Compositions: coating or plastic – Coating or plastic compositions – Contains fireproofing or biocidal agent
Reexamination Certificate
1999-08-12
2002-05-07
Green, Anthony (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Contains fireproofing or biocidal agent
C106S018320, C106S018360, C424S618000, C424S619000, C424S630000, C424S632000, C424S633000, C424S634000, C424S635000, C424S638000, C502S240000, C502S243000, C502S244000, C502S302000, C502S324000, C502S340000, C502S341000, C502S342000, C502S343000, C502S344000, C502S345000, C502S346000, C502S347000, C502S348000, C502S349000, C502S350000, C502S351000, C502S353000
Reexamination Certificate
active
06383273
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to compositions containing a biocidal compound or an adsorbent and/or catalyst compound and methods of making and using therefor.
2. Background Art
The use of certain metal ions as antibacterial and antimicrobial agents are known in the art. For example, silver ions, copper ions, and zinc ions are useful antimicrobial agents. Typically, these metal ions are incorporated into a support system, wherein the support material ultimately releases the antimicrobial agent into an environment containing the microbial agent.
Typically, the process for preparing the antimicrobial/support system generally involves contacting the support material with a solution containing the metal ion that possesses antimicrobial activity, then drying the resultant particle. Examples of this process are disclosed in Japanese Patent Application No. 3275627; Japanese Patent Application No. 5201817; Japanese Patent Application No. 6056613; Japanese Patent Application No. 6080528; Japanese Patent Application No. 6272173; Japanese Patent Application No. 8165208; Japanese Patent Application No. 9267070; Japanese Patent Application No. 10130885; International Application No. WO 9723594 to Walker; U.S. Pat. No. 5,827,524 to Hagiwara et al.; U.S. Pat. No. 4,504,387 to LeMire et al.; and U.S. Pat. No. 5,441,717 to Ohsumi et al. A disadvantage of this process is that the antimicrobial compound rapidly deadsorbs from the support, which results in reduced biocidal activity over time as well as the introduction of high levels of the antimicrobial compound into the environment.
Another process for incorporating silver into a support material involves the addition of a reducing agent to a mixture composed of the support material and a silver salt. The process results in the in situ reduction of the silver salt. U S. Pat. No. 4,396,512 to Beauman et al.; U S. Pat. No. 5,824,267 to Kawasumi et al.; U S. Pat. No. 4,407,865 to Nice; U S. Pat. No. 4,130,506 to Collier et al.; U S. Pat. No. 4,126,582 to Diem et al.; and U S. Pat. No. 4,353,741 to Capuano et al. disclose the in situ reduction of a silver salt. None of these patents, however, disclose nor appreciate the benefits of drying and/or heating the support and the silver salt prior to contacting with the reducing agent.
There has been a need in the art for compositions that can release a biocidal compound at a desired rate that is dependent upon the bioactive agent that is to be reduced or eliminated from an environment. There is also a need for compositions that can reduce or eliminate a bioactive agent in an environment for an extended period of time. Additionally, there is also a need for compositions that can reduce or eliminate a wide variety of bioactive contaminants. Finally, there is a need for compositions that can reduce or eliminate a bioactive agent in an environment that is present in high concentrations.
There is also a need for compositions that contain an adsorbent and/or catalyst compound that can reduce or eliminate a variety of contaminants over an extended period of time from an environment.
Applicants have developed new methods for preparing compositions containing a biocidal compound or an adsorbent and/or catalyst particle that address the needs described above. None of the above-cited documents disclose the compositions or processes such as those described and claimed herein.
SUMMARY OF THE INVENTION
In accordance with the purpose(s) of this invention, as embodied and broadly described herein, this invention, in one embodiment, relates to a process for producing a composition containing a biocidal compound, comprising:
(a) admixing a support with a first biocidal compound to produce a mixture;
(b) heating the mixture produced in step (a) at from 80 to 1,800° C. to produce a heated mixture; and
(c) contacting the heated mixture produced in step (b) with a reducing agent to reduce at least some of the first biocidal compound to produce a first reduced biocidal/support composition.
The invention further relates to a process for producing a composition containing a biocidal compound comprising:
(a) admixing a support with a first biocidal compound to produce a mixture;
(b) heating the mixture produced in step (a) at from 80 to 1,800° C. to produce a heated mixture;
(c) contacting the heated mixture produced in step (b) with a reducing agent to reduce at least some of the first biocidal compound to produce a first reduced biocidal/support composition; and
(d) oxidizing at least some of the first biocidal compound in the first reduced biocidal/support composition to produce a first oxidized biocidal/support composition.
The invention further relates to a process for producing a composition containing a biocidal compound, comprising:
(a) admixing a support with a biocidal compound to produce a mixture;
(b) drying the mixture to produce a dried mixture; and
(c) contacting the dried mixture produced in step (b) with a reducing agent to reduce at least some of the biocidal compound to produce a reduced biocidal/support composition.
The invention further relates to a process for producing a composition containing a biocidal compound comprising:
(a) admixing components comprising:
(1) a support;
(2) a binder comprising a colloidal metal oxide or colloidal metalloid oxide;
(3) a first biocidal compound; and
(4) an acid;
(b) removing a sufficient amount of water to cross-link the binder with itself, the support, and/or the first biocidal compound to produce a first binder/biocidal composition; and
c) contacting the first binder/biocidal composition produced in step (b) with a reducing agent to reduce at least some of the first biocidal compound to produce a first reduced biocidal/support composition.
The invention further relates to a process for producing a composition containing a biocidal compound comprising:
(a) admixing components comprising:
(i) a binder comprising a colloidal metal oxide or colloidal metalloid oxide,
(ii) a support, and
(iii) an acid,
(b) removing a sufficient amount of water from the mixture to cross-link the binder with itself and/or the support to produce a binder/support system; and
(c) admixing the binder/support system produced in step (b) with a first biocidal compound to produce a first binder/biocidal composition.
The invention further relates to a process for producing a composition containing an adsorbent and/or catalyst compound, comprising:
(a) admixing a support with a first adsorbent and/or catalyst compound to produce a mixture;
(b) heating the mixture produced in step (a) at from 80 to 1,800° C. to produce a heated mixture; and
c) contacting the heated mixture produced in step (b) with a reducing agent to reduce at least some of the first adsorbent and/or catalyst compound to produce a first reduced adsorbent and/or catalyst/support composition.
The invention further relates to a process for producing a composition containing an adsorbent and/or catalyst compound comprising:
a) admixing a support with a first adsorbent and/or catalyst compound to produce a mixture;
(b) heating the mixture produced in step (a) at from 80 to 1,800° C. to produce a heated mixture;
(c) contacting the heated mixture produced in step (b) with a reducing agent to reduce at least some of the first adsorbent and/or catalyst compound to produce a first reduced adsorbent and/or catalyst/support composition; and
(d) oxidizing at least some of the first adsorbent and/or catalyst compound in the first reduced adsorbent and/or catalyst/support composition to produce a first oxidized adsorbent and/or catalyst/support composition.
The invention further relates to a process for producing a composition containing an adsorbent and/or catalyst compound, comprising:
(a) admixing a support with an adsorbent and/or catalyst compound to produce a mixture;
(b) drying the mixture to produce a dried mixture; and
(c) contacting the dried mixture produced in step (b) with a reducing agent to reduce at least some of the adsorbent and/or catalyst compound to produce a reduced adso
Kepner Bryan E.
Mintz Eric A.
Apyron Technologies, Incorporated
Green Anthony
Needle & Rosenberg P.C.
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