Phosphate Ester Functional Monomer: English Terms and Buyer Search Guide

Bottom line: “Phosphate ester functional monomer” is a category term, not one specific substance. Sourcing requires further confirmation of monofunctional or difunctional structure, methacrylate or acrylate chemistry, full chemical name, CAS and supplier grade. JCCM pages use related terms including reactive phosphate monomer, HEMAP, HEMA phosphate and difunctional phosphate methacrylate.

Common English category terms

• Phosphate ester functional monomer: the broad category name.
• Reactive phosphate monomer: highlights a phosphate monomer that can participate in polymerisation.
• Phosphate methacrylate monomer: a phosphate ester carrying methacrylate unsaturation.
• Phosphate acrylate monomer: a phosphate ester carrying acrylate unsaturation.
• Phosphate adhesion monomer / phosphate adhesion promoter: sourcing and marketing terms that emphasise interfacial adhesion.
• HEMAP / HEMA phosphate: generally 2-hydroxyethyl methacrylate phosphate.

How terms map to substances and grades

A category term describes a product family, a CAS number identifies a substance, and a commercial grade defines supplier-specific properties.

• KM2110 = HEMAP = 2-hydroxyethyl methacrylate phosphate, CAS 52628-03-2.
• KM2120 = bis(2-methacryloxyethyl) phosphate, CAS 32435-46-4, a difunctional phosphate ester.
• KM2130, KM2140 and KM2160 are alkyl or multifunctional commercial grades; consult the exact TDS rather than relying on category language.

Terms that are often confused

HEMA versus HEMAP

HEMA is 2-hydroxyethyl methacrylate and contains no phosphate group. HEMAP is 2-hydroxyethyl methacrylate phosphate and introduces phosphate functionality. Acid value, adhesion, hydrophilicity and regulatory suitability differ.

Monofunctional versus difunctional

Monofunctional means one polymerisable double bond and often favours flexibility and lower shrinkage. Difunctional means two polymerisable ends and can raise network density and shrinkage. Functionality must be evaluated in the final formula.

Methacrylate versus acrylate

Methacrylate and acrylate chemistry can differ in cure speed, odour, shrinkage and mechanical performance. Do not omit this distinction from an inquiry.

How to write a procurement inquiry

Include the English category term, full chemical name, CAS, functionality, target resin, dosage range, substrate, destination country, required documents and sample quantity. For example: “Phosphate methacrylate monomer, HEMAP, CAS 52628-03-2, for waterborne metal coating, 1 kg sample.” This is more actionable than “phosphate monomer”.

Frequently asked questions

Which grade should a search for phosphate ester functional monomer find?

The term covers a whole category and does not uniquely identify KM2110 or KM2120. If the target is inorganic-substrate adhesion, compare functionality, acid value and colour. If HEMAP or CAS 52628-03-2 is already specified, begin with KM2110.

Can a category term be used in a purchase contract?

Not by itself. A specification should include the full chemical name, CAS, grade code, key property ranges, test methods, packaging and document versions.