YANJIN™ Technology - High-Performance Monomers & Polymers

About YANJIN™ Technology

Yan Jin Technology Co., Ltd. is a national high-tech enterprise based in Tianjin, China, specializing in the research, development, and production of high-performance monomers and polymers. Since 2009, we have been committed to providing key building blocks for advanced polymeric materials across diverse industries.

Our product portfolio includes sulfonated monomers, amino monomers, diols, dithiols, activated fluorides, and a wide range of functional polymers. We support innovation through custom synthesis and joint development programs tailored to client-specific requirements.

Trusted by researchers and manufacturers worldwide

Our Product Lines

Sulfonated Monomers

High-purity monomers with sulfonic acid groups for proton-conductive polymers and fuel cell applications.

Water-soluble variants available
High thermal stability
Custom functionalization

Nitro Monomers

Electron-deficient building blocks for conjugated polymers and specialty materials.

High reactivity in nucleophilic substitution
Used in pharmaceutical intermediates
Stable crystalline forms

Amino Monomers

Primary and secondary amines for polyamide, polyurea, and epoxy curing applications.

High purity (>99%)
Low moisture content
Custom substitution patterns

Trifunctional Monomers

Branched monomers enabling 3D network formation in cross-linked polymers.

Ideal for thermosets
Enhanced mechanical strength
Controlled branching density

Diols

Aliphatic and aromatic diols for polyesters, polycarbonates, and polyurethanes.

High hydroxyl value
Low acidity
Narrow molecular weight distribution

Dithiols

Thiol-functional monomers for thiol-ene chemistry and self-healing materials.

High thiol content
Low odor formulations available
UV-curable systems

Activated Fluorides

Highly reactive fluorinated compounds for nucleophilic aromatic substitution.

Superior leaving group (F⁻)
Used in pharmaceuticals and agrochemicals
Stable storage forms

Sulfonated Polymers

Ion-conductive polymers for fuel cells, batteries, and separation membranes.

Tunable ion exchange capacity
Excellent chemical resistance
High proton conductivity

Amino Polymers

Polymers with pendant amine groups for adsorption, catalysis, and functional coatings.

High nitrogen content
Water-dispersible options
Cross-linkable variants

Twin Ionic Polymers

Zwitterionic polymers with both cationic and anionic groups for antifouling surfaces.

Superhydrophilic surfaces
Excellent biocompatibility
Low protein adsorption

Hypervalent Iodine Reagents

Green oxidants and functional group transfer agents for organic synthesis.

Environmentally friendly
High selectivity
Mild reaction conditions

Custom Synthesis

Tailored monomer and polymer development for unique application requirements.

From mg to kg scale
Full analytical support
IP protection guaranteed

Why Choose YANJIN™?

High Purity

All products undergo rigorous QC with HPLC, NMR, and MS analysis to ensure >99% purity.

Global Reach

Serving research institutions and industrial clients across Asia, Europe, and North America.

Joint Development

Collaborative R&D programs to co-develop next-generation materials with our partners.

Certified Quality

Recognized as a National High-Tech Enterprise with strict ISO-like quality management.

Frequently Asked Questions

What are sulfonated monomers used for?

Sulfonated monomers are primarily used in the synthesis of proton exchange membranes for fuel cells, water treatment membranes, and ion-conductive polymers due to their excellent proton conductivity and thermal stability.

Can you provide custom synthesis services?

Yes, we offer comprehensive custom synthesis services from milligram to kilogram scale. Our team works closely with clients to develop tailored monomers and polymers for specific applications, with full analytical characterization and IP protection.

What is the minimum order quantity?

Our standard minimum order quantity is 10 grams for most monomers. For custom synthesis projects, MOQ depends on complexity and scale. Sample quantities are available upon request.

Do you provide technical documentation?

Yes, we provide comprehensive technical data sheets (TDS), certificates of analysis (COA), and safety data sheets (SDS) for all products. Additional analytical data (NMR, HPLC, MS) can be provided upon request.

Are your products suitable for research use?

All our products are designed for research and industrial applications. High purity and consistent quality make them ideal for academic research, process development, and pilot-scale production.

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Advanced Monomers & Polymers for Next-Gen Materials