Preparation and flame retardancy of 2‐EHA/n‐BA acrylic PSA containing single and combined flame retardants

Abstract

UV curable acrylic PSAs (pressure-sensitive adhesives) were modified with organic and inorganic flame retardants to improve flame retardancy of PSAs minimize the sacrifice of adhesion properties. The flame retardancy (UL-94 test) of acrylic PSAs were enhanced by the addition of 5-30 wt % of an organic flame retardant such as TCEP (Tris(2-chloroethyl)phosphate), PBPE (pentabromophenyl ether), and TBBPA(3,3 0 5,5 0 -tetrabromobisphenol A). Especially, TBBPA is the best flame retardant for acrylic PSAs when it works alone. However, PSAs compounded with aluminum trihydroxide (Al(OH) 3 ) showed a little reduction in burning time up to 30 wt %. An apparent synergic effect was observed only for an acrylic PSAs with a combination of TCEP and PBPE flame retardants. The addition of flame retardants brought a no significant effect on curing even in high amount. It was surmised that the miscibility between PSAs and flame retardant was closely related with flame retardancy and adhesion properties of acrylic PSAs.

Flame-Retardant Pressure-Sensitive Adhesives Derived from Epoxidized Soybean Oil and Phosphorus-Containing Dicarboxylic Acids

“…Unfortunately, most PSAs are flammable materials, which limit their range of applications, such as automotive and aerospace industries. 28,29 Many efforts have been made to improve the flame retardance of such materials. The addition of flame-retardant monomers into the polymer backbone or side groups through chemical bonds is an effective method.…”

“…Unfortunately, most PSAs are flammable materials, which limit their range of applications, such as automotive and aerospace industries. , Many efforts have been made to improve the flame retardance of such materials. The addition of flame-retardant monomers into the polymer backbone or side groups through chemical bonds is an effective method. − Among them, phosphorus-based compounds have been widely studied with regard to synthesis and application as flame retardants. − In this study, biobased epoxy resins derived from ESO and the carboxylic acid-terminated polyesters as the curing agents were designed and synthesized.…”