Sodium percarbonate particles having a shell layer comprising thiosulfate
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C11D-007/38
C11D-007/54
C11D-007/34
출원번호
UP-0667300
(2005-10-12)
등록번호
US-7718592
(2010-06-10)
우선권정보
DE-10 2004 054 495(2004-11-11)
국제출원번호
PCT/EP2005/010952
(2005-10-12)
§371/§102 date
20070920
(20070920)
국제공개번호
WO06/050778
(2006-05-18)
발명자
/ 주소
Zimmermann, Klaus
Jakob, Harald
출원인 / 주소
Degussa, GmbH
대리인 / 주소
Law Office of: Michael A. Sanzo, LLC
인용정보
피인용 횟수 :
3인용 특허 :
46
초록▼
Coated sodium percarbonate particles, having an inner shell layer which comprises at least one inorganic, hydrate-forming salt as the main constituent, and an outer shell layer which comprises an alkali metal thiosulfate, an alkaline earth metal thiosulfate and/or an ammonium thiosulfate, are stable
Coated sodium percarbonate particles, having an inner shell layer which comprises at least one inorganic, hydrate-forming salt as the main constituent, and an outer shell layer which comprises an alkali metal thiosulfate, an alkaline earth metal thiosulfate and/or an ammonium thiosulfate, are stable to storage and have an improved storage stability in detergents and cleaning agents. Detergents and cleaning agents which comprise such sodium percarbonate particles show a reduced oxidative attack on oxidation-sensitive constituents of the composition during storage. Machine dishwashing agents in the form of tablets which comprise such sodium percarbonate particles and a corrosion protection agent for silver show a reduced yellowing of the tablets during storage.
대표청구항▼
The invention claimed is: 1. Coated sodium percarbonate particles, comprising a) a core of sodium percarbonate; b) an inner shell layer comprising at least one inorganic, hydrate-forming salt as the main constituent; and c) an outer shell layer comprising an alkali metal thiosulfate, an alkaline ea
The invention claimed is: 1. Coated sodium percarbonate particles, comprising a) a core of sodium percarbonate; b) an inner shell layer comprising at least one inorganic, hydrate-forming salt as the main constituent; and c) an outer shell layer comprising an alkali metal thiosulfate, an alkaline earth metal thiosulfate and/or an ammonium thiosulfate. 2. The sodium percarbonate particles of claim 1, wherein said core has been prepared by fluidized bed build-up granulation or by crystallization. 3. The sodium percarbonate particles of claim 1, wherein said inner shell layer constitutes from 0.1 to 10 wt. % of said coated sodium percarbonate particles. 4. The sodium percarbonate particles of claim 1, wherein said inner shell layer comprises at least 50 wt. % of said inorganic, hydrate-forming salt. 5. The sodium percarbonate particles of claim 1, wherein said inorganic, hydrate-forming salt is selected from the group consisting of sodium sulfate, sodium carbonate, sodium bicarbonate, magnesium sulfate, and mixtures or mixed salts of these compounds. 6. The sodium percarbonate particles of claim 1, wherein said inorganic, hydrate-forming salt is sodium sulfate. 7. The sodium percarbonate particles of claim 1, wherein said inner shell consists of sodium sulfate. 8. The sodium percarbonate particles of claim 1, wherein said outer shell layer constitutes from 0.1 to 10 wt. % of said coated sodium percarbonate particles. 9. The sodium percarbonate particles of claim 1, wherein said outer shell layer comprises at least 50 wt. %. of said alkali metal thiosulfate, alkaline earth metal thiosulfate and/or ammonium thiosulfate. 10. The sodium percarbonate particles of claim 1, wherein said outer shell layer comprises sodium thiosulfate. 11. The sodium percarbonate particles of claim 1, wherein said outer shell layer consists of sodium thiosulfate. 12. The sodium percarbonate particles of claim 1, further comprising an additional shell layer which comprises an alkali metal silicate having a modulus of SiO2 to alkali metal oxide of more than 2.5 as a main constituent. 13. The sodium percarbonate particles of claim 1, comprising additionally on their surface 0.01 to 1 wt. % of a hydrophobized finely divided oxide of the elements Si, Al or Ti or of a mixed oxide of these elements. 14. The sodium percarbonate particles of claim 13, wherein said finely divided oxide is a hydrophobized pyrogenic or precipitated silica. 15. A process for the preparation of coated sodium percarbonate particles, comprising the steps of: a) applying an inner shell layer to a core material of sodium percarbonate by spraying on an aqueous solution in which at least one hydrate-forming inorganic salt is dissolved and b) applying an outer shell layer to the coated material from step a) by spraying on an aqueous solution in which at least one alkali metal thiosulfate, alkaline earth metal thiosulfate and/or ammonium thiosulfate is dissolved. 16. The process of claim 15, wherein said core material is prepared by fluidized bed build-up granulation by spraying an aqueous hydrogen peroxide solution and an aqueous soda solution into a fluidized bed of sodium percarbonate particles and simultaneously evaporating water. 17. The process of claim 15, wherein in steps a) and b) the application of said shell layers is carried out by spraying in a fluidized bed and more than 90% of the water contained in said aqueous solutions is evaporated during the application of the shell layers. 18. A detergent or cleaning agent comprising the coated sodium percarbonate particles of claim 1. 19. The detergent or cleaning agent of claim 18, comprising 1 to 40 wt % of said sodium percarbonate particles. 20. The detergent or cleaning agent of claim 18, comprising pressed shaped bodies wherein said sodium percarbonate particles are a constituent of said pressed shaped bodies. 21. A machine dishwashing agent in the form of tablets, comprising the coated sodium percarbonate particles of claim 1 and a corrosion protection agent for silver. 22. The machine dishwashing agent of claim 21, wherein said corrosion protection agent for silver one or more compounds is selected from the group consisting of: triazoles, benzotriazoles, bisbenzotriazoles, aminotriazoles, alkylaminotriazoles and transition metal complexes thereof.
Bertsch-Frank Birgit,DEX ; Bewersdorf Martin,DEX ; Klasen Claas-Juergen,DEX ; Lieser Thomas,DEX ; Mueller Klaus,DEX ; Rollmann Juergen,DEX, Coated sodium percarbonate particles, a process for their preparation and their use.
Schuette Ruediger,DEX ; Bewersdorf Martin,DEX ; Klasen Claas-Juergen,DEX, Coated sodium percarbonate particles, process for the production thereof and use thereof.
James, Alun P.; Horne, Graham R.; Candy, Tom; Rosler, Richard; Mathes, Manfred, Coated sodium percarbonate particles, process for their preparation, their use in detergent compositions and detergent compositions containing them.
Lee Sang Hwa,KRX ; Kwag Chong Yun,KRX ; Lee Jong Pill,KRX ; Cho Han Seog,KRX, Composite composition comprising sodium percarbonate with improved solubility.
Anja Leonarda M Van Asperen NL; Atze Jan Van der Goot NL; Rene Lammers TH; Seeng Djiang Liem NL; Robert Ernst Niemantsverdriet NL; Mark Van der Veen NL; Patrick Van der Waal NL, Detergent compositions.
Christie Julie Ann (Newcastle upon Tyne GB2) MacBeath Fiona Susan (Newcastle upon Tyne GB2), Detergent compositions containing an organic silver coating agent to minimize silver training in ADW washing methods.
Baillely Gerard Marcel,GBX ; France Paul Amaat Raymond G.,BEX ; Wilinson Carole Patricia D.,BEX, Detergent compositions containing percarbonate and making processes thereof.
Baillely Gerard Marcel,GBX ; Jeffrey Janice,GBX ; Park John Scott,GBX ; Stoddart Barry,GBX, Detergents containing a heavy metal sequestrant and a delayed release peroxyacid bleach system.
Kahn Jay I. ; Smerznak Mark A. ; Meyer Axel,BEX ; Garland Angela L. ; Becks Vincent J. ; Boutique Jean-Pol,BEX, Non-aqueous, particulate-containing liquid detergent compositions with elasticized, surfactant-structured liquid phase.
Agar Joseph Thomas Henry (Lincoln GBX) France Paul Amaat Raymond G. (Bertem BEX) Wilkinson Carole Patricia D. (Bruxelles BEX), Percarbonate bleach particles coated with a partially hydrated crystalline aluminosilicate flow aid.
Tembe Gopal Laxman,INX ; Bandyopadhyay Ashis Ranjan,INX ; Pillai S. Muthukumaru,INX ; Satish Sheo,INX ; Ravindranathan M.,INX, Process for manufacture of linear alpha-olefins using a titanium component and an organoaluminum halide component.
Jayawant Madhusudan D. (Hockessin DE) Yates Paul C. (Talleyville DE), Silica sol stabilizers for improving the stability of sodium percarbonate in solid bleaches and detergents.
Ettlinger Manfred,DEX ; Hartmann Werner,DEX ; Kerner Dieter,DEX ; Meyer Jurgen,DEX, Surface-modified, pyrogenically produced mixed oxides, method of their production and use.
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