DRAG REDUCING AGENTS

• Main Authors: ZOU, Jian, VITTUR, Brandon M, BRAVO, Anthony D, JUREK, David J
• Format: Patent
• Language: English; French
• Published: 17.12.2020
• Subjects: ADHESIVES; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING; WORKING-UP

A drag reducing agent has a core comprising a polyolefin; and a temporary container encapsulating the core. The temporary container contains a container material, which includes an ethylene vinyl acetate copolymer, an ethylene vinyl alcohol copolymer, a polyvinylpyrrolidone, an ethylene vinylpyrrolidone copolymer, a vinylpyrrolidone vinyl acetate copolymer, a polyvinyl acetate, a polyvinyl alcohol, a polyethylene oxide, a polyethylene glycol, polyvinylidene chloride, a polysaccharide or its derivative, or a combination comprising at least one of the foregoing. A largest dimension of the drag reducing agent is greater than about 1,000 microns. L'invention concerne un agent réducteur de frottement doté d'un noyau comprenant une polyoléfine ; et un contenant temporaire encapsulant le noyau. Le contenant temporaire contient un matériau de contenant qui comprend un copolymère d'éthylène-acétate de vinyle, un copolymère d'éthylène-alcool vinylique, une polyvinylpyrrolidone, un copolymère d'éthylène-vinylpyrrolidone, un copolymère de vinylpyrrolidone-acétate de vinyle, un poly(acétate de vinyle), un alcool polyvinylique, un oxyde de polyéthylène, un polyéthylène glycol, un chlorure de polyvinylidène, un polysaccharide ou son dérivé, ou une combinaison comprenant au moins l'un de ces éléments. La plus grande dimension de l'agent réducteur de frottement est supérieure à environ 1 000 microns.