HQEE, CAS No.: 104-38-1 Polyurethane Chain Extender, Manufacturer

الوصف

Products details
Classification: Chemical Auxiliary Agent
CAS No.: *******1
Other Names: 
Hydroquinone bis(*-hydroxyethyl)ether
MF: C*0h*4o4
EINECS No.: ********3
Purity: *9%
Type: Polyurethane Curing Agent
Usage: 
Plastic Auxiliary Agents, Rubber Auxiliary Agents, Textile Auxiliary Agents, Curing agent for polyurethane elastomers and cast polyurethanes
Off white power: Off white
Description
2, 2''-(1, *-Phenylenedioxy)diethanol-HQEE
APPLICATIONS
HQEE is a symmetrical aromatic diol chain extender. It can improve tensile, hardness, resilience properties to MDI-polyurethane elastomers. HQEE/MDI is a PU elastomer series parallels MOCA/TDI. Finished products as: Oil well seals, forklift tires, conveyor belt, hydraulic cylinder seals, many other PU products and spandex. LCU elastomers require two principle components: A prepolymer terminated with reactive isocyanate groups and a difunctional active hydrogen-terminated chain extender. Prepolymer is a product based on the reaction of polyester or polyether with isocyanate (TDIMDIADI). The chain extender is usually a short chain of diamine or diol. MDI prepolymers are usually extended with diols. 
TEMPERATURE
HQEE melt tank should be uniformly heated and mildly agitated to prevent skimming on the surface. The prepolymer should be preheated to **0 before the HQEE is added and the resultant blend should be maintained at **0. All process lines should be heated to **0 and insulated to prevent cold spots that might cause HQEE aromatic diol to crystallize and clog the lines or result in an inaccurate mix ratio. The temperature of the mold, should be **0 to prevent defects in the resultant elastomer. 
MIX RATIO
With HQEE/MDI systems, the equivalent weight ratio of prepolymer to chain extender NCO/OHshould be between 0.9/1 and 1.1/1. To achieve optimum properties in elastomers based on HQEE/MDI systems, it is suggested that the NCO/OH ratio be as close to 1.1/1 as possible. 

NOTE
HQEE is off-white flakes and powder. It has a melting point of **2 and an auto-ignition temperature of **7. HQEE is hygroscopic and should be stored in a cool dry place. To help prevent moisture absorption, desiccant agent is included in the drum. It is important that the drum and inner bag be resealed if only part of the HQEE is used. HQEE is also sensitive to light (UV) and will turn yellow or brown in the presence of light. 
HQEE is very sensitive to moisture, it should be stored in a dry location. 
PACKAGING
Net **-kg carton drum with polyethylene liner.