Desiccant composition containing surface-modified powders of metal oxides useful for manufacture and protection of moisture-sensitive devices
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-020/22
B01J-020/30
B01J-020/28
B01J-020/06
B01J-020/04
C01G-009/02
C01G-045/02
출원번호
US-0344259
(2013-02-19)
등록번호
US-9662631
(2017-05-30)
우선권정보
IT-MI2012A0999 (2012-06-08)
국제출원번호
PCT/IB2013/051333
(2013-02-19)
국제공개번호
WO2013/182917
(2013-12-12)
발명자
/ 주소
Gigli, Jiabril
Macchi, Giorgio
Mudu, Marco
Vacca, Paolo
출원인 / 주소
SAES GETTERS S.P.A.
대리인 / 주소
Steinfl + Bruno LLP
인용정보
피인용 횟수 :
0인용 특허 :
6
초록▼
A desiccant composition is described. The desiccant composition has a polymeric binder and a dispersion of powders of hygroscopic inorganic oxides as desiccant materials, in which the desiccant powders are finely dispersed in consequence of their surface-modification by fatty acid anions without aff
A desiccant composition is described. The desiccant composition has a polymeric binder and a dispersion of powders of hygroscopic inorganic oxides as desiccant materials, in which the desiccant powders are finely dispersed in consequence of their surface-modification by fatty acid anions without affecting their moisture sorption performances.
대표청구항▼
1. A desiccant composition consisting of: particles of at least one first hygroscopic inorganic oxide and a polymeric binder, said particles of at least one first hygroscopic inorganic oxide having an external surface and being selected in the group consisting of alkali metal oxides, alkaline-earth
1. A desiccant composition consisting of: particles of at least one first hygroscopic inorganic oxide and a polymeric binder, said particles of at least one first hygroscopic inorganic oxide having an external surface and being selected in the group consisting of alkali metal oxides, alkaline-earth metal oxides, manganese oxide and zinc oxides,whereinsaid particles of at least one first hygroscopic inorganic oxide have dimensions in the range of from 0.05 μm to 20 μm and are functionalized at said external surface by anions of general formula CnH2n+1COO−, wherein n is an integer number greater than 11. 2. The desiccant composition according to claim 1, wherein n is between 13 and 23. 3. The desiccant composition according to claim 2, wherein said anions of general formula CnH2n+1COO− are selected in the group consisting of tetradecanoate, hexadecanoate, octadecanoate, icosanoate, docosanoate, tetracosanoate. 4. The desiccant composition according to claim 1, wherein said first hygroscopic inorganic oxide is selected in the group consisting of lithium, magnesium, calcium, strontium and barium oxides. 5. The desiccant composition according to claim 1, wherein the particles of said first hygroscopic inorganic oxide are in amount of between 5% and 50% by weight with respect to the total composition weight. 6. The desiccant composition according to claim 1, wherein the molar ratio of said anions of general formula CnH2n+1COO− with respect to said first hygroscopic inorganic oxide is higher than 1:100. 7. A desiccant composition consisting of: particles of at least one first hygroscopic inorganic oxide and a polymeric binder, said particles of at least one first hygroscopic inorganic oxide having an external surface and being selected in the group consisting of alkali metal oxides, alkaline-earth metal oxides, manganese oxide and zinc oxides,whereinsaid particles of at least one first hygroscopic inorganic oxide have dimensions in the range of from 0.05 μm to 20 μm and are functionalized at said external surface by anions of general formula CnH2n+1COO−, wherein n is an integer number greater than 11, anda second hygroscopic inorganic oxide. 8. The desiccant composition according to claim 7, wherein said second hygroscopic inorganic oxide is selected among lithium oxide and magnesium oxide. 9. The desiccant composition according to claim 7, wherein the weight concentration of said second hygroscopic inorganic oxide is comprised between 10 and 50 w/w % respect to the total hygroscopic inorganic oxide content. 10. The desiccant composition according to claim 1, wherein said polymeric binder is selected in the group consisting of epoxy resins, epoxyacrylic resins, acrylic resins, polyurethane resins and siloxane matrices. 11. A moisture-sensitive device containing a desiccant body or film comprising the desiccant composition according to claim 1. 12. The moisture-sensitive device according to claim 11, wherein said moisture-sensitive device is selected in the group consisting of microelectromechanical devices, micro-opto-electromechanical devices, opto-electronic devices for telecommunication applications, medical implantable devices, organic solar cells and organic electronic devices. 13. The desiccant composition according to claim 1, wherein said particles of at least one first hygroscopic inorganic oxide have dimensions in the range from 0.1 to 10 μm. 14. The desiccant composition according to claim 1, wherein the particles of said first hygroscopic inorganic oxide are in amount of between 30% and 50% by weight with respect to the total composition weight. 15. The desiccant composition according to claim 1, wherein the anion of general formula CnH2n+1COO− is comprised in a corresponding carboxylate salt of a metal selected in the group consisting of alkali metals, alkaline-earth metals, manganese and zinc. 16. The desiccant composition according to claim 7, wherein the second hygroscopic inorganic oxide is not functionalized by the anions of general formula CnH2n+1COO−. 17. The desiccant composition according to claim 16, wherein the second hygroscopic inorganic oxide has a lower molecular weight and lower surface area than the first hygroscopic inorganic oxide. 18. The desiccant composition according to claim 1, wherein the desiccant composition has a sorption capacity of at least 25% by weight. 19. The desiccant composition according to claim 7, wherein the desiccant composition has a sorption speed of 2.0 mg cm−2 min−1 at 22° C. and 55% relative humidity.
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이 특허에 인용된 특허 (6)
Hoover, James W., Desiccant dispersion for rubber compounds.
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