# US 11,306,194 B2 · Nucleating agent, polyolefin-based resin composition containing same, and molded article thereof

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- Number: US 11,306,194 B2
- Document ID: US11306194B2
- Status: Granted
- Kind: B2
- Application number: 16/969,404
- Filed: 2019-02-04
- Published: 2021-02-18
- Granted: 2022-04-19
- Earliest claimed: 2018-02-13
- Assignees: Adeka Corporation
- Applicants: Adeka Corporation
- Inventors: Takuya Fukuda; Hiroaki Mizushima; Yuri Yokota
- Web page: https://patentgrep.com/patent/US11306194B2

## CPC

- C08K 5/0083: {Nucleating agents promoting the crystallisation of the polymer matrix}
- C07F 9/65744: {condensed with carbocyclic or heterocyclic rings or ring systems}
- C08K 5/527: Cyclic esters
- C08L 23/12: Polypropene
- C08L 2205/24: Crystallisation aids
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

Provided are: a nucleating agent capable of simultaneously improving the thermal stability and the transparency of a polyolefin resin; a polyolefin-based resin composition containing the same; and a molded article of the composition. The nucleating agent contains a compound represented by Formula (1) below where R1 to R4 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 9 carbon atoms; R5 represents an alkanediyl group having 1 to 4 carbon atoms; and M represents a hydrogen atom or a sodium atom. In this nucleating agent, the mass ratio of phosphorus atoms and sodium atoms, P/Na, is in a range of 1.200 to 1.500.

## Claims

### Claim 1

A polyolefin resin composition, comprising a nucleating agent in an amount of 0.001 to 10 parts by mass with respect to 100 parts by mass of a polyolefin resin, the nucleating agent, comprising:
a compound represented by the following Formula (1):
wherein in Formula (1), R1 to R4 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 9 carbon atoms; R5 represents an alkanediyl group having 1 to 4 carbon atoms; and M represents a sodium atom,
and a compound represented by the following Formula (1′):
wherein in Formula (1′), R1 to R4 each independently represent a hydrogen atom or a linear or branched alkyl group having 1 to 9 carbon atoms; R5 represents an alkanediyl group having 1 to 4 carbon atoms; and M represents a hydrogen atom,
wherein a mass ratio of phosphorus atoms and sodium atoms in the nucleating agent, P/Na, is in a range of 1.350 to 1.500.

### Claim 2 (depends on 1)

The polyolefin resin composition according to claim 1, wherein the mass ratio of phosphorus atoms and sodium atoms in the nucleating agent, P/Na, is in a range of 1.350 to 1.450.

### Claim 3 (depends on 1)

The polyolefin resin composition according to claim 1, wherein the polyolefin resin is at least one selected from the group consisting of a polypropylene and an ethylene-propylene block or random copolymer.

### Claim 4 (depends on 1)

A molded article obtained by molding the polyolefin resin composition according to claim 1.