摘要:
There is disclosed a process for the preparation of N,N-diisopropylbenzothiazyl-2-sulfenamide which comprises contacting an aqueous mixture of diisopropylamine and 2-mercaptobenzothiazole with an oxidizing agent in the presence of sufficient acid to neutralize the excess base, if any, in the oxidizing agent wherein the molar ratio of diisopropylamine to 2-mercaptobenzothiazole is at least 1.5 to 1.
摘要:
The subject invention provides a means for modifying existing polyester polymers to optimize characteristics for solid state polymerization and for utilization in a wide array of specific applications. For instance, the modification technique of this invention may be used to adjust the melting point, crystallization temperature (either from the solid or on cooling from the melt), glass transition temperature, natural stretch ratio, barrier properties, melt strength, and/or solid state polymerization characteristic of the polyester. Application of the instant invention could result in a polymer with substantially different physical properties, potentially allowing its use in heretofore high cost, specialty applications. A further advantage of the invention is that recycled polymer may be modified to broaden its potential uses into more demanding higher performance applications.
摘要:
A method is disclosed for manufacturing one or more oxygen scavenging particles, wherein the particle(s) comprises an oxidizable metal particle, such as elemental iron; an acidifying electrolyte such as sodium or potassium bisulfate and optionally a water hydrolysable Lewis acid, such as aluminum chloride. The method comprises the step of coating the oxidizable particle with a first compound and then reacting the first compound with a second compound to form a third compound, wherein the third compound promotes the reaction of the oxidizable particle with oxygen.
摘要:
A method is disclosed for manufacturing one or more oxygen scavenging particles, wherein the particle(s) comprises an oxidizable metal particle, such as elemental iron; an acidifying electrolyte such as sodium or potassium bisulfate and optionally a water hydrolysable Lewis acid, such as aluminum chloride. The method comprises the step of coating the oxidizable particle with a first compound and then reacting the first compound with a second compound to form a third compound, wherein the third compound promotes the reaction of the oxidizable particle with oxygen.
摘要:
This invention relates to bis-(2,5-polythio-1,3,4-thiadiaxoles), a method for their preparation and their use in rubber compounds. Use of these compounds provide for excellent vulcanization of rubbers and result in an improved final rubber vulcanizate possessing good physical properties.
摘要:
There is disclosed compounds having, within their structural formulae, a trivalent moiety: ##STR1## which exhibit antiozonant activity when added to rubber compositions at antiozonant effective levels and which exhibit synergistic antiozonant activity when used with conventional antiozonants in rubber compositions. There is also disclosed novel compounds which can be used as antiozonants.
摘要:
This invention discloses a method of making an oxygen scavenging particle comprised of an activating component and an oxidizable component wherein one component is deposited upon the other component from a vapor phase and is particularly useful when the activating component is a protic solvent hydrolysable halogen compound and the oxygen scavenging particle is a reduced metal.
摘要:
This invention discloses a method of making an oxygen scavenging particle comprised of an activating component and an oxidizable component wherein one component is deposited upon the other component from a vapour phase and is particularly useful when the activating component is a protic solvent hydrolysable halogen compound and the oxygen scavenging particle is a reduced metal.
摘要:
Free radically curable rubbers are crosslinked with the aid of a free radical initiator and a co-curing agent, which is an acrylate or methacrylate ester of a hydroxybenzene or hydroxynaphthalene compound containing two or more hydroxyl groups, at least two of which are esterified. The rubbers which are used in the present invention are natural rubber and synthetic rubbers derived from a diene monomer. Preferred co-curing agents are acrylate and methacrylate esters of hydroxybenzene compounds in which the ester contains two or three acrylate or methacrylate groups per molecule. The amount of co-curing agent may be about 1-50 parts by weight per one hundred parts by weight of rubber (phr). Outstanding abrasion resistance and air oven aging are observed.
摘要:
This invention relates to the use of compounds such as 3,5-dibutyl-1,3,5-oxadiazine-4-thione and tetrahydro-5-(2-butyl)-(S)-triazinethione as stabilizers to improve the dye fastness of colored fibers.