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Torlon® AI is a family of soluble polyamide-imides sold in powder form. The polymer is tough, chemically resistant, and thermally stable. It has thermal capability similar to many polyimides, at a lower price. Coatings based on AI polymers have been shown to be cost-effective in electrical/electronic, high-temperature decorative, and corrosion prevention applications. |
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Torlon® AI-10, AI-10 LMTorlon® AI-30, AI-50Torlon® 4000T, 4000TFProperty ComparisonPigments & AdditivesProcessing
Torlon® AI-10
 Torlon® AI-10 powder has an impressive record of proven performance in high-temperature coatings and adhesives. These include electrical wire coatings, corrosion-resistant coatings, non-stick cookware coatings, and industrial lowfriction coatings.
Torlon® AI-10 is soluble in dipolar aprotic solvents such as N-methyl pyrrolidone (NMP), dimethyl acetamide (DMAC), dimethyl formamide (DMF) and dimethyl sulfoxide (DMSO) to at least 35% solids. Mixtures of these solvents with other diluents are possible. Cast solutions are thermally cured up to 250-300°C (480-570°F) to achieve maximum performance properties. Please see Torlon AI-10 Coatings for more information.
Data Sheet: Torlon AI-10
Torlon® AI-10 LM
Torlon® AI-10 LM is similar to Torlon® AI-10 in that it is produced using the same monomers and polymerization system. However, the manufacturing process has been optimized to reduce the amount of residual methylene dianiline (MDA) monomer to below the 1,000 ppm action level specifi ed in various hazard communication regulations.
Torlon® AI-10 LM can be substituted for Torlon® AI-10, without any changes in formulation or process. Coatings based on the Torlon® AI-10 or AI-10 LM polymer yield durable, abrasion-resistant, thermally-stable films.
Data Sheet: Torlon AI-10 LM
Torlon® AI-30
 Torlon® AI-30 is the water-soluble analog of Torlon® AI-10 and consists of 35% solids, 63% water and 2% NMP. It is made water soluble by forming an ammonium salt with the amic acid groups on the polymer backbone. Aqueousbased solutions made with Torlon AI-30 have inherently low VOCs, which helps end users meet stringent environmental regulations. Cast solutions are thermally cured at temperatures up to 250-300°C (480-570°F) for maximum performance properties.
Torlon® AI-50
Torlon® AI-50 is the water soluble analog of 4000TF. It is similar to Torlon® AI-30 in solids composition, yet offers a lower viscosity and the associated processing advantages. Cast solutions are thermally cured up to 250-300°C (480-570°F) for maximum performance properties.
Torlon® 4000T, Torlon® 4000TF
Torlon® 4000T differs from AI-10 in that it is made from different diamines and has a greater degree of imidization. Methylene dianiline (MDA) is not used in the manufacture of Torlon 4000T resins. Similar to Torlon® AI-10, this material is soluble in dipolar aprotic solvents such as NMP, DMAC, DMF, and DMSO to at least 35% solids. Cast solutions are thermally cured up to 250-300°C (480-570°F) to achieve maximum performance properties.
It is available in four powder grades, 4000T-LV, 4000T-MV, 4000T-HV, and a finer particle size version, 4000TF. Torlon® 4000TF is a fine powder with 95% of the particles less than 75 microns. Torlon® 4000TF should be used when a defined particle size is important.
Typical Properties
| Typical Properties(1) |
| |
AI-10 |
AI-10 LM |
AI-30 |
AI-50 |
4000
T-LV |
4000
T-MV |
4000
T-HV |
4000
TF |
| Form |
yellow powder |
yellow powder |
wet yellow powder |
wet yellow powder |
yellow powder |
yellow powder |
yellow powder |
fine yellow powder |
| Solids content, % |
90 |
92 |
35 |
35 |
99 |
99 |
99 |
99 |
| Solution viscosity, 25% in NMP, cP |
800(2) |
850(2) |
|
|
7,000(3) |
42,000(3) |
85,000(3) |
7,000(3) |
| Solution viscosity, 7% in water, cP |
|
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650(2) |
20(2) |
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| Acid number, mg KOH/g of polymer |
80 |
82 |
125 |
125 |
20 |
15 |
10 |
20 |
Pigments and Additives
Pigments and additives can be used in conjunction with Torlon® coating resins to produce special purpose coating and adhesive formulations. Suitable additives of this type include heat-stable organic and inorganic pigments, fillers, and certain epoxy and fl uoropolymer copolymers. Due to the inherent color of Torlon® coating resins, care must be taken if white or very pale shades are to be successfully formulated.
To prevent the absorption of unwanted moisture, all pigments should be ground in closed milling equipment. Likewise, hydroscopic additives, such as fibers, copolymers, etc, should be dried to appropriate moisture levels prior to being incorporated into the formulation.
Applying Torlon® AI Powders
Torlon® PAI-based coatings can be effectively applied by spray, roll, spin, or curtain techniques. Usually dry film thicknesses from 10-20 μm are readily achieved in a single coating pass. Greater film thicknesses can be acheived by applying multiple coats.
Regardless of the method employed, it is essential to assure appropriate preparation of the substrate prior to application of coating. Once complete, application equipment should be purged of coating and cleaned with a true solvent.
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