What is Phenolic Resin? Phenolic resin uses

1. Phenolic resin is also called bakelite, also known as bakelite powder. It is originally a colorless or yellow-brown transparent substance, and the market sales are often red, yellow, black, green, brown, blue and other colors with colorants, and there are granules and powders. It is resistant to weak acids and alkalis, decomposes in case of strong acids, and corrodes in case of strong alkalis.

Insoluble in water, soluble in acetone, alcohol and other organic solvents. Phenolic or its derivatives are obtained by polycondensation.

2. Properties: 1. Solid phenolic resin is a yellow, transparent, amorphous lumpy substance, reddish because it contains free phenols, the specific gravity of the entity is about average, soluble in alcohol, insoluble in water, stable to water, weak acid and weak alkali solution. A resin made of phenol and formaldehyde under catalyst conditions by polycondensation, neutralization, and water washing.

Due to the different catalysts selected, they can be divided into two categories: thermosetting and thermoplastic. Phenolic resin has good acid resistance, mechanical properties and heat resistance, and is widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries.

2. Liquid phenolic resin is yellow and dark brown liquid, such as: alkaline phenolic resin is mainly used as casting binder.

Phenolic resin is formaldehyde (or paraformaldehyde) and 2 3 functional phenol and its derivatives by addition and condensation, due to the difference in raw materials, catalyst types and reaction conditions, a series of resins with different properties can be obtained. It is widely used in coatings, furniture, ships, anti-corrosion and other fields.

The chemical reaction of phenolic resins can be divided into three stages.

The first stage: the resin is a mixture of low-molecular compounds, which can be melted when heated, and can be soluble in acetone, alcohol and strong alkaline aqueous solution, called soluble phenolic resin, also called order A or order A phenolic resin.

The second stage is the result of further reaction of the soluble phenolic resin, which is called the coagulable phenolic resin. It is a non-melting and insoluble polymer substance, as well as a mixture of soluble phenolic resins containing some free phenols and hydroxymethyl phenols.

The difference with alpha phenolic resin is that it is only partially dissolved in acetone and alcohols, and at the same time, the resin expands and increases in volume, and becomes a brittle substance after cooling and is easy to crush into powder.

The third stage is the product of the resin after curing, usually called the cured phenolic resin. It has high mechanical strength and electrical insulating properties, and is insoluble in organic solvents.

Phenolic resin can be made into phenolic glue, phenolic fiber, anti-corrosion materials, thermal insulation materials, and compression powder.

1. Phenolic glue: mainly used in the bonding of plywood and precision casting sand mold of building materials plates.

2. Phenolic fiber: If the phenolic resin of thermoplastic linear type is used as the basic raw material.

3. Anti-corrosion materials: mixing other items can effectively prevent corrosion, such as phenolic resin FRP, phenolic resin coatings, etc.

4. Thermal insulation materials: mainly phenolic resin foaming materials, which are widely used in air conditioning systems, lightweight thermal insulation color steel plates, etc.

5. Compression molding powder: Compression molding powder can be made into various plastic products by transfer molding, molding and injection molding.

Phenolic resin: Phenolic resin, also known as bakelite, is originally colorless or yellow-brown transparent matter, and is often sold in the market with colorants and red, yellow, black, green, brown, blue and other colors, in the form of granules or powders. It is resistant to weak acids and alkalis, decomposes in case of strong acids, and corrodes in case of strong alkalis.

Insoluble in water, soluble in acetone, alcohol and other organic solvents. It is obtained by polycondensation of phenolic aldehyde or its derivatives.

The reaction mechanism of the polycondensation reaction between formaldehyde and p-methylphenol is that the phenol removes the two hydrogen atoms on the orthosite, and the aldehyde deoxidizes to produce water.

Polycondensation is a reaction in which monomers react with each other to form polymer compounds, and at the same time form molecules (such as water, ammonia, etc.).

The chemical equation for the reaction between phenol and formaldehyde is: NC6H5OH+NHCHO (catalyst, heating) -C6H3OH)-CH2-]N-+NH2O, phenol and formaldehyde will undergo polycondensation reaction under the conditions of catalyst and heating to generate phenolic resin and water.

Characteristics of polycondensation reaction

1) The monomer does not necessarily contain unsaturated bonds, but must contain two or more reactive groups (such as -OH, -COOH, -NH2, -X, etc.).

2) As a result of the polycondensation reaction, not only polymers are formed, but also by-products (small molecules) are formed.

3) The chemical composition of the obtained polymer compound is different from that of the monomer.

The above content reference: Encyclopedia - phenolic resin.

Question 1: What is phenolic resin? What does it do?

Phenolic resin is a general term for synthetic resin formed by polycondensation of alkylphenol and formaldehydel phenol under acid-base catalysis. The appearance of phenolic resins is usually colorless or yellow to brownish-red transparent bulk solids. Soluble in water.

Soluble in organic solvents such as acetone and alcohol. Phenolic resin is resistant to weak acids and alkalis, and is easy to decompose in strong acids and corrode in strong alkalis. Phenolic resin has excellent heat resistance, wear resistance, water resistance and aging resistance, and has the characteristics of good rigidity, dimensional stability and good electrical properties.

It is widely used in the manufacture of special-purpose plastics, coatings, adhesives and acid-resistant cements.

Question 2: What color is phenolic resin The color of phenolic resin is brown transparent or translucent, it is solid or powdery, and it can be bought on the Internet.

Question 3: What is phenolic resin Phenolic resin is a chemical substance, it has many uses, it can be bought on the material network, and the quality is ***.

Question 4: What is phenolic resin, what are its characteristics and classification Characteristics of phenolic resin: it is generated by polycondensation of phenols and aldehydes; Modification method: chemical modification and physical modification. If you don't understand, send me a message.

Question 5: What is the monomer of phenolic resin Phenolic resin is also called bakelite, also known as bakelite powder. It is obtained by polycondensation of phenol and formaldehyde.

The monomers of phenolic resins are phenol and formaldehyde.

Question 6: What is phenolic resin? What does it do?

Phenolic resin is a general term for synthetic resin formed by polycondensation of alkylphenol and formaldehydel phenol under acid-base catalysis. The appearance of phenolic resins is usually colorless or yellow to brownish-red transparent bulk solids. Soluble in water.

Soluble in organic solvents such as acetone and alcohol. Phenolic resin is resistant to weak acids and alkalis, and is easy to decompose in strong acids and corrode in strong alkalis. Phenolic resin has excellent heat resistance, wear resistance, water resistance and aging resistance, and has the characteristics of good rigidity, dimensional stability and good electrical properties.

It is widely used in the manufacture of special-purpose plastics, coatings, adhesives and acid-resistant cements.

Question 7: What is phenolic resin, what are its characteristics and classifications Characteristics of phenolic resin: it is generated by polycondensation of phenols and aldehydes; Modification method: chemical modification and physical modification. If you don't understand, send me a message.

Question 8: What color is phenolic resin The color of phenolic resin is brown transparent or translucent, it is solid or powdery, and it can be bought on the Internet.

The demand for phenolic resin on the market is very large, and many products that we come into contact with in our daily life are made of phenolic resin, such as: switch plugs, sockets, etc. So, today I will talk to you in detail about what isPhenolic resin

What are the uses of phenolic resins?

What is Phenolic Resin?

Many people refer to phenolic resins as bakelite or bakelite powder. Most of the bumper bends on the market are colorless or yellow-brown smiling transparent materials, but now you can also see some red, green, brown, blue, yellow, black and other colors according to continuous creation. Phenolic resins are in powder form, granular form, etc., and will decompose when weak alkali and weak acid resistance will occur when encountering strong acid, and corrosion will occur when encountering strong alkali.

This substance is insoluble in water, but it dissolves easily in liquids such as acetone or alcohol.

Uses of phenolic resins

1. Phenolic glue: solid phenolic resin is also one of the important raw materials of phenolic glue. If it is a single phenolic resin glue, the texture is relatively brittle, and it is mainly used for the bonding of building materials and plywood and precision casting sand molds.

In addition, it is used as an adhesive based on phenolic resin modified by other polymers, so it occupies a very important position in structural adhesives.

2. Phenolic fiber: mainly based on thermoplastic linear phenolic resin as the basic raw material, through melt spinning and then soaked in hydrochloric acid and polyoxymethylene aqueous solution, so as to play a role in solidification, better obtain formaldehyde cross-linked body structure fiber products.

3. Anti-corrosion materials: there are also thermosetting phenolic resin components in the field of anti-corrosion, and the common forms are: phenolic resin fiberglass, phenolic resin coating, phenolic resin cement, phenolic-epoxy resin composite fiberglass, mortar, phenolic resin impregnated and profiled graphite products.

4. Thermal insulation materials: mainly phenolic resin foaming materials, and phenolic foam products are characterized by thermal insulation, fire prevention, light weight, heat insulation, as a new material for thermal insulation, energy saving and fire prevention. It can be widely used in the field of air conditioning systems, lightweight thermal insulation color steel plates, thermal insulation materials for chemical pipelines, housing thermal insulation and energy reduction, vehicles and ships.

5. Compression molding powder: Compression molding powder is one of the main uses for the production of phenolic resin, and compression powder can be made into various plastic products by transfer molding, molding and injection molding. Most of the thermoplastic phenolic resin compression powder is used to manufacture electrical parts such as sockets, plugs, switches, and some daily necessities in life, as well as some industrial manufacturing products.

My conclusion: Above, aboutPhenolic resinIts use performance is extensive, the market demand is large, interested friends can learn about it in many aspects!

Summary. Phenolic resins are used in the manufacture of various plastics, coatings, adhesives, synthetic fibers, etc., and are also used in electrical equipment. Phenolic resin is a kind of synthetic plastic, generally colorless or yellow-brown transparent solid, with good heat resistance, water resistance, insulation, acid resistance, alkali resistance, etc., easy to cut.

Phenolic resins are used in the manufacture of various plastics, coatings, adhesives, synthetic fibers, etc., and are also used in electrical equipment. Phenolic resin is a kind of synthetic plastic, generally colorless or yellow-brown transparent solid, with good heat resistance, water resistance, insulation, acid resistance, alkali resistance, etc., easy to cut.

This is epoxy phenolic resin paint. Yes.