Pressure sensitive polyacrylate adhesive

专利名称：Pressure sensitive polyacrylate adhesive发明人：HUSEMANN, MARC,ZOELLNER, STEPHAN申请号：EP02020113.3申请日：20020913公开号：EP1302521B1公开日：20080305

摘要：Stearic acid-containing, polyacrylate-based pressure-sensitive adhesive materialwhich is homogeneous (with no segments larger than 5 nm) and shows an adhesion tosteel of 1.5 N/cm in a layer thickness of 20 g/m<2>, with NOTGREATER 20% change inadhesion after storage for 3 months at 50 degrees C. Polyacrylate-based pressure-sensitive adhesive material (I) containing (at least) a mixture of: (1) a copolymer of (a) 28-93.9 wt% (meth)acrylate esters of formula (1); (b) 5-35 wt% esters of formula (2); and (c)1.1-7 wt% free (meth)acrylic acid; and (2) 1-10 wt% stearic acid. CH2=C(R1)COOR2 (1)CH2=C(R3)COOR4 (2) R1, R3 = H or methyl; R2 = 1-14C linear or branched alkyl; R4 =alkyl with at least 16 C atoms, or cycloalkyl with at least 9 C atoms Material (I) ishomogeneous, with no segments larger than 5 nm; it shows an adhesion to steel of 1.5N/cm in a layer thickness of 20 g/m<2> and the adhesion shows a change of

NOTGREATER 20% after the material has been stored for 3 months at 50 degrees C. AnIndependent claim is also included for a method for the production of (I) comprising thesteps of: (1) polymerizing the above monomer mixture; (2) mixing the polymer with (2) 1-10 wt% stearic acid; (3) adding (iii) 0.1-1 wt% of a polyfunctional thermal crosslinker whichreacts with carboxylic acid and/or hydroxyl groups; and (4) crosslinking the mixture.

申请人：TESA AG,TESA AG,TESA AG

地址：DE

国籍：DE

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