Urethane oligomers, polyester-based

Aliphatic polyester-based urethane dimethacrylate (oligomer) 8.25... 

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. Aliphatic polyester-based urethane dimethacrylate oligomer... 

From Table X, the IPDI based oligomers have better solvent resistance than the TDl based ones. IFDl based oligomers also appear to exhibit better adhesion. Other properties are not affected by dllsocyanate choice. Polyester based materials seem to give better flexibility and solvent resistance than polyether based urethanes (Table XI). The branched polyether in composition N gives better adhesion and solvent resistance than the linear polyether. 

The primary chemical classes from which adhesives are made include epoxies, acrylics, phenolics, urethanes, natural and synthetic elastomers, amino resins, silicones, polyesters, polyamides, aromatic polyheterocyclics, and the various natural products such as carbohydrates and their derivatives as well as plant- and animal-based proteins. Chemical class was once a relatively clean differentiator of adhesives, but so many adhesives now are hybrids, designed to take advantage of specific attributes of more than one chemical class or type of material. Hybridization can be accomplished by incorporating into an adhesive a nonreactive resin of a different chemical class adding another type of reactive monomer, oligomer,... 

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