Nanoclay hybrids and elastomeric composites containing same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08K-009/04
C01B-033/44
C08K-003/34
C08K-005/17
C08K-009/06
C08K-005/18
출원번호
US-0949456
(2013-07-24)
등록번호
US-9758641
(2017-09-12)
발명자
/ 주소
Schwartz, Adam
출원인 / 주소
T.G.L. S.P. Industries Ltd.
인용정보
피인용 횟수 :
0인용 특허 :
24
초록▼
A methodology for producing modified nanoclays which, when added to an elastomer, provide elastomeric nanocomposites with improved ageing, rheological and mechanical properties, and which can be devoid of, or containing low amount of, a filler such as carbon black, is provided. The modified nanoclay
A methodology for producing modified nanoclays which, when added to an elastomer, provide elastomeric nanocomposites with improved ageing, rheological and mechanical properties, and which can be devoid of, or containing low amount of, a filler such as carbon black, is provided. The modified nanoclays are made of a nanoclay, such as an organomodified nanoclay, modified so as to be in association with an amine-containing antioxidant and optionally also with a silyl-containing compound, such as mercaptosiloxane. Also provided are processes of preparing the modified nanoclays, elastomeric composites containing same and articles containing the elastomeric composites.
대표청구항▼
1. A composition-of-matter comprising an organomodified nanoclay being in association with an amine-containing compound featuring anti-oxidation activity, said organomodified nanoclay being a nanoclay in association with a surface modifying agent, wherein said association with said amine-containing
1. A composition-of-matter comprising an organomodified nanoclay being in association with an amine-containing compound featuring anti-oxidation activity, said organomodified nanoclay being a nanoclay in association with a surface modifying agent, wherein said association with said amine-containing compound featuring anti-oxidation activity is effected by reacting said organomodified nanoclay with said amine-containing compound featuring anti-oxidation activity, in a solvent, at an elevated temperature, said solvent being selected from the group consisting of an organic solvent and a mixture of an organic solvent and water, wherein said surface modifying agent is an organic ammonium salt and said amine-containing compound featuring anti-oxidant activity is a para-phenylenediamine (p-PDA). 2. The composition-of-matter of claim 1, wherein said nanoclay is montmorillonite. 3. The composition-of-matter of claim 1, wherein said cationic surfactant is selected from the group consisting of a tallow ammonium salt and a tallow amminium salt. 4. The composition-of-matter of claim 1, wherein said organomodified nanoclay is organomodified montmorillonite. 5. The composition-of-matter of claim 4, wherein said organomodified nanoclay is selected from the group consisting of montmorillonite modified by dimethyl, benzyl, hydrogenated tallow, quaternary ammonium; montmorillonite modified by dimethyl, hydrogenated tallow, quaternary ammonium; montmorillonite modified by dimethyl, dihydrogenated tallow, quaternary ammonium; montmorillonite modified by dimethyl, 2-ethylhexyl, hydrogenated tallow, quaternary ammonium; and montmorillonite modified by methyl, bis(2-hydroxyethyl), hydrogenated tallow, quaternary ammonium. 6. The composition-of-matter of claim 4, wherein said organomodified nanoclay comprises montmorillonite modified by dimethyl, hydrogenated tallow, quaternary ammonium. 7. The composition-of-matter of claim 1, wherein said para-phenylene diamine compound is selected from the group consisting of a N,N-dialkyl-p-PDA and a N-alkyl-N-aryl-p-PDA. 8. The composition-of-matter of claim 1, further comprising a silyl-containing compound. 9. The composition-of-matter of claim 8, wherein the silyl-containing compound is a mercaptosilyl compound. 10. The composition-of-matter of claim 8, wherein said silyl-containing compound is a siloxane. 11. The composition-of-matter of claim 9, wherein said silyl-containing compound is a mercaptosiloxane. 12. The composition-of-matter of claim 1, further comprising silica. 13. The composition-of-matter of claim 1, further comprising an accelerator. 14. The composition-of-matter of claim 1, comprising a plurality of modified nanoclays. 15. A process of preparing the composition-of-matter of claim 1, the process comprising: reacting said organomodified nanoclay and said amine-containing compound featuring an anti-oxidation activity in a solvent at an elevated temperature, to thereby obtain said modified nanoclay, said organomodified nanoclay being a nanoclay in association with a surface modifying agent,thereby obtaining the composition-of-matter. 16. The process of claim 15, wherein said composition-of-matter further comprises a silyl-containing compound, the process, comprising reacting said organomodified nanoclay, said amine-containing compound and said silyl-containing compound, in said solvent, to thereby obtain the modified nanoclay. 17. The process of claim 16, comprising: reacting said organomodified nanoclay, said amine-containing compound in said solvent; andsubsequent to said reacting reacting the same with a silyl-containing compound in said solvent. 18. The process of claim 15, wherein aid composition-of-matter further comprises an accelerator, the process further comprising adding said accelerator, prior to or concomitant with, reacting said organomodified nanoclay and said amine-containing compound. 19. The process of claim 15, wherein said composition-of-matter further comprises silica, the process further comprising adding said silica, subsequent to reacting said organomodified nanoclay and said amine-containing compound. 20. The process of claim 15, wherein said solvent is selected from the group consisting of an organic solvent and a mixture of an organic solvent and water. 21. The process of claim 20, wherein said organic solvent is selected from the group consisting of acetone, isopropyl alcohol, chloroform and any combination thereof. 22. The process of claim 15, wherein said reacting comprises stirring at an elevated temperature. 23. The process of claim 15, further comprising drying the composition-of-matter. 24. An elastomeric composite comprising an elastomer and the composition-of-matter of claim 1. 25. The elastomeric composite of claim 24, wherein said elastomer is selected from the group consisting of an SBR elastomer, an isoprene elastomer, a polybutadiene elastomer, a butadiene acrylonitile elastomer, an EPDM elastomer, a natural rubber and any combination thereof. 26. The elastomeric composite of claim 24, being devoid of carbon black. 27. The elastomeric composite of claim 24, further comprising carbon black at a concentration lower than 20 phr. 28. An article-of-manufacturing, comprising the elastomeric composition of claim 24.
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