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432369

Sigma-Aldrich

Dimer acid, hydrogenated

average Mn ~570

Synonym(s):

Fatty acids, C18 -unsatd., dimers, hydrogenated, Hydrogenated C36 dimer fatty acid

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About This Item

CAS Number:
68783-41-5
MDL number:
MFCD00211870
UNSPSC Code:
12162002
NACRES:
NA.23

form

liquid

mol wt

average Mn ~570

impurities

<1 wt. % monomer
<2 wt. % trimer

refractive index

n20/D 1.477 (lit.)

viscosity

8,000 mPa.s(25 °C)(lit.)

acid number

190‑198 mg KOH/g

iodine value

<10

transition temp

pour point ~0 °C

density

0.95 g/mL at 25 °C (lit.)

General description

Dimer acid, hydrogenated is a fatty acid with 36 carbon atoms. It consists of a cyclohexene ring which can be synthesized by clay-catalyzed dimerization at 230-250°C.
Improves flexibility, toughness, impact resistance, dyeability and hydrolytic stability of polymers.

Application

Comonomer in polyesters, polyamides and polyurethanes.
Dimer acid, hydrogenated can be used as a corrosion inhibitor for the protection of lead metal substrates. It can also be used in polyamide based hot melting adhesives as a thermoplastic polymer for electronic boards, textiles and packaging systems.

Storage Class Code

10 - Combustible liquids

WGK

WGK 1

Flash Point(F)

572.0 °F - open cup

Flash Point(C)

300 °C - open cup

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKCP5013
MKCM1737
MKCK4786
MKCD8303
MKBT8136V

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Lower purity dimer acid based polyamides used as hot melt adhesives: synthesis and properties
Freitas RFR, et al.
Journal of Adhesion Science and Technology, 29(17), 1860-1872 (2015)
Hydrogenated dimer acid as a corrosion inhibitor for lead metal substrates in acetic acid
De Keersmaecker M, et al.
Journal of the Electrochemical Society, 162(4), C167-C179 (2015)
Study of liquid-crystalline behaviour of aliphatic-aromatic polyamides derived from castor oil based dimer acid by DSC
Khare K, et al.
Indian Journal of Advances in Chemical Science, 2(1), 89-94 (2013)
Selective formation of C36-dimer fatty acids via thiol-ene addition for copolyamide synthesis
Unverferth M and Meier MAR
European Journal of Lipid Science and Technology, 118(10), 1470-1474 (2016)

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