Union's resin
Located in Changzhou, the foundation of fiberglass reinforced plastic (FRP) raw materials in China. Union can provide comprehensive resin solutions. Union is committed to meeting diverse customer needs and can customize products.
  • Vertical Integrated
    Vertical Integrated
    Vertical Integrated

    Produce phthalic anhydride, maleic anhydride, monomer, etc. in our own facilities. Which helps our resin to be competitive on market.

  • New Product Development
    New Product Development
    New Product Development

    Professional production testing equipment, according to TDS adjustment parameters, research and development of new products

  • Professional Team
    Professional Team
    Professional Team

    Union compsites, as a model enterprise with national technology patents, has been providing resin to customers from 50+ countries.

UP resin

Unsaturated polyester resin is the most commonly used type of thermosetting resin. Generally, it is a polyester condensation reaction between unsaturated dicarboxylic acid and diols or saturated dicarboxylic acid and unsaturated dicarboxylic alcohol at 190-220 ℃ until the expected acid value (or viscosity) is reached.
After the reaction is completed, a certain amount of vinyl monomer is added while hot to prepare a viscous liquid. This polymer solution is called unsaturated polyester resin.

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Resin Process

Hand lay up /Spray up

Pultrusion

Winding

RTM

Low viscosity, good mechanical strength and high Elongation

Features

Good mechanical strength and high Elongation

Good light transmittance

Low exothermic peak

Fast curing /low shrik /water resisting

high thermal deformation temperature and excellent chemical corrosion resistan

Low shrik and high strength

Water-resistance

Good thixotropic construction

Application

General purpose

FRP Products

FRP Products

Marine

Swimming pool

Marine

Marine

FRP molding products

High reactivity, fast curing, good mechanical strength and high elongation

Features

Good mechanical strength and high Elongation

High reactivity and fast curing

Low viscosity and fast curing

High thermal deformation temperature

High thermal deformation temperature

Application

General purpose

Pultrusion Products

Pultrusion Products

Pultrusion Products

Pultrusion Products

Low viscosity, good mechanical strength and high elongation

Features

Good mechanical strength and high Elongation

Low visocisty and High elongation

Low visocisty and High elongation

Application

General purpose

Winding pipe

Winding pipe

Low viscosity, good glass fiber wettability, fast curing and air-drying properties

Resin Code

Features

Fast curing and air-drying properties

Good aging resistance

Application

Marine

FRP products

Material Performance

Low Viscosity

Low Viscosity

Low resin viscosity refers to strong resin fluidity, making processing and construction more convenient.Typical fields:

Low Curing Shrinkage

Low Curing Shrinkage

Reduce volume shrinkage during the curing process to avoid material deformation caused by shrinkage.Typical fields:

High Strength

High Strength

High strength for materials refers to their strong tolerance to larger loads or loads without damage or deformation.Typical fields:

Good Elongation

Good Elongation

Better resistance to external pressures such as impact, compression, and tension.Typical fields:

Water Resistance

Water Resistance

The material has hydrophobicity and the ability to resist pressure water penetration.Typical fields:

Good Thixotropic Construction

Good Thixotropic Construction

The resin has a moderate viscosity during use, is easy to apply and scrape, and is not easy to flow. It has good processing performance and usage effect.Typical fields:

Good Wettability to Fiberglass

Good Wettability to Fiberglass

The ability of resin to penetrate multi-layer fiberglass reinforcement materials is good.Typical fields:

Good Mechanical Strength for FRP

Good Mechanical Strength for FRP

Glass fiber has high tensile strength and modulus, making Frp products have excellent tensile, bending, and impact resistance.Typical fields:

High Reactivity

High Reactivity

Capable of rapid polymerization reactions under conditions such as catalyst addition or heating.Typical fields:

Fast Curing

Fast Curing

The reaction rate of resin from liquid to solid is fast.Typical fields:

Good Resilience

Good Resilience

Has excellent stretchability and retraction, can stretch and deform without losing shape and dimensional stability.Typical fields:

Dried Surface

Dried Surface

After curing at room temperature, the surface of the resin does not touch.Typical fields:

Good Toughness

Good Toughness

The more ductile the material, the less likely it is to brittle fracture.Typical fields:

Chemical Corrosion Resistance

Chemical Corrosion Resistance

When eroded by chemical substances, it can maintain its original performance and structure without damage.Typical fields:

High Thermal Deformation Temperature

High Thermal Deformation Temperature

Different types of plastics have different thermal deformation temperatures. Generally speaking, the higher the thermal deformation temperature of a plastic material, the better its high temperature resistance.Typical fields:

Excellent Chemical Resistance

Excellent Chemical Resistance

The probability of excellent chemical reactions and the relative parameters of the magnitude of reaction rates.Typical fields:

Why Choose Union?
Our experienced engineering and support teams work hand-in-hand with customers to customize products based on their needs.
  • Supply Chains
  • Advanced Technology
  • Reasonable Price
  • Excellent Service
Perfect
Perfect
Supply Chains
The supply chain is among the top 10 in the industry Brand guarantee, fast and reliable product delivery, original packaging from brand factory.
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Product R&D capabilities
Product R&D capabilities
Customer sample analysis
We can point out customers' potential problems and provide better solutions and products based on the customer's process flow. We recognize that we only win when all of our customers receive the best solutions and support.
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Reasonable Product Prices
Reasonable Product Prices
Price advantage
We have a high-quality supply chain to ensure product price advantage. After the order is confirmed, if the price of materials increases, the order price will still be maintained; if the price of materials decreases, the price will be reduced proactively.
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Product Support
Product Support
Customized products
UNION can provide product customization according to customers different needs and processes.
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Customer Review

Resin for Swimming pool
We delivered 1*20GP 191PT for a customer who makes swimming pool.The following is customer's using feedback.
He said that our resin would be a good fit for their needs
Prepared a custom-made gel time for our customers
Our shipbuilding customers have requirements on gel time, the gel time is 20 minutes at 25 ℃, we specially prepared a custom-made gel time for him.
After using, the customer thinks it's the best resin they've ever used and would rather choose our products than the other cheaper one.
Welcome to buy our high quality resin, will give you a surprise, can be customized.
Customer recognition of 26E
26E is a kind of unsaturated polyester resin specially used in the production of transparent glass fiber glass panels, good infiltration of glass fiber.
It has good toughness and light transmittance, good aging resistance, suitable for mechanical/hand paste process.
Our customers use it well and approve it
Union's resin
Frequently Asked Questions
UNION is committed to meeting diverse customer needs and can customize products. Tell us your ideas and needs. We can customize your exclusive business so you can profit from it.
  • 1. What is the Transportation and Storage of Unsaturated polyester resin?
    The transportation shall comply with the chapter V of the Regulations on Measures for the Administration of Road Transportation Safety of Dangerous Goods.
    Store below 25℃, Avoid direct sunlight, fire and heat. With the compliance of all above, 3 months shelf life should be granted.
  • 2. How do you pack the resin?
    220KG/DRUM, 1 IBC=1000KG
    Pallet size: 1.12*1.12*1.03M
    1*20GP=80drums, 4drums=1 pallet, total 20pallets
    1*40HQ=108drums, 4drums=1 pallet, total 27pallets
  • 3. Can we get samples?
    Yes, we can provide free sample for you (within 6kg).
  • 4. What is the delivery time?
    It takes one month from production to shipment.
  • 5.Whether the resin can be customized?
    Yes, we can produce according to your requirments.
Let's Get Started on Your Custom Resin Project
If you are looking to get a quote on your project or you need more information about our team and services, we encourage you to get in touch with us today.
UNION COMPOSITE
Union Composites Changzhou Co., Ltd. is situated in Changzhou, a picturesque water town located in the southern region of the Yangtze River. As an export-oriented company, specializing in composite materials, 90% of our products are exported to Europe, Asia, America, Middle East and Africa.
Since established in 2012, our company has been adhering to the corporate mission of "intelligent manufacturing in China to the World", and is committed to providing customers with high-quality, high-performance and comprehensive composite material solutions.