Patent SG-11201906589T-A (SG)
Title: Degradable sheet material
Inventor: WALLIS CHRISTOPHER
IPC: B65D65/46
Filed: 2018-01-08
Abstract: 1 1-1 1-1 N O 1-1 00 O N C (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 26 July 2018 (26.07.2018) WIPO I PCT Iiiimmomiolollmonolommilmonwomovoimill (10) International Publication Number WO 2018/134071 Al (51) International Patent Classification: B65D 65/46 (2006.01) C08K 5/09 (2006.01) CO8K 3/26 (2006.01) C08K 5/101 (2006.01) C08K 5/00 (2006.01) (21) International Application Number: PCT/EP2018/050375 (22) International Filing Date: 08 January 2018 (08.01.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 17152496.0 20 January 2017 (20.01.2017) EP 17152497.8 20 January 2017 (20.01.2017) EP (71) Applicant: POLYMATERIA LIMITED [GB/GB]; First Floor, Thavies Inn House, 3-4 Holborn Circus, London Greater London EC1N 2HA (GB). (72) Inventors: WALLIS, Christopher; Polymateria Limited, First Floor, Thavies Inn House, 3-4 Holborn Circus, London Greater London EC1N 2HA (GB). CHAPMAN, Graham; Polymateria Limited, First Floor, Thavies Inn House, 3-4 Holborn Circus, London Greater London EC1N 2HA (GB). HILL, Gavin; Polymateria Limited, First Floor, Thavies Inn House, 3-4 Holborn Circus, London Greater London EC1N 2HA (GB). (74) Agent: BOULT WADE TENNANT; Verulam Gardens, 70 Gray's Inn Road, London Greater London WC1X 8BT (GB). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, (54) Title: DEGRADABLE SHEET MATERIAL FIG. 'I (57) : The present invention provides a sheet material formed of a degradeable composition, the composition comprising: 30 to 80 wt% calcium carbonate by weight of the composition; an additive; and the balance a polymer selected from polyethylene, polypropylene and copolymers and blends thereof, wherein the additive comprises, by combined weight of the additive and the polymer: (a) two or more transition metal compounds in a total amount of from 0.15 to 0.6 wt%; (b) a mono-or poly-unsaturated C14-C24 carboxylic acid, or an ester, anhydride or amide thereof, in an amount of from 0.04 to 0.08 wt%; (c) a synthetic rubber in an amount of from 0.04 to 0.2 wt%; and, optionally: (d) dry starch in an amount of from 0 to 20 wt%; and/or (e) calcium oxide in an amount of from 0 to 1 wt%; and/or (f) aphenolic antioxidant stabilizer in an amount of from 0 to 0.2 wt%; wherein the two or [Continued on next page] WO 2018/134071 Al MUNRO 11101 0101111111111110 10001111HO11111111101I111EH0I11IE AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, 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, SA, 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. (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, ST, 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). Published: — with international search report (Art. 21(3)) more transition metal compounds are selected from iron, manganese, copper, zinc, titanium, cobalt and cerium compounds and wherein the transition metals in the two or more transition metal compounds are different.