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1. (WO2007001609) PREPARATION OF THERMOPLASTIC ELASTOMERS BY DYNAMIC VUCLANIZATION IN MULTI-SCREW EXTRUDERS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/001609 International Application No.: PCT/US2006/015757
Publication Date: 04.01.2007 International Filing Date: 24.04.2006
IPC:
B29C 47/40 (2006.01) ,C08L 23/16 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
29
WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
C
SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; AFTER- TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
47
Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
08
Component parts, details or accessories; Auxiliary operations
36
Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
38
using screws
40
using at least two intermeshing screws
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23
Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02
not modified by chemical after-treatment
16
Ethene-propene or ethene-propene-diene copolymers
Applicants:
ADVANCED ELASTOMER SYSTEMS, L.P. [US/US]; A LIMITED PARTNERSHIP ORGANIZED UNDER THE LAWS OF THE STATE OF DELAWARE 388 South Main Street Akron, Ohio 44311-1065, US (AllExceptUS)
NADELLA, Harry, P. [US/US]; US (UsOnly)
CHENG, Jianya [CA/US]; US (UsOnly)
DE YOUNG, Ronald [US/US]; US (UsOnly)
SHEN, Kuo-shein [US/US]; US (UsOnly)
Inventors:
NADELLA, Harry, P.; US
CHENG, Jianya; US
DE YOUNG, Ronald; US
SHEN, Kuo-shein; US
Agent:
FAULKNER, Kevin, M. ; ExxonMobil Chemical Company Law Technology P.O. Box 2149 Baytown, Texas 77522-2149, US
Priority Data:
11/167,33927.06.2005US
Title (EN) PREPARATION OF THERMOPLASTIC ELASTOMERS BY DYNAMIC VUCLANIZATION IN MULTI-SCREW EXTRUDERS
(FR) ÉLABORATION D’ÉLASTOMÈRES THERMOPLASTIQUES PAR VULCANISATION DYNAMIQUE DANS DES EXTRUDEUSES À VIS MULTIPLES
Abstract:
(EN) The invention relates to a method of preparing a thermoplastic vulcanizate comprising: a) melt processing a blend of thermoplastic polymer and vulcanizable elastomer in a multi-screw extruder (10A) having at least three intermeshing screws (14) , wherein said screws have 3-170 mixing zones, and said extruder having a L/D ratio of 15-100, and a screw profile that has 3 to 17 meshes per L/D,- b) adding at least one curing agent to the melt-processed blend of a) in at least one location in the first 46% of the length of said extruder, or adding at least one curing agent to the melt-processed blend of a) in a second extruder, so as to initiate curing of the blend: and, curing at least partially said elastomer by reactive melt processing. Improved processing, reaction kinetics and efficiencies are achieved, as well as thermoplastic vulcanizate products having decreased weight gain when placed in mineral oils.
(FR) L’invention concerne un procédé d’élaboration d’un produit vulcanisé thermoplastique comprenant les phases suivantes : a) traitement par fusion d’un mélange de polymère thermoplastique et d’élastomère vulcanisable dans une extrudeuse à vis multiples (10A) ayant au moins trois vis engrenées les unes dans les autres (14) , où lesdites vis possèdent de 3 à 170 zones de mélange ; et ladite extrudeuse ayant un rapport L/P de 15 à 100, et un profil de vis de 3 à 17 mailles par L/P, - b) addition d’au moins un agent de vulcanisation au mélange traité par fusion de a) dans au moins un point des premiers 46% de la longueur de ladite extrudeuse, ou bien addition d’au moins un agent de vulcanisation au mélange traité par fusion de a) dans une seconde extrudeuse, pour démarrer la vulcanisation du mélange ; et vulcanisation au moins partielle dudit élastomère par traitement par fusion réactive. On améliore ainsi les cinétiques et les efficacités de traitement et de réaction, tout en obtenant des produits vulcanisés thermoplastiques dont le gain pondéral est réduit une fois ajoutés à des huiles minérales.
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Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP1899138JP2008546575