Abstract:
The invention relates to a method for producing a high molecular weight polyethylene terephthalate (PET) via a solid state polymerization system. The method comprises using an acid catalyst to effectuate the conversion of acetaldehyde present within the system to 2 -methyl- 1,3-dioxolane, which can be readily removed. The invention also relates to PET prepared via this process, which can advantageously exhibit low levels of acetaldehyde.
Abstract:
Disclosed herein is a process for preparing 4-(2-sulfoethylcyclohexane)-1,2 diol, at ambient condition and in the presence of a buffer and an initiator, from vinylcyclohexane-1,2-diol.
Abstract:
The invention provides a warp-stretch twill fabric having a face side and a back side and comprising non-elastomeric ends and bare elastomeric ends wherein the ratio of non-elastomeric ends to bare elastomeric ends is from about 2:1 to about 6:1; an elastomeric end face exposure count of 2 occurs less frequently than once per 10 picks; and the elastomeric ends float over no more than 3 picks on the face side.
Abstract:
Disclosed herein are methods for preparing nitrile derivatives and their corresponding amines from 1-,2-,4-trivinylcyclohexane by hydrocyanation, followed by hydrogenation. Also disclosed are novel compounds used in the methods described herein.
Abstract:
Biocatalytic processes for producing a product wherein an aqueous stream comprising at least one fermentable substrate and/or a gaseous stream comprising at least one of CO 2 /H 2 , H 2 , methane, and/or CO are povided to a fermentation zone comprising at least one organism capable of metabolizing a substance present in one of the streams. The fermentation may operate at conditions to mixotrophically metabolize at least one gaseous substrate and at least one substrate present in the aqueous stream.
Abstract:
This document describes biochemical pathways for producing 6- hydroxyhexanoate methyl ester and hexanoic acid hexyl ester using one or more of a fatty acid O-methyltransferase, an alcohol O-acetyltransferase and a monooxygenase , as well as recombinant hosts expressing one or more of such enzymes. 6-hydroxyhexanoate methyl esters and hexanoic acid hexyl ester can be enzymatically converted to adipic acid, adipate semialdehyde, 6-aminohexanoate, 6-hydroxyhexanoate, hexamethylenediamine, and 1,6-hexanediol.
Abstract:
Included are compositions for fibers which include a clay nanoparticle and a wax. The composition provides the fibers with oil and water repellency.
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.