Interlayer film and laminated glass comprising the same
US-10676578-B1 · Jun 9, 2020 · US
Interlayer film and laminated glass comprising the same
US11198770B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11198770-B2 |
| Application number | US-202016823545-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2020 |
| Priority date | May 10, 2019 |
| Publication date | Dec 14, 2021 |
| Grant date | Dec 14, 2021 |
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- Title
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Abstract
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The present disclosure relates to an interlayer film for laminated glass comprising: (a) polyvinyl butyral (PVB) resin having an average molecular weight (Mw) as measured by Gel Permeation Chromatography (GPC) from about 175,000 to about 210,000 Dalton; and (b) about 30 to about 50 parts per hundred (pph) of a plasticizer. The interlayer film interposed between two glass sheets forms laminated glass having a pummel adhesion value that is greater in an outer area of the laminated glass than in a middle area of the laminated glass after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. The laminated glass exhibits improved durability and does not delaminate over time, even in the presence of high temperature and humidity conditions.
First claim
Opening claim text (preview).
The invention claimed is: 1. An interlayer film comprising polyvinyl butyral (PVB) resin having an average molecular weight (Mw) as measured by Gel Permeation Chromatography (GPC) from about 175,000 to about 210,000 Dalton, wherein the interlayer film when interposed between two glass sheets forms laminated glass having a pummel adhesion value that is greater in an outer area of the laminated glass than in a middle area of the laminated glass after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days, the outer area of the laminated glass being the area formed by outer edges of a perimeter of the laminated glass and extending inward toward the center of the laminated glass by a distance of 5 mm, and the middle area of the laminated glass is an area in the middle of the laminated glass having a size of 50 mm × 50 mm. 2. The interlayer film of claim 1 , wherein the pummel adhesion value of the outer area of the laminated glass differs from pummel adhesion value of the middle area of the laminated glass by at least 2 after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. 3. The interlayer film of claim 1 , wherein pummel adhesion value of the outer area of the laminated glass is at least 8 after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. 4. The interlayer film of claim 1 , wherein pummel adhesion value of the outer area of the laminated glass is at least 9 after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. 5. The interlayer film of claim 1 , wherein pummel adhesion value of the middle area of the laminated glass is from 4 to 7 and the pummel adhesion value of the outer area of the laminated glass differs from pummel adhesion value of the middle area of the laminated glass by at least 2 after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. 6. The interlayer film of claim 1 , wherein the pummel adhesion value of the middle area of the laminated glass is essentially unchanged after the laminated glass has been maintained at 50° C. and 95% relative humidity (RH) for 28 days. 7. Laminated glass comprising an interlayer film of claim 1 .
Assignees
Inventors
Classifications
- C08J5/18Primary
Manufacture of films or sheets · CPC title
Homopolymers or copolymers of acetals or ketals obtained by polymerisation of unsaturated acetals or ketals or by after-treatment of polymers of unsaturated alcohols · CPC title
Compounds containing metals of Groups 1 to 3 or of Groups 11 to 13 of the Periodic Table · CPC title
with polyalcohols · CPC title
Metal salts of carboxylic acids · CPC title
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- What does patent US11198770B2 cover?
- The present disclosure relates to an interlayer film for laminated glass comprising: (a) polyvinyl butyral (PVB) resin having an average molecular weight (Mw) as measured by Gel Permeation Chromatography (GPC) from about 175,000 to about 210,000 Dalton; and (b) about 30 to about 50 parts per hundred (pph) of a plasticizer. The interlayer film interposed between two glass sheets forms laminated …
- Who is the assignee on this patent?
- Chang Chun Petrochemical Co Ltd
- 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 Dec 14 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).