Abstract:
A polymeric peroxide comprising a divalent recurring unit having the formula: wherein the recurring unit of Formula I has a 10 hour half-life temperature of at least 80 °C and optionally a divalent recurring unit having the formula: wherein R 1 , R 2 , R 3 , R 5 , X, X 1 , Y, Z, y and z are as defined in the Detailed Description of the Preferred Embodiments and the polymeric peroxide has a molecular weight of 1,000 to 200,000. The polymeric peroxides are derived from hydroxy-hydroperoxides or dihydroxy dialkyl peroxides. These polymeric peroxides can be used for preparing block copolymers and compatibilizing polymer blends and alloys.
Abstract:
A method is disclosed to prepare a uniform, stable dispersion of an additive amount of a water-insoluble, high viscosity liquid polyalkylene glycol derivative in a substantially nonaqueous, water-soluble alkanolamine by combining under pressure a proportionate amount of the total polyglycol derivative to be added to the alkanolamine component, or mixture of alkanolamine and polyglycol derivative, subjecting the mixture to shear stress, and repeating the procedure until a uniform, colloidal dispersion is obtained of the alkanolamine containing the desired additive amount of polyglycol derivative.
Abstract:
A coating applicator is provided for depositing a film on a surface of glass (12) and other substrates by chemical vapor deposition. The applicator includes a pair of opposing coating nozzles (10a and 10b) for applying a vaporized coating chemical reactant in a carrier gas to the surface at such a concentration and velocity that coating of the surface is achieved under substantially reaction rate controlled conditions. Each coating nozzle (10a and 10b) is positioned adjacent the surface (12) with a small clearance (C) therebetween which is open to the outside atmosphere. The opposing coating nozzles are directed toward each other at a selected angle with respect to a normal to the surface (12) of the substrate. The angle and the clearance provide a condition where there is substantially no intermixing of coating vapors with the outside atmosphere.
Abstract:
A hood (300) for making a metal oxide coating on glass articles (103) constitutes a tunnel through which the articles (103) pass along a conveyor. Gas carrying the coating chemical is blown/sucked across the conveyor path from blowing and suction channels (301,302) opposed on opposite sides of the conveyor. To reduce the operational temperatures of sidewall surfaces of the hood on the coating region, the sidewalls are made from tapered segments so that only line edges (312) face onto the conveyor path. Reduced temperature of the sidewall surfaces (314) reduces the formation of deposits thereon in operation.
Abstract:
Organotin catalysts containing at least one direct oxygen-to-tin bond and one direct carbon-to-tin bond, e.g. hydroxybutyltin oxide, monobutyltin tris (2-ethylhexanoate), dibutyltin oxide, are use as esterification catalysts in the production of polyester and polyester-containing compositions and articles. Articles made from such polyester and polyester-containing compositions have low extractable toxicity and are suitable for use in regulated food, beverage, pharmaceutical, and medical-device applications.
Abstract:
An improvement in the functional properties of a brittle substrate such as glass is achieved by application of an aqueous solution of a silane to the surface of the substrate. The solution comprises monomeric materials containing silanols, and incorporates at least one function such as strength, color and radiation modification. The materials of principal interest are silanes with at least one alkoxy group connected to silicon, and preferably having three alkoxy groups. The alkoxy silanes are dissolved in an aqueous solution in concentrations of from 1 to 100% by weight. After application, the coatings are cured. Coated articles are provided with useful characteristics.
Abstract:
Novel functionalized peroxides which may be used as crosslinking, grafting and curing agents, initiators for polymerization reactions and as monomers for condensation polymerizations to form peroxy-containing polymers, which in turn can be used to prepare block and graft copolymers, have the following Formula I :
R¹, R², R³, R⁴, R⁵, R⁶, R⁷, X, Y¹, Y², Y³, Z¹, Z², x, y and z are as defined in the Summary of the Invention. The compounds of Formula I may be prepared by reacting hydroxy-containing tertiary hydroperoxides with diacid halides, phosgene, dichloroformates, diisocyanates, anhydrides and lactones to form the functionalized peroxides. These reaction products may be further reacted, if desired, with dialcohols, diamines, aminoalcohols, epoxides, epoxy alcohols, epoxy amines, diacid halides, dichloroformates and diisocyanates to form additional functionalized peroxides.
Abstract translation:可用作交联,接枝和固化剂的新型官能化过氧化物,用于聚合反应的引发剂和用于缩合聚合的单体以形成过氧化物聚合物,其又可用于制备嵌段和接枝共聚物,具有以下式I : R 1,R 2,R 3,R 4,R 5,R 6,R 7,X,Y 1,Y 2, Y 3,Z 1,Z 2,x,y和z如发明概述中所定义。 式I化合物可以通过使含羟基的叔氢过氧化物与二酸卤化物,光气,二氯甲酸酯,二异氰酸酯,酸酐和内酯反应形成官能化过氧化物来制备。 如果需要,这些反应产物可以进一步与二醇,二胺,氨基醇,环氧化物,环氧醇,环氧胺,二酸卤化物,二氯甲酸酯和二异氰酸酯反应,以形成另外的官能化过氧化物。
Abstract:
Acrylic coating resins with attached light stabilizer functional groups are provided, which resins are prepared by reacting light stabilizer hydrazides, LS-C(=O)-NR³-NH₂, with an acrylic prepolymer containing at least two different types of reactive functional groups, one of which is a hydroxyalkyl ester group and the other is carboxyl, anhydride, epoxy or isocyanate. LS is a light stabilizer moiety, e.g., of formula
wherein R³ is, e.g., hydrogen and R¹⁵ is, e.g., a direct bond. The reaction may be carried out in an inert solvent or in the bulk state. The acrylic resins so produced are particularly useful in the stabilization of enamel or lacquer coatings and exhibit outstanding weatherability and durability. As a result of being chemically bound, the light stabilizers are resistant to loss due to volatility and extractability during typical coatings bake operations and exposure to the elements of weather.
Abstract:
A composition is disclosed for dissolving sulfur and preventing or removing sulfur plugs from sour gas and oil wells or other conduits through which sulfur bearing liquids flow which comprises a major proportion of a liquid or gaseous mercaptan, a minor proportion of a catalyst which is a substantially water-insoluble amine, and minor amount of an activator which is a compound of the formula:
where R is hydrogen, alkyl, aryl or alkaryl and the alkyl moieties have from 1 to 24 carbon atoms, and x and y are independent values between 0 and 24 provided that x or y is at least 1; a method is also disclosed wherein said composition in an effective amount is injected into a conduit to prevent or remove sulfur plugging, and the composition containing dissolved sulfur is optionally recovered.
Abstract:
A method is disclosed to prepare a uniform, stable dispersion of an additive amount of a water-insoluble, high viscosity liquid polyalkylene glycol derivative in a substantially nonaqueous, water-soluble alkanolamine by combining under pressure a proportionate amount of the total polyglycol derivative to be added to the alkanolamine component, or mixture of alkanolamine and polyglycol derivative, subjecting the mixture to shear stress, and repeating the procedure until a uniform, colloidal dispersion is obtained of the alkanolamine containing the desired additive amount of polyglycol derivative.