# US 10,770,609 B2 · Multilayered polyolefin-based films having a layer comprising a crystalline block copolymer composite or a block copolymer composite resin

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- Number: US 10,770,609 B2
- Document ID: US10770609B2
- Status: Granted
- Kind: B2
- Application number: 16/205,472
- Filed: 2018-11-30
- Published: 2019-04-25
- Granted: 2020-09-08
- Earliest claimed: 2011-06-30
- Assignees: Dow Global Technologies LLC
- Applicants: Dow Gobal Technologies LLC
- Inventors: Jeffrey E. Bonekamp; Yushan Hu; Nichole E. Nickel; Lih-Long Chu; John A. Naumovitz; Mark G. Hofius
- Web page: https://patentgrep.com/patent/US10770609B2

## CPC

- H10F 19/85: Protective back sheets
- B29C 41/003: {characterised by the choice of material}
- B29C 41/26: by depositing flowable material on a rotating drum
- B29C 41/32: Making multilayered or multicoloured articles
- B32B 27/08: of synthetic resin
- B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)}
- B32B 37/185: {Laminating sheets, panels or inserts between two discrete plastic layers}
- C08L 53/00: Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- H10F 19/804: {Materials of encapsulations}
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2023/0625: {LLDPE, i.e. linear low density polyethylene}
- B29L 2009/00: Layered products
- B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers
- B32B 2323/04: Polyethylene
- B32B 2457/12: Photovoltaic modules
- C08L 2203/204: use in solar cells
- C08L 2205/025: containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2205/12: containing additives being liquid crystalline or anisotropic in the melt
- Y02E 10/50: Photovoltaic [PV] energy
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

Disclosed are multilayer film structures including a layer (B) that includes a crystalline block copolymer composite (CBC) or a specified block copolymer composite (BC), including i) an ethylene polymer (EP) including at least 80 mol % polymerized ethylene; ii) an alpha-olefin-based crystalline polymer (CAOP) and iii) a block copolymer including (a) an ethylene polymer block including at least 80 mol % polymerized ethylene and (b) a crystalline alpha-olefin block (CAOB); and a layer C that includes a polyolefin having at least one melting peak greater than 125 C, the top facial surface of layer C in adhering contact with the bottom facial surface of layer B. Such multilayer film structure preferably includes (A) a seal layer A having a bottom facial surface in adhering contact with the top facial surface of layer B. Such films are suited for use in electronic device (ED) modules including an electronic device such as a PV cell.

## Claims

### Claim 1

A multilayer film structure comprising: a tie Layer B and a bottom Layer C;
B. the tie layer B has a top facial surface and a bottom facial surface;
C. the bottom layer C comprises a propylene-based polymer having at least one melting peak greater than 125 C and has a top facial surface and a bottom facial surface, and the top facial surface of Layer C is in adhering contact with the bottom facial surface of Layer B;
wherein the Layer B consists of (1) a block composite resin (BC), (2) an optional colorant, (3) an optional stabilizer, and (4) an optional antioxidant, the BC made from monomers consisting of propylene and ethylene, and the BC has
i) an ethylene-propylene copolymer (EP) comprising at least 80 mol % polymerized ethylene;
ii) a crystalline propylene-based polymer (CPP); and
iii) a diblock copolymer comprising (a) an ethylene-propylene block comprising at least 80 mol % polymerized ethylene and (b) a crystalline propylene block.

### Claim 2 (depends on 1)

The multilayer film structure of claim 1 wherein the CPP comprises greater than 90 mol % polymerized propylene.

### Claim 3 (depends on 2)

The multilayer film structure of claim 2 wherein the block composite resin in Layer B has two peak melting temperatures and a first peak melting temperature greater than 120° C.

### Claim 4 (depends on 1)

The multilayer film structure of claim 1 wherein the crystalline propylene block (iii)(b) of the diblock copolymer is the same composition as the crystalline propylene-based polymer (CPP) of the block composite resin.

### Claim 5 (depends on 4)

The multilayer film structure of claim 4 wherein the ethylene-propylene block (iii)(a) of the diblock copolymer is the same composition as the EP copolymer of the block composite resin.

### Claim 6 (depends on 1)

The multilayer film structure of claim 1 wherein the Layer B block composite resin has an ethylene-propylene block amount in the range of from 30 to 70 weight % based on total weight of the diblock copolymer (iii).

### Claim 7 (depends on 1)

The multilayer film structure of claim 1 wherein the block composite resin has a crystalline block composite index (CBCI) from 0.3 to 0.8.

### Claim 8 (depends on 1)

The multilayer film structure of claim 1 wherein the tie Layer B is a blend with greater than 40 weight percent of the block composite resin.

### Claim 9 (depends on 1)

The multilayer film structure of claim 1 comprising:
(A) a seal layer A having a top facial surface and a bottom facial surface, the bottom facial surface of layer a in adhering contact with the top facial surface of layer B.

### Claim 10 (depends on 9)

The multilayer film structure of claim 9 wherein the layer A comprises a linear low density polyethylene (LLDPE).

### Claim 11 (depends on 10)

The multilayer film structure of claim 10 wherein the layer A comprises a blend formulation of a linear low density polyethylene (LLDPE) comprising a polar ethylene copolymer in an amount from 10 weight % to 45 weight %.

### Claim 12 (depends on 9)

The multilayer film structure of claim 9 wherein the layer A comprises a block composite resin and the layer A composition is different from the layer B composition.

### Claim 13 (depends on 9)

The multilayer film structure of claim 9 wherein Layer A is from greater than 0 to 200 micrometer (μm) in thickness; Layer B is from 25 to 100 μm in thickness; and Layer C is from 150 to 350 μm in thickness.

### Claim 14 (depends on 1)

The multilayer film structure of claim 1 wherein the block composite resin has a density from 0.905 g/cc to 0.912 g/cc.

### Claim 15 (depends on 1)

The multilayer film structure of claim 1 comprising
a top seal Layer A comprising a blend formulation of a linear low density polyethylene (LLDPE) comprising a polar ethylene copolymer in an amount from 10 weight % to 45 weight %;
the bottom Layer C comprising the propylene-based polymer; and
the Layer B between Layer A and Layer C, the block composite resin with
i) an ethylene-propylene copolymer (EP) comprising at least 93 mol % polymerized ethylene;
ii) the crystalline propylene-based polymer; and
iii) a diblock copolymer comprising (a) an ethylene-propylene block comprising at least 93 mol % polymerized ethylene and (b) a crystalline propylene block.

### Claim 16 (depends on 1)

An electronic device (ED) module comprising an electronic device and a multilayer film structure according to claim 1.

### Claim 17 (depends on 1)

The multilayer film structure of claim 1 wherein the Layer (B) consists of (1) the BC, (2) the colorant, (3) the stabilizer that is a UV stabilizer, and (4) the antioxidant.

### Claim 18 (depends on 1)

The multilayer film structure of claim 1 wherein the Layer (B) consists of (1) the BC, (2) the colorant, and (3) the stabilizer that is a UV stabilizer.

### Claim 19 (depends on 1)

The multilayer film structure of claim 1 wherein the Layer (B) consists of (1) the BC, and (2) the colorant.