What is Polycarboxylate Ether Monomer HPEG CAS 31497-33-3?

It is a methyl allyl alcohol polyoxyethylene ether macromonomer supplied as white to yellowish flakes or paste. HPEG is used mainly as a reactive raw material to synthesize polycarboxylate ether superplasticizers for concrete and mortar.

Why is HPEG used to make polycarboxylate superplasticizers?

HPEG provides the long polyoxyethylene side chains that create steric hindrance when the monomer is copolymerized with acrylic acid. This comb-like structure helps disperse cement particles and improves water reduction, slump retention, and workability.

What does the double bond retention specification mean?

Double bond retention measures the percentage of reactive terminal methallyl groups available for polymerization. A value of at least 98% indicates high monomer purity and supports more complete conversion during superplasticizer synthesis.

Which HPEG molecular weights can you supply?

The product is commonly supplied with molecular weights around 2400, 3000, or 4000, and the hydroxyl value varies with the selected molecular weight. The appropriate grade depends on the target superplasticizer viscosity, water reduction, and slump retention.

What are the recommended storage conditions for HPEG flakes?

Store the material in a cool, dry, ventilated warehouse, ideally below 35 degrees C, away from strong sunlight and moisture. Keep bags closed because the polyether is sensitive to humidity and may soften or cake if exposed to heat or water.

Polycarboxylate Ether Monomer HPEG CAS 31497-33-3

Polycarboxylate ether monomer is a high-performance polyether macromonomer synthesized through the ethoxylation of prenol or methallyl alcohol, functioning as a vital reactive precursor in the synthesis of concrete superplasticizers. This polyoxyethylene isopentenyl ether, often referred to in industrial production as HPEG or TPEG, utilizes its unsaturated double bonds to undergo free radical copolymerization with acrylic acid, creating a comb-like polymer structure that facilitates steric hindrance and electrostatic repulsion in cement particles. As a specialized methallyl polyoxyethylene ether, it is typically applied in the manufacturing of high-range water reducers to enhance the slump retention and workability of concrete mixtures. We provide this material with competitive factory pricing to ensure cost-efficiency in large-scale production, offering customized specifications to meet diverse polymerization requirements. Each shipment is backed by comprehensive documentation, including MSDS, TDS, COA, and is available for bulk supply to support global construction chemical infrastructure.

CAS: 31497-33-3
Synonyms: HPEG, HPEG-2400, TPEG, Polyether macromonomer, Polyoxyethylene isopentenyl ether, Methallyl polyoxyethylene ether
Molecular Formula: CH2=C(CH3)CH2O(C2H4O)nH
Grade: Industrial Grade
Package: 25kg/bag, 200kg/drum, or 1000kg IBC tank

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Product Description

Polycarboxylate Ether Monomer (widely known in the industry as HPEG or TPEG) is the critical reactive macromonomer used to synthesize high-performance Polycarboxylate Superplasticizers (PCE). Through free radical copolymerization with acrylic acid, our monomers create a comb-like polymer structure that delivers exceptional steric hindrance and water-reducing performance in modern concrete mixes.

Designed specifically for construction chemical manufacturers, our HPEG/TPEG flakes guarantee excellent reactivity with a double bond retention rate of ≥98%, ensuring a high conversion rate during your PCE mother liquor synthesis. We offer competitive factory pricing and customized specifications based on varying molecular weights (Mn 2400/3000/4000). Backed by reliable bulk supply capabilities, every shipment is fully documented with MSDS, TDS, COA to support your facility’s strict quality control.

1 Technical Data (Physicochemical Properties)

2 Applications

3 Storage & Safety

4 Quality Assurance

Technical Data (Physicochemical Properties)

Property	Specification (Standard)
Appearance	White to yellowish flakes or paste
pH Value (1% water solution)	5.0 – 7.0
Hydroxyl Value (mg KOH/g)	22.0 – 26.0 (Variable by molecular weight)
Double Bond Retention (%)	≥ 98%
Moisture Content (%)	≤ 0.5%
Molecular Weight (Mn)	2400 / 3000 / 4000 g/mol
Solubility	Soluble in water and various organic solvents

Applications

Construction Chemicals: Primary raw material for Polycarboxylate Superplasticizer (PCE) mother liquor.
Industrial Polymer Synthesis: Used in the production of water-soluble dispersants and scale inhibitors.
Research & Development: Employed as a macromolecular intermediate for grafting and block copolymerization studies in material science.

For the acrylic-acid comonomer used in PCE synthesis, see Glacial Acrylic Acid.

Storage & Safety

Storage: Store in a cool, dry, and well-ventilated warehouse. Keep away from direct sunlight, moisture, and high temperatures to prevent the degradation of double bonds.
Safety Handling: Wear appropriate Personal Protective Equipment (PPE), including chemical safety goggles, industrial gloves, and protective clothing. Avoid inhalation of dust or contact with skin and eyes.

Quality Assurance

Our production facility implements rigorous quality control protocols to ensure polymer consistency. Each batch undergoes HPLC (High-Performance Liquid Chromatography) for purity analysis and NMR (Nuclear Magnetic Resonance) spectroscopy to verify double bond retention and molecular structure. Although an industrial-grade material, our management follows GMP-aligned quality standards to ensure that the reactivity and stability of the monomer meet the highest international export requirements.

FAQ - Technical & Supply Chain

Q:
What is Polycarboxylate Ether Monomer HPEG CAS 31497-33-3?

A: It is a methyl allyl alcohol polyoxyethylene ether macromonomer supplied as white to yellowish flakes or paste. HPEG is used mainly as a reactive raw material to synthesize polycarboxylate ether superplasticizers for concrete and mortar.
Q:
Why is HPEG used to make polycarboxylate superplasticizers?

A: HPEG provides the long polyoxyethylene side chains that create steric hindrance when the monomer is copolymerized with acrylic acid. This comb-like structure helps disperse cement particles and improves water reduction, slump retention, and workability.
Q:
What does the double bond retention specification mean?

A: Double bond retention measures the percentage of reactive terminal methallyl groups available for polymerization. A value of at least 98% indicates high monomer purity and supports more complete conversion during superplasticizer synthesis.
Q:
Which HPEG molecular weights can you supply?

A: The product is commonly supplied with molecular weights around 2400, 3000, or 4000, and the hydroxyl value varies with the selected molecular weight. The appropriate grade depends on the target superplasticizer viscosity, water reduction, and slump retention.
Q:
What are the recommended storage conditions for HPEG flakes?

A: Store the material in a cool, dry, ventilated warehouse, ideally below 35 degrees C, away from strong sunlight and moisture. Keep bags closed because the polyether is sensitive to humidity and may soften or cake if exposed to heat or water.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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