109 results about "Dianhydrohexitol" patented technology

The invention relates to a surface treatment method, in which a material other than the human body, which is selected from metallic materials and fibrous materials, is brought into contact with a composition comprising at least one dianhydrohexitol ether (compound A). The dianhydrohexitol ether can be associated with a compound B which is selected from among solubilising agents, acid agents and alkaline agents. The fibrous material to undergo surface treatment is chosen from the following materials in particular, namely: wood materials, vegetable materials, paper materials and textile materials.

The present invention relates to: a bio-based polycarbonate ester comprising: (i) repeat unit 1 obtained from a condensation reaction of 1,4:3,6-dianhydrohexitol and carbonate; and (ii) repeat unit 2 obtained from a condensation reaction of 1,4:3,6-dianhydrohexitol and 1,4-cyclohexanedicarboxylate; and a preparation method for the bio-based polycarbonate ester, comprising the steps of: (1) preparing a compound represented by formula 3 through a trans-esterification or esterification reaction of a compound represented by formula 2 and phenol; and (2) preparing a compound comprising a repeat unit represented by formula 1 through a polycarbonate melt polycondensation reaction of the compound represented by formula 3 prepared in step (1), a compound represented by formula 4, and 1,4:3,6-dianhydrohexitol. The bio-based polycarbonate ester, according to the present invention, is capable of controlling advantages and disadvantages of physical properties obtained from each repeat unit, and has high thermal resistance and high transparency, and thus is capable of being effectively used for various uses.

The invention concerns a method for preparing a dianhydrohexitol diester composition, characterized in that it comprises a step which consists in esterifying a dianhydrohexitol composition with a carboxylic acid in the presence of an acid catalyst and hypophosphorous acid. Preferably, the hypophosphorous acid is introduced in an amount ranging between 0.05 and 2 wt. % of dianhydrohexitol, and in a hypophosphorous acid / acid catalyst weight ratio less than 1 / 1. Said method enables novel dianhydrohexitol diester compositions, for example isosorbide diesters, isomannide and / or isoidide richer in diester(s) and / or less coloured, useful in numerous industrial applications, in particular in plastic compositions, to be obtained.

Disclosed is a toner for use in an electronic photograph-duplicating process or in an electrostatic printing process, and a polyester resin included in the toner as a binder. The polyester resin comprises lactic acids (D or L-lactic acids) or lactides (D or L-lactides) which are derivative compounds thereof, and dianhydrohexitols which are bio-derived sugar derivatives.

The present invention teaches a new process to produce novel, hard, optically clear, impact-resistant polyurethane polymers that are characterized by excellent thermo mechanical properties and chemical resistance, and the polymers made as a result of such a process. The polyurethanes are made by reacting a) a prepolymer made by reacting a polyisocyanate with a primary amine-terminated polyether with an amine functionality of about 2 and a molecular weight of >1000, and in which the free —NCO content of the resulting prepolymer is >18% by weight; with b) (i) a polyol having an average hydroxyl functionality greater than or equal to 2 and an average hydroxyl equivalent weight of from about 300 to about 1,000, and (ii) a curing agent that has isocyanate reactive groups, a functionality of 2 to 3 and a molecular weight of <400. More preferably the prepolymer is made by reacting a cycloaliphatic polyisocyanate with a primary amine-terminated polyether diamine of 2000 to about 2500 molecular weight, the polyol is either a polyester polyol triol with a molecular weight of between about 540 and 900, or a polyether glycol with a molecular weight of between about 650 and 2000, or a polyester polyol diol with a molecular weight of up to 2,000, and the curing agent is either dianhydrohexitol, an aromatic diamine, an aromatic ring containing diol or a cyclohexanedimethanol.

A method for preparing a dialkyloxydianhyrohexitol (dimethylisosorbide) composition by etherification of dianhydrohexitol (isosorbide). The aim is to achieve a “clean” method that avoids the use of a methylation agent such as dimethyl sulfate or methyl chloride, which generates stoechiometric quantities of salts, or expensive dialkyl-carbonates, wherein only one of the two methyl groups participates in the preparation of mixed isosorbide ethers. The method involves using at least one O-alkylation agent and a catalyst including an acid or an acid salt, preferably a catalyst having Lewis or BrØnsted acid properties. A device for carrying out the method wherein the device includes a vaporization oven and a reaction oven is also described.

The invention is directed to a polyester comprising 5-furandicarboxylic acid moieties (A); ethylene glycol moieties (B); 1,4:3,6-dianhydrohexitol moieties (C); alicyclic diol moieties other than the 1,4:3,6-dianhydrohexitol moieties (D); wherein the molar ratio (B) / [(B)+(C)+(D)] is greater than 0.2. The invention aloes relates to a process of preparing the polyester and to its use.

The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol.

The present invention relates to a method for preparing dialkyl carbonates of dianhydrohexitol, said method including the following steps: (a) preparing an initial reaction mixture containing at least one dianhydrohexitol, at least two mole equivalents of a dialkyl carbonate of formula and a transesterification catalyst; (b) heating the reaction mixture to a temperature greater than or equal to the boiling temperature of the formed alcohol, or of the azeotrope thereof, in a reaction chamber preferably provided with a rectification column comprising a sufficient number of theoretical distillation plates to separate the resulting alcohol from the reaction mixture. The invention also relates to certain dialkyl carbonates of dianhydrohexitols produced by said method and to the use thereof for synthesising synthetic polymers.

Provided is a polymer resin composition capable of providing an environmentally friendly biomass-containing synthetic resin which exhibits improved chemical resistance. Provided is a high heat resistant polymer resin composition having excellent chemical resistance, the composition including a polyester copolymer containing a residue of a dicarboxylic acid component containing terephthalic acid and a residue of a diol component containing dianhydrohexitol; one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkylmethacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkylmethacrylate-silicone / alkylacrylate graft copolymer; and polytrimethylene terephthalate, and having 0.5 to 20% of percent loss in tensile strength, which is represented by the following Equation 1:Percent loss in tensile strength (%)=[(tensile strength before test−tensile strength after test) / tensile strength before test]×100  [Equation 1]

A polymer composition [composition (C)] comprising: (a) a polyarylene ether ketone (PAEK-1) comprising recurring units deriving from the incorporation of 1,4:3,6-dianhydrohexitols; (b) a poly(biphenylether) sulfone (PPSU-1 ) comprising repeating units of formula (I) and / or (c) a polyetherimide (PEI-1) comprising repeating units of formula (II) wherein Ar* and Ar*' are as defined in the specification are herein disclosed. (PAEK-1) and (PPSU-1) and / or (PEI-1) are completely miscible and give rise to compositions that are transparent and possess high strength and stiffness and that are suitablefor the manufacture of a variety of shaped articles.