Degradable polymeric compositions and articles comprising same
US-2024425683-A1 · Dec 26, 2024 · US
Method for producing stretched film
US10273337B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10273337-B2 |
| Application number | US-201414899789-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 24, 2014 |
| Priority date | Jul 1, 2013 |
| Publication date | Apr 30, 2019 |
| Grant date | Apr 30, 2019 |
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- Title
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Abstract
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The present invention is a method for producing a stretched film comprising stretching an unstretched film that is formed using a hydrogenated dicyclopentadiene ring-opening polymer at a temperature of 95 to 135° C. and a stretching ratio of 1.2 to 10, followed by heating at a temperature of 150 to 220° C. Since the thus-obtained stretched film has excellent transparency and low coefficient of linear expansion, the stretched film is suitable for not only use in optical applications but also use for electronic materials.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for producing a stretched film comprising stretching an unstretched film that is formed using a crystalline hydrogenated dicyclopentadiene ring-opening polymer that has a ratio of raceme diads of 60% or more and a melting point of 260 to 275° C., at a temperature of 95 to 135° C. and a stretching ratio of 1.2 to 10, followed by heating at a temperature of 150 to 220° C. to obtain the stretched film; wherein a haze of the stretched film is 0.9% or less, and a coefficient of linear expansion of the stretched film is: 86 ppm or less at 60 to 100° C., 169 ppm or less at 130 to 150° C., and 205 ppm or less at 170 to 180° C. 2. An optical film produced using the method for producing a stretched film according to claim 1 . 3. An electronic material produced using the method for producing a stretched film according to claim 1 .
Assignees
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Classifications
Use as polymer for film forming · CPC title
Characterised by the use 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; Derivatives of such polymers · CPC title
Hydrogenation · CPC title
Peculiar tacticity · CPC title
Use of polymers of unsaturated cyclic compounds having no unsaturated aliphatic groups in a side-chain, e.g. coumarone-indene resins or derivatives thereof, as moulding material · CPC title
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- What does patent US10273337B2 cover?
- The present invention is a method for producing a stretched film comprising stretching an unstretched film that is formed using a hydrogenated dicyclopentadiene ring-opening polymer at a temperature of 95 to 135° C. and a stretching ratio of 1.2 to 10, followed by heating at a temperature of 150 to 220° C. Since the thus-obtained stretched film has excellent transparency and low coefficient of …
- Who is the assignee on this patent?
- Zeon Corp
- What technology area does this patent fall under?
- Primary CPC classification C08J5/18. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 30 2019 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).