Sulfuric acid bleaching properties

These resins have many of the same properties as the epoxy, acrylic, and Bisphenol A fumurate resins. The vinyl ester resins have replaced polyester resins in mortars for bleach towers in the pulp and paper industry. The major advantage of these resin systems is their resistance to most oxidizing mediums and high concentrations of sulfuric acid, sodium hydroxide, and many solvents. Comparative resistances of the two types of vinyl ester mortars are shown in Table 7.13. 

Properties Tenacity ranges from 1 to 2 g/denier elongation 25-50%, d 1.32, moisture regain 16% (21.2C, 65% relative humidity), decomposes at 126C, scorches at 204C, resistant to most acids except hot sulfuric, destroyed by alkalies and chlorine bleach, resistant to mildew but attacked by insects, amphoteric to dyes. Combustible. 

---