Patent · US Expired

Silicone copolymer modified release tapes

US5866222A · kind A · utility

33Cited by

4References

48Claims

0Family size

Assignee

Minnesota Mining and Manufacturing Company · US

Inventors

Jayshree Seth · Woodbury, US
Stephen W. Bany · Oakdale, US
David J. Kinning · Woodbury, US

Key dates

Filing date	Jul 18, 1997
Grant date	Feb 2, 1999
Priority date	—
Expiry date	Jul 18, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T442/2328
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

There is provided a block, segmented or graft copolymer having polyorganosiloxane segments and self-associating hard segments, which copolymer is capable of forming a solid, generally non-tacky release coating without the requirement of curing. The release coating comprises the polyorganosiloxane copolymer admixed with an MQ resin wherein the amount of MQ resin is generally between 1 and 30 weight percent of the polyorganosiloxane content preferably 1 to 20 weight percent. The MQ resin modifies the copolymer release material to have a higher release than the copolymer itself, generally at least 10 percent and preferable at least 20 percent up to 50 percent or higher with the readhesion values decreasing by 50 percent or less, preferably 40 percent or less.

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