Poly(.alpha.-olefin) pressure sensitive adhesvie tape with a priming layer
AssigneeMinnesota Mining and Manufacturing Company
InventorStephen J. Hawkins
Life of this patent
Estimating the term…
Abstract
In a PSA tape construction, a primer layer comprising a neutralized rosin that includes acid functionalities and, optionally, an elastomer such as a styrene-butadiene rubber, is included between a tape backing and a poly(.alpha.-olefin) adhesive layer. Bonding of the adhesive layer to the backing is greatly improved, especially during and after high temperature baking of the tape construction.
Claims29
A pressure sensitive adhesive tape construction comprising:
- (a) a substrate;
- (b) on at least one surface of said substrate, a primer comprising the metal salt of a rosin acid;
- and
- (c) coated on said primer, a layer of poly(.alpha.-olefin) pressure sensitive adhesive;
- wherein said poly(.alpha.-olefin) pressure sensitive adhesive does not transfer to a surface after being adhered thereto, exposed to 177.degree. C. for 30 minutes, and removed immediately thereafter.
A pressure sensitive adhesive tape construction comprising:
- (a) a paper backing saturated with styrene-butadiene rubber;
- (b) on a surface of said backing, a primer layer comprising an alkali metal salt of a hydrogenated rosin and styrene-butadiene rubber;
- and
- (c) coated on said primer, a layer of a poly(.alpha.-olefin) pressure sensitive adhesive;
- wherein said poly(.alpha.-olefin) pressure sensitive adhesive does not transfer to a surface after being adhered thereto, exposed to 177.degree. C. for 30 minutes, and removed immediately thereafter.
A pressure sensitive adhesive tape construction comprising:
- (a) a substrate;
- (b) on at least one surface of said substrate, a primer comprising greater than 25 wt-% of the metal salt of a rosin acid;
- and
- (c) coated on said primer, a layer of poly(.alpha.-olefin) pressure sensitive adhesive.
A pressure sensitive adhesive tape construction comprising:
- (a) a paper backing saturated with styrene-butadiene rubber;
- (b) on a surface of said backing, a primer layer comprising greater than 25 wt-% of an alkali metal salt of a hydrogenated rosin and styrene-butadiene rubber;
- and
- (c) coated on said primer, a layer of a poly(.alpha.-olefin) pressure sensitive adhesive.
Dependencies are inferred from the claim text.