Patents Assigned to Synthesis (U.S.A.)
  • Polysiloxanic stabilizers containing sterically hindered phenol groups and oxamidic groups
    Patent number: 5302735
    Abstract: Polysiloxanic compounds, containing sterically hindered phenol groups and oxamidic groups in the molecule, obtained by the copolymerization of monomers having general formula (I):(R.sup.1).sub.n (R.sup.2).sub.3-n Si--R.sup.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: April 12, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Daniele Fabbri, Luciano Pallini
  • Fast-crystallizing polyester compositions
    Patent number: 5296521
    Abstract: The present invention relates to fast-crystallizing polyester compositions comprising: (a) a thermoplastic polyester resin; (b) a nucleating agent of the formula: ##STR1## wherein: R is an alkali or alkaline-earth metal; m is 1, 2 or 3; n takes an average value within the range of 1 to 5; said nucleating agent being optionally admixed with the compound of formula (I) wherein R is a hydrogen atom, linear alkyl radial or branched alkyl radical each having from 1 to 6 carbon atoms; with the proviso that at least 50% mole of said nucleating agent is in the salt form. This nucleating additive raises the crystallization temperature upon cooling (T.sub.cc) of the polyester so that crystallization occurs rapidly during molding.
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: March 22, 1994
    Assignees: Istituto Guido Donegani S.P.A., Enichem Synthesis S.P.A.
    Inventors: John W. Gilmer, Gianluigi Landoni
  • Polysiloxanic stabilizers containing sterically hindered phenol group and reactive groups
    Patent number: 5292850
    Abstract: Polymeric stabilizers with a polysiloxanic structure contain sterically hindered phenol groups and reactive groups capable of binding themselves to the polymeric structure to be stabilized. These polymeric stabilizers are particularly suitable for applications which require the non-extractability of additives due to solvents, fats or soaps.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 8, 1994
    Assignee: Enichem Synthesis
    Inventors: Luciano Pallini, Daniele Fabbri, Rossella Farris, Carlo Neri
  • Method for production of a coated substrate with controlled surface characteristics
    Patent number: 5290533
    Abstract: A crystalline, porous, synthetic material is disclosed, together with its related preparation process.Such a material of zeolitic character, containing silicon, titanium and iron oxides, corresponds, in its calcined and anhydrous state, to the following empi rical formulapHFeO.sub.2.qTiO.sub.2.SiO.sub.2wherein p has a value greater than zero and lower than or equal to 0.050, q has a value greater than zero and lower than or equal to 0.025, and the H.sup.+ of HFeO.sub.2 can be at least partly replaceable or replaced by cations.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: March 1, 1994
    Assignees: Eniricerche S.p.A., Enichem Synthesis S.p.A., Snamprogetti S.p.A.
    Inventors: Giuseppe Bellussi, Mario G. Clerici, Aldo Giusti, Franco Buonomo
  • Diol-terminated polycarbonates
    Patent number: 5288839
    Abstract: Diol-polycarbonates having the general formulaHO--(Ri--O--CO--O).sub.x ----(R.sub.2 --O--CO--O--).sub.y --R.sub.3 --OH (I)where R.sub.1, R.sub.2, R.sub.3, X and Y have the meaning specified in the text, are used in the synthesis of prepolymers which in turn can be used in reactive adhesive and/or sealing formulations of the hygro-, photo- or thermosetting type, and the procedure for their preparation. The sealing compositions deriving from these diolterminated-polycarbonates are mainly used in transport industry, in the textile and wood industry, for cellular products and in the bookbinding industry.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: February 22, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventor: Alberto Greco
  • Pentaerythryl phosphonates and their use in self-extinguishing thermoplastic polymeric compositions
    Patent number: 5288869
    Abstract: 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).
    Type: Grant
    Filed: August 6, 1992
    Date of Patent: February 22, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventors: William Giroldini, Gianluigi Landoni, Antonio Rinaldi, Carlo Neri
  • Organic glass with improved impact strength and with a refractive index equal or similar to that of mineral glass
    Patent number: 5286816
    Abstract: An organic glass with improved impact strength and with a refractive index equal or similar to that of mineral glass (crown glass), is composed of the product of the radicalic polymerization of the polymerizable liquid composition obtained by the transesterification of:(A) diallyl carbonate with a mixture of polyols:(B) bis(2-hydroxyethylether) of bisphenol-A,(C) diethylene glycol, and(D) tris(hydroxyethyl) isocyanurate,where for every 100 parts b.w. of the sum of polyols (B), (C) and (D), polyol (B) is present in a quantity of from 20 to 60% b.w., polyol (C) is present in a quantity of from 20 to 60% b.w. and polyol (D) is present in a quantity of from 10 to 40% b.w.; and where the molar ratio between the diallyl carbonate and the sum of polyols (A)/(B)+(C)+(D) is equal to or higher than 3/1.
    Type: Grant
    Filed: April 20, 1993
    Date of Patent: February 15, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Franco Rivetti, Fiorenzo Renzi, Claudio Gagliardi
  • Composition for the production of artificial marble or granite
    Patent number: 5280051
    Abstract: Artificial marble or granite having excellent aesthetic properties, patterns and tonalities which cannot be found in natural materials are prepared from a composition containing a polymerizable poly(allyl carbonate) of a polyol and mineral filler, where the mineral filler is a carbonate type in the case of marble, and silicate or silica type in the case of granite, and is in the form of particles of which at least 40% to 100% by weight have a particle size greater than 0.5 mm. The artificial marble and granite produced by the process of the invention require a limited quantity of polymerizable poly(allyl carbonate) binder, have excellent aesthetic properties and high aging resistance, making them suitable for external use.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: January 18, 1994
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Enrico Traverso, Fiorenzo Renzi
  • Stabilizers for compositions for acid gas absorbent
    Patent number: 5273679
    Abstract: A composition for acid gas absorbent comprising:(A): 99.99 to 70 wt % of a polyethylene glycol dimethyl ether composition represented by the following formula:CH.sub.3 O(C.sub.2 H.sub.4 O).sub.n CH.sub.3wherein n is an integer of 1 to 10; and,(B): 0.01 to 30 wt % of a compound containing at least one of an --NH-- group, a phenolic --OH group and an --S-- group in one molecule thereof but free from an alcoholic --OH group, is provided. More particularly, component B may be an amine, preferably a secondary amine, or a phenolic compound.
    Type: Grant
    Filed: April 12, 1991
    Date of Patent: December 28, 1993
    Assignees: Toho Kagaku Kogyo Co., Ltd., State Scientific-Research and Designing Institute for Nitrogen Industry and for Products of Organic Synthesis
    Inventors: Takeshi Hihara, Norio Tagata, Toshimitsu Shimizu, Tetsu Matsuda, Norio Takahashi, Isamu Ueno, Josif L. Leites, Julia G. Carpova, Tatiana V. Zhitkova
  • Oxamidic stabilizers
    Patent number: 5264604
    Abstract: Oxamidic stabilizers containing organofunctional groups of silicon, capable of producing polymeric structures or of chemically binding themselves to a solid support.
    Type: Grant
    Filed: January 13, 1993
    Date of Patent: November 23, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Luciano Pallini, Daniele Fabbri
  • Stabilizing mixture for compounds having a photochromatic activity
    Patent number: 5242624
    Abstract: Stabilizing mixture for photochromatic substances containing a cyclic amine chosen from 1,4-diazabicyclo-(2.2.2)octane and quinuclidine, or their derivatives, and at least one sterically hindered amine.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: September 7, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Vincenzo Malatesta, Pietro Allegrini, Luciana Crisci
  • Process for the preparation of 4,4'-diaminodiphenyl-methane and its derivatives
    Patent number: 5241119
    Abstract: Process for the preparation of 4,4'-diaminodiphenylmethane and its derivatives.4,4'-diaminodiphenylmethane and its derivatives are prepared by the condensation of aniline, or its derivative, and aldehyde, or its precursor and/or isomerization of appropriate intermediate products. The reaction proceeds with zeolites acting as catalysts; these catalysts, which are selected in accordance with the reaction to be effected, are preferably zeolites based on Si, Al and B; Si, Al and Ti; Ti and Fe; ZSM-5; or Y zeolites.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: August 31, 1993
    Assignees: Eniricerche S.p.A., Enichem Synthesis S.p.A.
    Inventors: Mario G. Clerici, Giuseppe Bellussi, Ugo Romano
  • Process for obtaining granular forms of additives for organic polymers
    Patent number: 5240642
    Abstract: Process for obtaining granular forms of organic and inorganic antiacid additives and tetrakis-[3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionyloxymethyl]-metha ne, carried out in the presence of an amount of the latter in the molten state, homogeneously distributed throughout the powder mass.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: August 31, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Luciano Pallini
  • Method of crosslinking moisture curable systems with oxazolidinic silane and siloxanes
    Patent number: 5234995
    Abstract: New silanes containing at least two oxazolidinic moieties can be defined by means of the general formula: ##STR1## wherein X.sub.1, X.sub.2, X.sub.3 and X.sub.4 have the meaning as reported in the specification, and each one of A.sub.1, A.sub.2 and A.sub.3 represents from 0 to a plurality of siloxane radicals--SiO--and are better defined in the text of the specification.These compounds are useful as crosslinking agents for moisture-hardening systems based on polyisocyanates, of acrylate polymers and of polyepoxides in compositions for coatings, sealants and adhesive agents.
    Type: Grant
    Filed: October 31, 1991
    Date of Patent: August 10, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventor: Alberto Greco
  • Procedure for the preparation of bisoxazolidines containing urethanic groups
    Patent number: 5235062
    Abstract: New procedure for the preparation of polyoxazolidines which can be defined with the general formula: ##STR1## This procedure, which excludes the use of isocyanates, requires the simple transesterification of the dicarbamate of a diamine with an N-hydroxyalkyloxazolidine.
    Type: Grant
    Filed: April 9, 1992
    Date of Patent: August 10, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Alberto Greco, Franco Mizia, Franco Rivetti
  • Stabilizing compositions for organic polymers
    Patent number: 5229442
    Abstract: Stabilizing compositions for organic polymers, composed of mixtures of at least one liquid phenolic antioxidant and at least one aminic antioxidant, subjected to thermal treatment, are characterized by their stabilizing capacity which is considerably higher than that of either single components or of corresponding untreated mixtures.These stabilizing compositions can be used in all field where the single components of the mixtures are generally used and, preferably, in the stabilization of organic polymers normally subject to deterioration due to oxidation processes.
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: July 20, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Fabio Broussard, Carlo Busetto
  • Photochromatic compound, a method for its preparation, and articles which contain it
    Patent number: 5225563
    Abstract: 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;R.sub.3 is a variously substituted mono or polycondensed heterocyclic or aryl radical.A compound (I) demonstrates marked photochromatic characteristics both when in an organic solvent solution and when incorporated into polymer matrices.
    Type: Grant
    Filed: December 18, 1990
    Date of Patent: July 6, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, William Giroldini, Antonio Rinaldi, Luciana Crisci
  • Photochromatic composition endowed with light fatigue resistance and photochromatic articles which contain it
    Patent number: 5225113
    Abstract: A photochromatic composition, endowed with a high light fatigue resistance contains a photochromatic compound belonging to the class of spirooxazines and an U.V.-stabilizer consisting of a sterically hindered amine to be defined by means of formula (I): ##STR1## wherein: R is either hydrogen or a methyl group,x is either oxygen or nitrogen,m is a number comprised within the range of from 2 to 10, andn is a number coprised within the range of from 1 to 100.A photochromatic article made from a thermoplastic material, endowed with a high light fatigue resistance, contains a thermoplastic material and the hereinabove disclosed photochromatic composition.
    Type: Grant
    Filed: March 19, 1992
    Date of Patent: July 6, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Busetto, Luciana Crisci
  • Polyoxazolidines with a structure containing carbonate groups, procedure for their preparation and use
    Patent number: 5219979
    Abstract: New polyoxazolidines can be defined with the general formula: ##STR1## where R, R.sub.1, R.sub.2 and n have the meaning specified in the description. These polyoxazolidines are useful cross-linking agents for hydrocuring systems based on polyisocyanates, acrylate polymers and polyepoxides, in compositions for paints, coatings, sealants and adhesives.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: June 15, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventor: Alberto Greco
  • Procedure for the preparation of nitroxyl radicals of sterically hindered amines
    Patent number: 5218116
    Abstract: Procedure for the preparation of nitroxyl radicals of sterically hindered amines, consisting of the reaction of amines with hydrogen peroxide in the presence of a titanium containing catalyst, particularly in the presence of titanium silicalites.The catalyst can be recovered at the end of the reaction and recycled.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: June 8, 1993
    Assignee: Enichem Synthesis S.p.A.
    Inventors: Carlo Neri, Silvestro Costanzi, Rosa M. Riva, Mariangela Angaroni