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1. (WO2003078517) COMPOSITIONS BASED ON EXPANDABLE VINYLAROMATIC POLYMERS WITH AN IMPROVED EXPANDABILITY
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/2003/078517    International Application No.:    PCT/EP2003/002274
Publication Date: 25.09.2003 International Filing Date: 06.03.2003
IPC:
C08J 9/00 (2006.01), C08J 9/16 (2006.01), C08L 25/04 (2006.01), C08L 25/06 (2006.01), C08L 25/08 (2006.01), C08L 71/12 (2006.01)
Applicants: POLIMERI EUROPA S.P.A. [IT/IT]; Via E. Fermi, 4, I-72100 Brindisi (IT) (For All Designated States Except US).
CASALINI, Alessandro [IT/IT]; (IT) (For US Only).
LONGO, Aldo [IT/IT]; (IT) (For US Only).
GHIDONI, Dario [IT/IT]; (IT) (For US Only).
LANFREDI, Roberto [IT/IT]; (IT) (For US Only)
Inventors: CASALINI, Alessandro; (IT).
LONGO, Aldo; (IT).
GHIDONI, Dario; (IT).
LANFREDI, Roberto; (IT)
Agent: DE GREGORI, Antonella; Ing. Barzanó & Zanardo Milano S.p.A., Via Borgonuovo, 10, I-20121 Milan (IT)
Priority Data:
MI2002A000584 20.03.2002 IT
Title (EN) COMPOSITIONS BASED ON EXPANDABLE VINYLAROMATIC POLYMERS WITH AN IMPROVED EXPANDABILITY
(FR) COMPOSITIONS A BASE DE POLYMERES VINYL-AROMATIQUES SUSCEPTIBLES D'EXPANSION, A COEFFICIENT D'EXPANSION AMELIORE
Abstract: front page image
(EN)Compositions of expandable vinylaromatic polymers which contain a polymer, of at least one vinylaromatic monomer, having an average molecular weight Mw ranging from 50,000 to 170,000, which comprise: a) 0-50% by weight of a copolymer obtained by polymerizing one or more vinylaromatic monomers and 0.1-15% by weight of an &agr;-alkylstyrene; b) 0-10% by weight of a compatible polymer having a crystallinity lower than 10% and a glass transition temperature (Tg) higher than 100°C, the remaining percentage consisting of the vinylaromatic polymer; c) 2-10% by weight, calculated with respect to the total, of an expanding agent; with the proviso that at least one of (a) or (b) is present in the polymeric mixture.
(FR)Cette invention a trait à des compositions à base de polymères vinyl-aromatiques, contenant un polymère, issu d'au moins un monomère vinyl-aromatique, dont le poids moléculaire moyen (Mw) est compris entre 50 000 et 170 000. Ces compositions contiennent, en pourcentage pondéral, (a), de 0 à 50 % d'un copolymère obtenu par polymérisation d'un ou de plusieurs monomères vinyl-aromatiques et de 1 à 15 % d'un alkylstyrène-A, (b), de 0 à 10 % d'un polymère compatible dont la cristallinité est inférieure à 100 % et dont la température de transition vitreuse (Tg) est supérieure à 100 °C, le pourcentage restant étant constitué du polymère vinyl-aromatique et, (c), de 2 à 10 %, pourcentage calculé par rapport au pourcentage total, d'un agent d'expansion, à la condition qu'au moins la substance (a) ou (b) soit présente dans le mélange polymère.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NI, NO, NZ, OM, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (GH, GM, KE, LS, MW, MZ, 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, IT, LU, MC, NL, 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)