Chemistry Reference
In-Depth Information
The mono- or diester of MA can be obtained by controlling the ratio of polyoxyethylene
and MA during the reaction. Anionic surfactants of rosin alcohol polyoxyethylene
monoether sodium monosulfosuccinates (A12) can be synthesised by two steps of
reactions (
Scheme 5.20
). The influence of the degree of polymerisation of ethylene
oxide on the physical and chemical properties of the products was also studied [38].
The sodium sulfosuccinate diester of disproportionated rosin alcohol polyoxylethylene
ether (A13) can be synthesised from disproportionated rosin alcohol polyoxylethylene
ether by changing the molar ratio of the two reaction components (
Scheme 5.21
) [39].
Scheme 5.20
Synthesis of rosin alcohol polyoxyethylene monoether sodium
monosulfosuccinates (A12)
Scheme 5.21
Synthesis of sodium sulfosuccinate diester of disproportionated rosin
alcohol polyoxylethylene ether (A13)
Rosin acids can be changed into acid chlorides, salts and amines, which greatly improve
the reactivity. The chlorides, salts and amines can be reacted with a sulphonate-
containing alcohol (
Scheme 5.22
) to form sulfonate surfactants under ambient
conditions (A14-A16). Jia and co-workers
reported using dehydroabietylamine, α,
ω-dibromoalkane and sodium 2-bromoethylsulfonate as raw materials (
Scheme 5.23
)
for synthesising new gemini anionic surfactants (
N
,
N
′-Sodium-2-diethylsulfonate-
N
,
N
′-didehydroabietate- α ω-diamines [A17]). [40]
