Cellulose esters in highly-filled elastomeric systems
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-001/12
C08L-001/10
C08J-003/20
C08K-013/08
C08L-001/14
출원번호
US-0690909
(2012-11-30)
등록번호
US-9708472
(2017-07-18)
발명자
/ 주소
Basu, Soumendra Kumar
Helmer, Bradley James
출원인 / 주소
Eastman Chemical Company
대리인 / 주소
Owen, Polly C.
인용정보
피인용 횟수 :
0인용 특허 :
276
초록▼
An elastomeric composition is provided comprising at least one non-fibril cellulose ester, at least one non-nitrile primary elastomer, optionally a starch, and at least 70 parts per hundred rubber (phr) of one or more fillers, wherein the weight ratio of the cellulose ester to the starch is at least
An elastomeric composition is provided comprising at least one non-fibril cellulose ester, at least one non-nitrile primary elastomer, optionally a starch, and at least 70 parts per hundred rubber (phr) of one or more fillers, wherein the weight ratio of the cellulose ester to the starch is at least 3:1, wherein the cellulose ester is in the form of particles having an average diameter of not more than 10 μm.
대표청구항▼
1. An elastomeric composition comprising at least one non-fibril cellulose ester, at least one non-nitrile primary elastomer, and at least 70 parts per hundred rubber (phr) of one or more fillers, wherein a starch is absent from said elastomeric composition; and wherein at least a portion of said at
1. An elastomeric composition comprising at least one non-fibril cellulose ester, at least one non-nitrile primary elastomer, and at least 70 parts per hundred rubber (phr) of one or more fillers, wherein a starch is absent from said elastomeric composition; and wherein at least a portion of said at least one non-fibril cellulose ester is dispersed in said at least one non-nitrile primary elastomer, wherein said at least one non-nitrile primary elastomer forms a continuous phase and at least a portion of said at least one non-fibril cellulose ester forms a dispersed phase; and wherein said elastomeric composition exhibits a molded groove tear as measured according to ASTM D624 of at least 130 lbf/in. 2. The elastomeric composition according to claim 1 wherein said elastomeric composition comprises at least 1 and not more than 75 phr of said at least one non-fibril cellulose ester. 3. The elastomeric composition according to claim 1 wherein said elastomeric composition comprises at least 75 phr and/or not more than 150 phr of said one or more fillers. 4. The elastomeric composition according to claim 1 wherein said elastomeric composition comprises at least 85 phr and/or not more than 130 phr of said one or more fillers. 5. The elastomeric composition according to claim 1 wherein said one or more fillers comprise silica, carbon black, clay, alumina, talc, mica, discontinuous fibers including cellulose fibers and glass fibers, aluminum silicate, aluminum trihydrate, barites, feldspar, nepheline, antimony oxide, calcium carbonate, kaolin, and combinations thereof. 6. The elastomeric composition according to claim 1 wherein said at least one non-fibril cellulose ester is in the form of particles having an average diameter of not more than 10 μm, wherein at least 75 percent of said particles have an aspect ratio of not more than 2:1. 7. The elastomeric composition according to claim 1 wherein said at least one non-fibril cellulose ester is in the form of particles having an average diameter of not more than 10 μm, wherein at least 75 percent of said particles have a particle size of not more than 8 μm. 8. The elastomeric composition according to claim 1 wherein said elastomeric composition exhibits a Mooney viscosity at 100° C. as measured according to ASTM D 1646 of not more than 110 AU when uncured. 9. The elastomeric composition according to claim 1 wherein said elastomeric composition exhibits a Mooney viscosity at 100° C. as measured according to ASTM D 1646 of not more than 90 AU when uncured. 10. The elastomeric composition according to claim 1 wherein said elastomeric composition exhibits a DMA strain sweep modulus as measured at 5% strain and 30° C. of at least 1,400,000 Pa. 11. The elastomeric composition according to claim 1 wherein said at least one non-fibril cellulose ester is selected from the group consisting of cellulose acetate, cellulose acetate propionate, cellulose acetate butyrate, cellulose triacetate, cellulose tripropionate, cellulose tributyrate, and mixtures thereof. 12. The elastomeric composition according to claim 1 wherein said at least one non-nitrile primary elastomer is non-polar. 13. The elastomeric composition according to claim 1 wherein said at least one non-nitrile primary elastomer is selected from the group consisting of natural rubber, polybutadiene, polyisoprene, styrene-butadiene rubber, polyolefins, ethylene propylene diene monomer (EPDM), polynorbornene, and combinations thereof. 14. The elastomeric composition according to claim 1 wherein said at least one non-fibril cellulose ester is a modified cellulose ester that has been modified by at least one plasticizer. 15. The elastomeric composition according to claim 14 wherein said at least one plasticizer forms at least 1 and not more than 60 weight percent of said modified cellulose ester. 16. The elastomeric composition according to claim 14 wherein said at least one plasticizer is one selected from the group consisting of a phosphate plasticizer, benzoate plasticizer, adipate plasticizer, a phthalate plasticizer, a glycolic acid ester, a citric acid ester plasticizer, and a hydroxyl-functional plasticizer. 17. The elastomeric composition according to claim 14 wherein said at least one plasticizer is selected from at least one of the following: triphenyl phosphate, tricresyl phosphate, cresyldiphenyl phosphate, octyldiphenyl phosphate, diphenylbiphenyl phosphate, trioctyl phosphate, tributyl phosphate, diethyl phthalate, dimethoxyethyl phthalate, dimethyl phthalate, dioctyl phthalate, dibutyl phthalate, di-2-ethylhexyl phthalate, butylbenzyl phthalate, dibenzyl phthalate, butyl phthalyl butyl glycolate, ethyl phthalyl ethyl glycolate, methyl phthalyl ethyl glycolate, triethyl citrate, tri-n-butyl citrate, acetyltriethyl citrate, acetyl-tri-n-butyl citrate, and acetyl-tri-n-(2-ethylhexyl) citrate. 18. An article comprising said elastomeric composition of claim 1. 19. The article according to claim 18 wherein said article comprises a tire.
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이 특허에 인용된 특허 (276)
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