URETHANE DIACRYLATE OLIGOMER

Chem. Descrip. Aliphatic urethane diacrylate oligomer with acrylate monomer (30%) diluent... 

Chem. Descrip. Aliphatic polyester-based urethane diacrylate oligomer Uses Urethane-acrylic for coatings, flexible pkg., screen inks Features Difunctional low vise. exc. conformal props. good weatherability, chem. resist., flexibility, adhesion, heat resist., abrasion resist., impact str., water resist. low shrinkage Properties APHA 55 clear liq. dens. 9.213 Ib/gal vise. 660 cps (60 C) ref. index 1.4882 tens. str. 945 psi 1% mod. 3557 psi elong. 53% CN996 [Sartomer]... 

Chem. Descrip. Urethane diacrylate oligomer Uses Flexibilizer, toughener for coatings, inks, UV/EB adhesives (pressure-sensitive tapes) applied to flexible substrates Features Imparts high flexibility and elasticity, adhesive peel sir., toughness high elong. 120%... 

Chem. Descrip. Aliphatic urethane diacrylate oligomer Uses Film-former for UV/EB-curable coatings and inks for paper/paper-board, plastic, and metal substrates base resin for screen printing inks Features Mod. cure response exc. solv. resist., surface hardness, flexibility, toughness... 

UV clearcoats are a common protective silk screen coating that can provide both a flexible and glossy surface property to point-of-sale promotional products such as polyvinyl chloride banners, as well as to fabrics. The coating is commonly comprised of about 40 to 80% by weight of an aliphatic urethane diacrylate oligomer and approximately 20 to 60 % by weight of a mono-functional component. 

Chem. Descrip. Aliphatic polyether-based urethane acrylate oligomer blended with hexanediol diacrylate... 

Oligomer urethane acrylate (LR 8739) and photoinitiator Irgacure 184 were obtained from IAEA. Reaction diluents 2-methoxy ethyl acrylate (MEA, Tg = -110°C), 2-ethylhexyl acrylate (EHA, Tg = -50°C), 2-hydroxy ethyl methacrylate (HEMA, Tg = 55°C), N-vinyl pyrrolidone (NVP, Tg = 175°C), tripropylene glycol diacrylate (TPGDA, Tg = 90°C), and trimethylol propane triacrylate (TMPTA, Tg 250°C) were used as procured from E, Merck without any further purification. 

PU-based acrylate-terminated polymers have also been introduced for use in UV-cured or electron beam (EB)-cured elastomer coatings. They are usually used in conjunction with di- or trifunctional acrylate resins such as 1,6-hexane diol diacrylate (HDDA) (Fig. 12.8) whose function is to control hardness and flexibility in the final elastomeric lacquer. A series of these special monomers and urethane oligomers is marketed under the trade name Photomer (Harcross Chemicals). 

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