摘要:
A process to oxidize an olefin wax, comprising: contacting a feedstock olefin wax composition with an oxygen-containing gas at a temperature greater than a melting point of the feedstock olefin wax composition melting point, to prepare an oxidized olefin wax composition wherein the oxidized olefin wax composition has an acid number greater than 1 mg KOH/g oxidized olefin wax composition and a kinematic viscosity at 100° C. less than 70 cSt.
摘要:
An oxidized olefin wax useful as a pour point depressant for hydrocarbon compositions and/or additive to reduce the wax particle size of wax precipitates in hydrocarbon compositions is described. Method for reducing the pour point and/or wax particle size of hydrocarbon composition with an oxidized olefin wax are described.
摘要:
Herein is disclosed multilayer packaging articles comprising an oxygen barrier layer comprising ethylene/vinyl alcohol copolymer (EVOH) (an “EVOH oxygen barrier layer”); an oxygen scavenging layer adjacent thereto, wherein the oxygen scavenging layer comprises a polymer comprising an ethylenic backbone and a cycloalkenyl group having structure I: wherein q1, q2, q3, q4, and r are independently selected from hydrogen, methyl, or ethyl; m is —(CH2)n—, wherein n is an integer from 0 to 4, inclusive, and, when r is hydrogen, at least one of q1, q2, q3, and q4 is also hydrogen; and a third layer adjacent to the oxygen scavenging layer. In addition to the oxygen scavenging function, the oxygen scavenging layer functions as a tie layer to substantially inhibit delamination of the EVOH oxygen barrier layer from the third layer of the packaging article.
摘要:
Herein is disclosed an oxygen scavenging composition, comprising an oxygen scavenging polymer comprising units having structure I: wherein R is selected from the group consisting of —H and —C1-C6 alkyls and n is an integer greater than or equal to 1; and an oxidation catalyst. The oxygen scavenging polymer can be used to form an oxygen scavenging packaging article.
摘要:
Methods of initiating oxygen scavenging are disclosed herein that rely on heat triggering. An oxygen scavenging composition that comprises an oxidizable organic compound and a transition metal catalyst is heated to an extent sufficient to initiate oxygen scavenging. Heat triggering can take place during the manufacture of a film or a packaging article from an oxygen scavenging composition, or it can take place after the film or packaging article has been manufactured.
摘要:
Electrospun scaffolds crosslinked with acrylates and methods of making the same are provided. Because the cross-linking linking is carried out under mild conditions, biologically active agents are incorporated into the scaffolds in a facile manner.
摘要:
Electrospun materials are fabricated using air-flow impedance technology, which results in the production of scaffolds in which some regions are dense with low porosity and others regions are less dense and more porous. The dense regions provide structural support for the scaffold while the porous regions permit entry of cells and other materials into the scaffold, e.g. when used for tissue engineering.
摘要:
This disclosure provides for olefin wax oligomer compositions, methods of producing olefin wax oligomer composition, and methods for oligomerizing olefin waxes. This disclosure encompasses metallocene-based olefin wax oligomerization catalyst systems, including those that include a metallocene and an aluminoxane, a metallocene and a solid oxide chemically-treated with an electron withdrawing anion, and a metallocene, a solid oxide chemically-treated with an electron withdrawing anion, and an organoaluminum compound. The olefin wax oligomers prepared with these catalyst systems can decreased needle penetrations, increased viscosity, and an increased drop melt, making them useful as an additive in candles, stone polishes, liquid polishes, and mold release formulations.
摘要:
A method of producing a wax composition having a constrained carbon number distribution and/or a narrow melting range is described. Additionally, hydrocarbon waxes and hydrocarbon wax compositions having a constrained carbon number distribution and/or melting point are described.
摘要:
In one embodiment, we disclose hardened olefin waxes and processes for preparing them. In another embodiment, we disclose oxidized olefin waxes having low viscosity and processes for preparing them. The waxes are suitable for use as polishes, coatings, or inks, among other uses.