Patent SG-11201407968R-A (SG)
Title: Controlling melt fracture in bimodal resin pipe
Inventor: INN YONGWOO
IPC: G01N11/04
Filed: 2013-05-29
Abstract: (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 5 December 2013 (05.12.2013) WIPOIPCT (10) International Publication Number WO 2013/181274 A3 (51) International Patent Classification: G01N11/04 (2006.01) C08L 23/06 (2006.01) (21) International Application Number: (74) Agents: CARROLL, Rodney, B. et al.; Conley Rose, P.C., 5601 Granite Parkway, Suite 500, Piano, TX 75024 (US). (22) International Filing Date: (25) Filing Language: (26) Publication Language: (30) Priority Data: 61/654,018 13/660,747 13/660,750 13/660,777 31 May 2012 (31.05.2012) 25 October 2012 (25.10.2012) 25 October 2012 (25.10.2012) 25 October 2012 (25.10.2012) PCT/US2013/043154 (81) Designated States (unless otherwise indicated, for every kind of national protection available)'. AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. 29 May 2013 (29.05.2013) English English US US us us (71) Applicant: CHEVRON PHILLIPS CHEMICAL COM­ PANY LP [US/US]; 10001 Six Pines Drive, The Wood­ lands, TX 77380 (US). (72) Inventors: INN, Yongwoo; 217 Sagebrush Drive, Bartles- ville, OK 74006 (US). DESLAURIERS, Paul, J.; 6831 E 84 St N, Owasso, OK 74055 (US). YANG, Qing; 2917 Montrose Drive, Bartlesville, OK 74006 (US). SUKHADIA, Ashish, M.; 2550 Regency Road, Bartles­ ville, OK 74006 (US). ROHLFING, David, C.; 488 E. Fawn Ridge Trail, Bloomington, IN 47408 (US). MAE- GER, Pamela, L.; 2917 Versailles Place, Bartlesville, OK 74006 (US). (84) Designated States (unless otherwise indicated, for every kind of regional protection available)'. ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: — as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(H)) [Continued on next page] (54) Title: CONTROLLING MELT FRACTURE IN BIMODAL RESIN PIPE •t l> CJ i-H 00 i-H cn i-H o CJ O £ Log (Stress) O.lMPa O.lMPa Smooth Wavy / Matte Log (Shear Rate) FIG. IB (57) Abstract: A method of improving processing of polyethylene resins comprising obtaining a plurality of multimodal metallo- cene-catalyzed polyethylene samples measuring the shear stress as a function of shear rate for the plurality of multimodal metallo - cene-catalyzed polyethylene samples using capillary rheometry wherein the measuring yields values for a magnitude of slip-stick, a stress for smooth matte transition, to and a shear rate for smooth to matte transition; and identifying from the plurality of multimodal metallocene-catalyzed polyethylene samples individual multimodal metallocene-catalyzed polyethylene resins having a reduced tendency to melt fracture characterized by a magnitude of slip-stick greater than about 300 psi, a stress for smooth matte to transition greater than about 90 kPa, and a shear rate for smooth to matte transition greater than about 10 s\". 1 WO 2013/181274 A3 I lllll llllllll II llllll III lllll lllll III III III lllll lllll lllll lllll lllll llll lllllll llll llll llll — as to the applicant's entitlement to claim the priority of — before the expiration of the time limit for amending the the earlier application (Rule 4.17(Hi)) claims and to be republished in the event of receipt of Published: . . .. , , ./, . -,,/JU (88) Date of publication of the international search report: — with international search report (Art. 21(3)) amendments (Rule 48.2(h)) nternational sea 15 May 2014