[China Button Trading Network] The high temperature performance of urea buttons, and their strong hardness are all derived from its own manufacturing materials. He mainly includes linear phenols
Processed from materials such as aldehyde resins, thermosetting phenolic resins and oil-soluble phenolic resins.
Phenolic resin is also called bakelite, also known as bakelite powder. Originally a colorless or brownish transparent material, marketers tend to add colorants and appear red, yellow, black, green,
Brown, blue and other colors, there are particles, powder. Resistant to weak acids and weak bases, the case of strong acid decomposition occurs, the case of strong alkali corrosion. Insoluble in water, soluble in C
In ketones, alcohols and other organic solvents. Phenol and formaldehyde polycondensation derived. It includes: novolacs, thermosetting phenolic resins and oil-soluble phenolic trees
fat. Mainly used in the production of pressure plastic powder, laminated plastics; manufacture of varnish or insulation, corrosion-resistant coatings; manufacturing of daily necessities, decorations;
Thermal materials and so on. Common high-voltage electrical sockets, furniture, plastic handles, etc. Phenolic resin laminate phenolic resin, referred to as PF, phenolic resin is yellow,
through
Bright and amorphous bulk materials, which are reddish due to the presence of free molecules, have a specific gravity of 1.25 to 1.30, are easily soluble in alcohol, are insoluble in water, and are weak in water, weak acids and weak acids.
The alkali solution is stable. Resin made by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization, and water washing. Due to the choice of catalyst, it can be divided
Two types of thermosetting and thermoplastic. Phenolic resin has good acid resistance, mechanical properties, heat resistance, widely used in anti-corrosion engineering, plastic
Adhesives, flame retardant materials, abrasive wheel manufacturing and other industries. Phenol-formaldehyde resin is the earliest industrialized synthetic resin.
The most important characteristic of the high-temperature properties phenolic resin is its high temperature resistance, which maintains its structural integrity and size even at very high temperatures.
stability. For this reason, phenolic resins are used in a number of high temperature applications such as refractories, friction materials, adhesives and foundry lines.
industry. Phenolic resin refractories bonding strength
An important application of phenolic resin is as a binder. Phenolic resin is a versatile, compatible with a wide variety of organic and inorganic fillers
The substance. The correct phenolic resin is designed to have a particularly fast wetting speed. And after cross-linking, it can be abrasives, refractories, friction materials and Bakelite
The required mechanical strength, heat resistance and electrical properties of the powder.
Water-soluble phenolic resins or alcohol-soluble phenolic resins are used to impregnate paper, cotton, glass, asbestos, and other similar materials to provide them with mechanical strength
Degree, electrical properties, etc. Typical examples include electrical insulation and mechanical lamination, clutch plates and filter paper for automotive filters. High residual carbon rate at high temperatures
At about 1000°C under inert gas conditions, the phenolic resin produces a very high level of residual carbon, which helps to maintain the structural stability of the phenolic resin. Phenolic tree
This characteristic of grease is also an important reason why it can be used in the field of refractory materials. Low smoke, low toxicity compared to other resin systems, phenolic resin system
With low smoke and low toxicity advantages. In the case of combustion, phenolic resin systems produced with scientific formulations will slowly decompose to produce hydrogen, hydrocarbons
Compounds, water vapor and carbon oxides.
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