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.

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, widely known as HPEG or TPEG, CAS 31497-33-3, is a reactive polyether macromonomer supplied for polycarboxylate superplasticizer (PCE) synthesis in concrete. Confirm the required molecular weight and specification, then request a quotation with COA/TDS/SDS for bulk supply.

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 HPEG CAS 31497-33-3 is a methyl allyl alcohol polyoxyethylene ether macromonomer, with the repeat-unit formula CH₂=C(CH₃)CH₂O(C₂H₄O)ₙH.

Synonyms: HPEG; HPEG-2400; TPEG; Polyether macromonomer; Polyoxyethylene isopentenyl ether; Methallyl polyoxyethylene ether.

CAS: 31497-33-3.

Molecular formula: CH₂=C(CH₃)CH₂O(C₂H₄O)ₙH.

It is supplied as white to yellowish flakes or paste.

It is soluble in water and various organic solvents.

HPEG provides the long polyoxyethylene side chains that create steric hindrance when copolymerized with acrylic acid.

This comb-like structure helps disperse cement particles and improves water reduction, slump retention and workability.

It is used mainly as a reactive raw material to synthesize polycarboxylate ether superplasticizers for concrete and mortar.

The double bond retention is typically about 98% or higher, indicating high monomer purity.

It is commonly supplied with molecular weights around 2400, 3000 or 4000, with a hydroxyl value that varies with the selected molecular weight.

The polyether is sensitive to humidity and may soften or cake if exposed to heat or water.

Store in a cool, dry, ventilated warehouse, ideally below 35 °C, away from strong sunlight and moisture.

Protect from moisture and keep bags closed when not in use.

Confirm appearance, pH, hydroxyl value, double bond retention, moisture content, molecular weight and grade as required.

Use suitable eye and skin protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended application, required molecular weight, grade, quantity, packaging, destination and document needs.

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.

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