Release layers and compositions for forming the same

US6342324B1 · kind B1 · utility

Assignee

• Imation Corp. · US

Inventors

• Minyu Li · Oakdale, US
• M. Zaki Ali · Woodbury, US
• Eric D. Morrison · West St. Paul, US
• Charles W. Simpson · Lakeland, US
• Leonard Stulc · Brainerd, US
• Ramnath Subramaniam · North Oaks, US
• Jiayi Zhu · Woodbury, US

Key dates

• Filing date: Feb 16, 2000
• Grant date: Jan 29, 2002
• Expiry date: Feb 16, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D183/04
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Release compositions include(a) from zero to about 30 parts by weight of a polymer selected from the group consisting of wherein R1, R2, R3, R6, R7, R10, R11, and R12 are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least one of R6 and R7 is an alkenyl group,l, m, and n are each independently an integer so long as the polymer contains greater than 3 mol % vinyl-containing siloxane groups; a (vinyl siloxy)(siloxy)-modified silica having a vinyl content of at least about 0.4 vinyl equivalent/kg; and a combination thereof;(b) more than about 20 parts by weight of a polymer having the formula wherein R13, R14, R15, R18, R19, R22, R23, and R24 are each independently selected from an alkyl group, an alkenyl group, an aryl group, and an aralkyl group, such that at least two of R13, R14, R15, R18, R19, R22, R23, and R24 are alkenyl groups,p, q, and r are each independently integers so long as the polymer has less than 3 mol % vinyl-containing siloxane groups; and(c) up to about 20 parts by weight of a cross-linking agent of the formula wherein R36, R37, R38, R43, R44, and R45 are each independently selected from hydrog…