34 results about "Fumaric Acid Esters" patented technology

This invention concerns a method for the preparation of polyurea elastomers, comprising: (a) reacting an amine chain extender with dialkyl maleate to form an aspartic ester, wherein the chain extender has a molar amount of amine groups that is less than the moles of dialkyl maleate; (b) blending the aspartic ester with one or more polyoxyalkyleneamines to prepare a resin blend; (c) contacting the resin blend with an isocyanate under conditions effective to form a polyurea elastomer. This invention also concerns a a polyurea elastomer, comprising the reaction product of (a) a resin blend containing one or more polyoxyalkyleneamine and an aspartic ester and (b) an isocyanate, wherein the aspartic ester in the resin blend comprises a reaction product of an amine chain extender and a dialkyl maleate, wherein the mole ratio of amine functionality in the amine chain extender to dialkyl maleate or fumarate is greater than 1:1.

The present invention relates to compositions, kits and methods for administration of a first component of fumaric acid ester(s), or a pharmaceutically acceptable salt thereof, and a second component which is a substance that reduces or eliminates flushing.

The present invention relates to controlled release pharmaceutical compositions comprising fumaric acid ester(s) as active substance(s). The compositions are suitable for use in the treatment of e.g. psoriasis or other hyperproliferative, inflammatory or autoimmune disorders and are designed to release the fumaric acid ester in a controlled manner so that local high concentrations of the active substance within the gastrointestinal tract upon oral administration can be avoided and, thereby, enabling a reduction in gastro-intestinal related side-effects.

A pharmaceutical formulation comprising an erosion matrix comprising one or more fumaric acid esters as well as one or more rate-controlling agents, wherein erosion of said erosion matrix permits controlled release of said fumaric acid ester(s).

A method of making a copolymer composition containing a copolymer, which includes the steps of (a) providing a donor monomer composition that includes an isobutylene type monomer; (b) mixing the donor monomer composition with an ethylenically unsaturated monomer composition that includes one or more ethylenically unsaturated acceptor monomers, and is substantially free of maleate type monomers and fumarate type monomers, and (c) polymerizing the mixture resulting from step (b) in the presence of a free radical polymerization initiator. The polymerization is carried out in the substantial absence of Lewis acids and/or transition metals. The isobutylene type monomer is present at a molar excess of at least 10 mol % based on the molar concentration of monomers in the ethylenically unsaturated monomer composition. The ethylenically unsaturated acceptor monomers are present in an amount of at least 15 mol % of the total monomer composition.

The present invention relates to controlled release pharmaceutical compositions comprising fumaric acid ester(s) as active substance(s). The compositions are suitable for use in the treatment of e.g. psoriasis or other hyperproliferative, inflammatory or autoimmune disorders and are designated to release the fumaric acid ester in a controlled manner so that local high concentrations of the active substance within the gastrointestinal tract upon oral administration can be avoided and, thereby, enabling a reduction in gastro-intestinal related side-effects.

Methods of using one or more fumaric acid esters or pharmacologically active salts, derivatives, analogues, or prodrugs thereof to increase expression of fetal hemoglobin (HbF) are disclosed. The methods typically include administering to a subject an effective amount of one or more fumaric acid esters optionally in combination or alternation with hydroxyurea to induce HbF expression in the subject in an effective amount to reduce one or more symptoms of a sickle cell disorder, a hemoglobinopathy, or a beta-thalassemia, or to compensate for a genetic mutation is the human beta-globin gene (HBB) or an expression control sequence thereof. Pharmaceutical dosage units and dosage regimes for use in the disclosed methods are also provided.

A coating composition is provided. The composition comprises as component I, a) a polyaspartic acid ester comprising the reaction product of one more diamines, one or more difunctional acrylate-containing compounds and one or more maleic/fumaric acid esters; b) at least one moisture scavenger; c) at least one deaerator; d) at least one plasticizer; and e) optionally additives; and as component II, one or more polyisocyanates. Methods of making and applying the composition to a substrate are also provided. The coating is particularly suitable for use as a gel coat.

The present invention provides a process for preventing fumaric acid deposits in the preparation of maleic anhydride, comprising the following steps:

a) absorption of a C₄-dicarboxylic acid or of a derivative from a crude product mixture into an organic solvent or water as an absorbent,

b) removal of the C₄-dicarboxylic acid or of a derivative from the absorbent,

the absorbent thus recovered being catalytically hydrogenated fully or partly and recycled fully or partly into the absorption stage (a).

The invention discloses a method for preparing fumaric acid ester by using plant straws. The method comprises the following sequential steps: 1) leading the plant straws to carry out acid hydrolysis reaction so as to prepare furfural; 2) leading the furfural to carry out oxidation reaction so as to prepare fumaric acid; and 3) leading the fumaric acid and 2-octanol to carry out esterification reaction so as to prepare the fumaric acid ester. The 2-octanol fumaric acid ester prepared by the method not only is the main indispensable raw material for producing novel high-performance synthetic lubricating oil polyester oil, but also has high product purity and high yield; and in addition, the invention also opens up a new material resource and method for producing the 2-octanol fumaric acid ester, and provides a practical way for industrial production of the 2-octanol fumaric acid ester and the plant straws and comprehensive utilization of the plant straws.

The invention provides a poly-butyl glycol fumaric acid ester-based material for an environment-friendly LED packaging adhesive and a preparation method of the poly-butyl glycol fumaric acid ester-based material. A final curing product is a PBF/PPF-DA cross-linking solidified body, namely, a poly-butyl glycol fumaric acid ester/poly-butyl glycol fumaric acid ester diacrylic ester cross-linking solidified body, the solidified product is free of toxicity, the solidification time can be controlled within a relatively short time range by adjusting the lighting intensity and the distance between a light source and a sample, the requirements of LED packaging on the solidification time can be greatly met, and the solidified product is relatively good in light transmittance, refractive index, thermal stability and mechanical property.

Provided are a resin composition characterized by containing 30-99 mass% of a cellulose resin represented by general formula (1) below, and 70-1 mass% of a fumaric acid ester polymer containing 30 mol% or more of fumaric acid residue units represented by general formula (2) below; an optical compensation film employing the same; and a production method for an optical compensation film. (1) (2) (In the formulas, R1-R3 represent C1-12 substituent groups, and R4 and R5 represent C1-12 alkyl groups.)

The invention discloses automobile lubricating oil. The automobile lubricating oil comprises the following raw materials by weight percentage: 2-3% of barium salt of phosphosulfurized polyisobutylene, 0.5-2% of N-phenyl-a-naphthylamine, 0.5-1.5% of tricresyl phosphate, 1.0-20% of polyisobutene, 0.5-3% of zinc naphthenate, 0.1-1.0% of styrene fumaric acid ester copolymer, 1-3% of methylsilicone oil, 1-3% of anitimony diisopropyl dithio phosphate, 1-3% of glyceryl monooleate and the balance of base oil. Compared with the prior art, the automobile lubricating oil has the benefits that the high-temperature cleanliness, the oxidation stability, the antifriction and abrasive resistance, and the base value retainability are excellent, the average oil consumption is low, the engine noise and the engine vibration are reduced, the automobile runs more stably, and the driving control performance is remarkably improved.

There is provided a palm olein composition comprising: (a) palm olein oil (b) (i) a lactic acid ester selected from an ester of lactic acid and a C12 to C22 fatty acid, salts thereof and mixtures thereof; or (ii) a fumaric acid ester selected from an ester of fumaric acid and a C12 to C22 fatty alcohol, salts thereof and mixtures thereof.

The present invention relates to novel radiation-curing powder coating binders containing maleic and/or fumaric acid esters and one or more amorphous or partially crystalline resins containing at least one group that reacts with ethylenically unsaturated compounds under the action of actinic radiation to form a polymer. The binders have a glass transition temperature ranging from 30 to 90° C. The binders can be used as a constituent in coating compositions.

The present invention relates to a polyurea coating composition comprising (A) a polyisocyanate; (B) a polyaspartic ester; and (C) an aspartic ester. The polyaspartic ester (B) is represented by the structure below:

where Z=a cycloalkyl, alkyl or aryl group, R₁, R₂=alkyl groups containing 1-10 carbon atoms; and n=2-4. The aspartic ester (C) is derived from a secondary heterocyclic amine in a 3-7 membered ring compound bearing at least one secondary amine functionality. This invention also relates to use of a polyurea coating composition comprising (A)-(C) for the preparation of a polyurea coating. This invention further relates to a process for preparing a polyaspartic/aspartic ester mixture in-situ by initially reacting an ester of fumaric acid or maleic acid with a polyamine and then reacting the unreacted ester of fumaric acid or maleic acid to completion with a secondary heterocyclic amine. This method makes it possible to prepare a polyurea coating without maleic acid or fumaric acid esters thereby providing a safer and more environmentally friendly product.

The present invention provides a new high-molecular-weight fumaric acid diester-cinnamate copolymer that can be expected to maintain excellent strength or have excellent toughness when it is formed into a film, a method for efficiently producing it, and a method using its membrane. Fumaric acid diester-cinnamic acid ester copolymer containing fumaric acid diester residue units, cinnamate residue units having an alkyl group having 1 to 6 carbon atoms, and having two or more radically polymerizable functional groups residue units of multifunctional monomers.