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Radiation-activatable pressure-sensitive adhesive tape having a dark reaction and use thereof

A dark reaction, tape technology, applied in the field of onium-containing initiators, can solve problems affecting the properties of the final bond

Active Publication Date: 2018-11-23
TESA SE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For bonds with high strength, minimal added levels of adhesives such as "reaction modifiers" are desirable as they control open time but may also adversely affect the properties of the final bond

Method used

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  • Radiation-activatable pressure-sensitive adhesive tape having a dark reaction and use thereof
  • Radiation-activatable pressure-sensitive adhesive tape having a dark reaction and use thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] In the preparation of polyurethane polymers, the molar ratio of isocyanate groups to isocyanate-reactive groups is, for example, ≧0.90 to ≦3. In the context of the present invention, OH-functional or isocyanate-functional polyurethane polymers can be used. Functionality can be controlled by adjusting the molar ratio of isocyanate groups to isocyanate-reactive groups.

[0062]The extent of the reaction is typically monitored by tracking the NCO content of the reaction mixture. For this purpose, spectroscopic measurements, such as infrared or near-infrared spectroscopy, determination of the refractive index or chemical analyzes of the collected samples, such as titrations, can be carried out. The polyurethane polymers comprising free isocyanate groups are obtained in pure form or in solution.

[0063] In an advantageous improvement of the adhesive tape of the invention, the weight average molecular weight M of the polyurethane polymer of the film former component A w A...

Embodiment

[0181] testing method

[0182] viscosity

[0183] The fluidity of fluid coating materials is determined by dynamic viscosity. In the present case, the dynamic viscosity is determined in a cylindrical motor viscometer with standard geometry according to DIN 53019-1 (2008-09). Viscosity measured at temperature of 25°C and 1×s -1 measured at a shear rate. Fluid refers to a substance with a viscosity less than 500 Pa·s.

[0184] Molecular weight:

[0185] Number average molecular weight M n and weight average molecular weight M w The molecular weight was determined by gel permeation chromatography (GPC). The eluent used was THF (tetrahydrofuran) containing 0.1% by volume of trifluoroacetic acid. The measurement temperature was 25°C. The pre-column used was PSS-SDV, 5 μ, ID 8.0mm x 50mm. For the separation, the column used was PSS-SDV, 5μ, 10 3 and 10 5 and 10 6 , each with ID 8.0mm x 300mm. The sample concentration was 4 g / L and the flow rate was 1.0 mL per minute....

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PUM

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Abstract

The invention relates to a pressure-sensitive adhesive tape, containing or consisting of a radiation-activatable polymerizable composition containing or consisting of: A) 5 to 60 parts by weight of atleast one film-forming component; B) 40 to 95 parts by weight of at least one epoxide component; C) 0.1 to 10 parts by weight of at least one photoinitiator; and D) optionally 0.1 to 200 parts by weight of at least one additive, in each case with respect to the radiation-activatable polymerizable composition, wherein the parts by weight of components A and B add up to 100, characterized in that the film-forming component A comprises or consists of at least one polyurethane polymer. The invention further relates to a method for joining two components by means of such an adhesive tape and to the use of such an adhesive tape.

Description

[0001] The present invention relates to a pressure sensitive adhesive tape comprising or consisting of a radiation-activatable polymerizable composition comprising or consisting of: [0002] A 5 to 60 parts by weight of at least one film-forming agent component; [0003] B 40 to 95 parts by weight of at least one epoxy component; [0004] C 0.1 to 10 parts by weight of at least one photoinitiator, and [0005] D optionally 0.1 to 100 parts by weight of at least one additive, [0006] The parts by weight of components A and B add up to 100 in each case, based on the radiation-activatable polymerizable composition. The invention also relates to a method of connecting two components by means of such an adhesive tape and to the use of such an adhesive tape. Background technique [0007] The prior art discloses UV-curable adhesive tapes comprising, inter alia, epoxies. For example, EP 1 026 218 A1 discloses a UV-curable pressure-sensitive adhesive (PSA) tape which uses, inter a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J7/38C09J163/00C09J175/04
CPCC08L63/00C09J2463/00C09J2475/00C09J7/38C09J2301/416C08L75/04C09J7/25Y10T428/2896Y10T428/287C08K5/55
Inventor C.德马雷兹C.舒
Owner TESA SE
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