Polyurethane chain extender Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane, imported from Dorf Ketal, India (formerly DuPont), factory price direct sales

• Describe
• Specifications
• Application
• Service

Dorf Ketal 4200, polyurethane chain extender Unilink 4200, 4,4-bis (sec butylamino) - diphenylmethane (formerly DuPont) Overview:

 Unilink®4200 4,4-bis (t-butylamino) - diphenylmethane is a unique aromatic diamine used as a chain extender in polyurethane elastomers, which can generate a linear polymer network. The crosslinking degree of polyurethane formulations can be controlled by adding high-performance polyols.
 
 Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane is a secondary amine chain extender with lower reactivity than other aromatic amines. Its low reactivity makes Unilink ® 4200 4,4-bis (t-butylamino) - diphenylmethane can be used as an effective curing agent in TDI and MDI formulations, Using Unilink ® The 4200 matured polymer has a longer pot life and lower hardness, while also improving strength, adhesion, impact resistance, and low temperature resistance.
 
 It is a liquid secondary diamine, in which the hydrogen atom on each amino group is replaced by a secondary butyl group, The combination of active hydrogen atoms and sec butyl groups in a limited space produces many unique properties, with the amino group forming a urea bond that affects the hard segment, while the butyl group acts as an internal plasticizer. It is connected to the polymer matrix and will neither leach nor precipitate. At the same time, alkyl groups increase the solubility of diamines, allowing them to mix with almost any polyol and polyamine.

 
 The main advantages of Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane are:

         ·Adjust reaction rate
         ·Good compatibility with polyols and polyamines
         ·Extend the lifespan of the mixture kettle
         ·Improve mechanical performance

Dorf Ketal 4200, polyurethane chain extender Unilink 4200, 4,4-bis (sec butylamino) - diphenylmethane (formerly DuPont) Packaging specifications:

Dorf Ketal 4200 from India, polyurethane chain extender Unilink 4200, 4,4-bis (sec butylamino) - diphenylmethane (formerly DuPont) application:

Soft foam:
 Large foam: In standard TDI And high resilience foam combination, 3-5% Unilink ® 4200 can improve the tensile strength, tear strength and bearing capacity of foam. In most cases, these advantages are realized by reducing the density of foam. In polyester foam, the same proportion of Unilink ® four thousand and two hundred It can significantly improve the tear strength and bearing capacity without affecting other properties of foam.

 Cold molded foam - It has been confirmed in commercial applications that adding 1-2% Unilink ® four thousand and two hundred 4,4-Bis (sec butylamino) - diphenylmethane can reduce the density and soften foam, thus optimizing the performance of foam. It can also enhance tensile strength, tear strength, and elongation, and shorten demolding time.
 
 Hard foam:
 Polyurethane rigid foam – Use 3-5% Unilink in water or anhydrous rigid foam systems ® 4200 4,4-bis (sec butylamino) - diphenylmethane, It can significantly improve the compression strength and dimensional stability of foam, reduce brittleness, increase the closed porosity and reduce the thermal conductivity.
 Polyisocyanurate rigid foam - Add 5% Unilink to the system ® 4200 can increase the compressive strength by 100%, and the dimensional stability is significantly improved in high proportion water foaming or all water foaming.
 
 coating
   Paint:The curing performance of Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane on TDI and MDI system coatings at room temperature depends on the catalyst and co curing agent used. Finished coatings can be used for spraying and pouring processes. Using Unilink ® The low viscosity of the 4200 cured formula makes coating processing more convenient, helping to improve surface wetting, adhesion, and surface quality. 

adhesive
 Adhesive:By reducing the contact angle of the liquid resin, Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane provides better wetting of the substrate, resulting in better adhesion of the polymer to the covered substrate.

sealant
 Hard elastomerCan be used for curing semi prepolymers based on MDI to produce a range of high hardness elastomers.

elastomer
  Soft elastic material:As a curing agent, it can extend the lifespan of the kettle and produce soft elastomers for industrial sealing materials.
 
 Polyurea system
 Unilink ® 4200 4,4-bis (sec butylamino) - diphenylmethane can delay the gel reaction, allow the use of polyurea coating spraying and pouring technology. Longer gel time is conducive to better bonding of the substrate, better product liquidity, improved bonding between coatings and film brightness ® The polymer cured with 4200 4,4-bis (t-butylamino) - diphenylmethane will have excellent physical properties, with significant improvements in impact resistance and low temperature resistance.

After sales service commitment · Enjoy worry free procurement

Operating for 20 years

Integrity first, unchanged original intention: to be an explorer and guide in the industry

Quality assurance

International renowned chemical brand's general agent in China, all products are genuine and licensed

Worry free procurement

Any dissatisfaction can be returned or exchanged within 15 days

Inventory Guarantee

Multiple large professional warehouses with sufficient inventory reserves to prevent shortages and price increases

Lightning delivery

Same day shipping, free delivery within 48 hours to surrounding areas

technical guidance

Master of Chemistry, 20-year Chemical Application Practice Team, providing technical guidance