Mirapol A 400 :
a new phosphonated oligomer for fabric and home care applications
A large number of products are well known as scale and
corrosion inhibitors. The problem is that the most effective and commercially
acceptable scaling inhibitors are relatively ineffective and are not used
commercially as corrosion inhibitors and vice versa.
One group of compounds, which has been reported to
both show scale and corrosion inhibiting properties is phosphonosuccinic acid
and its salts. The benefits of these materials have not, however, been
sufficient to have resulted in significant commercial success.
A particularly effective class of scale inhibitors is
2-phosphono-1,2,4-tricarboxybutane and its salts, called “PBTC”. This product
is made through a relatively expensive process and has not been commercially
successful because it is effective at particularly low concentrations. Also,
PBTC is not normally the product of choice for use commercially as a corrosion
inhibitor.
The most cost effective and commercially successful
organic corrosion inhibitors in current use are 2-hydroxy-2-phosphonoacetic
acid and its salts, often known as “HPP”. It has some drawbacks as a corrosion
inhibitor because it is relatively ineffective in the presence of zinc. It is
not very effective as a scale inhibitor.
The Mirapol A 400 (Patent EP 0 491 391 B1 and US
5,606,105) is a neutralized phosphonocarboxylic acid (CAS number :
143239-08-1), that exhibits particularly interesting properties in detergent
and cleaning applications such as laundry, Automatic Dish Washing, Hard Surface
Cleaning among others where these benefits are key. This product provides
anti-scaling benefits while also being a highly effective corrosion inhibitor,
especially in the presence of calcium ions. Mirapol A 400 brings, in many
cases, significant benefits over HPP in the presence of Chlorine or
hypochlorite and is more effective as corrosion inhibitor in the presence of
zinc ions. Mirapol A 400 has been compared to conventional phosphonated
products and exhibits superior performance accross a wide range of
applications.
Application in
Laundry : anti-encrustation and primary detergency
The following formulations have been tested for the
anti-incrustation and primary detergency properties.
¨ Heavy Duty Liquid formulation
:
Dodecyl
benzene sulfonate
|
7.2%
|
Ethanol
|
0.7 %
|
Rhodasurf
ID 060
|
4%
|
Glycerol
|
7.2%
|
Sodium
Sulfate
|
0.7%
|
RHODIAPHOS
HPA 3.5
|
24 %
|
RHODORSIL
20471 LV
|
0.3 %
|
MIRAPOL
A 400
|
0.5% active
|
Water
(deionised)
|
Up to 100%
|
¨ Zeolithe based powder with
Bleach :
LABS / non ionic = 0.5
|
LABS / non ionic = 3.3
|
Zeolithe 4A : 25%
|
Zeolithe 4A : 25%
|
Sokalan CP5 : 5%
|
Sokalan CP5 : 5%
|
NABION 15
Silicate soda ash cogranule : 8%
|
NABION 15
Silicate soda ash cogranule : 8%
|
LABS : 6%
|
LABS : 10%
|
Synperonic A9: 9%
|
Synperonic A7 : 3
|
Synperonic A3 : 3%
|
|
Perborate : 15%
|
Perborate : 12%
|
TAED : 5%
|
TAED : 5%
|
Savinase : 0.5%
|
Esperase 6T : 0.3%
|
CMC : 1.5%
|
CMC : 1%
|
Mirapol A 400 : 0.1 to 0.6 % active
|
Mirapol A 400 : 0.1 to 0...
|