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Chemicals - Applications |
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| Coatings |
| Market Overview |
This section covers Coatings and other related markets.
These would include: paints, inks, resins, pigments, and adhesives.
Varsal products can be utilized in various uses such as solvents,
curing agents, pigment intermediates, and polymer catalysts. Key products
are: Methanesulfonic acid (MSA), n-octyl pyrrolidone, dimethyl sulfone,
and pyridines. |
| Products/Applications |
| Methanesulfonic Acid (MSA) |
| MSA has three key uses in the manufacture of environmentally
friendly coatings. First, MSA serves as an acid catalyst in polymerization
(see Polymerization section). Second, it can serve as a solvent. Third,
it can be used as a curing agent for low-temperature applications.
MSA is a biodegradable and recyclable agent that has utility in making
low VOC coatings including waterborne, powder, and UV-cured systems.
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| The anhydrous version of MSA can be used as a dehydrator.
Since the anhydride converts to the acid during the reaction stage,
a single recovery can be used. MSA can be recovered through a simple,
low temperature distillation. This can offer a convenient and economical
process to produce resins such as polyether-ketones, unsaturated polyesters,
and starch ester-urethanes. |
| Cellulose esters can be modified in the presence of
an acid catalyst such as MSA to achieve a superior coating material
having both thermoplastic and thermoset properties. The cellulose
ester is modified by grafting a melamine moiety to it. MSA is used
as the acid catalyst for the grafting reaction. It can also be used
to promote self-crosslinking in the curing stage at low temperatures
(70 -120oC). |
MSA can be used for control of thickening of a large
variety of polymerizable materials. When polyisocyanate or trimerization
catalysts are used for thickening, the reaction can be quenched by
the destruction of the catalyst using MSA or a mixture of MSA and
oxalic acid. The addition of an acid to neutralize such catalysts
is effective to impart extended shelf life to the products, particularly
in the case of solutions containing at least 40% by weight of dissolved
solids.
Other applications for MSA include:
- Conversion catalyst of amino-alkyd, urethane, and emulsion coatings
- Gellation preventative of fumaric and maleic esters w/ vinyl
esters
- High speed/low temperature curing agent
- Solvent in polyether sulfones and polysiloxanes
- Hardening of certain resins (catalyst for aminoplastic and phenoplastic
resins).
N-octyl pyrrolidone, dimethyl sulfone and acetates - used as solvents
Pyridines, sulfonamides, naphthalic anhydrides- intermediates in pigment
manufacture
Para-hydroxy benzoic acid- utilized in the production of liquid crystal
polymers
Sodium hypophosphite- reducing agent for emulsion polymers
Dioic acids- for use in powder coating resins |
Table -Coatings Key Products
| Product |
Purity % |
CAS # |
Appearance |
Hazard Class |
| Methane Sulfonic Acid |
70 |
75-75-2 |
Transparent oily liquid |
8 |
| Methane Sulfonic Acid |
85 |
75-75-2 |
Transparent oily liquid |
8 |
| Methane Sulfonic Acid |
99 |
75-75-2 |
Transparent oily liquid |
8 |
| Sodium hypophosphite |
103 |
10039-56-2 |
White powder |
Non-hazardous |
| Sodium Acetate |
63 |
127-09-3 |
White powder |
Non-hazardous |
| N-Octyl Pyrrolidone |
98 |
2687-94-7 |
Pale yellow liquid |
8 |
| Para hydroxy benzoic acid |
99 |
99-96-7 |
White to off-white powder |
Non-hazardous |
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