the color of silicone products or rubber products are collectively referred to as silicone color pastes. The coloring of silicone products can be divided into two categories: inorganic and organic: inorganic silicone color pastes are inorganic pigments; organic silicone color pastes are organic pigments and some dyes.
The important characteristics of silicone color pastes for silicone are hue, tinting power, hiding power and dispersibility; in addition, silicone color pastes are required to have good stability and migration resistance. The stability of silicone color pastes includes thermal stability, weather resistance and chemical stability.
Silicone color paste characteristic 1: Hue
Hue refers to the brightness of silicone products after coloring.
Silicone color paste characteristic 2: Tinting power
Tinting power refers to the influence of the color of the silicone color paste itself on the entire mixed rubber. The stronger the tinting power, the greater the influence on the color of the rubber. This can reduce the amount of silicone color paste used to reduce costs. Generally speaking, the smaller the diameter of silicone color paste particles, the greater the tinting power.
Silicone color paste characteristic 3: Hiding power
Hiding power refers to the ability of silicone color paste to prevent light from penetrating silicone. In other words, hiding power is used to measure the effect of silicone color paste on the transparency of silicone. The greater the hiding power, the worse the transparency. The hiding power depends on the difference between the refractive index of silicone color paste and the refractive index of silicone. The greater the correlation, the stronger the hiding power. Inorganic silicone color paste has a large hiding power and is only suitable for transparent silicone products (the functional role of transparent and colored silicone products), while organic silicone color paste has a small hiding power and is suitable for colored transparent silicone products.
Silicone color paste characteristic 4: Dispersibility
Silicone color paste should be easy to disperse evenly in silicone. Only when silicone color paste is evenly dispersed in rubber in the form of tiny particles can an excellent coloring effect be obtained.
Silicone color paste characteristic 5: Thermal stability
Thermal stability refers to the fact that when the colored silicone rubber is heated during processing, especially when vulcanized at high temperature (130~170ºC), the silicone color paste will not decompose or change color, and it has steam resistance.
Silicone color paste characteristic 5: Weather resistance
Weather resistance refers to the resistance of silicone color paste to ozone in the atmosphere and light resistance. From an optical point of view, the shorter the wavelength of light, the more damage it will cause to the rubber during the irradiation process. From the intensity of light aging, purple light; blue light; cyan light; green light; yellow light; orange light; red light. The order of resistance to sunlight exposure is: white; jade; blue; red; purple; black.
Silicone color paste characteristic 6: Chemical stability
Chemical stability means that silicone color paste should have solvent resistance, drug resistance, acid resistance, oxidation resistance, no chemical reaction with other compounding agents in the rubber, no sulfur reaction during vulcanization, etc.
Silicone color paste characteristic 6: Migration resistance
Migration resistance mainly refers to the fact that the silicone color paste in silicone products will not be extracted by water or organic solvents and cause color bleeding. When in contact with other objects, the silicone color paste will not cause pollution to adjacent objects due to migration, and the silicone color paste will not spray out on the surface.
Introduction to silicone color paste:
According to the different properties of resins and the objects of use, various specifications of these color pastes are provided according to different properties and different formulas, so as to achieve the fundamental purpose of beautiful products and increase the added value of products. The color paste produced is a dispersible pigment. It is a pigment that uses plasticizer as the basis, matches the appropriate amount of stabilizer and dispersant, and is refined by machinery to form a high-concentration paste colorant.
Features of silicone color paste:
The color paste has excellent quality stability and dispersibility. Except for a few inorganic pigments containing lead, other pigments are strictly selected with low toxicity (heavy metal content is below the standard range), which are low-toxic paste pigments that meet the requirements. At the same time, it has excellent quality with the characteristics of heat resistance, light resistance, migration resistance, color separation resistance, easy to fade, acid and alkali resistance, strong tinting power, and high solid content.
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