Naugard K Bisphenolic Crompton-Uniroyal Chemical Antioxidants >> Phenolic Rubber - Elastomer (Chloroprene, Butyl …) NAUGARD ® K Antioxidant A bisphenolic antioxidant Low cost low volatility antioxidant recommended for the protection of SBR latex, carboxylated SBR latex and natural rubber latex products. Offers protection against heat sunlight and NO2 discoloration. Nonstaining and nondiscoloring. An excellent stabilizer for dipped goods, carpet backing and latex articles in general. Use at 0.5 to 1.0 phr. Nonstaining and nondiscoloring, low cost, low volatility bisphenolic antioxidant. Used in SBR latex, carboxylated SBR latex and natural rubber latex products. Offers protection against heat sunlight and NO2 discoloration. Can be used as a very good stabilizer. Use level : 0.5-1.0 phr.