As global environmental regulations become stricter, the problem of volatile organic compounds (VOCs) pollution in traditional adhesives has attracted much attention. As a new type of environmentally friendly material, monomer-free adhesives have achieved "zero VOCs emissions" through technological innovation and have become a popular choice in the fields of packaging, electronics, and construction. This article will analyze the core value of this technology from the perspective of technical principles and application advantages.
The core of monomer-free adhesives lies in their formula design. Taking solvent-free epoxy acrylate adhesives as an example, its ingredients include:
Prepolymer (30-50%): such as epoxy acrylate, polyurethane acrylate, etc., provide bonding strength and toughness.
Functional monomer (40-60%): including monofunctional (such as HEMA), difunctional (such as TPGDA) and multifunctional (such as TMPTA) monomers, which participate in cross-linking reactions but do not release VOCs.
Photoinitiator (1-6%): such as 1173, 184, etc., through ultraviolet light to stimulate free radical reaction, to achieve rapid curing.
Curing principle: Under UV light, the photoinitiator absorbs energy to generate active free radicals, triggering the monomer polymerization reaction, and the liquid adhesive solidifies into a solid state within seconds. This process does not require solvent evaporation, completely eliminating VOCs pollution
Environmental advantages and industry applications of monomer-free adhesives
Zero VOCs emissions: Solvents account for up to 50%-80% of traditional adhesives, while solvent-free adhesives completely avoid organic volatiles through UV curing technology, complying with strict environmental standards such as EU REACH.
High efficiency and energy saving: The curing time is shortened to seconds, improving production efficiency and reducing energy consumption.
Application scenarios:
Packaging industry: used for food-grade composite film production to ensure safety and pollution-free.
Electronic manufacturing: Fixing precision components to avoid chemical residues that damage circuits.
Construction field: Bonding environmentally friendly coatings and building materials to meet green building certification requirements.
The promotion of monomer-free adhesives is not only a technological innovation, but also an inevitable choice for sustainable development.
