摘要:
Symmetrical ethers are prepared in high yield by reacting an alkyl halide, sulfate, or sulfonate with base in the presence of a catalytic amount of both an onium salt and a carboxylate salt. For example, dibenzyl ether is produced in yields exceeding 95 percent by contacting benzylchloride with a 50 percent sodium hydroxide solution in the presence of a catalytic amount of both tetra-n-butylammonium bisulfate and sodium acetate.
摘要:
Disclosed are packages, cartons, cases, and trays comprising a hot melt adhesive, in turn comprising at least one first homogenous linear or substantially linear ethylene polymer having a particular density and melt viscosity at 350° F. (177° C.), up to 60 weight percent wax and up to 40 weight percent tackifier. In particular, disclosed are packages, cartons, cases, and trays comprising a hot melt adhesive characterized by: a) at least one homogeneous linear or substantially linear interpolymer of ethylene with at least one C3-C20 &agr;-olefin interpolymer having a density from 0.850 g/cm3 to 0.895 g/cm3; and b) up to 60 weight percent of at least one tackifying resin; and c) up to 40 weight percent of at least one wax, wherein the hot melt adhesive has a viscosity of less than about 5000 cPs (50 grams/(cm.second)) at 150° C.
摘要翻译:公开了包括热熔粘合剂的包装,纸箱,壳体和托盘,其又包含至少一种在350°F(177℃)下具有特定密度和熔体粘度的第一均匀线性或基本线性乙烯聚合物, 至60重量%的蜡和至多40重量%的增粘剂。 特别地,公开了包含热熔粘合剂的包装,纸箱,壳和托盘,其特征在于:a)至少一种乙烯与至少一种具有0.850密度的C 3 -C 20α-烯烃互聚物的均匀线性或基本上线性的互聚物 g / cm 3至0.895g / cm 3; 和b)至多60重量%的至少一种增粘树脂; andc)至多一种蜡的至多40重量%,其中该热熔粘合剂在150℃下具有小于约5000cPs(50克/(cm·sec))的粘度)
摘要:
This invention is a process for cyclizing an ortho-alkenyl arenol, wherein the double bond of the alkenyl moiety is one or two carbons removed from the aromatic ring, with carbon monoxide, wherein the process comprises contacting an ortho-alkenyl arenol with carbon monoxide in the presence of a catalytic amount of a catalyst comprising (1) a rhodium-carbonyl complex and (2) an amine with a pK.sub.a of 6 or greater, arsine, phosphine, stibine or mixture thereof, under conditions such that a lactone-fused aromatic compound is prepared.
摘要:
An epoxy resin prepared from a component comprising a bisphenol F having high ortho isomer content is claimed. Ortho isomer content is defined as follows:(A+2B)/2A: content of ortho-para isomer of a bisphenol FO: content of ortho-ortho isomer of a bisphenol FThe epoxy resin of the present invention has lower viscosity (e.g. melt viscosity, solution viscosity) and good physical properties (e.g. flexibility), and suitable for various applications such as coating materials, electrical laminates, adhesives, molding products, encapsulation materials, etc.
摘要:
An all-plastic drum construction permits a variety of sizes and capacity of drum by utilizing an extruded tube for the drum side walls of selected diameter and length proportional to the drum capacity desired. An injection molded bottom closure is welded to the bottom end of the tube by a thermoplastic bonding material having dispersed iron particles which are excited when exposed to induction heating thereby facilitating the melting of the thermoplastic. This welding material is disposed within a cavity defined by the bottom closure and bottom end of the tube and when subjected to induction heating and pressure fills the cavity to effectuate the bond between surfaces of the bottom closure and bottom end of the tube. A tight head drum is formed by securing by a similar welding technique a top closure to the upper end of the tube. In forming an open head drum, a thermoplastic chime is initially welded in similar fashion to the upper end of the tube. Thereafter, a top cover is releasably secured to the chime by a locking rim assembly.
摘要:
Advanced resins and unadvanced epoxy resins are disclosed wherein the unadvanced compound and at least a portion of the advanced epoxy resin contains at least one --O--R.sup.1 --O-- or --(O--CH.sub.2 --CHR.sup.2).sub.n --O-- group as a bridge between two groups selected independently from the group consisting of (1) a saturated or unsaturated cycloaliphatic group, (2) an aromatic group, (3) a group represented by the formula ##STR1## or (4) a group represented by the formula ##STR2## Also disclosed are nucleophilic derivatives thereof, as well as curable compositions and coating compositions containing the advanced or unadvanced epoxy resins or nucleophilic modified advanced or unadvanced epoxy resins. These advanced resins and unadvanced epoxy resins provide coatings with good flexibility or formability as exhibited by good flexural or formable properties determined by reverse impact, T-bend and wedge-bend tests, chip resistance, and with good corrosion resistance and throwpower.
摘要:
1-Butenes are selectively produced via the dimerization of 1-olefins in the presence of novel organotantalum catalysts comprising tantalum and a silyl-substituted cyclopentadienyl moiety having the formula C.sub.5 H.sub.5-x (SiR.sup.6.sub.3).sub.x, wherein each R.sup.6 may be the same or different and is hydrogen, alkyl, cycloalkyl, aryl, aralkyl or alkoxy, and x is an integer from 1 to 5.
摘要:
The present invention pertains to a container for shipping and storing a substance at a constant temperature. The container is made up of an inner liner with outlets, an insulating shell enveloping the liner and a fiber drum which houses the shell and the liner. A slip-on removal cover is used to close the drum.
摘要:
A closure is provided for a container opening. The opening is defined by a neck extending outwardly from the top of the container. The closure includes a liner cap disposed both interiorly and exteriorly of the neck and defines a central passage. A plug extends across the top of the cap to close off the passage from the exterior. The plug is provided with at least one longitudinal hole. The lower end of the plug has attached thereto a membrane extending across the passage. This membrane does not permit liquids within the container to pass therethrough, but possesses the property of being capable of venting gasses therethrough. A dust cap may extend across the top of the closure during shipment and storage.
摘要:
Disclosed are hot melt adhesives comprising at least one first homogeneous linear etylene polymer having a particular density and melt viscosity at 350.degree.F. (177.degree.C.), and an optional wax and tackifier. In particular, disclosed is a hot melt adhesive characterized by: a) at least one homogeneous linear or substantially linear interpolymer of ethylene with at least ibe C.sub.2 --C.sub.20 .alpha.-olefin interpolymer having a density from 0.850 g/cm.sup.3 to 0.895 g/cm.sup.3 ; and b) optionally at least one tackifying resin; and c) optionally at least one wax wherein the hot melt adhesive has a viscosity of less than about 5000 cPs (50 grams/cm.second) at 150.degree.C. Preferred hot melt adhesives for use in adhering cardboard or paperboard are disclosed, as well as the resultant adhered products. Also disclosed is a dual reactor process for the preparation of the inventive hot melt adhesives.