2-Methylpentamethylenediamine is an

organic compound In chemistry, organic compounds are generally any chemical compounds that contain carbon-hydrogen or carbon-carbon bonds. Due to carbon's ability to catenate (form chains with other carbon atoms), millions of organic compounds are known. T ...

part of the

amine In chemistry, amines (, ) are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (), wherein one or more hydrogen Hydrogen is the chemical element wi ...

family with the formula H₂NCH₂CH₂CH₂CH(CH₃)CCH₂NCH₂. A colorless liquid, this

diamine A diamine is an amine with exactly two amino groups. Diamines are used as monomers to prepare polyamides, polyimides, and polyureas. The term ''diamine'' refers mostly to primary diamines, as those are the most reactive. In terms of quantities p ...

is obtained by the hydrogenation of 2-methylglutaronitrile.

Uses

2-Methylpentamethylenediamine serves as a

curing agent Curing is a chemical process employed in polymer chemistry and process engineering that produces the toughening or hardening of a polymer material by cross-linking of polymer chains. Even if it is strongly associated with the production of thermo ...

. It gives good

adhesion Adhesion is the tendency of dissimilar particles or surfaces to cling to one another ( cohesion refers to the tendency of similar or identical particles/surfaces to cling to one another). The forces that cause adhesion and cohesion can b ...

for

metal A metal (from Greek μέταλλον ''métallon'', "mine, quarry, metal") is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typicall ...

s and resistance against

corrosion Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engi ...

and other chemicals. It provides toughness, low blush, uniform finish, high gloss, and improves UV stability. It reduces gel time and is compatible with epoxy resins. It is suitable for marine, industrial, and decorative

coating A coating is a covering that is applied to the surface of an object, usually referred to as the substrate. The purpose of applying the coating may be decorative, functional, or both. Coatings may be applied as liquids, gases or solids e.g. Pow ...

s. 2-Methylpentamethylenediamine can also be used as a chain extender for

polyurethane Polyurethane (; often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links. In contrast to other common polymers such as polyethylene and polystyrene, polyurethane is produced from ...

applications. Its derivatives like aspartic

ester In chemistry, an ester is a compound derived from an oxoacid (organic or inorganic) in which at least one hydroxyl group () is replaced by an alkoxy group (), as in the substitution reaction of a carboxylic acid and an alcohol. Glycerides a ...

s, secondary

s, aldimines and ketoimines serve as curatives in systems of

polyurea Polyurea is a type of elastomer that is derived from the reaction product of an isocyanate component and a synthetic resin blend component through step-growth polymerization. The isocyanate can be aromatic or aliphatic in nature. It can be mon ...

. In

polyamide A polyamide is a polymer with repeating units linked by amide bonds. Polyamides occur both naturally and artificially. Examples of naturally occurring polyamides are proteins, such as wool and silk. Artificially made polyamides can be made through ...

s, 2-Methylpentamethylenediamine acts as a crystallinity disruptor. This makes

polymer A polymer (; Greek '' poly-'', "many" + ''-mer'', "part") is a substance or material consisting of very large molecules called macromolecules, composed of many repeating subunits. Due to their broad spectrum of properties, both synthetic a ...

s amorphous in structure and slows down crystallization. It lowers

melting point The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depen ...

, improves surface appearance, increases

abrasion resistance Abrasion is the process of scuffing, scratching, wearing down, marring, or rubbing away. It can be intentionally imposed in a controlled process using an abrasive. Abrasion can be an undesirable effect of exposure to normal use or exposure to t ...

, and dye uptake. It also reduces water absorption, gelling, melt and quench temperatures. In summary, its uses are: * Corrosion inhibitor * Polyamide adhesive and ink resins. * Polyamide films, plastics, and fibers * Epoxy curing agents * Metalworking Fluids * Chain extenders * Water treatment chemicals * Isocyanates

Hazards

Even though 2-Methylpentamethylenediamine has many uses, it also has many hazards. It can cause burns, is corrosive to skin, harmful when swallowed, and it can cause

pulmonary edema Pulmonary edema, also known as pulmonary congestion, is excessive liquid accumulation in the tissue and air spaces (usually alveoli) of the lungs. It leads to impaired gas exchange and may cause hypoxemia and respiratory failure. It is due t ...

and acute

pneumonitis Pneumonitis describes general inflammation of lung tissue. Possible causative agents include radiation therapy of the chest, exposure to medications used during chemo-therapy, the inhalation of debris (e.g., animal dander), aspiration, herbicide ...

when inhaled in high concentrations.{{Cite web, title=2-Methylpentamethylenediamine - Hazardous Agents {{! Haz-Map, url=https://haz-map.com/Agents/2224?referer=BrowseByAlphabet&return_url=/Agents/(BrowseByAlphabet)/M, access-date=2021-04-07, website=haz-map.com

References

External links

* http://www.chemspider.com/Chemical-Structure.77450.html * https://webbook.nist.gov/cgi/cbook.cgi?ID=15520-10-2 Amines