Raw materials and additives for polymers
Zibo Koyon Chemical Technology is a professional one-stop supplier of polymer raw materials and additives, such as polyimide, polyester resin, epoxy resin, unsaturated resin and polyurethane,especially for polyimide monomer -Pyromellitic dianhydride (PMDA) & 4,4'-Oxydianiline(ODA).
Quality Assurance
Most of KOYON's polymer suppliers are well-known domestic enterprises or brands. They strictly implement the ISO 9001 quality management system and adhere to relevant industry standards, providing a strong guarantee that we can deliver excellent-quality products to our customers. All products delivered to customers undergo rigorous testing before leaving the factory, and we also conduct third-party testing (Such as SGS,BV) and provide reports upon request.
Professional technical team
KOYON has established a long-term strategic partnership with a team of experts from Shandong University of Technology which allowing us to provide customized solutions to the specific needs and challenges of our customers around the world.
In the field of polyurethanes, we offer formulation guidance to our customers and can customize special polyether polyols, such as pore-opening agents, demulsifiers, and defoamers.
Diverse Products & Industry Applications
KOYON leverages its robust resource integration capabilities and innovative thinking to establish a mature and comprehensive supply chain management system in the polymer sector. Our goal is to provide a one-stop solution for global customers seeking a diverse range of chemicals for polymers. Our products are widely used in various applications, including resins, coatings, and plastics.
Partnerships & Customer Service
KOYON responds promptly to customer needs and actively participates in domestic and international trade shows, seminars, and technical exchange events. Additionally, KOYON has established a customer satisfaction tracking mechanism, regularly gathering feedback to continuously refine our products and services, striving to exceed customer expectations and foster mutually beneficial growth.
Main fields
To provide you with one-stop solutions
Polymide (PI) Monomers
1. CAS No: 89-32-7
Pyromellitic dianhydride (PMDA)
2. CAS No.:101-80-4
4,4’-oxydianline (ODA)
Polyurethane
We provide you with polyether polyols, polyester polyols, polymer polyols and polymerized MDI and TDI 80/20 for the synthesis of polyurethanes.
Unsaturated polyester resin
We provide you with the anhydrides for the synthesis of unsaturated polyester resins, such as phthalic anhydride and maleic anhydride.
plasticizer
We offer trimeric anhydride as raw material for high temperature resistant plasticizer Trioctyl trimellitate (TOTM) and pyromellitic acid as raw material for tetraoctyl pyromellitate (TOPM).
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![Pyromellitic Dianhydride]()
Pyromellitic DianhydridePyromellitic Dianhydride (CAS 89-32-7),We offer two grades of content: 98% and 99.5% .99.5% grade is the primary product for exporting. It is mainly used as a monomer for the synthesis of polyimideread more -
![Cyanuric Acid]()
Cyanuric AcidCyanuric acid (CAS 108-80-5), is also known as Isocyanuric acid and tricyanuric acid, it is white crystal that precipitates from water and contains two molecules of water of crystallization. It has aread more -
![N,N-Methylenebisacrylamide]()
N,N-MethylenebisacrylamideN,N'-Methylenebisacrylamide (MBA) (CAS 110-26-9) ,is also known as methylene bis-acrylamide.It is white powder,odorless,minimal hygroscopicity.It is easy to self-crosslink in case of highread more -
![N-Methylol Acrylamide]()
N-Methylol AcrylamideN-Methylol Acrylamide (CAS:924-42-5) is also known as N-(Hydroxymethyl)acrylamide,It is white crystals,it is soluble in water and hydrophilic solvents,soluble in fatty acid lipids,almost insolubleread more -
![Acrylamide Solution]()
Acrylamide SolutionAcrylamide aqueous solution is a solution containing acrylamide,It is generally obtained by directly dissolving acrylamide in an aqueous solution.read more -
![Acrylamide Crystal 98%]()
Acrylamide Crystal 98%Acrylamide Crystal 98% (CAS 79-06-1 ), also known as AM, the molecule of it has two active centers,both weak acidic and weak alkaline, so it is easy to self-polymerize.It is soluble inread more -
![99.8% Recrystallization 4,4’-OXYDIANILINE]()
99.8% Recrystallization 4,4’-OXYDIANILINE4,4'-Oxydianiline, is also known as 4,4'-ODA and 4,4'-Diaminodiphenylether, due to its structure containing two active amine groups, it can efficiently react with acid anhydrides to form stable imideread more -
![99.5% Recrystallization PMDA]()
99.5% Recrystallization PMDAPyromellitic Dianhydride (PMDA), due to its rigid benzene ring structure and the highly reactive anhydride groups, can effectively participate in polymerization reactions to form stable imide bonds.read more -
![Polyester Polyols For Polyurethanes]()
Polyester Polyols For PolyurethanesPolyester polyols are an important material for the manufacture of polyurethane hard foam insulation, soft foam, adhesives, elastomers, paints, inks, sealants, leather resins, shoe resins, TPU, andread more -
![Polyether Polyols For Polyurethanes]()
Polyether Polyols For PolyurethanesPolyether polyols (PPG)are a class of macromolecular compounds formed by alkali-catalyzed polymerization of ethylene oxide, propylene oxide, or other epoxides.read more -
![Polymeric MDI]()
Polymeric MDIPoly[methylene(polyphenyl) isocyanate] is a diisocyanate-diphenylmethane(MDI)-based composition containing some higher functionality isocyanates. The functionality is about 2.6-2.7. It is a brownread more -
![Toluene Diisocyanate]()
Toluene DiisocyanateToluene Diisocyanate (TDI 80/20) (CAS 26471-62-5) is a mixture of 80% 2,4-toluene diisocyanate (CAS: 584-84-9) and 20% 2,6-toluene diisocyanate(CAS: 91-08-7). It is used in the production of flexibleread more
What important roles do organic acids and anhydrides play for polymers?
Application of acids to polymers
Acid can be used as a catalyst to promote polymerization, for example, in the process of preparing polyester, acid can accelerate the esterification reaction between alcohol and acid.
In some cases, acids can also catalyze ring-opening polymerization reactions, such as ring-opening polymerization of cyclic monomers. Some polymers can enhance their mechanical properties and heat resistance through acid-catalyzed crosslinking reactions.
Application of anhydride in polymers
Many anhydrides can be used as monomers to synthesize polymers. For example, maleic anhydride can be copolymerized with other monomers to produce polymers with special properties, such as copolymers used in coatings and adhesives. Pyromellitic dianhydride can be used as a monomer to synthesize polyimide. Anhydride can also be used as a crosslinking agent to improve the crosslinking density and heat resistance of polymers. For example, pyeomellitic dianhydride (PMDA) and phthalic anhydride (PA) can be used as crosslinking agents for epoxy resins. Anhydride can also be used to synthesize polymer materials with specific functions and uses, such as rubber, plastics, etc.
Pyromellitic acid
Fumaric acid
Levulinic acid
4,4 diaminodiphenyl ether
OUR KEY PRODUCTS
Polyimide Monomer -Pyromellitic dianhydride (PMDA) & 4,4'-Oxydianiline(ODA)
Polyimide (PI) is a class of high-performance polymers with excellent thermal stability, chemical stability and mechanical properties. They usually consist of a unit of preimine monomer with two acyl groups and can be thermoset or thermoplastic. Polyimide is widely used in many fields because of its excellent properties at high temperatures.
How to prepare polyimide films with PMDA and 4,4' -diaminodiphenyl ether (ODA)? .
Pyromellitic dianhydride(PMDA )and 4,4' -diaminodiphenyl ether (ODA) are important raw materials for preparing high performance polyimide films. First, ODA is dissolved in a suitable solvent, such as N, N-dimethylacetamide (DMAC), and then PMDA is added under nitrogen protection, controlling the reaction temperature between 0 and 20°C to form a thick polyamide solution. Next, the solution is rolled onto the metal strip by a casting process to form a gel, which is then dried by a gradually increasing temperature gradient to remove the solvent and form a film with a certain degree of self-supporting. Finally, at high temperatures (usually above 200°C), imide is performed, i.e. dehydration closes the loop to form a polyimide film. As needed, the film can also be stretched to improve its mechanical properties, and cooled, cut and packaged. Because of its excellent thermal stability and chemical stability, this film has been widely used in aerospace, microelectronics, optical fiber communication and other fields.
why choose us?
Professional factory facilities
Our production base is equipped with advanced production equipment and strict quality control system to ensure that each batch of products meet the highest standards.
Leading technical support
Supported by an experienced research team, we are able to provide customized solutions to meet the specific needs of different customers.
Rich export experience
With many years of experience in exporting all over the world, we are familiar with the regulatory requirements and transportation processes of international markets to ensure safe and on-time delivery of products.
Excellent customer service
We have a passionate and professional customer service team dedicated to solving all customer problems, from consultation to after-sales service.
One-stop purchasing solution
A range of related chemicals and services enable you to do all your purchasing needs in one place, simplifying processes and saving costs.
Strong R&D capability and continuous innovation
We continue to invest in research and development and cooperate with well-known research institutions at home and abroad to ensure that our products are always at the forefront of the industry. Through continuous technological innovation, we are able to respond quickly to market changes and provide our customers with the latest technologies and solutions.
our factory
Our certificate
As one of the leading additives manufacturers and suppliers in China, we warmly welcome you to buy high purity additives made in China here from our factory. All chemical products are with high quality and competitive price.
pop 2015 polyol 15 , Br SBS for construction industry, plasticizer Pyromellitic acid