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Specialty Chemicals

Monomers & Crosslinking Agents

Acrylates, methacrylates, diols, anhydrides and functional monomers for polymer synthesis, crosslinking, coatings and specialty materials.
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Monomers and crosslinkers decide what a polymer can do. This sub-category supplies the building units for addition and condensation polymers and the agents that join chains into networks. Examples include 1,6-Hexanediol diacrylate and 1,6-Hexanediol, 1,2,4-Benzenetricarboxylic anhydride (trimellitic anhydride), the fluorinated monomer 1H,1H,2H,2H-Heptadecafluorodecyl methacrylate and 2-Acrylamido-2-methylpropanesulphonic acid (AMPS).

Purity and inhibitor level are the main concerns for monomers, as impurities can terminate chains or alter reactivity ratios. For crosslinkers, functionality and spacing between reactive groups control network density and flexibility. Fluorinated monomers give low surface energy coatings, while sulphonic acid monomers such as AMPS add water solubility and salt tolerance.

  • Multifunctional acrylates for UV-cured coatings and inks
  • Diols and anhydrides for polyesters and alkyds
  • Functional monomers for hydrogels and specialty surfaces

Monomers ship in inhibited form in bottles or drums, kept away from heat and direct sun during transit. Each lot comes with a COA and SDS stating the inhibitor and its level.

Monomers & Crosslinking Agents: questions buyers ask

Should I remove the inhibitor before polymerising a monomer?
For many free radical polymerisations, especially at larger scale, the initiator simply overcomes the small amount of inhibitor. For controlled methods such as ATRP or RAFT, or kinetic studies, removing it by passing through basic alumina or by distillation gives more reproducible results. Use the purified monomer promptly.
What does AMPS add to a polymer?
AMPS contains a strongly acidic sulphonic group that stays ionised across a wide pH range. Copolymers with AMPS have high water solubility, salt and calcium tolerance, and stability at high temperature. They are used in oilfield chemicals, superabsorbents, hydrogels and water treatment polymers.
How do diacrylates affect a cured coating?
Diacrylates such as hexanediol diacrylate join chains at two points, raising crosslink density. This increases hardness, chemical resistance and cure speed, but can make films more brittle. Blending with monofunctional monomers or flexible oligomers balances hardness and flexibility in the final coating.

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