公开(公告)号：US20190284446A1

公开(公告)日：2019-09-19

申请号：US16347361

申请日：2017-10-05

Applicant: TESA SE

Inventor： Alexander PRENZEL ,  Julia BEFUSS

IPC: C09J7/38

Abstract: The intention is to provide an adhesive system which is stable in storage and which when used permits precise positioning of the adhesive, and which can be crosslinked without exceeding moderate temperatures. The said system is moreover intended to provide strong adhesive bonds that attain high performance levels. This is achieved via a kit containing at least two pressure-sensitive adhesive layers A and B, where the two pressure-sensitive adhesive layers A and B mutually independently respectively comprise at least one polymer containing a multiplicity of carboxy groups; in the pressure-sensitive adhesive layer A a portion of the carboxy groups of the polymer containing these has been activated by reaction with an activator AA; and—the pressure-sensitive adhesive layer A—at least one crosslinking agent VA which can enter into a crosslinking reaction with the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layers A and B, but which in the pressure-sensitive adhesive layer A is not significantly reactive; —the pressure-sensitive adhesive layer B—at least one crosslinking agent VB which can accelerate the crosslinking reaction of the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer B with the crosslinking agent VA and which can permit and accelerate the crosslinking reaction of the carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer A with the crosslinking agent VA and can enter into a crosslinking reaction with the activated carboxy groups of the polymer containing these of the pressure-sensitive adhesive layer A. The invention moreover also relates to an adhesive tape which is obtainable via contact between the pressure-sensitive adhesive layers of the kit, and to a process for producing said adhesive tape.

公开(公告)号：US20170183547A1

公开(公告)日：2017-06-29

申请号：US15359908

申请日：2016-11-23

Applicant: TESA SE

Inventor： Sarah Bamberg ,  Julia BEFUSS ,  Benjamin PUETZ ,  Alexander PRENZEL

IPC: C09J133/08

CPC classification number: C09J133/08 ,  B29B7/485 ,  B29B7/487 ,  B29B7/845 ,  C08F220/18 ,  C08K5/5419 ,  C08K5/544 ,  C09J133/02 ,  C08F2220/1825 ,  C08F2220/1858 ,  C08F220/06 ,  C08F2220/1875 ,  C08F220/14 ,  C08K5/5435

Abstract: The intention is to provide a thermally crosslinkable, polyacrylate-based composition which can be processed from the melt and is distinguished by long pot life and by rapid and complete or near-complete crosslinkability even at relatively low temperatures, which can be processed to a pressure-sensitive adhesive. This aim is accomplished with a composition which comprises a) at least one crosslinkable poly(meth)acrylate; b) at least one organosilane conforming to the formula (1) R1—Si(OR2)nR3m  (1), in which R1 is a radical containing a cyclic ether function, the radicals R2 independently of one another are each an alkyl or acyl radical, R3 is a hydroxyl group or an alkyl radical, n is 2 or 3 and m is the number resulting from 3-n; and c) at least one substance accelerating the reaction of the crosslinkable poly(meth)acrylate with the cyclic ether functions. The patent application further provides a pressure-sensitive adhesive obtainable from the composition.