Patent · US Active

Multilayer films including thermoplastic silicone block copolymers

US7820297B2 · kind B2 · utility

10Cited by

47References

6Claims

0Family size

Assignee

3M INNOVATIVE PROPERTIES COMPANY · US

Inventors

Karl E. Benson · Windom, US
Richard G. Hansen · Mahtomedi, US
Stephen A. Johnson · Woodbury, US
Charles M. Leir · New Richmond, US
Richard Y. Liu · Woodbury, US
Mark D. Purgett · Oakdale, US
Hildegard Schneider · Steinen, DE
Audrey A. Sherman · Windom, US

Key dates

Filing date	Dec 21, 2006
Grant date	Oct 26, 2010
Priority date	—
Expiry date	Aug 16, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31663
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A multilayer film includes a first layer of a first polymeric material and a second layer of a second polymeric material. The first material has a first index of refraction and the second material has a second index of refraction less than the first index of refraction. In one embodiment, the second material includes a polydiorganosiloxane polyamide block copolymer. In another embodiment, the second material includes a polydiorganosiloxane polyoxamide block copolymer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.