Methods and apparatus for forming blends of polyolefin and resin modifier
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08J-003/00
C08L-023/12
B29C-047/38
B29C-047/60
B29C-047/10
B29C-047/08
C08L-023/04
C08L-023/10
B29C-047/36
B29K-105/16
B29C-047/00
B29K-105/00
B29C-047/76
B29C-047/82
B29C-047/62
B29K-105/06
B29L-007/00
출원번호
US-0822656
(2011-08-19)
등록번호
US-8853327
(2014-10-07)
국제출원번호
PCT/US2011/048386
(2011-08-19)
§371/§102 date
20130418
(20130418)
국제공개번호
WO2012/050661
(2012-04-19)
발명자
/ 주소
Keung, Jay K.
Devorest, Yann
Cheng, Chia Y.
출원인 / 주소
ExxonMobil Chemical Patents Inc.
인용정보
피인용 횟수 :
0인용 특허 :
5
초록
A process for preparing a blend of thermoplastic polymer and resin modifier within a single-screw extruder, wherein the resin modifier is a hydrocarbon resin.
대표청구항▼
1. A process for preparing a blend of thermoplastic polymer and resin modifier, the process comprising the steps of: (i) charging neat thermoplastic polymer to a single-screw extruder;(ii) charging neat resin modifier to the extruder;(iii) conveying the thermoplastic polymer and resin modifier throu
1. A process for preparing a blend of thermoplastic polymer and resin modifier, the process comprising the steps of: (i) charging neat thermoplastic polymer to a single-screw extruder;(ii) charging neat resin modifier to the extruder;(iii) conveying the thermoplastic polymer and resin modifier through a feed section of the extruder to form a blend, where the feed section has an average channel depth;(iv) conveying the blend through a compression section of the extruder to thereby form a molten blend;(v) mixing the molten blend after said step of conveying the blend through the compression section to thereby impart positive pressure on the molten blend in a downstream direction;(vi) conveying the molten blend through a metering section of the extruder, where the metering section has an average channel depth;(vii) extruding the molten blend, wherein the blend or molten blend is subjected to a compression ratio that is at least 1.2, where the compression ratio is the ratio of the feed section average channel depth to the metering section average channel depth; andwherein the resin modifier is an amorphous or substantially amorphous hydrocarbon resin. 2. The process of claim 1, where the blend includes a thermoplastic polymer to resin modifier weight ratio of 95:5 to 5:95. 3. The process of claim 1, where said step of extruding includes forming a film. 4. The process of claim 1, where said step of charging neat thermoplastic polymer includes charging thermoplastic polymer pellets comprising at least 95 wt % of the thermoplastic polymer, and where said step of charging neat resin modifier includes charging resin pellets comprising at least 95 wt % of the resin modifier. 5. The process of claim 1, where the thermoplastic polymer is a polyolefin selected from the group consisting of polypropylene and polyethylene. 6. The process of claim 1, where said step of charging thermoplastic polymer and said step of charging resin modifier includes gravimetrically feeding the thermoplastic polymer and resin modifier to the extruder. 7. The process of claim 1, where the feed section has a length ≧5 L/D. 8. The process of claim 1, where the feed section has a length ≧8 L/D. 9. The process of claim 1, where the feed section includes a channel characterized by a feed depth ratio of from 0.150 to about 0.300, and where said step of conveying the thermoplastic polymer and resin modifier through a feed section of the extruder includes conveying the blend through the channel. 10. The process of claim 1, where said step of conveying the thermoplastic polymer and resin modifier through a feed section of the extruder includes subjecting the blend to a temperature of at least 200° F. (93.3° C.). 11. The process of claim 1, where said step of conveying the blend through a compression section of the extruder includes subjecting the blend to a temperature of at least 300° F. (149° C.). 12. The process of claim 1, where said step of conveying the molten blend through a metering section of the extruder includes subjecting the blend to a temperature of at least 350° F. (177° C.). 13. The process of claim 1, where the compression section includes a first channel having a depth that increases from an upstream point to a downstream point and a second channel having a depth that decreases from the upstream point to the downstream point. 14. The process of claim 1, where the metering section has a length ≧4 L/D. 15. The process of claim 1, where the metering section includes a channel characterized by a metering depth ratio of from 0.01 to about 0.250, and where said step of conveying the thermoplastic polymer and resin modifier through the metering section of the extruder includes conveying the blend through the channel. 16. The process of claim 1, where the compression ratio is at least 1.5. 17. The process of claim 1, wherein the resin modifier is selected from the group consisting of petroleum resins, polyterpene resins, coal resins, rosins, and mixtures thereof. 18. The process of claim 1, wherein the resin modifier is selected from the group consisting of cycloaliphatic hydrocarbon resins, hydrogenated cycloaliphatic resins, aromatic modified cycloaliphatic hydrocarbon resins, and mixtures thereof. 19. The process of claim 1, wherein the resin modifier comprises a polypentadiene resin. 20. A process for preparing a blend of thermoplastic polymer and resin modifier, the process comprising the steps of: (i) charging neat polyolefin to a single-screw extruder;(ii) charging neat resin modifier to the extruder wherein the resin modifier is selected from the group consisting of hydrogenated cycloaliphatic resins, aromatic modified cycloaliphatic hydrocarbon resins, and mixtures thereof;(iii) conveying the polyolefin and resin modifier through a feed section of the extruder to form a blend, where the feed section has a feed depth;(iv) conveying the blend through a compression section of the extruder to thereby form a molten blend;(v) mixing the molten blend after said step of conveying the blend through the compression section to thereby impart positive pressure on the molten blend in a downstream direction;(vi) conveying the molten blend through a metering section, where the metering section has a metering depth; and(vii) extruding the molten blend, where during at least one of said step of conveying through a feed section, said step of conveying through a compression section, and said step of conveying through a metering section, the blend or molten blend is subjected to a pressure imparted by a compression ratio that is at least 1.2, where the compression ratio is the ratio of the feed depth to the metering depth. 21. A process for preparing a blend of thermoplastic polymer and resin modifier, the process comprising the steps of: (i) charging neat thermoplastic polymer to a single-screw extruder;(ii) charging neat resin modifier to the extruder wherein the resin modifier comprises a polycyclopentadiene resin;(iii) conveying the thermoplastic polymer and resin modifier through a feed section of the extruder to form a blend, where the feed section has a feed depth;(iv) conveying the blend through a compression section of the extruder to thereby form a molten blend;(v) mixing the molten blend after said step of conveying the blend through the compression section to thereby impart positive pressure on the molten blend in a downstream direction;(vi) conveying the molten blend through a metering section, where the metering section has metering depth; and(vii) extruding the molten blend, where during at least one of said step of conveying through a feed section, said step of conveying through a compression section, and said step of conveying through a metering section, the blend or molten blend is subjected to a pressure imparted by a compression ratio that is at least 1.2, where the compression ratio is the ratio of the feed depth to the metering depth.
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이 특허에 인용된 특허 (5)
Womer, Timothy W.; Buck, Effinger J.; Hudak, Jr., Bernard J., Apparatus for plasticating thermoplastics.
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