Min.Order Quantity: 30 Ton
Port: Shanghai
Payment Terms: T/T
Phenolic resin, originally colorless or yellow-brown transparent substance, is often sold in the market with colorants and is in red, yellow, black, green, brown, blue and other colors, in the form of granules or powder. It is resistant to weak acids and alkalis, decomposes in strong acids and corrodes in strong alkalis. Insoluble in water, soluble in acetone, alcohol and other organic solvents. It is obtained by condensation polymerization of phenolic aldehyde or its derivatives.
1、Phenolic Resins for Friction Materials
2、Tire rubber resins
3、Phenolic resins for cemented abrasives
4、Phenolic resins for bamboo and wood materials
5、Phenolic Resins for Oilfield
6、Phenolic resins for molding compounds
7、Phenolic resins for impregnated materials
8、Resins for coating industry
9、Phenolic resins for thermal insulation materials
10、Phenolic resins for coated abrasives
The solid phenolic resin is yellow, transparent, amorphous block material, slightly red due to the presence of free phenol. The specific gravity of the solid is about 1.7. It is soluble in alcohol, insoluble in water, and stable to water, weak acid and weak alkali solutions. The resin is prepared by condensation of phenol and formaldehyde under catalyst conditions, neutralization and washing. Due to different catalysts, they can be divided into 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.
Liquid phenolic resin is yellow and dark brown liquid. For example, alkaline phenolic resin is mainly used as casting binder.
High temperature performance: The most important feature of phenolic resin is its high temperature resistance. Even at very high temperatures, it can maintain its structural integrity and dimensional stability. It is for this reason that phenolic resin has been applied to some high-temperature fields, such as refractory materials, friction materials, adhesives and casting industry.
Bond strength: An important application of phenolic resin is as a binder. Phenolic resin is a multifunctional material that can be compatible with various organic and inorganic fillers. The phenolic resin with correct design has a very fast wetting speed. After crosslinking, 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 substances to provide them with mechanical strength and electrical properties. Typical examples include electrical insulation and mechanical lamination manufacturing, clutch discs and filter paper for automotive filters.
High carbon residue rate: under the inert gas condition with the temperature of about 1000 ℃, the phenolic resin will produce high carbon residue, which is conducive to maintaining the structural stability of the 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 system has the advantage of low smoke and low toxicity. In the case of combustion, the phenolic resin system produced by scientific formula will slowly decompose to produce hydrogen, hydrocarbons, water vapor and carbon oxides. The smoke produced in the decomposition process is relatively small and the toxicity is relatively low. These characteristics make phenolic resin suitable for public transportation and fields with very strict safety requirements, such as mining, protective fence and construction industry.
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 sanitary appliances, drinking water purification equipment (phenolic carbon fiber), bakelite tea trays and tea sets, and is widely used in food and beverage packaging materials such as cans and cans (national standard GB 05009.069-2003), liquid containers, etc.
Heat treatment: heat treatment will increase the glass transition temperature of the cured resin and further improve the performance of the resin. The glass transition temperature is similar to the melting state of crystalline solid 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 to promote the further reaction, and 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 resin post-treatment will depend on the initial curing conditions and resin system of the resin.
Foaming property: phenolic foam is a kind of foam plastic obtained by foaming phenolic resin. Compared with polystyrene foam, PVC foam, polyurethane foam and other materials that dominated the market in the early days, it has special excellent performance in flame retardancy. It is light in weight, large in rigidity, good in dimensional stability, resistant to chemical corrosion, good in heat resistance, flame retardant, self-extinguishing, low in smoke, resistant to flame penetration, free from falling objects in case of fire, and low in price. It is an ideal insulation and thermal insulation material for electrical appliances, instruments, construction, petrochemical and other industries, so it is widely valued by people.
Phenolic foam has become one of the fastest growing varieties of foam plastics. The consumption has been increasing, the scope of application has been expanding, and research and development at home and abroad are quite active. However, the biggest weakness of phenolic foam is its brittleness and high porosity, so improving its toughness is the key technology to improve the performance of phenolic foam.
1. Making adhesives, bakelite powder, electrical appliances, fishing rods, plywood, wood laminate, etc.
2. It is used as a tackifier for neoprene adhesive and curing agent for butyl rubber. Store in a cool and ventilated warehouse, away from kindling and heat source.
3. Insulated structural parts for telecommunications, instruments and traffic electrical appliances with high dielectric properties
4. Used for manufacturing bottle caps and buttons, insulating structural parts of low-voltage electrical appliances for daily use, insulating structural parts and instrument shells of low-voltage electrical appliances, low-voltage electrical appliances used in hot and humid areas, etc
5. With outstanding water resistance, stability and self-lubrication, it is used for self-lubricating bearings, gas meter elements, and molded products of water pump housing impeller
6. Used for manufacturing parts and low-voltage electrical parts of electromechanical, instrument, textile, chemical and other departments
7. Used for making insulating structural parts of low-voltage electrical apparatus
8. Mainly used in daily products, mechanical parts, insulating parts of daily electrical appliances, high and low voltage electrical parts, traffic electrical equipment, radio parts and television parts
9. For coating industry
10. For wood bonding
11. Used for making general electrical structural parts
12. Used for gas meter parts
13. It is mainly used to manufacture accessories and electrical accessories for electromechanical, instrument, telecommunication, aviation and automobile industries with metal inserts and high electrical insulation requirements
14. Under normal temperature, using p-toluenesulfonic acid as curing agent can self-harden, using urotropine as curing agent can also be used as hot-core box resin
15. Used for manufacturing insulated structural parts such as low-voltage electrical appliances and instruments
16. Used for manufacturing heat-resistant, high-strength mechanical transmission parts, electrical structure parts, etc
17. Suitable for manufacturing low-voltage electrical appliances, instrument insulation parts, etc
18. Used for manufacturing insulating structural parts of electronic products
19. Used for making hydraulic pump bearings
20. Used as raw material of phenolic plastics, making adhesives, anti-corrosion coatings, etc
21. It can be applied to cast iron, nodular cast iron, cast steel, and also to coated sand for shell core of non-ferrous metal castings
22. Used for making electrical appliances, bakelite and other plastic products
23. It is mainly used for manufacturing quick-drying coating, also for manufacturing coated sand, and for shell mold (core) casting of cast steel and cast iron
24. Used in paint, ink and other industries
25. Used for insulating parts of electrical appliances, instrument shells, large and small air switches, contact switches, etc
26. Shell and handle for pressing or injecting electric appliances, instruments, aluminum pots, etc
27. Used for making electrical insulating paint, radio components, laminated materials, fiberglass, paint, etc
28. It is mainly used for shell mold (core) casting of aluminum castings with good collapsibility
29. Used for making solid core potentiometer base
30. Used for making electrical parts of electromechanical, instrument, textile, chemical and other departments
31. Used for manufacturing low-voltage electromechanical and instrument parts
32. It is used as the raw material of electric appliance shell and daily-use bakelite powder, as well as the bonding of grinding wheel, light bulb, bamboo and wood ware
33. For wood processing
34. Suitable for manufacturing daily necessities and insulation structural parts of low-voltage electrical appliances and instruments by molding
35. Adhesive used for making laminate and glass fiber reinforced plastics
36. Oil industry as mud treatment agent
37. It is used for manufacturing various high-strength and water-resistant plywood, wood laminate and fiberboard
38. It is mainly used for the manufacture of refractory magnesia-carbon bricks, with high strength and good processability
39. Used to produce high-strength materials, electrical components, etc
40. Used as raw materials for phenolic molding powder, anticorrosive paint, adhesive, bakelite products, etc
41. Used as bonding agent for friction materials, molds and molded plastics
42. Used for manufacturing insulation structural parts of low-voltage electrical appliances, instruments and textile industry
43. Used for bonding wood and bamboo products, light bulbs, grinding wheels, etc
44. Used for preparing coatings, adhesives, acid-resistant mastic and phenolic plastics, etc
45. Used for making phenolic adhesive, paint and electrical equipment
46. Used for making insulating structural parts of heat-resistant low-voltage electrical apparatus
47. Used for manufacturing heat-resistant low-voltage electrical insulation structural parts
48. Used for manufacturing bearings and sealing rings of submersible pumps
49. For casting industry
50. Suitable for making bottle caps, buttons and other daily necessities
51. For printing industry
52. Used for pressing various glass fiber reinforced plastic products
53. Used for making ink, paint, rubber, insulating materials, etc
54. It is mainly used for manufacturing water resistant plywood, fiberboard, laminate, garment board, furniture, etc., as well as bonding of porous materials such as glass fiber laminate, foam plastic, and sand mold bonding for casting.
The common raw materials for production methods are phenol, resorcinol, m-cresol, xylenol, p-tert-butyl or p-phenylphenol, formaldehyde, furfural, etc. The production process includes two steps: polycondensation and dehydration. Put the raw material into the reactor according to the formula and mix it evenly, add catalyst, stir it, heat it to 55~65 ℃, and the reaction heat will make the material automatically rise to boiling. After that, continue to heat and keep micro-boiling (96~98 ℃) to the end point, and then discharge after decompression and dehydration. A new process for continuous polycondensation of phenolic resin was successfully developed. The main factors affecting the synthesis and performance of the resin are the chemical structure of phenol and aldehyde, the molar ratio and the pH of the reaction medium. When the molar ratio of phenol to aldehyde is greater than or equal to 1, the initial product is 1-hydroxymethylphenol, and linear resin is formed during polycondensation; When it is less than 1, polyhydroxymethylphenol derivatives are generated, and the formed polycondensation resin can be crosslinked and cured. When the pH of the reaction medium is less than 7, the generated hydroxymethylphenol is very unstable and easy to condense into linear resin; When pH is greater than 7, the polycondensation is slow, which is conducive to the formation of polyhydroxymethylphenol derivatives. In the production of thermoplastic phenolic resin, hydrochloric acid, phosphoric acid and oxalic acid are commonly used as catalysts (see acid-base catalysts) to make the medium pH 0.5~1.5. To avoid violent boiling, the catalyst can be added in several times. The boiling reaction time is generally 3~6h. Dehydration can be carried out under normal pressure or reduced pressure. The final dehydration temperature is 140~160 ℃, and the molecular weight of resin is 500~900. Sodium hydroxide, barium hydroxide, ammonia and zinc oxide can be used as catalysts for the production of thermosetting phenolic resin. The boiling reaction time is 1~3h, the dehydration temperature is generally not more than 90 ℃, and the molecular weight of the resin is 500~1000. The strong base catalyst is beneficial to increase the hydroxymethyl content of the resin and its solubility with water. The ammonia catalyst can directly participate in the resinification reaction. The resin prepared with the same formula has high molecular weight and poor water solubility. Zinc oxide catalyst can produce phenolic resin with high ortho structure and good storage stability.
| Nature of inquiries | Department | Location | Telephone | |
|---|---|---|---|---|
| Sales/distribution | China Phenolic Resin Sales Company | China | +86-19117288062 | service@skychemwin.com |
Chemwin can provide a wide range of bulk hydrocarbons and chemical solvents for industrial customers.
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