About Lambson (Sartomer)

Lambson (now part of Arkema's Sartomer division), founded in 1960 and historically headquartered in Wetherby, United Kingdom, is a specialist in photoinitiators and UV/EB curing technologies. Acquired by Arkema in 2019 and integrated into Sartomer (headquartered in Exton, Pennsylvania, USA with global operations), it supplies advanced initiators for radiation-curable systems in coatings, inks, and adhesives. For the coatings industry, Lambson (Sartomer) offers photoinitiators and UV/EB curing additives. These enable fast curing, high reactivity, low odor, and excellent surface cure in UV-LED, electron beam, and energy-curable coatings for industrial, graphic arts, and protective applications.

SpeedBlock 1130

SpeedBlock 1130 by Lambson (Sartomer) (Sartomer) is a a-[3-[3-(2H-Benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]-?-hydroxypoly(oxo-1,2-ethanediyl); a-[3-[3-(2H-Benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]-?-[3-[3-(2H-benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl] -1-oxopropoxy]poly (oxy-1,2-ethanediyl) and polyethylene glycol. Acts as a UV absorber/light stabilizer. It may also be used together with other light stabilizers such as sterically hindered amines (HALS), examples of which are Speedblock 622, Speedblock 783, Speedblock 791, Speedblock 944 and Speedblock UV92. The combination of the two light stabilizers together can act synergistically and afford better protection than when using either component on its own. The product is miscible with all common solvents. Suitable for water borne and UV cured systems. SpeedBlock 1130 by Lambson (Sartomer) is developed for application in coatings, particularly used in industrial & automotive coatings, exterior surface coatings, metal coatings and wood coatings.

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SpeedCure DETX

SpeedCure DETX by Lambson (Sartomer) is a 2,4-diethylthioxanthone. Acts as a highly efficient photoinitiator. When used in conjunction with tertiary amine synergists, it initiates the rapid photo-polymerization of suitable resin formulations. Exhibits increased solubility over alternative thioxanthones and promotes surface curing of films. Can act as a photosensitizer for Type I photoinitiators. Shows two major UV absorption bands. Allows for single liquid additive comprising initiator and synergist. Suitable for pigmented systems. SpeedCure DETX is recommended for wood varnishes, printing inks and decorative coatings for metal cans and food cartons. Suggested levels of use are 0.25 – 3% w/w SpeedCure DETX together with 2 - 5% w/w amine synergist such as Speedcure EDB or DMB.

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SpeedCure ITX

SpeedCure ITX by Lambson (Sartomer) is a mixture of 2-isopropylthioxanthone and 4-isopropylthioxanthone. Acts as a highly efficient photoinitiator. When used in conjunction with tertiary amine synergists, it induces the rapid photo-polymerization of suitable resin formulations. Has good solubility in most common organic solvents & UV curable monomers, and Speedcure BEDB (~ 30% w/v at ambient temperature). UV absorption spectrum shows two major absorption bands. Allows possibility of producing a single liquid additive comprising both initiator and synergist. Can act as an efficient long wave sensitiser for Type I and Type II photoinitiators. Absorption at 258 nm promotes surface cure of films and at 383 nm promotes excellent depth cure in pigmented and thick films. SpeedCure ITX is suitable for wood varnishes, printing inks, decorative coatings for metal cans & food cartons. Suggested levels of use are 0.25-3% w/w Speedcure ITX together with 2 – 5% w/w amine synergist such as Speedcure EDB or DMB (quantities vary depending on individual formulations and applications).

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