4,4'-Methylene bis(2-chloroaniline) (or MBOCA) is a synthetic chemical used primarily to make polyurethane products. Pure MBOCA is a colorless, crystalline solid, but the commonly used form is usually yellow, tan, or brown pellets. It has no smell or taste. Examples of these products include gears, gaskets, sport boots, roller skate wheels, shoe soles, rolls and belt drives in cameras, computers and copy machines, wheels and pulleys for escalators and elevators, components in home appliances, and various military applications. It is also used as a coating in chemical reactions to "set" glues, plastics, and adhesives. Because plastics have many uses, MBOCA is widely used.
Curing agent for polyurethanes and
epoxy resins
MOCA (4,4'-Methylene bis(2-chloroaniline)) is widely used in machinery, automobile, aircraft manufacturing, mining, industrial and sports facilities (such as plastic track and plastic floor) can be used for curing and waterproof coatings such as epoxy resin, which can be given to polyester and polyether elastomer most good physical and mechanical properties and the results.
The production of MOCA (4,4'-Methylene bis(2-chloroaniline)) in the United States has ceased
since 1979 and is now imported, mainly from Japan. More
than 1.9 million lb was imported in 1989. The compound is
currently used as a curing agent for isocyanate-containing
polymers and in the manufacture of polyurethane foams,
epoxy resins, gun mounts, jet engine turbine blades, radar
systems, and components in home appliances. It is also a
model compound for studying carcinogenesis.
ChEBI: A chloroaniline that consists of two 2-chloroaniline units joined by a methylene bridge.
Tan-colored pellets or an off-white solid. Slight odor.
4,4'-Methylene bis(2-chloroaniline) is a weak base. Undergoes an exothermic and self-sustaining decomposition reaction when exposed to heat above 392°F, In a closed container, the pressure buildup can be rapid enough to cause an explosion.
Toxic. A confirmed carcinogen, absorbedby skin. Causes bladder cancer and methe-moglobinemia.
4,4￠-Methylene bis(2-chloroaniline),
or MOCA, is carcinogenic in experimental
animals.
Flash point data for 4,4'-Methylene bis(2-chloroaniline) are not available. 4,4'-Methylene bis(2-chloroaniline) is probably combustible.
Flammability and Explosibility
Non flammable
Confirmed carcinogen
with experimental carcinogenic and
tumorigenic data. Poison by ingestion and
intraperitoneal routes. Mutation data
reported. Flammable liquid. Reactive with
active metals such as sodium, potassium,
magnesium, or zinc. When heated to
decomposition it emits very toxic fumes of
Cland NOx.
4,4′-Methylenebis(2-chloroaniline) is reasonably anticipated to be a human carcinogen based on sufficient evidence of carcinogenicity from studies in experimental animals.
