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Trimethylolpropane triacrylate

Chemical compound

Summary

Chemical compound

Trimethylolpropane triacrylate (TMPTA) is a trifunctional acrylate ester monomer derived from trimethylolpropane, used in the manufacture of plastics, adhesives, acrylic glue, anaerobic sealants, and ink. It is useful for its low volatility and fast cure response. It has the properties of weather, chemical and water resistance, as well as good abrasion resistance. End products include alkyd coatings, compact discs, hardwood floors, concrete and cementitious applications, Dental composites, photolithography, letterpress, screen printing, elastomers, automobile headlamps, acrylics and plastic components for the medical industry.

Other uses

As the molecule has acrylic functionality, it is capable of doing the Michael reaction with an amine. This allows its use in epoxy chemistry where its use speeds up the cure time considerably

TMPTA can be used as a vulcanization booster for specialty rubbers such as ethylene propylene rubber, EPDM rubber, silicone rubber, polyurethane, ethylene/vinyl acetate (EVA) copolymer and chlorinated polyethylene elastomer (CPE). Typically, the vulcanization process is catalyzed with organic peroxides (such as DCP or BPO) however some rubbers are difficult to fully vulcanize using only peroxide catalysts. This usually results in longer curing times and lower yields, compromising mechanical and physical properties. Adding TMPTA has greatly improved the kinetics of vulcanization: for example, when using DCP for curing, if 1 to 4% TMPTA additive is used as a curing agent, not only the curing time is greatly reduced, but the overall chemical and mechanical properties are improved.

Safety

TMPTA's classification got worse over time; in November 2023 all mixtures containing ≥ 1% by weight of TMPTA had been classified as carcinogen category 2 (H351). To overcome this problem, ethoxylated versions (EOTMPTA) were launched on the market, registred on ECHA with a range going from 1 to 6.5 moles of ethoxylation.

References

References

  1. "Scientific properties".
  2. "Summary of Classification and Labelling,".
  3. Wang, Qianhe. (January 2019). "PhD Dissertation Acrylated Alkyds".
  4. (2023). "Life Cycle Assessment (LCA) of Microcapsule based self-healing in concrete". MATEC Web of Conferences.
  5. (2019-06-20). "Synthesis and characterization of high-performance cross-linked polycarboxylate superplasticizers". Construction and Building Materials.
  6. (2023-06-01). "Synthesis of a cross-linked polycarboxylate ether superplasticizer and its effects on the properties of cement paste containing montmorillonite". Cement and Concrete Research.
  7. "Epoxy Polyacrylate Resins".
  8. "Low Viscosity, Fast Curing Epoxy Acrylate Oligomers".
  9. "TMPTA, use in rubbers".
  10. "TMPTA ALTERNATIVES FOR INDUSTRIAL COATINGS".
  11. "Substance infocard".
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

acrylate-esters monomers
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