Eastman™ DMCD

Application/Uses

- Automotive OEM
- Coatings for Automotive Plastics
- Modifier for high molecular weight thermoplastic polymers
- Polyester polyols for polyurethane coatings
- Polyester-melamine baking enamels
- Unsaturated polyester resins for gel coats
- Waterborne polyester resins

Key Attributes

- Excellent hardness/flexibility balance
- Excellent weathering
- Good hydrolytic stability
- Improved chemical, stain, corrosion, and humidity resistance
- Low color
- Lower resin solution viscosity compared to aromatic acids

Product Description

Eastman™ DMCD (Dimethyl 1,4-Cyclohexanedicarboxylate) is a low melting, cycloaliphatic diester used for the synthesis of polyester resins, polyamides, alkyds, and plasticizers. Coatings formulated with DMCD bring excellent hardness/flexibility balance and good chemical, stain, humidity, and corrosion resistance to polyester-melamine baking enamels for appliance, general metal, and automotive applications. Its outstanding hydrolytic stability makes it a good choice in waterborne polyester resins for automotive, industrial maintenance, and general metal applications. DMCD can be used to make polyester polyols for polyurethane coatings for automotive, industrial maintenance, transportation, and aerospace applications as well.

Many of these unique performance properties are similar to those offered by Eastman™ 1,4CHDA, but unlike CHDA, the reaction of DMCD with glycols or polyols is a transesterification. Methanol, rather than water, evolves from the reaction. DMCD must be reacted in the first stage of a cook with glycols and polyols only. The first stage is processed until methanol no longer evolves, which indicates the reaction is complete. Diacid components are then added in the second stage.

Eastman™ DMCD is a mixture of cis and trans isomers. It is available as a partially crystallized liquid in drums or in molten form via tank truck. For more information or to request a sample, contact an Eastman Technical Service Representative.

Typical Properties

Property	Typical Value, Units
Molecular Weight	200.23
Empirical Formula	C10H16O4
Appearance	Partially Crystallized Liquid
Assay	93 wt % min.
Acid Number (mg KOH/g)	20 max.
Color, Pt-Co Scale	10 max.
Methyl 4-methylcyclohexanecarboxylate	1.6%
Methyl 4-hydroxymethylcyclohexanecarboxylate	0.7%
Aromatics, as Dimethyl Terephthalate	0.1 wt % max.
Water	0.6 wt % max.
Stereoisomer Ratio	67 cis/33 trans
Boiling Point @ 760 mm Hg @ 100 mm Hg	259°C (498°F) 176°C (349°F)
Viscosity, Brookfield @ 20°C (68°F) @ 31.5 °C (88.7°F) @ 44°C (111.2°F) @ 60°C (140°F)	8 cP 3.9 cP 3.3 cP 2.2 cP
Vapor Pressure @ 85.1°C (185.2°F) @ 170.8°C (339.4°F) @ 228.2°C (442.8°F) @ 247.7°C (477.9°F) @ 265°C (509°F)	1 mm Hg 50 mm Hg 300 mm Hg 500 mm Hg 760 mm Hg
Melting Point Cis Stereoisomer Trans Stereoisomer	14°C (57.2°F) 71°C (159.8°F)
Specific Gravity@ 35°C/4°C	1.102
Solubility In Water, g/100g Solvent, @ 25°C (77°F) Water In, g/100g Solvent, @ 25°C (77°F)	1.2 g 1.6 g
Heat of Combustion	26.69 mJ/kg (11494 Btu/lb)
Heat of Fusion, Trans-isomer	0.11 mJ/kg (47.74 Btu/lb)
Flash PointTag Open Cup	132°C (270°F)
Fire PointTag Open Cup	142°C (287°F)
Autoignition Temperature	388°C (730°F)
Flammability Limits in Air, % by Volume Lower @ 150°C (302°F) Upper @ 184°C (363.2°F)	0.77 Vol % 5.6 Vol %

Comments

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.