Invention Grant
- Patent Title: Multilayered articles with low optical retardation
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Application No.: US15124882Application Date: 2015-05-01
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Publication No.: US09720155B2Publication Date: 2017-08-01
- Inventor: Jian Zhou , Adel Bastawros , Wei Feng , Zhi Wang , Yuan Zhou
- Applicant: SABIC Global Technologies B.V.
- Applicant Address: NL Bergen Op Zoom
- Assignee: SABIC GLOBAL TECHNOLOGIES
- Current Assignee: SABIC GLOBAL TECHNOLOGIES
- Current Assignee Address: NL Bergen Op Zoom
- Agency: Cantor Colburn LLP
- International Application: PCT/US2015/028868 WO 20150501
- International Announcement: WO2015/168610 WO 20151105
- Main IPC: G02B5/02
- IPC: G02B5/02 ; G02B5/30 ; B32B27/08 ; B32B27/30 ; B32B27/32 ; B32B27/36 ; B29C47/06 ; B29C47/88 ; B29C59/02 ; B29D11/00 ; G02F1/1335 ; B29L9/00 ; B29L11/00

Abstract:
A coextruded multilayered thermoplastic article including: a first layer with a first surface texture, wherein the first layer comprises a first transparent thermoplastic polymer having a first stress optical coefficient (Cm1) measured at 20° C. above the glass transition temperature of the first polymer; a second layer located comprising a second transparent thermoplastic polymer having a second stress optical coefficient (Cm2) measured at 20° C. above the glass transition temperature of the second matrix; wherein a relation between the first stress optical coefficient and the second stress optical coefficient is Cm2>4(Cm1) (Formula A) wherein the thickness of the first layer measured from the highest peaks of the first surface texture to the second side of the first layer is greater than 1.5 times Rz of the first surface texture but less than or equal to 75% of the total thickness of the article.
Public/Granted literature
- US20170045655A1 MULTILAYERED ARTICLES WITH LOW OPTICAL RETARDATION Public/Granted day:2017-02-16
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