Nanoclay filled barrier adhesive compositions
Assignee3M Innovative Properties Company
InventorsJacob P. Johnson, Fred B. McCormick, Adam J. Meuler, Richard J. Pokorny, Daniel J. Schmidt
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Abstract
A barrier adhesive composition comprising a resin system and organically modified nanoclay. The resin system comprises (a) a first polyisobutylene resin having a viscosity average molecular weight of about 300,000 to about 500,000 g/mol, (b) a second polyisobutylene resin having a viscosity average molecular of about 700,000 to about 900,000 g/mol and (c) tackifier.
Claims22
An adhesive barrier film comprising a layer of barrier adhesive composition on an ultra-barrier film having an oxygen transmission rate less than 0.005 cc/m2/day at 23° C. and 90% RH and a water vapor transmission rate of less than 0.005 g/m2/day at 23° C. and 90% RH, wherein the barrier adhesive composition comprises a resin system and organically modified nanoclay, the resin system comprising:
- (a) a first polyisobutylene resin having a viscosity average molecular weight of about 300,000 to about 500,000 g/mol;
- (b) a second polyisobutylene resin having a viscosity average molecular of about 700,000 to about 900,000 g/mol;
- and
- (c) tackifier.
An adhesive barrier film comprising a barrier adhesive composition on an ultra-barrier film having an oxygen transmission rate less than 0.005 cc/m2/day at 23° C. and 90% RH and a water vapor transmission rate of less than 0.005 g/m2/day at 23° C. and 90% RH, wherein the barrier adhesive composition comprises a resin system, organically modified nanoclay, and solvent, the resin system comprising:
- (a) about 15 to about 35 wt. % of a first polyisobutylene resin having a viscosity average molecular weight of about 300,000 to about 500,000 g/mol,
- (b) about 40 to about 60 wt. % of a second polyisobutylene resin having a viscosity average molecular of about 700,000 to about 900,000 g/mol, and
- (c) about 15 to about 35 wt. % of tackifier,
- all relative to the total weight of the resin system.
Dependencies are inferred from the claim text.