DIMER ACID

CAS Registry Number: 61788-89-4
Molecular Formula: C36H64O4
Molecular Weight: 560.91

Dimer acids, or dimerized fatty acids, are dicarboxylic acids prepared by dimerizing unsaturated fatty acids obtained from tall oil, usually on clay catalysts. 
The CAS number of Dimer acid is [61788-89-4]. 
Dimer acids are used primarily for synthesis of polyamide resins and polyamide hot melt adhesives. 
Dimer acids are also used in alkyd resins, adhesives, surfactants, as fuel oil additives, lubricants, etc.
Dimer acid is a light yellow or yellow viscous transparent liquid.

Dimer acid usually contains predominantly a dimer of stearic acid. 
Dimer acid is also called C36 dimer acid.
Trimer acid is a corresponding material where the resulting molecule consists of three fatty acid molecules. 
Dimer acids can be converted to dimer amines by reaction with ammonia and subsequent reduction.

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

Dimer acids, also known as dimerized fatty acids, are dicarboxylic acids that are made by dimerizing unsaturated fatty acids obtained from tall oil, oleic acid, canola, or cottonseed oil, generally on clay catalysts. 
Dimer acids are also used in the manufacture of alkyd resins, adhesives, surfactants, as fuel oil additives, and lubricant.

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

Dimer Acids and Trimer Acids
Dimer acids (dimerized fatty acids) are dicarboxylic acids produced by dimerizing unsaturated fatty acids obtained from tall oil, oleic acid, canola oil or cottonseed oil, usually on clay catalysts. 
Dimer acids can be used to synthesize polyamide resins and hot melt adhesives. 
They are also used in alkyd resins, adhesives, surfactants, fuel oil additives and lubricants. 
Dimer acids are light yellow transparent viscous liquids. 
They are also non-toxic.

A dimer acid of predominantly stearic acid is termed a C36 dimer acid. 
The chemistry can be taken further to form a trimer acid where the product consists of three fatty acid molecules.
Univar offers dimer acids produced from oleic acid, canola oil and tall oil fatty acids.
View our dimer acid and trimer acid products below as well as Dimer and Trimer Acid Products we offer, or contact us for a quote.

Dimer acid-based polyamides were synthesized by condensation polymerization in the absence and presence of monofunctional reactants. 
Acetic acid, oleic acid and propyl amine were used as monofunctional reactants. 
The influences of the equivalent percentage (E%) and type of monofunctional reactant on the physical properties of dimer acid-based polyamides such as glass transition temperature (T-g), melting point (T-m), heat of fusion (Delta H), degree of polymerization (DP), number average molecular weight (M-n), and kinematic viscosity were investigated. 
The molecular weight and viscosity of dimer acid-based polyamides decreased with the increase in equivalent percentage of monofunctional reactant. 
Differential scanning calorimetry (DSC) studies showed that acetic acid and propyl amine had higher effect on the thermal properties of polyamides than that of oleic acid. 
In the case of polyamides prepared in the presence of acetic acid, the values of T-g, T-m, and Delta H of the polyamides increased remarkably with the increase in acetic acid content. 

On the contrary, propyl amine had a decreasing effect on the values of T-g, T-m, and Delta H of the polyamides. 
Incorporation of oleic acid into the polymer structure had no significant effect on the values of T-g and T-m of the dimer acid-based polyamides.
Dimer acid is a light yellow or yellow, viscous, non-toxic, transparent liquid. 
Dimer acids molecular formula is C36H68O4. 
Dimer acids CAS number is 61788-89-4. 
Dimer acids are primarily used to synthesize polyamide resins and hot melt adhesives.

CAS No.: 61788-89-4
Synonyms: dimerized fatty acids
Mainly Dimer acids are used for synthesis of polyamide resins and polyamide hot melt adhesives.

Production of Dimer acid:
Dimer fatty acids are produced from different fatty acids by heating. 
Necessary are a fatty acid with conjugated double bonds or other unsaturated fatty acids. 
Examples of such fatty acids are conjugated linoleic acids. 
The reaction is carried out via Diels-Alder addition, whereby a partially unsaturated C6 ring is formed.
Besides the dimer, trimers as well as (unreacted) monomers of the fatty acids may be present in the mixture.

Dimer acids also known as dimerized fatty acids are known to be dicarboxylic acids that are produced by a process of dimerizing unsaturated fatty acids. 
These unsaturated fatty acids are obtained from fatty acid feedstock such as tallow oil, rapeseed oil and tall oil among others. 
Crude dimer is produced from tall oil fatty acid by heat treatment with or without use of a suitable catalyst. 
They act as building blocks for several end-products due to its di-carboxylic acid reactivity. 
Dimeric acids usually consist of stearic acids, therefore called as C36 dimer acid. 
This chemistry of Dimer acid can further produce trimer acid comprising of three fatty acid molecules. 
Dimer acids are transparent light yellow colored viscous liquids which are non-toxic in nature.

Name: C36 Dimer acid
Synonyms: Fatty acids C18-unsatd dimers; (Octadecadienoic acid) dipolymer
Molecular Formula: C36H64O4
Molecular Weight: 560.91
CAS Registry Number: 61788-89-4

Dimer Acid is a distilled dimer acid that provids high dimer acid content with a very low monomer and low trimer content and improved color and color stability. 
This dimer acid is designed for use in high quality, high molecular weight, low color polyamide resins and specialty polyesters. 
Other uses include: surfactants, urethane polymers, ink resins, various surface coatings, hot melt adhesives and lubricants.

Dimer acid (DA) was grafted onto lignin (EHL) to form a graft copolymer DA-g-EHL. 
The selection of the reaction type and the optimization of the reaction conditions for the grafting reaction were conducted through orthogonal and single factor experiments. 
FT-IR and thermal analysis were used to characterize the graft product. 
Dimer acid was found that, compared with free radical grafting, DA can be grafted onto EHL more effectively by ester condensation with strongly acidic cation exchange resin as a catalyst. 
Under optimum reaction conditions, the increase of acid value and the yield of graft copolymer can reach about 9.3% and 83%, respectively. 
The application of DA-g-EHL in preparing modified phenolic aldehyde amine curing agent (PAA) was studied. 
Results showed that the flexibility of the epoxy resin cured by DA-g-EHL modified PAA is significant higher than that of the resin cured by EHL modified PAA. 
The graft of DA onto EHL may reduce the rigidity of EHL and the chain stiffness of the PAA modified by EHL.

Dimer acid is a mixture which contains mainly C36 di-functional fatty acid and C54 tri-functional fatty acid with a natural origin.  
Dimer acid is in the form of yellow viscous liquid.

The dimer acid-based polyamide (DAPA) was prepared by polymerization of dimer acid and ethylenediamine. 
And the film was prepared by the solution casting method, in which tetrahydrofuran was used as the solvent. 
Glycerol is introduced into the film by adding glycerol together with tetrahydrofuran and smearing it on the glassware before the film’s formation. 
The paper has evaluated the DAPA film packaging performance, which has rarely been studied, such as oxygen barrier property and optical properties. 
Through forming the film by the two means of adding glycerol, the paper has studied its property on the mechanic, morphology, oxygen barrier. 
The results of which show the differentiation of producing film in two ways. 
The tensile strength and elongation at break were increased by 80% and 228%. 
And the oxygen permeability was 0.00732 cm2/m2·dpa. The thermal processability of the film has been improved. 
Compared with other bio-based film, the DAPA film with glycerol solution has excellent mechanical properties, barrier property, and optical properties.

mol wt:  average Mn ~570
Quality Level: 100,
impurities:
≤0.1 wt. % monomer
<0.1 wt. % trimer
refractive index: n20/D 1.477 (lit.)
viscosity: 8,000 mPa.s(25 °C)(lit.)
acid number: 194‑198 mg KOH/g
iodine value: <10
saponification value: 196‑200 mg KOH/g
transition temp: pour point ~0 °C
density: 0.95 g/mL at 25 °C (lit.)

New dimer acid-based-polyamides were synthesized with rapeseed oil-based dimer acid (DA) and 1,2-diaminoethane, 1,6-diaminohexane or 1,8-diaminooctane to form DAPAe, DAPAh and DAPAo, respectively. 
Effects of diamine chain lengths on kinetics evolution as well as on the thermal, physical and mechanical properties of the different polyamides synthesized were investigated. 
DAPAo was found to be the most reactive diamine because of its higher nucleophilic character.
Differential scanning calorimetry (DSC) combined with X-ray diffraction revealed a low-order semi-crystalline structure for all polyamides. 
A tentative schema for the structural organization of these DAPA is proposed and shows a specific organization with local semi-crystalline segregation domains. 
DAPAe was found to possess the higher melting temperature likely due to higher crystal cohesion, which was confirmed by higher Young modulus in stress-strain experiments. 
Rheological data showed an increase of the glass transition temperature concomitantly with the increase of diamine chain length. 
They also revealed an increase of complex viscosity with the diamine chain length. 
Investigation of thermal stability showed that DAPAe degrades before DAPAh and DAPAo in connection with the number of methylene units per diamine.

Dimer Acid are used to manufacture polyester polyols and as building blocks or modifying agents in resins such as Polyamides, Polyester and Epoxies. 
Dimer acid has major applications in hot melt adhesives, coatings and ink resins.

Density: 0.9±0.1 g/cm3
Boiling Point: 667.7±28.0 °C at 760 mmHg
Molecular Formula: C36H68O4
Molecular Weight: 564.923
Flash Point: 371.6±20.5 °C
Exact Mass: 564.511780
PSA: 74.60000
LogP: 14.79
Vapour Pressure: 0.0±4.4 mmHg at 25°C
Index of Refraction: 1.479

What Are Dimers?
Did you know that dimers are found in many substances from sugars to chemicals and proteins? How about we learn about these compounds to understand why they're so popular?

Dimers are oligomers composed of two monomers that are similar in structure and joined by a chemical bond. 
A great analogy is to think of dimers as a city that has a bridge connecting two small towns together. 
I know, you may be wondering, olio-who? Oligomers are molecular complexes made of little units called monomers. 
Just think of a molecular complex as a big chemical glob that has a bunch of parts to it. 
A great example of a type of oligomer is hemoglobin which is found in red blood cells in our blood. 
As you can see, hemoglobin has four monomers linked to make one huge glob, or oligomer.

Depending on how many monomers you have in one oligomer, the name of the structure will change. 
So three monomers linked would be an oligomer named trimer. 
Four monomers linked together would be an oligomer named tetramer.
But wait, what is a monomer? 
A monomer is a molecule that loves to bind chemically with other molecules. 
Think of a monomer as a small tough guy that loves to network and build a web of friends. 
If we put all of this together, a dimer is a type of oligomer. 
But monomers are the building blocks for dimers and all oligomers.

Dimer Formation
Think back to our first example. 
Would hemoglobin be called a dimer? 
Let's explore the structure of dimers and then go back to answering that question. 
As we learned earlier, dimers contain monomers linked together. 
To break this down further, take a look at the word dimer. 
The prefix 'di-' means two. 
The suffix '-mer' means parts. 
Thus a dimer would be two parts. 
In this case those parts are monomers. 
Here you see black blocks symbolizing the link to be formed between both monomer units.

This link is called a bond. For dimers, this bond can be strong or weak. 
Dimer acid can also be classified into two categories: non-covalent or covalent. 
Non-covalent dimers, as the name suggests, use non-covalent bonds to link monomers together. 
A non-covalent bond is any chemical bond that does not involve sharing of electrons. 
These bonds form when molecules want to link up but don't want to share their electrons to do so. 
For dimers, a great example of a non-covalent dimer is a hydrogen bond.
Here's an example of a non-covalent dimer using hydrogen bonding. 
The individual monomer subunits linked together are circled.

Common Name: C36 dimer acid
CAS Number: 61788-89-4    
Molecular Weight: 564.923
Density: 0.9±0.1 g/cm3    
Boiling Point: 667.7±28.0 °C at 760 mmHg
Molecular Formula: C36H68O4    
Melting Point: N/A
MSDS: N/A    
Flash Point: 371.6±20.5 °C

Dimer acid is the main material in the synthesis of bioelastomer. 
The preparation of dimer acid from vegetable oil such as crude palm oil and jatropha seed oil via Diels-Alder reaction were investigated. 
The dimer acid based vegetable oil was obtained by reacting vegetable oil with 12% by weight of acrylic acid and 0.05 – 0.15% by weight of iodine catalyst at temperature 191.25 – 247.5 oC for 1 – 2 hours. 
Dimer acids were analyzed using Fourier transform infrared spectroscopy, degree of acidity and acid value determination. 
The results show that the degree acidity (pH) of dimer acid from crude palm oil and jatropha seed oil were 2.18 – 2.35 and 2.46 – 2.56, respectively. 
The acid value of dimer acid from palm oil is 89.07 – 90.07 mg KOH/gsample and acid value of dimer acid from the jatropha seed oil is 63.80 – 80.43 mg KOH/g sample. 
Although the acid value is still lower than the commercial dimer acid, the FTIR results showed that both dimer acids had some dicarboxylic acid functional groups as appeared in Empol 1016. 
So both vegetable oils have potential as a raw material for bioelastomer synthesis. 

Dimer Acid: Dimer acid is stearic acid base, amber viscous liquid, prepared by dimerizing unsaturated fatty acids obtained from tall oil. 
Majorly used in manufacturing of polyamide resins, polyamide hot melts adhesives, lubricating grease.

Fatty acids, C18-unsatd., dimers
61788-89-4
C36 Dimer acid
C18-Unsatd. fatty acids dimers
Fatty acids, C18 unsaturated dimers
DIMERACID
Fatty acid, C-18-unsaturated, dimers
9-[(Z)-non-3-enyl]-10-octylnonadecanedioic acid
EC 500-148-0
SCHEMBL633756
DTXSID70873445
9-[(3Z)-non-3-en-1-yl]-10-octylnonadecanedioic acid
1572670-81-5
1,2-Ethanediamine, polymer with (Z,Z)-9,12-octadecadienoic acid dimer
Ethylenediamine - linoleic acid dimer copolymer
Ethylenediamine - linoleic acid dimer polymer
Ethylenediamine, linoleic acid dimer polymer
Linoleic acid dimer - ethylenediamine copolymer
Poly(ethylenedilinoleamide)
Versamid 140
Versamid 754
Versamid 900
1,2-Ethanediamine, polymer with (9Z,12Z)-9,12-octadecadienoic acid dimer
9,12-Octadecadienoic acid (9Z,12Z)-, dimer, polymer with 1,2-ethanediamine
9,12-Octadecadienoic acid (Z,Z)-, dimer, polymer with 1,2-ethanediamine
Poly(ethylenediamine-co-linoleic acid dimer)
C36 DIMER ACID
C36 Dimer acidC
Dimer Fatty acid
FATTYACIDS,DIMERACIDS
High purity dimer acid
C18-Unsatd.fattyacidsdimers
Fatty acids, diMeracids, C18
Dimerfettsure, C18, ungesttigt
Fatty acids, C18-unsatd., dimers
(Octadecadienoic acid) dipolymer

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