# US 2019/0375864 A1 · Articles Having Improved Clarity, Prepared from Propylene-Ethylene Copolymers

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0375864 A1
- Document ID: US20190375864A1
- Status: Published application
- Kind: A1
- Application number: 16/547,347
- Filed: 2019-08-21
- Published: 2019-12-12
- Earliest claimed: 2004-12-15
- Assignees: Fina Technology, Inc.
- Applicants: Fina Technology, Inc.
- Inventors: Douglas Burmaster; Owen Hodges; J. Layne Lumus; Lu Ann Kelly; Mark Murphy
- Web page: https://patentgrep.com/patent/US20190375864A1

## CPC

- C08F 210/06: Propene
- C08F 210/16: Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
- C08J 5/00: Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00)
- C08J 2323/16: Ethene-propene or ethene-propene-diene copolymers
- C08L 23/142: {at least partially crystalline copolymers of propene with other olefins}
- Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic]
- Y10T 428/1397: Single layer [continuous layer]
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Molded articles are prepared from propylene-ethylene copolymers and exhibiting improved clarity and strength properties. Articles prepared include bottles and other thin-walled articles. The articles are prepared using an isotactic propylene-ethylene random copolymer resin having an ethylene content of from about 0.5 to about 3 percent by total weight of copolymer, with a xylene solubles content of less than about 1.5 percent. The injection molded article may exhibit less than about 20 percent haze, as determined by ASTM D1003, at a thickness of about 0.08 inch (2.03 mm). Articles may also be prepared from similar copolymers having an ethylene content greater than about 3 percent by total weight of copolymer, with a xylene solubles content of less than about 4 percent by total weight of copolymer. These articles may exhibit less than about 13 percent haze, as determined by ASTM D1003, at a thickness of about 0.08 inch (2.03 mm).

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A process comprising:
supplying an isotactic propylene-ethylene random copolymer resin having an ethylene content of greater than about 3 percent by total weight of the copolymer, a melt flow rate of from about 0.1 g/10 min to about 150 g/10 min as determined by ASTM D-1238, Procedure B, and a xylene solubles content of less than about 4 percent by total weight of the copolymer; and
injection molding the isotactic propylene-ethylene random copolymer resin to form an injection molded article, wherein the injection molded article exhibits a haze of less than about 13 percent, as determined by ASTM 01003, at a thickness of about 0.08 inch (2.03 mm).

### Claim 22 (depends on 21)

The process of claim 21, wherein the isotactic propylene-ethylene random copolymer resin has an ethylene content of from about 3 to about 5 percent by total weight of the copolymer.

### Claim 23 (depends on 21)

The process of claim 21, wherein the isotactic propylene-ethylene random copolymer resin has a xylene solubles content of from about 2 to about 3 percent by total weight of the copolymer.

### Claim 24 (depends on 21)

The process of claim 21, wherein the isotactic propylene-ethylene random copolymer resin has a melt flow rate of less than about 20 as determined by ASTM D-1238, Procedure B, and wherein the injection molded article exhibits a haze of less than about 10 percent, as determined by ASTM 01003, at a thickness of about 0.08 inch (2.03 mm).

### Claim 25 (depends on 24)

The process of claim 24, wherein the isotactic propylene-ethylene random copolymer resin has a melt flow rate of from about 7 to about 15 as determined by ASTM D-1238, Procedure B.

### Claim 26 (depends on 21)

The process of claim 21, wherein the isotactic propylene-ethylene random copolymer resin has a melt flow rate of greater than about 20 g/10 min, as determined by ASTM D-1238, Procedure B.

### Claim 27 (depends on 26)

The process of claim 26, wherein the injection molded article exhibits a flexural modulus of less than about 2.25×105 psi (1551 mPa), as determined by ASTM 0790-97.