1.3.1.5 Vinyl Ester and VinylEster Novolac
Chemically,these resins are addition reactions of methacrylic acidand epoxy
resin. The chemistryofthese resins has prompted theirbeingreferred to as
acrylatedepoxies. Theypossessmany of the properties of epoxy,acrylic, and
bisphenol Afumarate polyester resins. Their similarity to these resins means
that they exhibit the same outstanding chemical resistance and physical
properties of mortars and grouts formulated from these resins.
The vinyl esters are generallyl ess rigid with lower shrinkage than many
polyester systems. Theyf avorably comparew ith the optimum chemicalresistant bisphenol Af umurate polyester mortars and grouts. The major
advantage of the variousv inyl ester systems are
1. Resistance to most oxidizingm ediums
2. Resistance to high concentrations of sulfuric acid,s odium
hydroxide, and manys olvents
The vinyle ster resin mortars have supplanted the polyestera nd have
become the mortaro fc hoice for brick-lined bleach towers in the pulp
and paper industry.L ike polyesters, vinyl ester formulationsh ave similar
inherent disadvantages:
1. Strong aromatic odor for indoor or confineds pacea pplications.
Isolation of area where installations are beingm ade may be
TABLE 1.6
Comparison of Corrosion Resistance of Polyester Mortars
Corrodent at Room
Te mperature
Polyester
a
Chlorendic
Bisphenol AFumarate
Acetic acid, glacial
UU
Benzene
UU
Chlorine dioxide
RR
Ethyl alcohol
RR
Hydrochloric acid, 36%
RR
Hydrogen peroxide
RU
Methanol
RR
Methyl ethyl ketone
UU
Motor oil and gasoline
RR
Nitric acid, 40%
RU
Phenol, 5%
RR
Sodium hydroxide, 50%
UR
Sulfuric acid, 75%
RU
Toluene
UU
TriethanolamineU
R
Vinyl toluene
UU
a R, recommended; U, unsatisfactory.
Corrosion of Linings and Coatings
12
CAT8247—CHAPTER 1—6/10/2006—11:59—SRIDHAR—XML MODEL B–pp. 1–42
Chemically,these resins are addition reactions of methacrylic acidand epoxy
resin. The chemistryofthese resins has prompted theirbeingreferred to as
acrylatedepoxies. Theypossessmany of the properties of epoxy,acrylic, and
bisphenol Afumarate polyester resins. Their similarity to these resins means
that they exhibit the same outstanding chemical resistance and physical
properties of mortars and grouts formulated from these resins.
The vinyl esters are generallyl ess rigid with lower shrinkage than many
polyester systems. Theyf avorably comparew ith the optimum chemicalresistant bisphenol Af umurate polyester mortars and grouts. The major
advantage of the variousv inyl ester systems are
1. Resistance to most oxidizingm ediums
2. Resistance to high concentrations of sulfuric acid,s odium
hydroxide, and manys olvents
The vinyle ster resin mortars have supplanted the polyestera nd have
become the mortaro fc hoice for brick-lined bleach towers in the pulp
and paper industry.L ike polyesters, vinyl ester formulationsh ave similar
inherent disadvantages:
1. Strong aromatic odor for indoor or confineds pacea pplications.
Isolation of area where installations are beingm ade may be
TABLE 1.6
Comparison of Corrosion Resistance of Polyester Mortars
Corrodent at Room
Te mperature
Polyester
a
Chlorendic
Bisphenol AFumarate
Acetic acid, glacial
UU
Benzene
UU
Chlorine dioxide
RR
Ethyl alcohol
RR
Hydrochloric acid, 36%
RR
Hydrogen peroxide
RU
Methanol
RR
Methyl ethyl ketone
UU
Motor oil and gasoline
RR
Nitric acid, 40%
RU
Phenol, 5%
RR
Sodium hydroxide, 50%
UR
Sulfuric acid, 75%
RU
Toluene
UU
TriethanolamineU
R
Vinyl toluene
UU
a R, recommended; U, unsatisfactory.
Corrosion of Linings and Coatings
12
CAT8247—CHAPTER 1—6/10/2006—11:59—SRIDHAR—XML MODEL B–pp. 1–42