US 11,746,222 B2
Polymer blends for use in multilayer structure and multilayer structures comprising the same
Carmelo Declet Perez, Pearland, TX (US); Brian W. Walther, Lake Jackson, TX (US); James L. Cooper, Brazoria, TX (US); and Hayley A. Brown, Houston, TX (US)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 16/340,982
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Nov. 17, 2017, PCT No. PCT/US2017/062282
§ 371(c)(1), (2) Date Apr. 10, 2019,
PCT Pub. No. WO2018/094199, PCT Pub. Date May 24, 2018.
Claims priority of provisional application 62/424,117, filed on Nov. 18, 2016.
Prior Publication US 2019/0292358 A1, Sep. 26, 2019
Int. Cl. C08L 23/08 (2006.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 15/085 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); C08L 23/06 (2006.01); C08L 23/04 (2006.01)
CPC C08L 23/0869 (2013.01) [B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 7/12 (2013.01); B32B 15/085 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); C08L 23/04 (2013.01); C08L 23/06 (2013.01); B32B 2305/28 (2013.01); C08L 2203/16 (2013.01); C08L 2205/02 (2013.01); C08L 2207/066 (2013.01)] 11 Claims
 
1. A polymer blend for a multilayer structure comprising:
a copolymer comprising ethylene and at least one of methyl acrylate and ethyl acrylate having an acrylate content of 5 to 40 weight percent based on the weight of the copolymer and having a melt index (I2) of 5 to 60 g/10 minutes, wherein the total amount of ethylene methyl acrylate copolymer and ethylene ethyl acrylate copolymer comprises 45 to 99 weight percent of the blend based on the total weight of the blend; and
a polyethylene having a density of 0.870 g/cm3 or more and having a melt index (I2) of 20 g/10 minutes or less, wherein the polyethylene comprises 1 to 55 weight percent of the blend based on the total weight of the blend, wherein the relative viscosity ratio of the polyethylene to the copolymer comprising ethylene and at least one of methyl acrylate and ethyl acrylate is <0.35 and wherein the blend is adapted to be extrusion coated on a substrate at a temperature of 296° C. to 319° C.