# US 2019/0169367 A1 · Semi-crystalline thermoplastic polyester for producing an aerosol container

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

- Number: US 2019/0169367 A1
- Document ID: US20190169367A1
- Status: Published application
- Kind: A1
- Application number: 16/321,343
- Filed: 2017-08-02
- Published: 2019-06-06
- Earliest claimed: 2016-08-02
- Assignees: Roquette Freres
- Applicants: Roquette Freres
- Inventors: Hélène AMEDRO; René SAINT-LOUP
- Web page: https://patentgrep.com/patent/US20190169367A1

## CPC

- C08G 63/672: Dicarboxylic acids and dihydroxy compounds
- B29C 49/0006: {for heating or cooling}
- B29C 49/06: Injection blow-moulding
- B29C 49/12: Stretching rods
- B29C 2049/023: {using inherent heat of the preform, i.e. 1 step blow moulding}
- B29K 2067/00: Use of polyesters {or derivatives thereof}, as moulding material
- B29L 2031/7142: {Aerosol containers}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- 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)
- 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

## Abstract

Use of a semi-crystalline thermoplastic polyester for producing an aerosol container, said polyester having at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A), and at least one terephthalic acid unit (C), wherein the molar ratio (A)/[(A)+(B)] is at least 0.05 and at most 0.30, said polyester being free of non-cyclic aliphatic diol units or comprising a molar amount of non-cyclic aliphatic diol units, relative to the totality of monomeric units in the polyester, of less than 5%, and with a reduced viscosity in solution (25° C.; phenol (50 wt. %): ortho-dichlorobenzene (50 wt. %); 5 g/L of polyester) greater than 70 mL/g.

## Claims

### Claim at position 1

1-19. (canceled)

### Claim 20

An aerosol container, comprising a semicrystalline thermoplastic polyester comprising:
at least one 1,4:3,6-dianhydrohexitol unit (A);
at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A); and
at least one terephthalic acid unit (C);
wherein the (A)/[(A)+(B)] molar ratio is at least 0.05 and at most 0.30;
said polyester not containing any aliphatic non-cyclic diol units or comprising a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 5%, and the reduced solution viscosity (25° C.; phenol (50% m): ortho-dichlorobenzene (50% m); 5 g/l of polyester) of said polyester being greater than 70 ml/g.

### Claim 21 (depends on 20)

The aerosol container according to claim 20, wherein the alicyclic diol (B) is a diol chosen from 1,4-cyclohexanedimethanol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol or a mixture of these diols, very preferentially 1,4-cyclohexanedimethanol.

### Claim 22 (depends on 20)

The aerosol container according to claim 20, wherein the 1,4:3,6-dianhydrohexitol (A) is isosorbide.

### Claim 23 (depends on 20)

The aerosol container according to claim 20, wherein the polyester does not contain any aliphatic non-cyclic diol units, or comprises a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 1%.

### Claim 24 (depends on 20)

The aerosol container according to claim 20, wherein the (3,6-dianhydrohexitol unit (A)+alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A))/(terephthalic acid unit (C)) molar ratio is from 1.05 to 1.5.

### Claim 25 (depends on 20)

The aerosol container according to claim 20, wherein the aerosol container comprises one or more additional polymers and/or one or more additives.

### Claim 26

A method for the production of an aerosol container, said method comprising the following steps:
provision of a semicrystalline thermoplastic polyester comprising at least one 1,4:3,6-dianhydrohexitol unit (A), at least one alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A), at least one terephthalic acid unit (C), wherein the (A)/[(A)+(B)] molar ratio is at least 0.05 and at most 0.30, said polyester not containing any aliphatic non-cyclic diol units or comprising a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 5%, and the reduced solution viscosity (25° C.; phenol (50% m):ortho-dichlorobenzene (50% m); 5 g/l of polyester) of said polyester being greater than 70 ml/g; and
preparation of said aerosol container from the semicrystalline thermoplastic polyester obtained in the preceding step.

### Claim 27 (depends on 26)

The method according to claim 26, wherein the preparation is carried out by the injection stretch blow molding method.

### Claim 28 (depends on 26)

The method according to claim 26, wherein the alicyclic diol (B) is a diol chosen from 1,4-cyclohexanedimethanol, 1,2-cyclohexanedimethanol, 1,3-cyclohexanedimethanol or a mixture of these diols, very preferentially 1,4-cyclohexanedimethanol.

### Claim 29 (depends on 26)

The method according to claim 26, wherein the 1,4:3,6-dianhydrohexitol (A) is isosorbide.

### Claim 30 (depends on 26)

The method according to claim 26, wherein the polyester does not contain any aliphatic non-cyclic diol units, or comprises a molar amount of aliphatic non-cyclic diol units, relative to all the monomer units of the polyester, of less than 1%.

### Claim 31 (depends on 26)

The method according to claim 26, wherein the (3,6-dianhydrohexitol unit (A)+alicyclic diol unit (B) other than the 1,4:3,6-dianhydrohexitol units (A))/(terephthalic acid unit (C)) molar ratio is from 1.05 to 1.5.

### Claim 32 (depends on 26)

The method according to claim 26, wherein the aerosol container comprises one or more additional polymers and/or one or more additives.