Stretch releasing pressure sensitive adhesive tape and articles
Assignee3M Innovative Properties Company
InventorsMargaret M. Sheridan, James L. Bries, Jeffrey D. Malmer, Audrey A. Sherman, David J. Kinning
Life of this patent
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Abstract
A stretch releasing pressure sensitive adhesive tape includes a silicone pressure sensitive adhesive composition that exhibits a 180° peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm and a non-tacky tab. A stretch releasing pressure sensitive adhesive tape includes a pressure sensitive adhesive composition having a modulus at 1 radian/second and −17° C. of no greater than about 1×107 Pa and a non-tacky tab.
Claims42
A stretch releasing adhesive tape comprising
- a silicone pressure sensitive adhesive composition that exhibits a 180° peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm,
- said pressure sensitive adhesive composition comprising
- a. silicone polyurea block copolymer comprising the reaction product of
- i) polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, and
- ii) polyisocyanate, and
- b. from about 30% by weight to about 70% by weight MQ resin;
- and
- a non-tacky tab.
A kit comprising:
- a device for holding an article;
- and
- a stretch releasing pressure sensitive adhesive tape capable of forming a bond to a surface of said device and to a substrate,
- said tape comprising a silicone pressure sensitive adhesive composition that exhibits a 180° peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm,
- said pressure sensitive adhesive composition comprising
- a. silicone polyurea block copolymer comprising the reaction product of
- i) polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, and
- ii) polyisocyanate, and
- b. from about 30% by weight to about 70% by weight MQ resin.
A stretch releasing adhesive article comprising:
- an extensible backing;
- and
- a silicone pressure sensitive adhesive composition disposed on a first major surface of said backing, said silicone pressure sensitive adhesive composition exhibiting a 180° peel strength on a glass substrate at 98% relative humidity of at least about 5.47 N/dm, said silicone pressure sensitive adhesive composition comprising
- a. silicone polyurea block copolymer comprising the reaction product of
- i) polydiorganosiloxane diamine having a molecular weight of at least 5,000 g/mole, and
- ii) polyisocyanate, and
- b. from about 30% by weight to about 70% by weight MQ resin.
Dependencies are inferred from the claim text.