Hqee, Hydroquinone Bis (2-hydroxyethyl) Ether CAS 104-38-1

Product Description

Product Description Product Name Hydroquinone bis(2-hydroxyethyl)ether
Brand Name HQEE-SWXY
Identification
Synonyms HQEE, 1,4-Bis(2-hydroxyethoxy)benzene; 2,2'-p-Phenylenedioxydiethanol; 2,2'-(1,4-Phenylenedioxy)diethanol; p-Bis(2-hydroxyethoxy)benzene; Hydroquinone bis(2-hydroxyethyl)ether
Molecular Formula C10H14O4
Molecular Weight 198.20
CAS Number 104-38-1
EINECS/ELINCS 203-197-3
Structure
Properties
Appearance off white to white powder or flake
Melting Range 102-105°C
Boiling Point 190°C (0.3 mmHg) Specification

Item	Specification
Appearance	Off white to white powder or flake
Moisture	0.15% max
Hydroxyl Value	545±15mg KOH/g
Solubility at 25ºC,wt.%
Water	<1
Acetone	4
Ethanol	4
Ethyl Acetate	1
Ethane	<1
Specific Heat Cal/g /ºC	0.4
Melt Density at 110ºC g/ml	1.15
Viscosity at 40ºC, cp	780
Melt Viscosity at 110ºC, cp	15
Bulk Density (loose) g/ml	0.51
Bulk Density (packed) g/ml	0.62
Pounds/53 gallons	250
Hygroscopicity, %
Dried at 50ºC,34mmHg, 16hrs	0.08
At 24ºC, 66.5 Relative Humidity, 168hrs	0.39

Application
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 and many other PU products.
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 (TDI,MDI,ADI). 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 110ºC before the HQEE is added and the resultant blend should be maintained at 110ºC. All process lines should be heated to 110ºC (min.) 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 over 110ºC to prevent defects in the resultant elastomer.
Mix Ratio
With HQEE/MDI systems, the equivalent weight ratio of prepolymer to chain extender (NCO/OH)should 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 102ºC and an auto-ignition temperature of 467ºC. 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.
Packing and Storage
Packing In 20kgs carton with polyethylene liner
Storage Keep tightly closed. HQEE is hygroscopic and will change color under sunlight. Keep tightly closed and store in ventilated place. Keep away from moisture and sunlight
Safety Information
Non-hazardous for air, sea and road freight.
Detailed safety information is contained in each Material Safety Data Sheet, which can be obtained from our company. Frequently Asked Questions
Q1: May I get one sample before placing order?
Re: Yes, Sample are available. For normal products, samples are for free and you just need to bear the freight; For those high value products, you just need to freight and certain product cost. When we both cooperate for some times or when you are our VIP customer, free sample will be offered when you need.
Q2: Which payment is available for your company?
Re: T/T, L/C . You can choose the one which is convenient for you.
Q3: How and when can I get my goods after payment?
Re: For small quantity products, they will be delivered to you by international courier(DHL, FedEx, TNT etc.) or by air. Usually it will cost 3-5days that you can get the goods after delivery.For large quantity products,shipping by see is worthwhile.It will cost days to weeks to come to your destination port, which depends on where the port is.
Q4: Is there any possible to use my appointed label or package?
Re: Yes. If needed, we'd like to use label or package according to your requirement.
Q5: How can you guarantee the goods you offer is qualified?
Re: We always believe honesty and responsibility are basis of one company, so whatever products we provide for you all are qualified. We will have goods tested and provide COA before delivery for sure.

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