What are cyanate esters?

Cyanate esters are a class of organic compounds that contain a cyano (-CN) and carbonyl (-COO) group. They are usually formed by the reaction of a cyano group with a carboxylic acid. Cyanate esters are chemically important as intermediates in the synthesis of organic compounds. They also have industrial uses, such as as raw materials for organic synthesis and in the production of polymeric materials such as polyurethane. However, cyanate esters are also toxic and require safety in their use and handling.

Cyanate ester resins are a special class of polymeric materials whose molecules contain structural units of cyano (-CN) and carbonyl (-COO) groups. These resins are usually prepared by polycondensation reactions between the cyano and carboxyl groups. Cyanate resins have the following characteristics:

  1. High heat resistance: Cyanate ester resins usually have high thermal stability and high temperature resistance, and therefore perform well in high-temperature environments.
  2. Excellent Mechanical Properties: These resins usually have excellent mechanical strength and hardness, making them widely used in the preparation of high-performance composites.
    3. Good chemical resistance**: Cyanate ester resins usually have good resistance to chemicals, resisting many solvents and corrosive chemicals.
  3. Low Shrinkage: During the curing process, cyanate ester resins usually have a relatively low shrinkage rate, making them suitable for the preparation of precision parts and complex structures.
  4. Good adhesion: Cyanate ester resins usually have good adhesive properties and can be bonded to a wide variety of materials (e.g., metals, glass, plastics, etc.) to form strong bonds.
Cyanate ester structure
Cyanate ester structure
Cyanate ester features
Cyanate ester resin

cyanate ester resin

MCPS110 Modified cyanate prepolymer solution

Features:

The product is an elastomeric modified prepolymer of cyanate, which improves the reactivity of cyanate, improves the toughness of the material effectively, and has little influence on heat resistance. The product added 25% solvent, low viscosity state at room temperature. The solvent is usually MEK, and the solvent type can be changed according to the customer’s needs.

TCE1000 Toughened cyanate ester solution

Features:

TA1000S is a toughened, low viscosity prepolymer. It is very low in moisture absorbtion. It possesses outstanding hot-wet resistance performance and excellent dielectric properties. 100% neat resin is available according to different applications, product code is TA1000.

CAS NO 47073-92-7 Bisphenol E cyanate ester

Features:

It is liquid monomer at room temperature. It is very applicable to the process requiring low viscosity at room temperature.

CAS NO 127667-44-1 Bisphenol M cyanate ester

Features:

It is light yellow semi-solid or white powder crystal at room temperature. It can be polymerized to prepolymers or oligomers. Cured polymers have lower moisture absorption, better dielectric properties and higher fracture toughness.

CAS NO 101657-77-6 Tetramethyl bisphenol F cyanate ester

Features:

It is solid monomer at room temperature. It can be polymerized to prepolymers or oligomers. Cured polymers have outstanding hot-wet resistances and better flexural modulus.

CAS NO 30944-92-4 Novolac cyanate ester solution

Features:

It has the excellent properties such as higher thermal resistance, low flammability, high char yield requirements, etc. It possesses good process properties. Tg is around 400 ℃.

CAS NO 30944-92-4 Novolac cyanate ester solid

Features:

It has the excellent properties such as higher thermal resistance, low flammability, high char yield requirements, etc. It possesses good process properties. Tg is around 400 ℃. Products containing solvents are available to suitable for different operation conditions & technologies.

CAS NO 135507-71-0 Dicyclopentadienylbisphenol cyanate ester solution

Features:

It is a multifunctional cyanate resin. Cured polymer resin is lower dielectric constant and moisture absorption while the aromatic character maintains a high Tg. It can promote faster signal transmission and allow for higher densities of transmission lines. 100% neat product is available to suitable for different operation conditions & technologies. Product code is DB03CL.

CAS NO 135507-71-0 Dicyclopentadienylbisphenol cyanate ester solid

Features:

It is a multifunctional cyanate resin. Cured polymer resin is lower dielectric constant and moisture absorption while the aromatic character maintains a high Tg. It can promote faster signal transmission and allow for higher densities of transmission lines.

CAS NO 25722-66-1 Bisphenol A cyanate ester prepolymer solution

Features:

It is prepolymer and added 25% solvent to suitable for low viscosity process at room temperature. Normally the solvent is MEK. Other solvent can be used based on customer’s requirements.

CAS NO 25722-66-1 Bisphenol A cyanate ester prepolymer solid

Features:

It is prepolymer and viscous solid at room temperature. According to different viscosity index corresponding to different material codes.

CAS NO 1156-51-0 Bisphenol A cyanate ester monomer

Features:
High purity, low melting point, cyanate monomer, It can be polymerized to different molecular weight prepolymers or oligomers according to different operation conditions & technologies. High purity monomer can meet requirements of higher demanding applications.

application of cyanate ester resins

composite manufacturing

composite manufacturing

Cyanate resin is usually used as a matrix resin for composite materials, combined with glass fiber and other reinforcing materials to prepare high-performance composite materials for aerospace, automotive manufacturing, shipbuilding and other fields.

Paints and Coatings

Paints and Coatings

Due to its good chemical resistance, heat resistance and weather resistance, cyanate ester resin is commonly used in the preparation of high-performance paints and coatings, such as automotive coatings, industrial coatings and anti-corrosion coatings.

Adhesive

Architecture and Glass Facades application

Cyanate resin is commonly used as a structural adhesive because of its good adhesive properties, and is used for bonding of metals, glass, plastics and other materials, such as automobile manufacturing, shipbuilding, and construction engineering.

Electronic Materials

Electronic Materials

Cyanate resins can be used for encapsulation, bonding and insulation of electronic materials, such as semiconductor encapsulation, circuit board coating and other fields.

Mold Manufacturing

Mold Manufacturing

Cyanate resins have low shrinkage and good fluidity, which makes them suitable for the preparation of precision molds, such as injection molds and compression molds.

Medical Devices

Medical Devices

Cyanate ester resins can be used in the preparation of medical devices, such as medical adhesives, surgical instruments, etc., due to their better biocompatibility.

Cyanate resins in 3D printing materials:

Cyanate ester resins are also used in 3D printing materials, especially in light-curing 3D printing technology. Light-cured 3D printing is a common 3D printing technology that uses UV or visible light irradiation to cure liquid resin and build the desired object layer by layer.

Comparison of cyanate ester resins with other commonly used resins

Cyanate ester resins have some unique properties and application advantages over other commonly used resins. The following is a comparison of cyanate ester resins with some common resins:

Comparison with epoxy resins

  • Heat Resistance: Cyanate resins usually have high heat resistance and are able to maintain good performance at high temperatures, while epoxy resins have relatively low heat resistance.
  • Mechanical Properties: Cyanate resins usually have better mechanical properties than epoxy resins, with higher strength and hardness.
  • – Solvent Resistance: Cyanate resins usually have better solvent resistance, while epoxy resins have poorer solvent resistance.
  • -Processability: Cyanate resins have a faster curing reaction and better processability than epoxy resins.

Comparison with polyurethane resin:

  •  Temperature resistance: Cyanate resins usually have lower temperature resistance, while polyurethane resins have better temperature resistance.
  • Hardness: Cyanate resins are usually harder, while polyurethane resins are usually softer.
  • Processability: Cyanate resins cure faster and have better processability than polyurethane resins.
  • Cost: Cyanate resins are generally less expensive, while polyurethane resins are more expensive.

Comparison with polyimide resins:

  • Heat resistance: Polyimide resins generally have higher heat resistance.
  • Hardness: Cyanate resins are usually harder, while polyimide resins are usually softer.
  • Processability: Cyanate resins have better processability, while polyimide resins have poorer processability.
  • Cost :Cyanate resins are generally less costly, while polyimide resins are more costly.
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