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UV-Crosslinkable Resin-Modified Adhesives

A technology of pressure-sensitive adhesives and phenolic resins, applied in the direction of film/sheet adhesives, adhesive types, polystyrene adhesives, etc., can solve the difficulty of consistency of adhesion and cohesion, flow properties Deterioration and other issues

Active Publication Date: 2017-11-10
TESA SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, however, flow properties will deteriorate compared to unblended compositions
As a result, it becomes very difficult to ensure a consistent balance between adhesion and cohesion over time

Method used

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  • UV-Crosslinkable Resin-Modified Adhesives
  • UV-Crosslinkable Resin-Modified Adhesives
  • UV-Crosslinkable Resin-Modified Adhesives

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0066] Run the following tests:

[0067] Warping property-TFT

[0068] The warp resistance is measured by the so-called TFT (Tilt Time Threshold) method. In this method, the following test is employed, in which a specimen made in planar form is applied to 1 1 / 2 ” core, creating additional flexural stress. The combination of tensile load and flexural stress produced by the test weight results in a warped detachment of the tape, starting from the bonded upper end and resulting in the eventual failure (see figure 1 , where a schematic configuration is also shown).

[0069] The result is the time until drop expressed in minutes.

[0070] The key parameters for the sample hold time are weight and temperature, the weight being chosen so as to obtain a value of at least 100 minutes.

[0071] The test mandrel is a 1 with an outer diameter of 42 ± 2mm 1 / 2 "Card core (card core), set the marking line at 5mm near the apex line.

[0072] The adhesive substrate is the opposit...

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Abstract

The aim is to use UV-crosslinkable adhesives to reduce the tendency of the bond to warp. This object is achieved by providing a composition comprising at least one UV-crosslinkable polyacrylate and at least one terpene-phenolic resin, the total concentration of the terpene-phenolic resin being based on the total weight of the composition is 1-5wt%. The invention also relates to pressure-sensitive adhesives prepared on the basis of this composition, adhesive tapes based on this adhesive and the use of said adhesive tapes for winding elongated materials such as cable strands.

Description

technical field [0001] The invention relates to the technical field of crosslinkable hotmelt adhesives, in particular such UV-crosslinkable polyacrylate hotmelt adhesives, which are used, for example, for the production of pressure-sensitive adhesives. In particular, the present invention proposes a polyacrylate-based adhesive for the production of adhesive tapes with improved flagging characteristics. Background technique [0002] The importance of hot melt adhesives in industrial gluing processes is increasing. Because they can be processed solvent-free, they allow processes with a low resource impact, in particular the costly and inconvenient step of removing the solvent after the adhesive has been delivered has been dispensed with. In the field of adhesive tape manufacture, the usual procedure is to apply the adhesive from the melt to the carrier and then crosslink it thermally or by radiation to form a polymer with a higher molecular weight. Adhesives processed in thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J133/08C09J7/02C09J7/04H01B7/17
CPCC09J11/08C09J2203/302C09J133/06C08L2312/06C09J7/385C08L65/02Y10T428/2936Y10T428/2809Y10T428/273Y10T442/2754B29K2033/08B29K2101/10C09J133/08B29C63/08C09J165/02H01B7/0241
Inventor I·奥克腾M·西伯特A·普伦泽尔S·佐尔纳
Owner TESA SE