IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0499285
(1995-07-07)
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발명자
/ 주소 |
- Birbara Philip J. (Windsor Locks CT) Couch Harold T. (Canton CT) Genovese Joseph E. (East Granby CT) Rethke Donald W. (Granby CT)
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출원인 / 주소 |
- United Technologies Corporation (Hartford CT 02)
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인용정보 |
피인용 횟수 :
5 인용 특허 :
0 |
초록
▼
The present invention provides water-soluble, extended-release chemical formulations, in tablet form, for urine pretreatment, that require minimal, if any, use of a binder component, yet are non-dusting, pliable, structurally strong, and not weakened by exposure to aqueous streams. The present inven
The present invention provides water-soluble, extended-release chemical formulations, in tablet form, for urine pretreatment, that require minimal, if any, use of a binder component, yet are non-dusting, pliable, structurally strong, and not weakened by exposure to aqueous streams. The present invention also provides a simple and reliable method for controlled dispensing of such tableted formulations into a liquid stream that is particularly advantageous for use in micro-gravity environments, such as spacecraft urinal systems.
대표청구항
▼
A water soluble, extended-release chemical formulation, in tablet form, for controlling and preventing microbial growth and/or for controlling and preventing precipitation of solids in and transfer of odorous gases from urine, which comprises: a. from about 5 to about 97% by weight of a biocide; and
A water soluble, extended-release chemical formulation, in tablet form, for controlling and preventing microbial growth and/or for controlling and preventing precipitation of solids in and transfer of odorous gases from urine, which comprises: a. from about 5 to about 97% by weight of a biocide; and, optionally, b. from about 25 to about 90% by weight of an organic acid or from about 10 to about 75% by weight of an acid salt; and c. from about 1.5 to about 10% by weight of an extended-release binder, wherein said biocide is an acid oxidizing compound selected from the group consisting of monopersulfate compounds, copper sulfate, silver nitrate, and mixtures thereof, wherein said organic acid is selected from the group consisting of citric, oxalic and maleic acids, and mixtures thereof, wherein said acid salt is selected from the group consisting of potassium bisulfate, sodium bisulfate, cupric chloride, silver nitrate, and mixtures thereof, wherein said binder is comprised of: at least one polyol having an average molecular weight ranging from about 600 to about 20,000 grams/mole; and, optionally, polyethylene oxide, and wherein said chemical formulation is prepared by a method comprising: preparing a mixture comprising: said biocide; and/or said organic acid or said acid salt; and said binder; heating said prepared mixture to a temperature of from about 45°C. to about 70°C.; cooling said heated mixture to ambient temperature; and pressing said cooled mixture into at least one tablet, where the sum of components A, B and C total 100% by weight.
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