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1. (WO2013159184) STABILIZED POLYETHYLENE
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2013/159184    International Application No.:    PCT/CA2013/000313
Publication Date: 31.10.2013 International Filing Date: 02.04.2013
IPC:
C08L 23/08 (2006.01), C08J 3/22 (2006.01), C08K 5/527 (2006.01), C08L 29/04 (2006.01)
Applicants: NOVA CHEMICALS (INTERNATIONAL) S.A. [CH/CH]; Avenue de la Gare 14 CH-1700 Fribourg (CH).
TIKUISIS, Tony [CA/CA]; (CA).
HO, Kam Wah [CA/CA]; (CA).
BORSE, Nitin [CA/CA]; (CA)
Inventors: TIKUISIS, Tony; (CA).
HO, Kam Wah; (CA).
BORSE, Nitin; (CA)
Agent: CHISHOLM, P., Scott; 2928-16 Street NE Calgary, Alberta T2E 7K7 (CA)
Priority Data:
2775294 24.04.2012 CA
Title (EN) STABILIZED POLYETHYLENE
(FR) POLYÉTHYLÈNE STABILISÉ
Abstract: front page image
(EN)Polyethylene is often stabilized with the combination of a primary antioxidant (such as a hindered phenol, a hydroxylamine or a lactone) and a secondary antioxidant (such as a phosphonite, a monophosphite, or a diphosphite). The diphosphite additives are not completely compatible with "linear" polyethylene. This results in "blooming" of the diphosphite to the surface of the finished polyethylene part or polyethylene film. The use of a preblend of ethylene vinyl alcohol (EVOH) and diphosphite mitigates this problem.
(FR)Le polyéthylène est souvent stabilisé à l'aide d'une combinaison d'un antioxydant primaire (tel qu'un phénol encombré, un hydroxylamine ou une lactone) et d'un antioxydant secondaire (tel qu'un phosphonite, un monophosphite, ou un diphosphite). Les additifs de type diphosphite ne sont pas complètement compatibles avec le polyéthylène "linéaire", ce qui provoque une "efflorescence" du diphosphite à la surface de la pièce en polyéthylène ou du film en polyéthylène fini(e). Pour atténuer ce problème, la présente invention utilise un prémélange d'éthylène-alcool vinylique (EVOH) et de diphosphite.
Designated States: 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, KM, 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.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (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)
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)