108 results about "Dianhydrohexitol" patented technology

A two component laminating adhesive is provided, wherein one component contains at least one isocyanate-functionalized compound and the other component contains one or more 1,4:3,6 dianhydrohexitols. A laminate may be formed by combining the two components to provide an adhesive and then using the adhesive to adhere one polymeric film or metallic foil to another polymeric film or metallic foil. The adhesive layer between the film and/or foil layers of the laminate is then cured. The adhesives exhibit faster green strength development and higher final bond strength as compared to conventional two component laminating adhesives not containing any 1,4:3,6 dianhydrohexitol as a coreactant.

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.

Diesel cycle fuel compositions are described containing at least one dianhydrohexitol compound according to the general formula 2 and/or its

derived hydrocarbyl ethers or nitric ethers compounds, where the R′ and R″ substituents are both H or one or both of R′ and R″ is alkyl, cycloalkyl or phenyl, or one or both are —NO₂. A preferred fuel composition is that containing dimethyl isosorbide (DMI) added or not of isosorbide dinitrate (ISDN) as ignition improver. The dianhydrohexitols compounds form compositions with at least one of the components selected among petroleum-derived diesel fuel, biodiesel, ethanol and water. The mixture of DMI and ISDN has excellent cetane number (IQT). Still, the oxygenated nature of the dianhydrohexitols and related compounds of the fuel compositions inhibits soot formation upon burning of the said Diesel cycle fuel compositions.

The invention relates to a thermoplastic polymer comprising at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A) and at least one high-viscosity terephthalic acid unit (C).

A polymer resin composition capable of providing a synthetic resin showing physical properties of improved heat resistance or impact resistance is provided, in which the polymer resin composition includes a polyester tetrapolymer containing a residue of a dicarboxylic acid component containing terephthalic acid and a residue of a diol component containing dianhydrohexitol, and one or more terpolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft terpolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft terpolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft terpolymer.

Disclosed herein 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 relates to a polymer resin composition that is capable of providing an environmentally friendly biomass-containing synthetic resin having improved chemical resistance. The present invention provides a polymer resin composition including: a polyester copolymer including a residue of a dicarboxylic acid component containing terephthalic acid, and a residue of a diol component including dianhydrohexitol; and one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft copolymer, and which has a tensile strength loss defined in the following Equation 1 ranging from 0.5 to 30%.

Tensile Strength Loss (%)=[(Tensile Strength before Test−Tensile Strength after Test)/Tensile Strength before Test]×100  [Equation 1]

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. Another method produces dianhydrogalactitol from dulcitol; this method comprises: (1) reacting dulcitol with a reactant to convert the 1,6-hydroxy groups of dulcitol to an effective leaving group to generate an intermediate; and (2) reacting the intermediate with an inorganic weak base to produce dianhydrogalactitol through an intramolecular S_N2 reaction. Other methods for the synthesis of dianhydrogalactitol from dulcitol are described.

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 2 and an average hydroxyl equivalent weight of from about 400 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 4000 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, and the curing agent is either dianhydrohexitol, an aromatic diamine, or a cyclohexanedimethanol.

The invention concerns a method for producing a polyester containing at least one 1,4:3,6-dianhydrohexitol unit comprising:·a step of introducing, into a reactor, monomers comprising at least one monomer (A) that is a diacid or a diester and at least one monomer (B) that is a 1,4:3,6-dianhydrohexitol;·a step of introducing, into the reactor, a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts;·a step of polymerising said monomers to form the polyester;·a step of recovering a polyester composition comprising the polyester and the catalytic system. The invention also concerns a polyester composition containing a catalytic system comprising either a catalyst comprising the element germanium and a catalyst comprising the element aluminum, or a catalyst comprising the elements germanium and aluminum, or a mixture of said two catalysts, and the use of same to reduce the colouring of the polyester.

A thermoplastic polyester having: at least one 1,4:3,6-dianhydrohexitol unit; at least one alicyclic diol unit other than 1,4:3,6-dianhydrohexitol units; at least one carboxylic diacid unit selected from among furan-2,5-dicarboxylic acid, 2,6-naphthalic acid and isophthalic acid units, said polyester including at least 10% 1,4:3,6-dianhydrohexitol units and being free from ethylene glycol and terephthalic acid units. The invention also relates to the production method and use of same.

The invention provides a biobased dianhydride monomer adopting a structure shown as formulae I-IV. The invention further provides biobased polyimide resin adopting a structure shown as formula 1, wherein n is 1-10000 and R1 is one or more of structures shown as formulae 2-7. The biobased dianhydride monomer provided by the invention, namely a 1,4:3,6-dianhydrohexitol-dianhydride monomer, has certain rigidity, and when the biobased dianhydride monomer is applied to synthesis of the polyimide resin, the obtained polyimide resin adopting a novel structure has the advantages of good heat resistance and toughness and the like. Moreover, the polyimide resin is white, and a film is light yellow and transparent and has certain optical activity. A polyimide material prepared by the preparation method provided by the invention can meet requirements in certain fields such as the field of electronic components, and can also be applied to the field of the conventional plastic, films and fiber and the like.

The present invention relates to the use of a packaging material based on a thermoplastic polymer for packaging a dianhydrohexitol, the packaging material comprising at least one thermoplastic polymer layer containing at least 0.1% by weight of at least one antioxidant (layer (A)), said layer (A) either being directly in contact with the dianhydrohexitol or being separated from the latter by a thermoplastic polymer layer (layer (B)) having a thickness at most equal to 150 [mu]m, and the thermoplastic polymer of the layer (A) and/or of the layer (B) being chosen independently from polyethylene, polypropylene, ethylene/polypropylene copolymers and blends of the latter.

A process for manufacturing a polycarbonate, having a glass transition temperature greater than or equal to 50° C., includes: ▪ a step (1) of introducing into a reactor a monomer of formula (I) and R1 and R2 being identical or different alkyl groups; ▪ a step (2) of introducing into the reactor at least one cyclic diol or a mixture of diols (B) including at least 20 mol % of cyclic diols; ▪ a subsequent step (3) of polycondensation via transesterification of the mixture of monomers including the monomers (A) and (B); ▪ a step (4) of recovering the polycarbonate formed during step (3).

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 relates to a method for producing vinyl ester urethane resins, in which a dianhydrohexitol-compound is reacted with a diisocyanate in the presence of a monomeric radically co-polymerizable compound as a solvent and the product is reacted with a hydroxy-substituted (meth)acrylate. As a result, vinyl ester urethane resins based on dianhydrohexitol-compounds and also based on renewable raw materials can be obtained in a simple manner with high yields. Said resins are suitable as binding agents in chemical fixing engineering.

The present invention relates to parts for automobiles, electrical/electronic devices, home appliances, office equipment, or daily necessities, which are manufactured by using a polymer resin composition that is capable of providing an environmentally friendly biomass-containing synthetic resin having improved chemical resistance. The parts for automobiles, electrical/electronic devices, home appliances, office equipment, or daily necessities which are manufactured by using a polymer resin composition including: a polyester copolymer including a residue of a dicarboxylic acid component containing terephthalic acid, and a residue of a diol component containing dianhydrohexitol; and one or more copolymers selected from the group consisting of an unsaturated nitrile-diene-based rubber-aromatic vinyl graft copolymer, an alkyl methacrylate-diene-based rubber-aromatic vinyl graft copolymer, and an alkyl methacrylate-silicone/alkyl acrylate graft copolymer, and which has a tensile strength loss defined in the following Equation 1 ranging from 0.5 to 30%, can be provided.

Tensile Strength Loss (%)=[(Tensile Strength before Test−Tensile Strength after Test)/Tensile Strength before Test]×100  [Equation 1]

A thermoplastic polyester including: at least one 1,4:3,6-dianhydrohexitol unit (A); at least one cyclic diol unit (B) other than cyclohexanedimethanol units and 1,4:3,6-dianhydrohexitol units (A); and at least one aromatic carboxylic diacid unit (C), the polyester being free from ethylene glycol units. It also relates to the production method and use of same.

Packaging method comprising the following steps: (a) providing a semi-crystalline thermoplastic polyester having at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A), and at least one terephthalic acid unit (C), wherein the molar ratio (A)/[(A)+(B)] is at least 0.05 and at most 0.30, said polyester being free of non-cyclic aliphatic diol units or comprising a molar amount of non-cyclic aliphatic diol units, relative to the totality of monomeric units in the polyester, of less than 5%, and with a reduced viscosity in solution (25° C.; phenol (50 wt. %): ortho-dichlorobenzene (50 wt. %); 5 g/L of polyester) greater than 50 mL/g; (b) preparing a heat-shrinkable film from the semi-crystalline thermoplastic polyester obtained in step (a); (c) covering a product with the heat-shrinkable film obtained in step (b); (d) applying a heat treatment to the packaged product.