Phenolic resin an important part in producing plastics, coatings, adhesives and synthetic fibers

Phenolic resin, also known as Bakelite, was originally a colorless or yellowish brown transparent substance. It is resistant to weak acids and weak bases. It will decompose in strong acid and corrode in strong alkali. Insoluble in water, soluble in organic solvents such as acetone and alcohol. It is obtained by condensation polymerization of phenol aldehyde or its derivatives. Below is its characteristics:

-Bond strength

An important application of phenolic resin is as a binder. Phenolic resin is a kind of multifunctional, compatible with various organic and inorganic fillers. The properly designed phenolic resin has a very fast wetting speed. And after cross-linking, it can provide the required mechanical strength, heat resistance and electrical properties for abrasive tools, refractory materials, friction materials and bakelite powder.

Water-soluble phenolic resin or alcohol-soluble phenolic resin is used to impregnate paper, cotton cloth, glass, asbestos and other similar materials to provide them with mechanical strength, electrical properties, etc. Typical examples include electrical insulation and mechanical lamination manufacturing, clutch plates and filter paper for automotive filters.

-High residual carbon rate

Under inert gas conditions at a temperature of about 1000°C, phenolic resin will generate high residual carbon, which is beneficial to maintain the structural stability of phenolic resin. This characteristic of phenolic resin is also an important reason why it can be used in the field of refractory materials.

-Low smoke and low toxicity

Compared with other resin systems, phenolic resin systems have the advantages of low smoke and low toxicity. In the case of combustion, the phenolic resin system produced with a scientific formula will slowly decompose to produce hydrogen, hydrocarbons, water vapor and carbon oxides. The smoke produced during the decomposition process is relatively small and the toxicity is relatively low. These characteristics make phenolic resin suitable for public transportation and areas with very strict safety requirements, such as mines, fences and construction.

-Chemical resistance

The cross-linked phenolic resin can resist the decomposition of any chemical substances. Such as gasoline, petroleum, alcohol, glycol, grease and various hydrocarbons. Due to its chemical stability, it is suitable for making kitchen and bathroom appliances, drinking water purification equipment (phenolic carbon fiber), bakelite tea tray and tea set, and widely used in cans and cans (national standard GB 05009.069-2003), liquid containers and other food and beverages In the packaging materials.

-Heat treatment

Heat treatment will increase the glass transition temperature of the cured resin, which can further improve the performance of the resin. The glass transition temperature is similar to the molten state of crystalline solids such as polypropylene. The initial glass transition temperature of phenolic resin is related to the curing temperature used in the initial curing stage. The heat treatment process can improve the fluidity of the cross-linked resin and promote the reaction to take place. At the same time, it can also remove the residual volatile phenol, reduce shrinkage, enhance dimensional stability, hardness and high temperature strength. At the same time, the resin also tends to shrink and become brittle. The temperature rise curve of the resin post-treatment will depend on the initial curing conditions of the resin and the resin system.

-Foaming

Phenolic foam is a foamed plastic obtained by foaming phenolic resin. Compared with materials such as polystyrene foam, polyvinyl chloride foam and polyurethane foam, which dominated the market in the early days, it has special excellent properties in terms of flame retardancy. Its light weight, high rigidity, good dimensional stability, chemical corrosion resistance, good heat resistance, flame retardant, self-extinguishing, low smoke, flame penetration resistance, no spillage in fire, low price, is suitable for electrical appliances, meters, buildings , Petrochemical and other industries are more ideal insulation materials, so they have received extensive attention.

Phenolic foam has become one of the fastest growing types of foam plastics. Consumption continues to grow, the scope of application continues to expand, and research and development at home and abroad are quite active. However, the biggest weakness of phenolic foam is its brittleness and high open cell ratio. Therefore, improving its toughness is the key technology to improve the performance of phenolic foam.

These years phenolic resin is used as a bonding agent for diamond coated abrasives. The method of use is as follows: The new phenolic resin is mixed with phenolic resin in a ratio of 1:3, which not only improves the strength of the phenolic resin, but also improves the heat resistance and grinding ratio. If the new phenolic resin is used alone, the life of the grinding wheel is 8 times that of the phenolic resin, and the strength of the production process is about 30% higher than that of the phenolic resin product, and the grinding effect is also improved.

Regional Sales Manager

Zhejiang Ruico Advanced Materials Co., Ltd. (Stock No.873233)

Add: No.188, Liangshan Road, Linghu Town, Nanxun District, Huzhou City, Zhejiang Province, China 313018

Phone: +86 (572) 2903236

Fax: +86 (572) 2905222

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Cellphone: +86 15968208672

Website:www.ruicoglobal.com

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