Retarder ESEN Surface treated phthalic anhydride Crompton-Uniroyal Chemical Inhibitors ADHESIVE RETARDER ® ESEN Retarder – Antiscorch Agent Surface treated phthalic anhydride Used with all types of accelerators except the sulfenamide types to reduce processing scorch. Most effective in retarding basic accelerators and basic activators. Relatively nonstaining and nondiscoloring. Used as a non-discoloring anti-scorch agent at processing temperatures with only a minimum retarding effect at curing temperatures. Greatly improves processing safety of sulfur cures with a minimum effect on time to reach optimum cure. Relatively nondiscoloring and nonstaining, white stocks will turn cream during light exposure. Relatively nonstaining and nondiscoloring surface treated phthalic anhydride. Used as a non-discoloring anti-scorch agent at processing temperatures with only a minimum retarding effect at curing temperatures. Can be used in combination with all types of accelerators except the sulfenamide types. Improves processing safety of sulfur cures.