Methacrylic resin, methacrylic resin composition, film, and production method
US-2018305538-A1 · Oct 25, 2018 · US
Methacrylic resin composition and use thereof
US11299600B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11299600-B2 |
| Application number | US-201816488102-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 21, 2018 |
| Priority date | Feb 22, 2017 |
| Publication date | Apr 12, 2022 |
| Grant date | Apr 12, 2022 |
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- Title
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Abstract
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A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10 −6 to 9×10 −3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50 part by mass of a hindered phenol antioxidant such as 2,6-bis(1,1-dimethylethyl)-4-methylphenol, wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass.
First claim
Opening claim text (preview).
The invention claimed is: 1. A methacrylic resin composition comprising: 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole; from 1×10 −5 to 5.0×10 −4 part by mass of Al element; from 1×10 −6 to 0.5×10 −4 part by mass of Li element; and from 0.025 to 0.50 part by mass of 2,6-bis(1,1-dimethylethyl)-4-methylphenol; wherein the methacrylic resin composition, when being exposed to a nitrogen gas atmosphere at 290° C. for 15 minutes, has a thermogravimetric retention of not less than 98% by mass. 2. The methacrylic resin composition according to claim 1 , wherein the methacrylic resin has an amount of a bonded sulfur atom of less than 0.25% by mole. 3. The methacrylic resin composition according to claim 1 , wherein the methacrylic resin has a triad svndiotacticity (rr) of not less than 50%. 4. The methacrylic resin composition according to claim 1 , wherein the methacrylic resin has a weight average molecular weight of 50 thousand to 200 thousand. 5. The methacrylic resin composition according to claim 1 , wherein the methacrylic resin comprises not less than 99% by mass of a structural unit derived from methyl methacrylate. 6. A pelletized forming material comprising the methacrylic resin composition according to claim 1 . 7. A shaped product comprising the methacrylic resin composition according to claim 1 . 8. A film comprising the methacrylic resin composition according to claim 1 . 9. The film according to claim 8 , having a thickness of 10 to 50 μm. 10. The film according to claim 8 , being uniaxially stretched or biaxially stretched to 1.5 to 8 times in an area ratio.
Assignees
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Classifications
Methyl esters {, e.g. methyl (meth)acrylate} · CPC title
Alkali metal · CPC title
Homopolymers or copolymers of methyl methacrylate · CPC title
Homopolymers or copolymers of methacrylic acid esters · CPC title
Carboxylic esters of phenolcarboxylic acids · CPC title
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- What does patent US11299600B2 cover?
- A methacrylic resin composition comprising 100 parts by mass of a methacrylic resin having an amount of a terminal double bond of less than 0.012% by mole and an amount of a bonded sulfur atom of preferably less than 0.25% by mole; 5×10 −6 to 9×10 −3 part by mass of a metal element having an atomic number of not more than 20 (preferably lithium element and aluminum element); and 0.025 to 0.50…
- Who is the assignee on this patent?
- Kuraray Co
- What technology area does this patent fall under?
- Primary CPC classification C08K3/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 12 2022 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).