Melt-processible vinyl fluoride interpolymers of low crystallinity
US-2015011697-A1 · Jan 8, 2015 · US
Method for producing modified molded article of fluororesin
US11021582B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11021582-B2 |
| Application number | US-201815985567-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 21, 2018 |
| Priority date | Jan 20, 2015 |
| Publication date | Jun 1, 2021 |
| Grant date | Jun 1, 2021 |
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- Title
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Abstract
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The present invention aims to provide a method for producing a modified molded article that has favorable appearance, high breaking strength, and excellent abrasion resistance, as well as excellently low permeability to nitrogen gas and hydrochloric acid. The method for producing a modified molded article of the present invention includes molding a fluororesin to provide a molded article and irradiating the molded article with radiation at an irradiation dose of lower than 100 kGy at 50° C. to 200° C. to provide a modified molded article.
First claim
Opening claim text (preview).
The invention claimed is: 1. A molded article comprising a melt-fabricable fluororesin excluding polytetrafluoroethylene and polychlorotrifluoroethylene, containing no inorganic substance or no polytetrafluoroethylene, having a specific gravity of 2.170 or higher, and having a breaking strength of 13 MPa or higher, wherein the melt-fabricable fluororesin is at least one copolymer selected from the group consisting of a tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer (PFA) and a tetrafluoroethylene (TFE)/hexafluoropropylene (HFP) copolymer (FEP), wherein the PFA contains 3.1 to 10 mass % of a polymerized unit based on perfluoro(alkyl vinyl ether) (PAVE) relative to all the polymerized units, wherein the FEP has a mass ratio (TFE/HFP) between the TFE unit and the HFP unit of (85 to 95)/(5 to 15) (mass %), and wherein the melt-fabricable fluororesin contains a functional group which is at least one selected from the group consisting of —CF═CF 2 , —COF, —COOH, —CONH 2 , and —CH 2 OH.
Assignees
Inventors
Classifications
with fluorinated vinyl ethers · CPC title
Treatment by wave energy or particle radiation (C08J7/18 takes precedence) · CPC title
Homopolymers or copolymers of tetrafluoroethylene · CPC title
- C08J3/28Primary
Treatment by wave energy or particle radiation · CPC title
Manufacture of films or sheets · CPC title
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- What does patent US11021582B2 cover?
- The present invention aims to provide a method for producing a modified molded article that has favorable appearance, high breaking strength, and excellent abrasion resistance, as well as excellently low permeability to nitrogen gas and hydrochloric acid. The method for producing a modified molded article of the present invention includes molding a fluororesin to provide a molded article and ir…
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C08J3/28. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jun 01 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).