Invention Grant
- Patent Title: Water-dispersed pressure-sensitive adhesive composition, pressure-sensitive adhesive and pressure-sensitive adhesive sheet
- Patent Title (中): 水分散型压敏粘合剂组合物,压敏粘合剂和压敏粘合片
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Application No.: US13643455Application Date: 2012-04-24
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Publication No.: US08541501B2Publication Date: 2013-09-24
- Inventor: Mika Okada , Chie Kitano
- Applicant: Mika Okada , Chie Kitano
- Applicant Address: JP Osaka
- Assignee: Nitto Denko Corporation
- Current Assignee: Nitto Denko Corporation
- Current Assignee Address: JP Osaka
- Agency: Sughrue Mion, PLLC
- Priority: JP2011-117951 20110526; JP2011-160387 20110722; JP2012-033057 20120217
- International Application: PCT/JP2012/060943 WO 20120424
- International Announcement: WO2012/160929 WO 20121129
- Main IPC: C08L25/10
- IPC: C08L25/10 ; C08L33/08 ; C08L9/08 ; C08L33/10 ; C08L33/12 ; C08L9/02 ; C08L9/04 ; C08L9/06 ; C08L9/00 ; C08K5/00 ; C08F20/40 ; C08F36/06 ; C08F20/44 ; C08F12/08

Abstract:
Provided is a water-dispersed pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive that exhibits good adhesiveness to a non-polar adherend and maintains its properties at a low temperature. The water-dispersed pressure-sensitive adhesive composition according to the present invention comprises a (meth)acrylic polymer obtained by polymerizing a monomer composition containing as a primary component an alkyl (meth)acrylate having an alkyl group with 1 to 18 carbon atoms, a latex containing a rubber component that is immiscible with the (meth)acrylic polymer and has a loss tangent peak temperature of −5° C. or below when determined by a dynamic viscoelastic measurement in which shear strain is applied at a frequency of 1 Hz, and a tackifier that is miscible with the rubber component, but immiscible with the (meth)acrylic polymer.
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