# US 2019/0375934 A1 · Compatibilised polyolefin and polyphenylene oxide and/or polystyrene composition

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- Number: US 2019/0375934 A1
- Document ID: US20190375934A1
- Status: Published application
- Kind: A1
- Application number: 16/463,182
- Filed: 2017-11-23
- Published: 2019-12-12
- Earliest claimed: 2016-11-24
- Assignees: Sabic Global Technologies B.V.
- Applicants: Sabic Global Technologies B.V.
- Inventors: Lidia Jasinska-Walc; Robert Duchateau; Katrien Veerle Bernaerts; Piotr Lorenc; Miloud Bouyahyi
- Web page: https://patentgrep.com/patent/US20190375934A1

## CPC

- C08L 71/12: Polyphenylene oxides
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08L 23/12: Polypropene
- C08L 51/006: {grafted on to block copolymers containing at least one sequence of polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds}
- C08L 53/02: of vinyl-aromatic monomers and conjugated dienes
- C08L 25/06: Polystyrene
- C08L 2203/20: use in electrical or conductive gadgets
- C08L 2205/03: containing three or more polymers in a blend
- C08L 2205/08: containing additives to improve the compatibility between two polymers
- C08L 2207/02: Heterophasic composition
- C08L 2207/062: HDPE
- C08L 2207/064: VLDPE
- C08L 2207/066: LDPE (radical process)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

The present invention relates to a composition comprising polyolefin, polyphenylene oxide (PPO) and a compatibiliser, articles made therefrom and the use of a graft or block copolymer as a compatibiliser.

## Claims

### Claim 1

A composition comprising a polyolefin, a polyphenylene oxide (PPO) and optionally polystyrene (PS) and a compatibiliser, wherein said compatibiliser is a block or graft copolymer comprising a polyolefin part and a polystyrene part, wherein the Mn of the polyolefin part is between 1 and 40 kg/mol and the Mn of the polystyrene part is between 4 and 16 kg/mol, wherein further the compatibiliser is present in an amount of between 2 to 20 wt. % of the total amount of the composition, wherein the polyolefin block of the compatibiliser is a propylene homopolymer block or a propylene copolymer block containing at least 90 wt. % of polypropylene, on the basis of the weight of the polypropylene block.

### Claim 2 (depends on 1)

The composition of claim 1, wherein the amount of polyolefin is from 5 to 95 wt. % on the basis of the total amount of polyolefin, PPO and optional PS, on the basis of the total amount of polyolefin, PPO and optional PS.

### Claim 3 (depends on 1)

The composition of claim 1, wherein the amount of compatibiliser is from 3-17 wt. %, on the basis of the total amount of the composition.

### Claim 4 (depends on 1)

The composition of claim 1, wherein a polyolefin is:
one or more of a propylene homopolymer,
one or more of a propylene—α-olefin random copolymer, preferably a propylene ethylene or a propylene C4-C8 α-olefin random copolymer,
one or more of a propylene—α-olefin block copolymer,
one or more of a hetero-phasic polypropylene copolymer comprising a matrix phase and a disperse phase, the matrix phase consisting of a propylene homopolymer and/or a propylene copolymer with up to 3 wt. % of ethylene and/or at least one C4-C8 α-olefin, the wt. % being based on the matrix phase, and the disperse phase consisting of an ethylene—C3-C8 α-olefin copolymer, and/or
a mixture of any of the foregoing polypropylenes.

### Claim 5 (depends on 1)

The composition of claim 1, wherein the polyolefin is a very low density polyethylene, linear low density polyethylene, low density polyethylene, high density polyethylene or a mixture of any of the foregoing polyethylenes.

### Claim 6 (depends on 1)

The composition of claim 1, wherein the compatibiliser has a number average molecular weight (Mn) from 3,000 to 90,000 g/mol.

### Claim 7 (depends on 1)

The composition of claim 1, wherein the polyolefin part of the compatibiliser has a number average molecular weight (Mn) between 1 and 20 kg/mol.

### Claim 8 (depends on 1)

The composition of claim 1, wherein the polystyrene part of the compatibiliser has a number average molecular weight (Mn) between 5 and 15 kg/mol.

### Claim 9 (depends on 1)

The composition of claim 1, wherein the amount of PPO and optional PS is from 95 to 5 wt. % on the basis of the total amount of polyolefin, PPO and optional PS.

### Claim 10 (depends on 1)

An article comprising the composition of claim 1.

### Claim 11 (depends on 10)

The article of claim 10, said article being selected from the group consisting of automotive parts, electronic devices, parts for electric plugs or contact, parts for batteries or battery cases, and parts for household appliances.

### Claim 12 (depends on 1)

The composition of claim 1, wherein said compatibiliser comprises a block or graft copolymer comprising a polyolefin block, and a polystyrene block, wherein the Mn of the polyolefin block is between 1 and 20 kg/mol and the Mn of the polystyrene block is between >5 and <15.

### Claim 13

A composition comprising a polyolefin, a polyphenylene oxide (PPO) and a compatibiliser, wherein said compatibiliser is a block or graft copolymer comprising a polyolefin block and a polystyrene block, wherein the Mn of the polyolefin block is between 1 and 40 kg/mol and the Mn of the polystyrene block is between 1 and 100 kg/mol, wherein further the compatibiliser is present in an amount of between 2 to 20 wt. % of the total amount of the composition.