Unsaturated Resin
Unsaturated Resin refers to a polymer compound containing unsaturated double bonds produced by polycondensation reaction of dibasic acid and dibasic alcohol. The earliest resin discovered by human beings was a fat-like substance extracted from the secretions of trees, such as rosin, which is the reason for the "tree" before "grease".
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Product Description

Overview

Unsaturated Resin refers to a polymer compound containing unsaturated double bonds produced by polycondensation reaction of dibasic acid and dibasic alcohol. The earliest resin discovered by human beings was a fat-like substance extracted from the secretions of trees, such as rosin, which is the reason for the "tree" before "grease".


It was not until 1906 that phenolic resin was artificially synthesized for the first time, which opened up a new era of synthetic resin. In 1942, the U.S. Rubber Company first put into production unsaturated polyester resin, and later called any unprocessed high polymer resin. But it has nothing to do with "tree" for a long time. Resins are divided into two categories: thermoplastic resins and thermosetting resins. For heating, melting, cooling and solidification, and the meltable resin that can be repeated is called thermoplastic resin. After heating and curing, it is no longer reversible and becomes a solid that neither dissolves nor melts. It is called thermosetting resin, such as phenolic resin and epoxy resin. , unsaturated polyester resin, etc.

Chinese name不饱和树脂MoldingHand lay-up process
Foreign nameUnsaturated Polyester ResinDefinitionPolymer compounds containing double bonds produced by polycondensation of dibasic acids and diols
Birth time1906Attributesthermosetting resin

Introduction

"Polyester" is a class of polymer compounds containing ester bonds that are distinguished from resins such as "phenolic" and "epoxy". This polymer compound is produced by polycondensation reaction of dibasic acid and diol, and when this polymer compound contains unsaturated double bonds, it is called unsaturated polyester. This unsaturated polyester dissolves In polymerizable monomers (usually styrene)

 

When it becomes a viscous liquid, it is called unsaturated polyester resin (English name Unsaturated Polyester Resin, UPR for short).

 

Therefore, unsaturated polyester resin can be defined as a linear polymer compound containing unsaturated dibasic acid or diol, which is formed by polycondensation of dibasic acid and dibasic alcohol, dissolved in monomer (usually styrene) and into a viscous liquid.

 

Unsaturated polyester resin, which accounts for 75% of the resins we use every day.

characteristic

Unsaturated polyester resin is a kind of thermosetting resin, which can be cured into an insoluble and infusible high molecular network polymer under the action of heat or initiator. However, the mechanical strength of this polymer is very low and cannot meet the requirements of most applications. When reinforced with glass fiber, it can become a composite material, commonly known as "glass reinforced plastic" (English name Fiber Reinforced Plastics, FRP for short). Compared with the resin casting body, the mechanical strength and other aspects of "glass fiber reinforced plastic" have been greatly improved.

 

The glass fiber reinforced plastic (UPR-FRP) based on unsaturated resin has the following characteristics:

 

Lightweight and high strength

 

The density of FRP is 1.4-2.2g/cm3, which is 4-5 times lighter than steel, but its strength is not small, and its specific strength exceeds that of steel, duralumin and fir. This is of great significance for products that need to reduce their own weight, such as aviation, aerospace, rockets, missiles, ordnance and transportation. For example, the FRP components used in the main structure of the Boeing 747 jetliner are up to 2.2 tons, which effectively saves aircraft fuel, improves the speed, prolongs the endurance time, and increases the payload.

 

Good corrosion resistance

 

UPR-FRP is a kind of good corrosion-resistant material, which can withstand common concentrations of acids, alkalis, salts, most organic solvents, sea water, air, oils, and is also highly resistant to microorganisms. It is widely used in petroleum, Chemical industry, pesticide, medicine, dyestuff, electroplating, electrolysis, smelting, light industry and other fields of national economy play an irreplaceable role of other materials.

 

Excellent electrical performance

 

UPR-FRP has excellent insulation properties and can still maintain good dielectric properties under high frequency action. It does not reflect radio waves, is not affected by electromagnetic effects, and has good microwave permeability. It is an ideal material for making radomes. Using it to manufacture instruments, motors, and insulating parts in electrical products can improve the service life and reliability of electrical appliances.

unique thermal properties

 

The thermal conductivity of UPR-FRP is 0.3-0.4Kcal/mh℃, which is only 1/100-1/1000 of that of metal. It is an excellent thermal insulation material. The doors and windows made of it are the fifth generation of new energy-saving building materials. In addition, the FRP linear expansion coefficient is also very small, which is close to that of general metal materials, so the connection between FRP and metal will not cause stress due to thermal expansion, which is conducive to its bonding with metal substrates or concrete structures.

 

Excellent processing performance

 

UPR has excellent processing performance, simple process, and can be molded at one time. It can be molded at room temperature and pressure, and can be cured under heat and pressure. In addition, no low-molecular by-products are generated during the curing process, and relatively uniform products can be produced. Due to its excellent process performance, it has been widely used in non-glass fiber reinforced materials such as handicrafts, imitation marble products, and polyester paint in recent years.

 

Good material designability

 

UPR-FRP is a composite material with UPR as the matrix and glass fiber as the reinforced aggregate. The two are processed into the final shape of the product after one-time processing. So FRP is not only a material, but also a structure. The so-called designability includes two aspects: (1) functional design; FRP products with various special functions can be made by selecting appropriate UPR and glass fibers, such as: it can be made into corrosion-resistant products; High-temperature products; can be made into light-transmitting plates; can be made into fire-resistant and flame-retardant products; FRP grating, FRP pipe, FRP tank, FRP tank, etc.

 

No material is omnipotent, and FRP is no exception. First of all, FRP has many essential differences compared with metal. For example, metal is an isotropic material, while FRP is an anisotropic material. Under stress, metal is generally divided into two stages: elastic deformation and plastic deformation, while FRP is under stress Under the action, there is generally no significant plastic deformation stage, no yield point, and there is delamination during the stress process, and it is easy to break suddenly when overloaded. Secondly, the modulus of FRP is low, which is 10 times worse than that of steel, so products with high rigidity requirements must be carefully designed. Third, the heat resistance of FRP is much lower than that of metal materials. So far, the long-term use temperature of FRP is only limited to below 200°C.

use

The use of unsaturated polyester resin

 

According to specific special varieties, it includes winding resin, spray resin, RTM resin, pultrusion resin, SMC, BMC resin, flame-retardant resin, food-grade resin, anti-corrosion resin, air-drying resin, Polaroid resin, handicraft resin, Button resin, agate resin, artificial stone resin, highly transparent resin crystal resin, putty resin, etc.

 

Anti-aging flame retardant gel coat, heat-resistant gel coat, spray gel coat, mold gel coat, non-cracking gel coat, radiation curing gel coat, high wear-resistant gel coat, etc. as FRP surface decoration.

 

According to the structure of unsaturated polyester resin, it can be divided into o-phthalic type, m-benzene type, p-phenylene type, bisphenol A type, vinyl ester type, etc.;

 

According to its performance, it can be divided into general-purpose type, anti-corrosion type, self-extinguishing type, heat-resistant type, low shrinkage type, etc.;

 

According to its main use, it can be divided into two categories: glass fiber reinforced plastic (FRP) resin and non-glass fiber reinforced plastic resin. The so-called FRP products refer to various products made of resin with glass fiber and its products as reinforcing materials, also known as glass fiber reinforced plastics (FRP or FRP for short); non-FRP products are resins mixed with inorganic fillers or used alone Various products made of fiberglass are also called non-reinforced FRP products.

 

UPR's FRP products are widely used in the following fields:

 

Construction field: Cooling towers, 8m3/h-3000m3/h cross-flow, counter-flow, spray towers and accessories such as air ducts, fans, and water eliminators. Doors, windows, light lighting buildings, grilles, mobile rooms, cold storage, park pavilions, platforms, newsstands, etc.

 

Anti-corrosion products and projects such as glass steel pipes, tanks and tanks: including large, medium and small-diameter pipes, pipe fittings, valves, storage tanks, storage tanks, grilles, filling plates, towers, chimneys, anti-corrosion floors and building anti-corrosion, etc.

 

FRP vehicles: train double-decker passenger cars and parts, window frames, car bodies, bumpers, train air ducts, spring plates, etc.

 

FRP boats: including yachts, lifeboats, traffic boats, fishing boats, speedboats, sampans, breeding boats, assault boats, etc.

 

FRP amusement equipment: including large amusement machines, large water parks, and children's playgrounds.

 

FRP transportation equipment, labor insurance and security supplies: including road signs, road signs, footbridges, lamps, cable boxes, measuring scales, helmets, kiosks, explosion-proof equipment, manhole covers, etc.

 

FRP Sanitary Equipment: Bathtub, washstand, toilet, mirror frame, overall toilet, trash can.

 

Energy-saving FRP products; including axial fans, centrifugal fans, solar water heaters, wind generators, etc.

 

FRP food containers: high-level water tanks, food transport tanks, beverage cans.

 

Fiberglass urban sculptures, fonts, handicrafts and bone crafts.

 

Fiberglass furniture: including seats, fast dining tables, complete sets of furniture, telephone booths, counters, etc.

 

FRP electromechanical, mining, light textile products: including protective covers, grilles, dry-type transformers, transformers, high-voltage pull rods, computer rooms, electrical switches, SMC satellite antennas, copper foil plates, clothing models, ventilation pipes, cotton sliver cans wait.

 

Fiberglass sports equipment and music and dance equipment: including tennis rackets, parallel bars, horizontal bars, springboards, rowing boats, props, etc.

 

The non-glass reinforced plastic application fields of UPR are roughly as follows:

 

Including crystal handicrafts, opaque various modeling handicrafts, etc.

 

Buttons: various polyester button products.

 

Artificial stone: including artificial marble, artificial agate, artificial granite, etc.

 

Coating: including furniture coating, piano, TV, radio casing, sewing machine table and bicycle varnish, etc.

 

Putty: Polyester putty for car repair, etc.

 

Others: including anchoring agent, electrical casting, toughening agent, adhesive, etc.

 

curing mechanism

From the perspective of chemical kinetics of free radical polymerization, the curing of UPR belongs to free radical copolymerization. The curing reaction has the characteristics of four radical reactions of chain initiation, chain growth, chain termination and chain transfer.

 

Chain Initiation--The process from the decomposition of a peroxide initiator to form a free radical to the addition of this free radical to an unsaturated group.

 

Chain Growth - The process by which monomers are continuously added to newly generated free radicals. The activation energy required for chain growth is much lower compared to chain initiation.

 

Chain Termination - Two free radicals combine to terminate the growing polymeric chain.

 

Chain transfer - a growing large free radical can interact with other molecules, such as solvent molecules or inhibitors, so that the original active chain disappears and becomes a stable macromolecule, while the original inactive molecule becomes a free radical.

Molding

1) Hand lay-up process;

 

2) Injection molding process;

 

3) Casting molding process;

 

4) Fixed-length winding process;

 

5) Continuous winding pipe making process;

 

6) Pultrusion molding process;

 

7) Bag pressure method (pressure bag method);

 

8) Sheet molding process;

 

9) Group packaging molding process;

 

10) Vacuum Assisted Lightweight RTM (L-RTM)


Company Profile

Shandong Zhongjiuyuan Chemical Products Co. , Ltd.  .Since its establishment, to pursue quality, integrity service as its own responsibility, and constantly enhance technical strength, improve management level. After years of efforts, the company has developed into a cross-regional diversification of the comprehensive enterprise. Located in Jinan, Shandong province, China's largest chemical production and distribution center, Shandong Zhongjiuyuan Chemical Products Co. , Ltd.  is a production, processing and sales-oriented Chemical Co. , Ltd. . From Company to 2023, the company has transformed itself into a high-paying technology company engaged in the transformation of scientific research achievements. The company adopts juyou independent only product technology to produce, using green technology to produce products, the company hopes through technological innovation, management innovation, Mechanism Innovation, warehousing logistics innovation, to create the influence of domestic chemical enterprises. The company not only enjoys a high reputation at home, but also exports directly to more than 30 countries and regions in the Middle East, South , Northeast Asia and Southeast Asia, it is a key export enterprise in the region that has always insisted on developing by relying on science and technology to seek progress. It has, has a complete project r & D team, and has strong ability to tackle key technical problems. People with bachelor's degree or above account for 60% of the population, management personnel are not focused on bachelor's degree or above, with the leading edge of technology for the development of the company to provide strong support, the company advocates"Everyone is a manager" model of development, truly realized the employee from“The laborer” to“The manager” to“The boss's role transformation”

The company has benzyl alcohol, propionic acid, dimethylamine, dimethylamine aqueous solution, dimethylsiloxane mixed ring, Dimethylformamide, dichloromethane, cyclohexanone, epsilon-caprolactam acid, formic acid, nylon 6 tablets, Polyamide perfluoroethylene propylene, polycarbonate resin, benzyl chloride, formic acid, n-butanol, oxolane, triethylamine, DMF, octanol, cycloethane, tetrachloroethene, dichloromethane, chloroform, dimethyl dichlorosilane, methyltrichlorosilane, triethylamine, n-propyl alcohol, propionic acid, isopropyl acetate, chlorinated paraffin, chlorosulfonic acid, trimethylamine, trimethylmonochlorosilane, chloroform, triethylamine, hydrogen peroxide, tetrachloroethene, octanol, monomethylamine, monomethylamine aqueous solution, chloromethane, isobutyraldehyde, n-butyraldehyde, n-butanol, acetone, methacrylic acid, methyl methacrylate, methacrolein, methylallyl alcohol, hydroxyethyl methacrylate, hydroxypropyl methacrylate, isopropyl alcohol, hydroxyethyl acrylate, hydroxypropyl acrylate, salt, fluorosilicon chemicals, basic chemicals, new chemical materials, etc. . The company always adhere to the market-oriented, customer-centric, quality as the lifeblood of the enterprise, to integrity as the foundation of corporate governance. The industry has established a variety of service systems, the formation of North China, South China and even the national sales network. With good reputation, high-quality products, strong strength, low prices of the country's more than 30 provinces, cities, autonomous regions, municipalities directly under the city, products by users trust. The company has a first-class marketing service system, strong warehousing and transportation capacity and supporting the supply and marketing capacity, and gradually make it an important channel for marketing. The company always adhere to the quality of credibility, innovation and development, efforts to provide world-class products and first-class service.

 

Company Culture

The company follows the management policy of "customer first, integrity-based", with reasonable price and good reputation, it wholeheartedly provides comprehensive and effective services for friends from all walks of life. We always adhere to the business strategy of "mutual benefit, small profits and high sales", improve the sales service system, constantly send innovative and excellent products to customers, and create a mutually beneficial cooperation platform with customers!

"Integrity, truth-seeking, hard work and hard work" is the company's corporate spirit, which is also the company's commitment to every customer: now , credit Tong has embarked on its high-speed development pace and is committed to better service.

Business tenet: to survive by quality, to develop by science and technology, to benefit by management, to market by integrity.
Company mission: quality comes from creating the world conscientiously
Core values: the pursuit of higher quality , never-ending . Continuously improve product quality and always meet customer needs

Service

1. Purity, Package, Mark, thiry party test (SGS,BV,Intertek,CIQ)
2. Sample order are acceptable
3. reply you for your inquiry asap within 12 hours
4. Cargoes photo before and after loading into container will be sent to you by email
5. Guaranteed delivery time
6. Full experience in this field
7. Good cooperation with cargo agents and shipping companies
8. professional sales and engineers will solve the problem you concern

FAQ

Q: Are you a factory or trading company?

A: Yes,we are factory, but not only factory, we also have sales team, own designers, own showroom, can help buyers to decide which products are their suitable choice, and all your inquiry will be replyed within 24 hours.

Q: Could you send me all your catalogues and price list?

A: As we have more than thousands of items, even 1 item have different size and package, it is really hard to send you all our catalogue and price list for you. Please inform me the items, size and packages you are interested in, so we can offer you the price list you need for your reference .

Q: Can I get some samples for testing?

A: we are honored to provide samples, the shipping cost should be paid by customers at first. And it will be returned to you in our first time cooperation. 

Q; How does your factory do regarding quality control?

A: Our factory has passed ISO9001 2008, REACH, FAMIQS Certificate.

Q: What's your Delivery Time?

A: In generally, the delivery time is 5 days-15 days after receiving payment. For large quantity it will be checked with
production dept. We will make the delivery as soon as possible with the guaranted quality.

Q: What is payment terms?

A: L/C, T/T, Western Union are all accepted, and if you have better idea, please feel free to share with us.

Q: Which documents can you supply?

A: We usually provide our customers with Commercial Invoice, Price List, Packing List, COA, Origin Certificate, Quality/Quantity Certificate, Beneficary's Certificate, MSDS, B/L and others as your request.

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