Antimicrobial Resin Coated Proppants

a technology of antimicrobial resin and proppants, which is applied in the direction of sealing/packing, dentistry, borehole/well accessories, etc., can solve the problem of not being able to explain the antiviral effect, and achieve the effect of enhancing their economic viability

Inactive Publication Date: 2016-02-04
AGIENIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0013]In yet another surprising discovery, the preparation of the inventive particles using wet grinding processes enhances their economic viability and provides several other benefits. Such processes may be used to produce functionalized particles of other low water solubility salts and compounds such as silver halides.

Problems solved by technology

One of these is the “oligodynamic effect,” which qualitatively explains the effect on some microorganisms, but cannot explain antiviral effects.

Method used

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  • Antimicrobial Resin Coated Proppants
  • Antimicrobial Resin Coated Proppants
  • Antimicrobial Resin Coated Proppants

Examples

Experimental program
Comparison scheme
Effect test

example 1

Synthesis of CuI Particles Functionalized with PVP at Cu / PVP=1 / 3.3 w / w

[0238]10% PVP solution was made by dissolving 1 g Polyvinylpyrrolidone, mol. wt.=10,000 (Sigma-Aldrich #PVP10) in 9 g water. 2.232 g of this solution solution was added into the solution of 0.211 g Copper(II) acetate monohydrate (Sigma-Aldrich #217557) solution prepared by dissolving 1.057 mmol of the monohydrate in 6.227 g water under stirring. Afterwards, 0.3168 g sodium iodide (2.114 mmol) dissolved in 5 g water was dropped slowly into the copper solution and stirred overnight. Next day, the CuI suspension was washed to remove the formed iodine by extracting 7-10 times 2.5-3 ml with diethyl ether. The remaining ether was separated from the solution by evaporation under vacuum and then water was added to compensate for the loss of weight during processing. The final concentration of copper based on the calculation of metallic copper is 0.48% w / w. Reaction: Cu2++2I−→CuI2 CuI(s)+I2. 10% Aspartic acid solution was ...

example 2

Synthesis of CuI-PEG Dispersion w / pH Modifier

[0240]A dispersion of CuI surface modified with polyethylene glycol (PEG) was prepared in water using nitric acid as a pH modifier. To a reaction flask fitted with a stir bar was added 4.5 g of PEG (MW=10,000), and 0.0476 g CuI (99.999%) and 50 ml of acetonitrile. The mixture was stirred at room temperature for about 30 minutes to give a light green solution. The reaction flask was placed on a rotary evaporator and the solvent removed at 25° C. to a paste-like consistency. The temperature was then increased to 45° C. to complete removal of acetonitrile. This resulted in a yellow powder. This powder was dispersed in 50 ml of DI water and 0.05 ml (0.07 g) of concentrated nitric acid was added to form an off-white mixture. Upon stirring in the dark over night the dispersion became clear to give a light yellow dispersion.

example 3

Preparation of Ag / PVP Dispersion

[0241]To a round bottom flask fitted with a condenser was added 50 ml of DI water (18 Mohm-cm) and 20 g of PVP (10,000 MW, Sigma Aldrich Cat.# PVP10). The mixture was stirred at room temperature to form a clear yellow solution. To this solution was added 0.04926 g of silver nitrate (≧99.0% ACS reagent Sigma Aldrich Cat. #209139) and the solution heated to 70° C. for 7 hours while stirring. During this time the reaction was followed by optical absorption with the formation of the Plasmon peak at 425 nm due to the reduction of silver nitrate to silver metal by PVP. The final dispersion of Ag nano-particles was orange / brown in color and was transparent. Dynamic light scattering on a dilute sample of the dispersion gave a mean particle size of 7 nm.

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Abstract

The invention relates to polymeric coatings on proppants. These coatings have antimicrobial materials incorporated within these coatings. Preferably the antimicrobial materials have low water solubility. These antimicrobial agents are incorporated as particles whose surfaces are modified or these may also be incorporated within porous particles which are then added to the coating formulations. The antimicrobially active agents are incorporated in a fashion so that they can be released from these coatings in the environment of the proppants.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is (i) a continuation in part of co-pending U.S. application Ser. No. 14 / 089,146, filed on Nov. 25, 2013 which application claims priority and is a continuation-in-part of U.S. application Ser. No. 13 / 685,379 filed on Nov. 26, 2012 (now abandoned); and which U.S. application Ser. No. 14 / 089,146, is related to and claims priority from U.S. Provisional Patent Application Ser. Nos. 61 / 800,122 filed on Mar. 15, 2013; 61 / 820,561 filed on May 7, 2013, and 61 / 881,318 filed on Sep. 23, 2013; and (ii) is continuation in part of co-pending U.S. application Ser. No. 14 / 701,001 filed on Apr. 30, 2015 which application in turn claims priority to U.S. Provisional Patent Application Ser. No. 62 / 035,388 filed Aug. 9, 2014, U.S. Provisional Patent Application Ser. No. 61 / 987,477 filed May 1, 2014. The contents of all of the foregoing applications are incorporated herein by reference entirely.FIELD OF THE INVENTION[0002]The invention relat...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09K8/80
CPCC09K2208/10C09K8/805A01N25/12A61K8/25A61Q3/02A61Q17/005A61K9/0014A61K9/06A61K47/32A61K9/08A61K8/0279A61K8/19A61K8/20A61K33/34C09D5/14A61K2800/412C09K8/605A61K8/8176A61K31/555A61K33/38C09D5/1618A61K6/20A61K33/18A61K2300/00A01N43/40A01N59/16A01N59/20A61K6/54C08L33/08C08L33/10C08L33/02A61K6/30C08L33/12
Inventor AGRAWAL, ANOOPUHLMANN, DONALD R.KRASNOW, NICHOLAS R.
Owner AGIENIC
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