structure contributed by the bisphenol-A provides several benefits. Thermal
stability is improved, and because the number of interior chain ester groups
is reduced, ther esistance to hydrolysis ands aponification increases.
Bisphenol-Ap olyesters havet he besth ydrolysis resistanceo fa ny
commercialu nsaturated polyester.
Theb isphenol polyestersa re superior in their corrosion resistant
properties to the isophthalic polyesters. They show good performance
with moderate alkaline solutions, and excellent resistance to the various
categories of bleaching agents. The bisphenol polyesters willbreak down in
highlyconcentrated alkalies. These resins can be used in the handlingofthe
following materials.
Acids, to 2008 F( 938 C)
Acetic
Fatty acids
Stearic
Benzoic
Hydrochloric, 10%
Sulfonic,3 0%
Boric
Lactic
Tannic
Butyric
Maleic
Tartaric
Chloroacetic, 15%
Oleic
Trichloroacetic, 50%
Chromic, 5%
Oxalic
Rayon spin bath
Citric
Phosphoric, 80%
Salt solutions to 2008 F( 938 C)
All aluminum salts
Cadmium salts
Copper salts
Most ammonium salts
Most plating solutions
Iron salts
Zinc salts
Alkalies
Ammonium hydroxide, 5%
to 1608 F(718 C)
Calcium hypochlorite,2 0 8 F
to 2008 F( 938 C)
Potassium hydroxide, 25%
to 1608 F( 718 C)
Calcium hydroxide, 25% to
1608 F( 718 C)
Chlorine dioxide, 15% to
2008 F(938 C)
Sodium chlorite, to 2008 F
(938 C)
Sodium hydrosulfite, to
2008 F( 938 C)
Solvents
Sour crude oil
Linseed oil
Glycerine
Alcohols at ambient
temperatures
Gases, to 2008 F(938 C)
Carbon dioxide
Sulfur trioxide
Sulfur dioxide, dry
Chlorine, wet
Carbon monoxide
Rayon waste gases, 1508 F
(658 C)
Solvents such as benzene, carbon disulfide, ether methyl ethyl ketone,
toluene, xylene, trichloroethylene, and trichloroethane willa ttack the resin.
Sulfuric acid above 70% sodiumhydroxide, and 30% chromic acidwill also
attackt he resin. Refer to Table4 .24 for the compatibility of bisphenol-A
fumurate resin with selected corrodents and Table4.25 for the compatibility
of hydrogenated bisphenol-Af umaratep olyesterr esin.R eference [1]
provides additional listings for bothresins.
Corrosion of Linings and Coatings
160
CAT8247—CHAPTER 4—17/10/2006—14:36—SRIDHAR—XML MODEL B–pp. 69–174
stability is improved, and because the number of interior chain ester groups
is reduced, ther esistance to hydrolysis ands aponification increases.
Bisphenol-Ap olyesters havet he besth ydrolysis resistanceo fa ny
commercialu nsaturated polyester.
Theb isphenol polyestersa re superior in their corrosion resistant
properties to the isophthalic polyesters. They show good performance
with moderate alkaline solutions, and excellent resistance to the various
categories of bleaching agents. The bisphenol polyesters willbreak down in
highlyconcentrated alkalies. These resins can be used in the handlingofthe
following materials.
Acids, to 2008 F( 938 C)
Acetic
Fatty acids
Stearic
Benzoic
Hydrochloric, 10%
Sulfonic,3 0%
Boric
Lactic
Tannic
Butyric
Maleic
Tartaric
Chloroacetic, 15%
Oleic
Trichloroacetic, 50%
Chromic, 5%
Oxalic
Rayon spin bath
Citric
Phosphoric, 80%
Salt solutions to 2008 F( 938 C)
All aluminum salts
Cadmium salts
Copper salts
Most ammonium salts
Most plating solutions
Iron salts
Zinc salts
Alkalies
Ammonium hydroxide, 5%
to 1608 F(718 C)
Calcium hypochlorite,2 0 8 F
to 2008 F( 938 C)
Potassium hydroxide, 25%
to 1608 F( 718 C)
Calcium hydroxide, 25% to
1608 F( 718 C)
Chlorine dioxide, 15% to
2008 F(938 C)
Sodium chlorite, to 2008 F
(938 C)
Sodium hydrosulfite, to
2008 F( 938 C)
Solvents
Sour crude oil
Linseed oil
Glycerine
Alcohols at ambient
temperatures
Gases, to 2008 F(938 C)
Carbon dioxide
Sulfur trioxide
Sulfur dioxide, dry
Chlorine, wet
Carbon monoxide
Rayon waste gases, 1508 F
(658 C)
Solvents such as benzene, carbon disulfide, ether methyl ethyl ketone,
toluene, xylene, trichloroethylene, and trichloroethane willa ttack the resin.
Sulfuric acid above 70% sodiumhydroxide, and 30% chromic acidwill also
attackt he resin. Refer to Table4 .24 for the compatibility of bisphenol-A
fumurate resin with selected corrodents and Table4.25 for the compatibility
of hydrogenated bisphenol-Af umaratep olyesterr esin.R eference [1]
provides additional listings for bothresins.
Corrosion of Linings and Coatings
160
CAT8247—CHAPTER 4—17/10/2006—14:36—SRIDHAR—XML MODEL B–pp. 69–174