3m Innovative Properties Company

Benjamin J Bending

Stephen A Johnson

Richard G Hansen

David S Hays

Albert I Everaerts

Kyle J Lindstrom

Jason D Clapper

Alexander J Kugel

Richard Yufeng Liu

Ryan T Fabick

Edward J Kivel

Zhong Chen

Victor Ho

Vasav Sahni

Nathaniel I Lehn

Pierre Reinhard Bieber

Jacob P Johnson

Roger A Grisle

Ying Zhang

Matthew T Holbrook

Christopher W A Krohe

Vincent Jusuf

Dean A Miner

John W McAllister

Kristen L Bellmer

Nicholas W Lang

Daniel M Peppin

Scott M Spear

An adhesive composition is described comprising a polyisobutylene polymer component; and up to 30 wt.-% of at least one aliphatic multifunctional component comprising at least two ethylenically unsaturated groups selected from (meth)acryl or vinyl ether. The monomer comprises a hydrocarbon moiety with greater than 12 contiguous carbon atoms. When the hydrocarbon moiety is branched, the hydrocarbon moiety comprises side chains with at least two carbon atoms. The aliphatic multifunctional component is sufficiently compatible such that crosslinked adhesive composition at a thickness of 20 microns has a haze of less than 3%. Also described are adhesive articles.

Polyisobutylene adhesive comprising multifunctional component with (meth)acryl or vinyl ether groups

Articles comprising, in order: a first adherend, a first primer layer, an adhesive layer, and a second adherend are provided, where the adhesive layer comprises pressure sensitive adhesive domains and structural adhesive domains. Typically, the first primer layer covers first portions of the first adherend adjacent to structural adhesive domains and does not cover second portions of the first adherend adjacent to pressure sensitive adhesive domains. Methods of making such articles are provided, which comprise applying a cure-initiating primer to first portions of the first adherend to form a first primer layer while leaving second portions of the first adherend bare of the first primer layer, and thereafter applying a curable adhesive film over the first primer layer, such that portions of the curable adhesive film are cured to form structural adhesive domains and other portions remain uncured pressure sensitive adhesive domains.

Adjustable hybrid PSA/structural adhesive bonds by patterned surface-initiated cure

Adhesives including a polyester at 20 to 50 weight percent, a first tackifier at 30 to 60 weight percent, and a first olefin-styrene block copolymer at 5 to 30 weight percent are described. The polyester has a glass transition temperature between &#x2212;40&#xb0; C. and &#x2212;10&#xb0; C., and the adhesive has a heat activation temperature between 20&#xb0; C. and 100&#xb0; C. Damping films including at least one layer of the adhesive and including a foamed layer are described. The foamed layer includes a second olefin-styrene block copolymer at 30 to 80 weight percent and a second tackifier at 15 to 60 weight percent.

Adhesive and damping film

A birefringent polyester film includes naphthalate units, ethylene units, a titanate compound, a planar branching unit, and 1 to 80 ppm metal content. The birefringent polyester film has an out-of-plane birefringence of at least 0.1 at 633 nm.

Birefringent polyester film with low haze having specified Tan Delta value

A copolymer comprises at least two repeating units of formula I In this formula each Ris independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each Y is independently an alkylene, aralkylene, or a combination thereof; each G is independently a bond or a divalent residue equal to a diamine of formula RHN-G-NHRminus the two &#x2014;NHRgroups; each Ris independently hydrogen or alkyl or Rtaken together with G and to the nitrogen to which they are both attached form a heterocyclic group; each n is independently an integer of 0 to 1500; each p is independently an integer of 1 to 10; and each q is independently an integer of 1 or greater, and wherein at least 50% of the q's are the integer 2.

Silicone polyoxamide and silicone polyoxamide-hydrazide copolymers

Silicone polyoxamide and silicone polyoxamide-hydrazide copolymers comprise at least two repeating units of formula I In this formula, each Ris independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo; each Y is independently an alkylene, aralkylene, or a combination thereof; each G is independently a bond or a divalent residue equal to a diamine of formula RHN-G-NHRminus the two &#x2014;NHRgroups; each Ris independently hydrogen or alkyl or Rtaken together with G and with the nitrogen to which they are both attached form a heterocyclic group; each n is independently an integer of 0 to 1500; each p is independently an integer of 1 to 10, and the average of p is 1.2 or greater; and each q is independently an integer of 1 or greater, and every q is not the same integer.

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Madison, WI, United States of America

Benjamin J Bending