# US 10,246,582 B2 · Resin composition and resin molded article

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- Number: US 10,246,582 B2
- Document ID: US10246582B2
- Status: Granted
- Kind: B2
- Application number: 15/552,894
- Filed: 2016-03-03
- Published: 2018-02-01
- Granted: 2019-04-02
- Earliest claimed: 2015-03-06
- Assignees: Zeon Corporation
- Applicants: Zeon Corporation
- Inventors: Taichi Sawaguchi; Nozomi Yabuki
- Web page: https://patentgrep.com/patent/US10246582B2

## CPC

- C08L 45/00: Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers (of cyclic anhydrides or imides C08L35/00; of cyclic esters of polyfunctional acids C08L31/00)
- C08F 232/08: having condensed rings (coumarone-indene polymers C08F244/00)
- C08G 61/08: of carbocyclic compounds containing one or more carbon-to-carbon double bonds in the ring
- C08J 5/18: Manufacture of films or sheets
- C08L 53/02: of vinyl-aromatic monomers and conjugated dienes
- C08L 65/00: Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers
- C08F 4/65912: {in combination with an organoaluminium compound}
- C08G 2261/122: statistical
- C08G 2261/3324: derived from norbornene
- C08G 2261/418: Ring opening metathesis polymerisation [ROMP]
- C08L 2201/10: Transparent films; Clear coatings; Transparent materials
- C08L 2205/03: containing three or more polymers in a blend
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON 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)

## Abstract

The present invention is a resin composition comprising a cycloolefin resin and at least two hydrogenated styrene-based thermoplastic elastomers, wherein a content of the cycloolefin resin is 50 to 90 wt % based on a total amount of the cycloolefin resin and the hydrogenated styrene-based thermoplastic elastomers, and a melt volume rate of the resin composition at 260° C. is higher than that of the cycloolefin resin at 260° C., and a resin formed article. One aspect of the invention provides a resin composition that exhibits excellent transparency, impact resistance and melt fluidity, as well as a resin formed article obtained by forming this resin composition. The resin formed article of the present invention is preferably used as a drug container, a medical instrument or the like, since it exhibits excellent transparency and impact resistance.

## Claims

### Claim 1

A resin composition comprising a cycloolefin resin and at least two hydrogenated styrene-based thermoplastic elastomers,
wherein a content of the cycloolefin resin is 50 to 90 wt % based on a total amount of the cycloolefin resin and the hydrogenated styrene-based thermoplastic elastomers, and
a melt volume rate of the resin composition at 260° C. is higher than that of the cycloolefin resin at 260° C.

### Claim 2 (depends on 1)

The resin composition according to claim 1, wherein both weight average molecular weights of the hydrogenated styrene-based thermoplastic elastomers are 40,000 or less.

### Claim 3 (depends on 1)

The resin composition according to claim 1, wherein a difference (ΔnD) between a refractive index of the cycloolefin resin (nD1) and an average refractive index of the hydrogenated styrene-based thermoplastic elastomers (nD2) is more than −0.002 to less than +0.002.

### Claim 4 (depends on 1)

A resin formed article obtained by forming the resin composition according to claim 1.