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DIMETHYLAMINOPROPYLAMINE, DMAPA, N,N-Dimethyl-1,3-propanediamine, 3-(Dimethylamino)propylamine, Dimethylaminopropylamine, N,N-Dimethyl-1,3-propanamin, 1-(dimethylamino)-3-aminopropane, N,N-Dimethyl-1,3-diaminopropane, N,N-Dimethyl-1,3-propylenediamine



  • DMAPA is heated with a fatty acid, an amide containing a tertiary amine group is formed. Such amides can be treated with hydrogen peroxide to give amine oxides which show excellent detergent and foam boosting properties.
  • The amide can also be treated with alkyl or aralkyl halides, such as benzyl chloride, to give quaternary ammonium compounds which have been used to prepare smooth and soft textile fibers that are water-resistant and stable to light.
  • Quaternary ammonium compounds are effective as hair-cleaning and washing aids.   Such quaternized amines are water soluble, odorless, and relatively nontoxic to humans.   They are useful as antiseptics, wetting agents, textile dyeing and finishing aids, and emulsifiers.
  • Betaines prepared from DMAPA are used in shampoos and bath preparations to reduce static electricity and improve the body, gloss, and manageability of wet hair, and improve the feel of the skin after a bath.
  • An amphoteric surfactant prepared from DMAPA is used to prepare a shampoo which causes little irritation of the eyes. Properties of gasoline are reported to be improved by the addition of DMAPA or compounds based upon DMAPA.  The reaction product of DMAPA with polyisobutenyl chloride is reported to counteract engine fouling, thereby reducing hydrocarbon   exhaust   gas   emissions.     The   reaction   of   DMAPA   with   polyisobutenyl   chloride   and   α,   β- dibromopropionitrile gives a product which reportedly is an effective carburetor cleaner.   Carburetor detergents have been  prepared  by  reacting  DMAPA  with  alkylphenol  and  an  aldehyde  or  with  thioglycolic  acid  and  chlorinated polyisobutene.
  • Dimethylaminopropylamine has been used for preparing good corrosion inhibitors (amine phosphates) for aviation gasoline. Heating DMAPA and urea yields a product which is useful as an octane requirement reducer.
  • Ash-free  lubricant  additives  were  prepared  by  reacting  DMAPA  with  an  ethylene,  propylene,  or  1,4  hexadiene copolymer. A lubricating oil having dispersancy properties and good viscosity index  contains,  along with other components, a DMAPA-modified hydroperoxidized ethylenepropylene copolymer.  A detergent for a lubricating oil has been prepared from DMAPA reacted with maleic anhydride and an ethylene-propylene copolymer.  A lubricating oil additive effective in improving dispersancy, wear, and corrosion properties has been prepared from DMAPA and an alkyl phenol, formaldehyde, and sulfur.
  • Water dispersible coating compositions useful for preparing electrophoretic coating compositions using the substrate as the cathode are prepared from DMAPA, polybutadiene, and maleic anhydride.  These coatings can also be prepared from DMAPA, an epoxy resin, acetic acid, and an unsaturated monoisocyanate.  A polybutadiene derivative and an epoxy resin derivative are combined to prepare a coating composition  which  gives hardened coatings with good corrosion resistance.
  • Polyester  films  and fibers  treated  with  DMAPA  have  a  reduced  tendency to  develop  static  electricity  and  their receptivity to acid wool dyes is greatly improved.   An amide made from stearic acid and the amine is used as a viscosity decreasing additive in aqueous softening agents useful for textile finishing or dyeing.
  • A quaternary ammonium compound made from DMAPA is useful as a non-yellowing fabric softener which can be used in the rinse cycle, in combination with detergent formulations in the wash cycle, or as a liquid concentrate to be applied to fabrics.  A fluorescent whitener for acrylic fibers was prepared from 4,5-dichloronaphthalic anhydride, DMAPA, and 2-ethoxyethanol. Reaction products of DMAPA and C11-14 epoxyalkanes were used to prepare detergent compositions suitable for laundering textiles in cold water.
  • Finishing poly(ethylene terephthalate) fibers with a composition containing DMAPA and a siloxane followed  by heat treatment gave staple fibers with increased resilience.
    Quaternary salts prepared from polymethacrylate, DMAPA, and allyl chlorides imparted good antistatic properties to nylon, polyester, and other synthetic fabrics.
  • DMAPA has been added to polymeric systems to alter the dye-reception properties thereof.Basic phthalocyanine dyes have been prepared from DMAPA.  Such dyes are reported to be useful for dyeing plastics, synthetic varnishes, and fibers of cellulose, nylon, and polyacrylonitrile. They are also used in printing inks.
  • Dimethylaminopropylamine has been used effectively for curing epoxy resins.
  • Derivatives of dimethylaminopropylamine have been examined in pharmaceutical applications.  Diquaternary salts of DMAPA derivatives have been suggested for  regulating  blood  pressure. Sulfonamides possessing antiseptic properties have been prepared from DMAPA and aryl sulfonyl chlorides.  The condensation product of DMAPA with a substituted thiadiazole yielded a drug which showed antimalarial activity.
  • The reaction product of DMAPA and α,α’- dichloro-p-xylene was effective in preventing the ozone deterioration of rubber.
  • An ion exchange resin with high exchange capacity was prepared by treating a cross-linked alkyl acrylate polymer with DMAPA.
  • A cationic sizing agent for paper was prepared by reacting maleic anhydride-α-olefin copolymers with DMAPA.
  • Water-soluble polyelectrolytes useful as flocculants in papermaking are prepared from DMAPA and polyvinyl chloride, a styrene-vinyl chloride copolymer, and C20-30 chlorinated paraffins, and from DMAPA, water, and acrylonitrile.
  • A product useful in flocculating and settling an aqueous suspension of Georgia kaolin clay is prepared from a styrene- maleic anhydride copolymer.
  • DMAPA, and methyl chloride. One suitable as a precipitant for waste treatment was prepared from DMAPA and an alkenyl- or alkylsuccinic anhydride.
  • Polystyrene is stabilized to outdoor weathering by the incorporation of DMAPA.