摘要:
Compounds of the naphthalimide series which in the dissolved condition exhibit a characteristic blue, violet or bluish violet fluorescence, and a process for their production. The compounds are outstandingly suitable for the optical brightening of synthetic fibers.
摘要:
Foam is controlled in the sugar industry and yeast industry by a process in which oxyalkylation products of the formula IR--O--(X.sub.1).sub.n --(X.sub.2).sub.m --(X.sub.3).sub.p --Zwhere R is alkyl of 6 to 22 carbon atoms or alkylphenyl where alkyl is of 6 to 12 carbon atoms, X.sub.1 and X.sub.3 are ethylene oxide units, n and p are each from 0 to 15 and the sum of n and p is not less than 2, the groups X.sub.2 are propylene oxide and/or butylene oxide units, m is from 0 to 15 and Z is straight-chain or branched alkyl of 1 to 4 carbon atoms, allyl or benzyl, having a turbidity point of
摘要:
A process for the preparation of water-emulsifiable polyethylene by oxidizing high density polyethylene, at below the softening point of the polyethylene, in the presence of oxygen, wherein the oxidation is carried out in a fluidized bed reactor, using a polyethylene which beforehand has been heated, with exclusion of oxygen, in the presence of a compound which forms free radicals.
摘要:
Products which have been obtained by reacting an acid of the formula I ##STR1## where R.sup.1 and R.sup.2 are hydrogen, fluorine, chlorine, bromine or alkyl or alkoxy of 1 to 4 carbon atoms, but the sum of the carbon atoms of R.sup.1 and R.sup.2 is not greater than 7 and preferably not greater than 3, A is a benzene, naphthalene or anthracene radical or a biphenyl structure, such as a diphenyl, diphenylmethane, diphenyl ether, diphenyl sulfide, diphenyl sulfoxide or diphenyl sulfone radical, R.sup.3 is hydrogen, alkyl of not more than 4 carbon atoms, .beta.-cyanoethyl or hydroxyalkyl of 2 to 4 carbon atoms, R.sup.4 is hydrogen, fluorine, chlorine, bromine, alkyl or alkoxy of 1 to 4 carbon atoms, hydroxyl or carboxyl and X is --SO.sub.2 -- or --CO--, with an amine of the formula II ##STR2## where R.sup.5 and R.sup.6 are hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.2 -C.sub.4 -hydroxyalkyl and/or ##STR3## R.sup.7 and R.sup.8 being hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.2 -C.sub.4 -hydroxyalkyl and n being an integer from 2 to 4, in the ratio, expressed in terms of equivalents, of from 1:1 to 1:4, and corrosion inhibitors which contain these products, with or without the admixture of an alkanolamine/boric acid reaction product.
摘要:
Compounds of the formula: ##STR1## in which one R is identical with or different from the other R and each is alkyl, hydroxyalkyl, alkoxyalkyl, haloalkyl, cycloalkyl, aralkyl, aryl, N,N-dialkylaminoalkyl or quaternized N,N-dialkylaminoalkyl; A is ##STR2## or ##STR3## R.sup.1 is hydrogen, substituted or unsubstituted alkyl, cycloalkyl, aralkyl, aryl or heteroaryl;B is --CH.dbd.CH--, --CCl.dbd.CH--, --CCl.dbd.CCl--, --CH.dbd.CBr--, --CH.sub.2 --CH.sub.2 --,1,2-phenylene, 1,8-naphthylene or 1,2-phenylene or 1,8-naphthylene bearing chloro, bromo, methoxy or ethoxy as a substituent; and T is acyl.The compounds are eminently suitable as optical brighteners, particularly for polyesters and blends of polyester and cotton.
摘要:
Oxidized polyethylenes useful as water-emulsifiable waxes and as lubricants in the extrusion of polyvinyl chloride are prepared by oxidizing finely divided polyethylene of high density at elevated temperatures with an oxidation gas of air and/or oxygen, the oxidation gas supplied per hour containing not less the 100 mg of ozone per kilogram of polyethylene, by performing the oxidiation in a paddle dryer and passing the oxidation gas into the free gas space above the polyethylene, the temperature in the paddly dryer preferably being continuously adjusted to from 1.degree. to 2.degree. C. below the softening point of the polyethylene.
摘要:
A lubricant for shaping polyvinyl chloride, which contains esters of oligomers of trihydric, tetrahydric, pentahydric or hexahydric aliphatic alcohols, having 3 or more monomer units, with saturated or unsaturated C.sub.8 -C.sub.36 -fatty acids, from 30 to 100% of the alcoholic hydroxyl groups being esterified.
摘要:
A lubricant for molding chlorine-containing thermoplastics, which contains ethylene/acrylic acid or ethylene/maleic acid copolymers esterified, in a molar ratio of carboxyl groups to alcoholic hydroxyl groups of from 1:0.2 to 1:1, with C.sub.1 -C.sub.20 -aliphatic alcohols which may or may not contain ether groups, the copolymers, prior to esterification, having a mean molecular weight of from 500 to 10,000 and containing from 2 to 15% by weight of acrylic acid or from 1 to 8% by weight of maleic acid as copolymerized units, the percentages being based on copolymer.
摘要:
An acidic nickel electroplating bath containing brighteners and levelling agents, wherein the levelling agents are compounds of the formula I ##STR1## where N is a hetero-aromatic nitrogen base, R, R.sup.1 and R.sup.2 are hydrogen or alkyl, R.sup.3 is arylene, X is SO.sub.3.sup.-, Y is a neutralizing cation, n is from 1 to 3 and m is from 1 to 2.5.
摘要:
Pyrazoline compounds of the formula (I): ##STR1## in which EACH OFB.sup.1 to B.sup.5 is hydrogen or C.sub.1 to C.sub.4 alkyl;R.sup.1 is hydrogen, alkyl or hydroxy;R.sup.2, r.sup.3, r.sup.5, r.sup.6 and R.sup.7 independently of one another are hydrogen, chloro, bromo, fluoro, methyl, ethyl, methoxy or ethoxy;R.sup.4 is hydrogen, alkyl, benzyl, phenylethyl or also phenyl optionally bearing chloro, bromo, methyl, ethyl, methoxy, ethoxy, cyano, dialkylamino or SO.sub.3 H as a substituent;X is --O--, --S--, --NR.sup.8 --, --NR.sup.8 CO--, --NR.sup.8 --SO.sub.2 --, --OSO.sub.3 -- or --SO.sub.3 --;R.sup.8 is hydrogen, alkyl or alkyl bearing hydroxy or C.sub.1 to C.sub.4 alkoxy as a substituent;A is hydrogen, sodium, potassium, unsubstituted or substituted ammonium, unsubstituted or substituted alkyl, cycloalkyl, aralkyl or aryl; and--NR.sup.8 -- and A together may be an optionally quaternized saturated or unsaturated heterocyclic ring.The compounds are eminently suitable as optical brighteners for example for acrylonitrile polymers, wool and polyamides.