Enichem Synthesis S.p.a

Enichimica Secondaria, S.p.a.

Eniricerche S.p.a.

Antonio Rinaldi

Carlo Neri

William Giroldini

Gianluigi Landoni

Enrico Traverso

Villiam Giroldini

Mario Traversoni

Luciana Crisci

Emilio Perrotti

Guido Guizzi

Mario Clerici

Neri Carlo

Poly(Pentaerythrityl diphosphonate) of formula (I): ##STR1## wherein n is an integer having a value comprised within the range of from 3 to 100. The poly(pentaerythrityl diphosphonate) of formula (I) is useful as a flame retardant additive for thermoplastic polymers.

Poly(pentaerythrityl diphosphonate) and its use in self-extinguishing

Compounds which can be defined by the formula (I):

Ski lubricant comprising a hydrocarbon compound containing a perfluoro

A new group of pentaerythryl diphosphonates and poly(pentaerythryl diphosphonates) are described. Flame-retardant compositions are also described, which include a thermoplastic polymer and a certain amount of self-extinguishing agent consisting of one of the above-mentioned pentaerythryl diphosphonates or poly(pentaerythryl diphosphonates).

New pentaerythryl phosphonates containing self-extinguishing

Pentaerythryl phosphonates and their use in self-extinguishing

A photochromatic compound represented by the following general formula (I): ##STR1## where: R.sub.1 and R.sub.2 independently represent a linear, branched or cyclic C1-C10 alkyl radical, H, OH, F, Cl, Br, NH.sub.2, N(R.sub.4).sub.2, COOH, OR.sub.4 or COOR.sub.4 where R.sub.4 is a C1-C10 linear, branched or cyclic alkyl radical, or an aryl radical;

Photochromatic compound, a method for its preparation, and articles

Ski lubricant comprising paraffinic wax and a hydrocarbon compound

A process is provided for preparing a substituted 2,3-dihydrobenzofuran of the general formula ##STR1## in which R.sub.a is hydrogen, halogen, alkyl, straight or branched having from 1 to 4 carbon atoms, aryl, alkaryl, --OH, --OR.sub.3, --N(R.sub.d).sub.2, where R.sub.3 and R.sub.d are alkyl, straight or branched having from 1 to 4 carbon atoms; R.sub.b is alkyl, straight or branched, having from 1 to 6 carbon atoms, aryl, alkaryl; and R.sub.c is hydrogen or the same as R.sub.b, by the rearrangement of a 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane, in the presence of catalytic amounts of a mineral acid or organic acid such as phosphoric, sulfuric or p-toluenesulfonic, at elevated temperatures from 180.degree. to 250.degree. C., and withdrawing the resulting products from the reaction mixture as they are formed. The starting 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane compounds may be obtained by the catalyzed reaction of a substituted biphenol with an aldehyde. The substituted 2,3-dihydrobenzofurans are useful in the manufacture of pesticides.

Process for preparing substituted 2,3-dihydrobenzofuran

Process for the preparation of 2,3-dihydro-2,2-dimethyl-7-benzofuranol, comprising the reaction between catechol or 4-tert.butyl catechol and isobutyraldehyde in the presence of catalytic amounts of at least one compound selected from the group consisting of the oxides, hydroxides, alcoholates and carboxylates of metals belonging to the Groups IA, IIA, IIB and VIIB of the Periodic System of the Elements and the subsequent reaction of rearrangement of the products which have been obtained, optionally previously removing one or more low-boiling components, in the presence of a compound having acidic properties, of an organic or a mineral nature. The product is useful in the synthesis of pesticides.

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San Donato Milanese, Italy

Antonio Rinaldi