Abstract:
A method for producing ε-caprolactam and a method for reactivating a zeolite catalyst for the production are provided. In the reactivation step, a zeolite catalyst is allowed to contact a gas containing a carboxylic acid, water and a compound selected from ammonia and amines. In accordance with the present invention, the catalytic activities of a zeolite catalyst used for the Beckmann rearrangement reaction of cyclohexanone oxime can be effectively restored. Consequently, ε-caprolactam may be produced with a high production yield for a long period of time by reusing the catalyst by the method described above.
Abstract:
Disclosed are catalysts for the polymerization of higher lactam monomers. The catalysts comprise an essentially homogenic binary mixture of lauric-lactam and a salt of lauric-lactam.The inventive catalyst can be stored at room temperature without making special provisions to avoid any access of air and moisture.
Abstract:
An improved process for the preparation of a lactam-magnesium compound which involves bringing into intimate admixture a lactam monomer represented by the following structural formula: ##STR1## wherein Y is an alkylene group having from 3 to 12 carbon atoms, in particulate form, and an organomagnesium-containing material. The process is carried out at a temperature below the melting point of the lactam monomer but at a temperature sufficient to convert at least a portion of the lactam monomer to said lactam-magnesium compound in pulverulent form. The lactam-magnesium compound is useful as a catalyst for anionic lactam polymerization.
Abstract:
Powder coatings for the preparation of protective films for a wide variety of substrates, said coatings being based on urethane or epoxy systems containing a .epsilon.-caprolactam-blocked mixed 5(6)-isocyanato-1-(4'-isocyanatophenyl)-1,3,3-trimethylindane; as well as the mixed diisocyanate and the .epsilon.-caprolactam-blocked form thereof.
Abstract:
Substantially pure crystals of .epsilon.-caprolactam-diblocked .omega.,.omega.'-diisocyanato-1,3-dimethylbenzene melting at 110.degree. C. or higher are advantageously used as a hardener of powder coating composition.
Abstract:
Reaction products of .epsilon.-caprolactam with vicinal hydroxyalkylamines and possible adducts thereof with epoxyalkanes having the overall formula: ##STR1## wherein R.sub.1 and R.sub.2 are members selected from the group consisting of hydrogen and alkyl having 1 to 16 carbon atoms with the proviso that the sum of the carbon atoms in R.sub.1 and R.sub.2 is from 6 to 30 when R.sub.1 and R.sub.2 are alkyl and from 6 to 16 when R.sub.1 or R.sub.2 is hydrogen, R.sub.3 is a member selected from the group consisting of hydrogen, alkyl having 1 to 5 carbon atoms and ##STR2## where m is an integer from 2 to 10, and R.sub.4 and R.sub.5 are members selected from the group consisting of hydrogen and alkyl having 1 to 3 carbon atoms, EPA is an epoxide selected from the group consisting of ethylene oxide, propylene oxide and glycide, x is a number representing mols of from 1 to 5 and y is a number representing mols of from 0 to 5; and the organic and inorganic acid salts thereof; the reaction products are useful as antimicrobials in the treatment of aqueous media and in detergents together with other surface-active compounds.
Abstract:
A complex of a polylactam and a phenolic compound having the formula: ##SPC1##Wherein m is an integer from 2 to 5; z and y are expressed as a ratio of z:y and is 1:1, 1:2, 2:3 or 1:4; W is alkylene having from 3 to 20 carbon atoms and each R and R.sub.2 is hydrogen, halogen, hydroxyl, alkoxy of 1 to 4 carbon atoms, amido, alkyl hydroxy of from 1 to 4 carbon atoms, cyano or alkyl having from 1 to 12 carbon atoms, and wherein R.sub.2 can also be alaninyl, or ##SPC2##Where each R' is hydrogen, hydroxyl, halo, cyano, alkyl having from 1 to 6 carbon atoms or nitro. The complexes are useful as germicides, insecticides, wood preservatives, plasticizers, and anti-oxidants.