Abstract:
Verbindungen der Formel (I), R bis R 6 unabhängig voneinander Wasserstoff oder Alkyl und R 7 und R 8 Methyl bedeuten, und worin mindestens eines der Kohlenstoffatome C α , C ß oder C γ zwei voneinander verschiedene Reste R bis R 6 aufweist, eignen sich als Weichmacher für Kunststoffe und hier insbesondere für Homo- und Copolymere des Vinylchlorids, wie PVC.
Abstract:
Zusammensetzungen der Formel (I), worin R und R 1 unabhängig voneinander Wasserstoff oder Methyl, R 2 Alkyl und R 3 Wasserstoff oder Alkyl bedeuten, wobei der Gehalt an Verbindungen der Formel (I) mit R = R 1 = Methyl 80 bis 99 Gew.-% beträgt, eignen sich als Weichmacher für Kunststoffe und hier insbesondere für Homo- und Copolymere des Vinylchlorids, wie PVC.
Abstract:
To provide elastic fabric that has comfortable wear and fit even in thin and light fabric by using a high-powered polyurethane elastic fiber that has at least 1.5 times the active force and recovery per unit fineness at the time of 100 to 200% elongation compared to conventional polyurethane elastic fiber. RESOLUTION MEANS An elastic fabric comprising a polyurethane elastic fiber made of a polyol, with a molecular weight between 450 and 1600 with a ratio of weight average molecular weight to number average molecular weight of at least 1.8, an organic diisocyanate compound, and a diamine compound.
Abstract:
A process for preparing a hydrocyanation catalyst comprising contacting a bidentate phosphorous-containing ligand with nickel chloride in the presence of a nitrile solvent and a reducing metal which is more electropositive than nickel the nickel chloride being introduced as an aqueous solution and the water being removed concurrently with the reduction reaction by azeotropic distillation.
Abstract:
This document describes biochemical pathways for producing 2(E)-heptenedioyl-CoA methyl ester from precursors such as 2-oxo-glutarate, acetyl-CoA, or succinyl-CoA using one or more of a fatty acid O-methyltransferase, a thioesterase, a CoA-transferase, a CoA ligase , as well as recombinant hosts expressing one or more of such enzymes. 2(E)-heptenedioyl-CoA methyl ester can be enzymatically converted to pimeloyl-CoA using a trans-2-enoyl-CoA reductase , and a methylesterase . Pimeloyl-CoA can be enzymatically converted to pimelic acid, 7-aminoheptanoate, 7-hydroxyheptanoate, heptamethylenediamine, or 1,7-heptanediol.
Abstract:
An autoclave heating jacket including a heating fluid collar (200), a fluid inlet (120), a fluid outlet (122), and a plurality of fluid flow baffles (202, 204, 206) is claimed. The heating fluid collar (200) can have an outer wall (208) which includes an upper contact surface (210) and a lower contact surface (212) forming an enclosed chamber when engaged with an outer surface of an autoclave. The fluid inlet (120) can be oriented through the outer wall and is capable of directing a heating fluid into the enclosed chamber. The fluid outlet (122) can be oriented through the outer wall but is capable of directing the heating fluid out of the enclosed chamber. The plurality of fluid flow baffles (202, 204, 206) can be oriented within the enclosed chamber so as to direct the heating fluid along a predetermined pathway within the enclosed chamber. Also claimed is a polymerization autoclave comprising said heating jacket and a heating conduit, as well as a method of repairing such an autoclave by replacing some of the weakened or leaking coil segments with said heating jacket.
Abstract:
Included is a stretchable fabric composite laminate, which includes two outer layers of fabric with a bonded inner layer of elastomeric fibers. The stretchable fabric composite laminate is attached to the garment fabric as an edgeband or strap or within an edgeband or strap to provide a more comfortable garment or greater fit range.
Abstract:
Adiponitrile is made by reacting 3-pentenenitrile with hydrogen cyanide. The 3- pentenenitrile is made by reacting 1,3-butadiene with hydrogen cyanide. The 1,3- butadiene feed includes a small amount of tertiary-butylcatechol. The catalyst for the reaction of 1,3-butadiene with hydrogen cyanide to make 3-pentenenitrile is recycled. At least a portion of the recycled catalyst is purified by an extraction process.
Abstract:
The invention relates to a process for hydrolyzing water-insoluble epoxides, and more particularly to a process for preparing diols. Specifically disclosed is a method for preparing 4-vinylcyclohexane-1,2-diol, 1,2-cyclohexane diol and 1,2-cyclododecane diol.
Abstract:
A method for recovering hexamethylene diamine (HMD) from a mixture comprising HMD, 6-aminocapronitrile (ACN) tetrahydroazepine (THA), and ADN comprising: (a) introducing the mixture into a distillation column capable of separating as a group the HMD, ACN and at least a portion of the THA from the ADN, while minimizing the isomerization of the ADN into CPI; and (b) introducing the HMD, ACN and at least a portion of the THA into a distillation column capable of separating the HMD from the ACN in such a way that the THA separates along with the ACN.