Smart monomers for sustainable packaging

IUPAC Name: 2,5-dihydro-1,4-dioxepine-2-thione

Synonyms: Thionoglycolide, TGD, 1,4-Dioxan-2-one, 5-thioxo- (ACI)

CAS number: 2983470-69-3

Molecular Formula: C₄H₄O₂S
Molecular Weight: 132.14 g/mol

Technical description: yellow liquid
Melting point: 30°C

Boiling point: > 150°C decomposes
Solubility: well soluble in most organic solvents, soluble in water

TLT2 is a glycolide-derived specialty monomer containing a single sulfur atom, specifically engineered for radical copolymerization with a wide range of acrylic monomers.
Extensive compatibility studies have confirmed efficient reactivity with, but not limited to:
Methyl acrylate, Ethyl acrylate, Butyl acrylate, 2-Ethylhexyl acrylate, Hydroxyethyl acrylate, Hydroxypropyl acrylate, Cyclohexyl acrylate, Lauryl acrylate, Benzyl acrylate, and Isobornyl acrylate.
By incorporating TLT2 into acrylic polymer backbones, formulators can introduce selectively degradable linkages that maintain high-performance mechanical and thermal properties while enabling on-demand degradation under controlled chemical stimuli.