US 12,065,559 B2
Polymeric compositions for footwear
Giancarlos Delevati, São Paulo (BR)
Assigned to Braskem S.A., Camaçari (BR)
Appl. No. 16/769,968
Filed by Braskem S.A., Camaçari (BR)
PCT Filed Dec. 4, 2018, PCT No. PCT/IB2018/001373
§ 371(c)(1), (2) Date Jun. 4, 2020,
PCT Pub. No. WO2019/111047, PCT Pub. Date Jun. 13, 2019.
Claims priority of provisional application 62/594,307, filed on Dec. 4, 2017.
Prior Publication US 2020/0407539 A1, Dec. 31, 2020
Int. Cl. C08J 9/00 (2006.01); C08J 9/10 (2006.01); C08K 3/22 (2006.01); C08K 3/26 (2006.01); C08K 5/103 (2006.01); C08K 5/14 (2006.01); C08K 5/23 (2006.01); C08L 23/08 (2006.01); C08L 83/04 (2006.01)
CPC C08L 23/0853 (2013.01) [C08J 9/0061 (2013.01); C08J 9/0066 (2013.01); C08J 9/103 (2013.01); C08K 3/22 (2013.01); C08K 3/26 (2013.01); C08K 5/103 (2013.01); C08K 5/14 (2013.01); C08K 5/23 (2013.01); C08L 23/0815 (2013.01); C08J 2207/00 (2013.01); C08J 2323/08 (2013.01); C08J 2483/04 (2013.01); C08K 2003/2296 (2013.01); C08K 2003/265 (2013.01); C08L 83/04 (2013.01)] 18 Claims
 
1. An expanded polymer composition for footwear, the expanded polymer composition being prepared from a polymer composition, the polymer composition comprising:
an elastomeric ethylene-vinyl acetate (EVA) composition;
a blowing agent; and
optionally one or more selected from a group consisting of a base polymer, filler, peroxide agent, and blowing accelerator,
wherein the elastomeric EVA composition has a melt flow index (MFI) at 190° C. and 2.16 kg as determined according to ASTM D1238 in the range of 6.1 g/10 min and 45 g/10 min,
wherein the elastomeric EVA composition comprises:
(A) an EVA copolymer at a percent by weight in the range of 20 wt % to 90 wt %;
(B) an ethylene alpha-olefin copolymer at a percent by weight in the range of 5% to 60%;
(C) a polyorganosiloxane at a percent by weight in the range of 0.1 wt % to 10 wt %; and
(D) a plasticizer at a percent by weight in the range of 0.5 wt % to 20 wt %; and
(E) a rubber at a percent by weight in the range of 0.5 wt % to 40 wt %,
wherein the expanded polymer composition exhibits a density as determined by ASTM D-792 within a range of 0.25 g/cm3 to 1.0 g/cm3.