What technology area does this patent fall under?

Primary CPC classification C08L23/12. Mapped technology areas include Chemistry & Metallurgy.

When was this patent published?

Publication date Tue Apr 05 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.

What related patents are in patentsdb?

We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).

Propylene resin material and method for the production thereof

Patent metadata
Field	Value
Publication number	US-9303112-B2
Application number	US-201314028768-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Sep 24, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

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Title
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Abstract
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Assignees and inventors
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Key dates
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First independent claim
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CPC / IPC classifications
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Citations and related patents
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Abstract

Official abstract text for this publication.

Disclosed are a propylene resin material capable of affording a molded article superior in impact properties, tensile properties, and appearance, and a method for producing the same. The propylene resin material includes a propylene homopolymer portion and a propylene-ethylene copolymer portion and satisfies specific requirements. The production method includes the step of mixing an organic peroxide with a propylene polymeric material produced via a multistage polymerization process using a polymerization catalyst and comprising a propylene homopolymer portion and a propylene-ethylene copolymer portion, the step of heating the mixture obtained via the mixing step, at a temperature lower than a decomposition temperature of the organic peroxide at which the half-life of the organic peroxide is one minute, and the step of washing the mixture heated in the heating step, with a medium containing an organic solvent.

First claim

Opening claim text (preview).

What is claimed is: 1. A propylene resin material comprising a propylene homopolymer portion (I) and a propylene-ethylene copolymer portion (II), wherein the propylene resin material satisfies the following requirements (1), (2), (3), and (4): requirement (1): the copolymer portion (II) comprises constitutional units derived from propylene and constitutional units derived from ethylene, wherein the content of the constitutional units derived from ethylene is 20 to 70% by weight where the overall weight of the copolymer portion (II) is taken as 100% by weight; requirement (2): the value of EPcxis calculated from a formula: EPcxis =(C2′CXIS/C2′CXS) x100 is 100 or more where the content of the constitutional units derived from ethylene contained in the components soluble in xylene at 20° C. of the propylene resin material is represented by C2′CXS, the components soluble in xylene at 20° C. are collectively named CXS, the content of the constitutional units derived from ethylene contained in the components insoluble in xylene at 20° C. of the propylene resin material is represented by C2′CXIS, the components insoluble in xylene at 20° C. are collectively named CXIS; requirement (3): the arithmetic mean (ΔEP) of the polypropylene resin material determined by the following procedures (1) through (5) is 20% or less; (1) the contents of five types of triads PPE CXS , EPE cxs , PEP cxs , PEE CXS , and EEE CXS contained in the CXS, and the contents of five types of triads PPE CXIS , EPE CXIS , PEPcms, PEE CXIS , and EEE CXIS contained in the CXIS are measured using 13 C-NMR; (2) the ratios, PPE EP CXS , EPE EP CXS , PEP EP CXS , PEE EP CXS , and EEE EP CXS , of the respective five types of triads contained in the CXS to the sum total of the contents of the five types of triads are calculated from the following equations; PPE CXS EP = PPE CXS PPE CXS + EPE CXS + PEP CXS + PEE CXS + EEE CXS EPE CXS EP = EPE CXS PPE CXS + EPE CXS + PEP CXS + PEE CXS + EEE CXS PEP CXS EP = PEP CXS PPE CXS + EPE CXS + PEP CXS + PEE CXS + EEE CXS PEE CXS EP = PEE CXS PPE CXS + EPE CXS + PEP CXS + PEE CXS + EEE CXS EEE CXS EP = EEE CXS PPE CXS + EPE CXS + PEP CXS + PEE CXS + EEE CXS (3) the ratios, PPE EP CXIS , EPE EP CXIS , PEP EP CXIS , PEE EP CXIS , and EEE EP CXIS , of the respective five types of triads contained in the CXIS to the sum total of the contents of the five types of triads are calculated from the following equations; PPE CXIS EP = PPE CXIS PPE CXIS + EPE CXIS + PEP CXIS + PEE CXIS + EEE CXIS EPE CXIS EP = EPE CXIS PPE CXIS + EPE CXIS

Assignees

Sumitomo Chemical Co

Inventors

Classifications

C08L23/12Primary
Polypropene · CPC title
C08K5/14
Peroxides · CPC title
C08F293/00Primary
Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule (on to polymers modified by introduction of unsaturated end groups C08F290/02) · CPC title
C08L23/16
Ethylene-propylene or ethylene-propylene-diene copolymers · CPC title
C08L53/005
Modified block copolymers · CPC title

Patent family

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Frequently asked questions

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What does patent US9303112B2 cover?: Disclosed are a propylene resin material capable of affording a molded article superior in impact properties, tensile properties, and appearance, and a method for producing the same. The propylene resin material includes a propylene homopolymer portion and a propylene-ethylene copolymer portion and satisfies specific requirements. The production method includes the step of mixing an organic per…
Who is the assignee on this patent?: Sumitomo Chemical Co
What technology area does this patent fall under?: Primary CPC classification C08L23/12. Mapped technology areas include Chemistry & Metallurgy.
When was this patent published?: Publication date Tue Apr 05 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
What related patents are in patentsdb?: We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).