# US 8,785,554 B2 · Crystalline block composites as compatibilizers

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- Number: US 8,785,554 B2
- Document ID: US8785554B2
- Status: Granted
- Kind: B2
- Application number: 13/165,096
- Filed: 2011-06-21
- Published: 2011-12-22
- Granted: 2014-07-22
- Earliest claimed: 2010-06-21
- Assignees: Dow Global Technologies LLC
- Applicants: Colin Li Pi Shan; Kim L. Walton; Gary R. Marchand; Edmund M. Carnahan; Eddy I. Garcia-Meitin; Thomas Karjala
- Inventors: Colin Li Pi Shan; Kim L. Walton; Gary R. Marchand; Edmund M. Carnahan; Eddy I. Garcia-Meitin; Thomas Karjala
- Web page: https://patentgrep.com/patent/US8785554B2

## CPC

- C08L 23/10: Homopolymers or copolymers of propene
- C08L 23/06: Polyethylene
- C08L 23/142: {at least partially crystalline copolymers of propene with other olefins}
- C08L 23/20: having four to nine carbon atoms
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/035: containing four or more polymers in a blend
- C08L 2205/08: containing additives to improve the compatibility between two polymers
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Embodiments of the invention provide crystalline block composites and their use as compatibilizers. The crystalline block composites comprise i) a crystalline ethylene based polymer; ii) a crystalline alpha-olefin based polymer and iii) a block copolymer comprising a crystalline ethylene block and a crystalline alpha-olefin block.

## Claims

### Claim 1

A composition comprising:
A) a first crystalline alpha-olefin based polymer wherein the polymer is polypropylene;
B) a first crystalline ethylene based polymer wherein the polymer is polyethylene; and,
C) at least one crystalline block composite having a Crystalline Block Composite Index of 0.1 to 0.9 comprising:
i) a second crystalline ethylene based polymer;
ii) a second crystalline alpha-olefin based polymer wherein the polymer is polypropylene and
iii) a block copolymer comprising a crystalline ethylene block and a crystalline alpha-olefin block wherein the crystalline ethylene block of the block copolymer is the same composition as the crystalline ethylene based polymer in the block composite and the crystalline alpha-olefin block of the block copolymer is the same composition as the crystalline alpha-olefin based polymer of the block composite
wherein component C) is present in an amount of from 0.5 wt % to 15 wt % based on total weight of the composition.

### Claim 2 (depends on 1)

The composition of claim 1 wherein component B) is selected from the group consisting of HDPE, LDPE and LLDPE.

### Claim 3 (depends on 1)

The composition of claim 1 wherein component A) is present in an amount greater than 45 wt % based on total weight of the composition.

### Claim 4 (depends on 1)

The composition of claim 1 wherein the Izod Impact Strength measured at room temperature according to ASTM D256 is at least 5% greater than that of the composition with components A) and B) but lacking C).

### Claim 5 (depends on 4)

The composition of claim 4 wherein the average modulus measured according to ASTM D790 is no lower than 35% of the value for the composition with components A) and B) but lacking C).