The characteristics of the common coating material

The characteristics of the common coating material

Silicone rubber
Silicone rubber has developed rapidly in recent years, and it is widely used in many areas, working temperature is between -70 to 350 ℃,excellent resistance to weather and aging, the performance is stable after 10 to 20 years, and also has excellent insulation, hydrophobic, non-stick, and other excellent performance.
High-temperature vulcanized silicone rubber, which peroxide curing agent for the vulcanization of high-temperature molding varieties, the output is the largest, and the price is the lowest, the preparation of coating compound has certain requirements.
Room temperature vulcanized silicone rubber, which is divided to single-component and two-component(or multi-component room temperature vulcanization). The single component is air-tightly and moisture-tightly, and then vulcanized at room temperature. Two-component and multi-component components are mixed evenly, and then vulcanized at room temperature. The price of room temperature vulcanized silicone rubber is lower, but the coating process control is more difficult, at room temperature, the colloidal viscosity changes, it can not be coated of improper handling or even ahead of curing.
The liquid silicone rubber, also named two-component silicone rubber, this kind of rubber with good liquidity, curing fast, you can pour molding injection molding. Liquid silicone can be cured at room temperature, also can be cured at high temperature . High-temperature curing can be completed in a few seconds. It’s the ideal fiberglass fabric coating agent, with high strength, smooth appearance.

silicone Resin
Silicone resin has a high degree of cross-linked structure of the polyorganosiloxane, and with the dual characteristics of organic resin and inorganic materials, it also has a unique physical and chemical properties.
It is mainly used in electrical insulation paint, with good property of heat resistant, cold resistant, weather resistant, and waterproof. It’s also colorless, transparent with good adhesion, wear resistance and moisture-proof hydrophobic properties.

PTFE has excellent chemical stability and corrosion resistance, and it’s showing inert, strong acid and alkali resistance, water and various organic solvents for the majority of chemicals and solvents; electrical insulation and flame retardant performance, with good anti-aging ability; surface tension is small, and without attaching any material; long-term working temperature -180 to 250 ℃. PTFE coating is generally coated with PTFE emulsion impregnation and hot pressing compound with polytetrafluoroethylene film.

PVDF is semi-crystalline polymers under normal conditions, that has excellent chemical resistance, temperature resistance, discoloration and oxidation resistance; excellent wear resistance, flexibility, swelling strength and impact strength; Excellent resistance to ultraviolet radiation and high-energy radiation; good hydrophobicity. Generally, PVDF is coated with a solvent by dissolving it in an adjuvant.

Due to the flexibility of the polyacrylate polymer chain, the glass transition temperature (Tg)is low, it can form a good gloss and water-resistant film, bonded firmly, not easy to peel, flexible and flexible at room temperature,with good weather resistance , but the tensile strength is not high. Now, the research and application of modified polyacrylates are very active.
Polyacrylates are typically coated with solution or emulsion.

VAE emulsion is an abbreviation of vinyl acetate-ethylene copolymer emulsion. It is a kind of high molecular emulsion made by copolymerization of vinyl acetate and ethylene monomer as raw materials and other auxiliary materials through emulsion polymerization. Has good flexibility, alkali resistance, UV aging resistance, compatibility (easy to add a variety of additives), good adhesion and film-forming.

Polyvinyl chloride (PVC) paste resin is a branch of polyvinyl chloride resin. Because of its good paste performance, and good dispersion properties. It is suitable for coating, impregnating, spraying, foaming and other processing technology. It is widely used in artificial leather, decorative material, floor leather, wall paper, industrial conveyor belt, sports field, paint, adhesive, toy, medical disposable glove, daily decorative materials, electrical instruments and electrical tools, and many other materials and products areas. Modified polyvinyl chloride can be also applied to some areas with special requirements.

Polyurethane coating, with long history and rapid development, its advantages are: the coating is soft and flexible; good coating strength, and can be used as very thin coating; coating porous, with moisture and ventilation performance; wear-resistant, wet resistant , anti-dry cleaning. The disadvantages are: high cost; poor weather resistance; it will hydrolyzewater to meet water, heat and alkali.

Neoprene is chloroprene rubber as the main raw material for the production of synthetic rubber, and it is widely used in weathering products, viscose soles, coatings and rocket fuel.

Phenolic resin has good acid resistance, mechanical properties, heat resistance and insulation properties. Mainly used in the production of pressure plastic powder, laminated plastics, insulation materials, corrosion-resistant coatings, household decorations (soundproof, insulation materials).

Polyimide is the best overall performance of organic polymer materials, resist temperature of 400 ℃ or more, long-term working temperature is between -200 to 300 ℃, no significant melting point, but with high insulation properties. It is widely used in high temperature coating and insulation coating.

Vermiculite is a natural, non-toxic minerals, flake vermiculite can be rapidly expanded 6-20 times after high-temperature roasting, after expansion, the proportion is 60-180kg / m3, with a strong thermal insulation properties, Vermiculite coated glass fiber can improve the temperature resistance of the coated fabric significantly. Utilizing the ability of ion exchange of vermiculite, a stable suspension is prepared for coating.

Other coating
Conductive graphite coated fiberglass fabric;
Metallic oxide material coated fiberglass fabric, which can improve the temperature resistance; Nanoscale metal oxide material coated fiberglass fabric, with photocatalytic performance.
Coated with metal coating technology, can be made of a variety of functional glass fiber fabric (made of antimicrobial silver fabric, etc.)

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pdfThe technology and application of coated fiberglass fabric.pdf