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Two-component (2k) curable composition

A composition, two-component technology, used in non-polymer organic compound adhesives, adhesive types, ester copolymer adhesives, etc., to solve problems such as the inability of bonded joints to withstand heavy loads

Pending Publication Date: 2022-07-08
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, bonded joints formed by said adhesives cannot withstand heavy loads: this is clearly detrimental, since structural adhesives, by definition, become part of the component when the substrates they bond are affected or the stress reaches yield should not fail at point

Method used

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  • Two-component (2k) curable composition
  • Two-component (2k) curable composition
  • Two-component (2k) curable composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0178] In an exemplary embodiment of the present invention, the two-component (2K) composition comprises:

[0179] (A) a first component comprising:

[0180] 90 to 99% by weight, based on the weight of component (A), of i) the at least one cyanoacrylate monomer represented by formula 1:

[0181] H 2 C═C(CN)—COOR(1)

[0182] where: R is selected from C 1 -C 12 Alkyl, C 3 -C 12 Cycloalkyl and C 3 -C 12 allyl;

[0183] 0.1 to 10% by weight, based on the total weight of the composition, of ii) a peroxide catalyst; and,

[0184] 0.01 to 10% by weight, based on the total weight of the composition, of iii) at least one curing accelerator for the at least one cyanoacrylate monomer i);

[0185] (B) a second component comprising:

[0186] 40 to 95% by weight, based on the weight of component (B), of i) at least one free-radically curable unsaturated polyester polymer (UPS), wherein the unsaturated polyester (UPS) comprises C 5 to C 8 a cyclic moiety, substantially free of s...

Embodiment 1

[0212] Components A and B were prepared by mixing the ingredients according to Table 1 below:

[0213] Table 1 Component (A)

[0214]

[0215] Component (B)

[0216]

[0217] Equal amounts by weight of the components were charged into separate compartments of a 50 g cartridge and sealed at both ends. The barrel is then loaded into the barrel gun with a mixing tip installed on the front end. The two components were pushed into the mixing tip by applying constant pressure on the trigger to ensure thorough mixing prior to application to the substrate.

[0218] The substrates were abraded aluminum and GMBS duroplastic each with a thickness of 0.1 inches. The substrate was cut to a size of 2.5cmx10cm (1"x4") for tensile testing.

[0219] Standard Test Method for Determining Strength of Adhesively Bonded Rigid Plastic Lap-Shear Joints at room temperature based on ASTM D 3163-01 - Standard Test Method for Determining Strength of Adhesively Bonded Rigid Plastic Lap-Shear J...

Embodiment 2

[0232] This example investigates the inclusion of acrylate monomers in component (B). In this context, components (A) and (B) are prepared by mixing the ingredients according to Table 4 below:

[0233] Table 4 Component (A)

[0234]

[0235] Component (B)

[0236]

[0237] Equal amounts by weight of the components were charged into separate compartments of a 50 g cartridge and sealed at both ends. The barrel is then loaded into the barrel gun with a mixing tip installed on the front end. The two components are pushed into the mixing tip by applying constant pressure on the trigger to ensure thorough mixing prior to application to the substrate.

[0238] The substrates were abraded aluminum and GMBS rigid plastic each with a thickness of 0.1 inches. The substrate was cut to a size of 2.5cmx10cm (1"x4") for tensile testing.

[0239] The results of the above performance tests are given in Table 5 below.

[0240] table 5

[0241]

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Abstract

The present invention provides a two-component (2K) curable composition comprising: (A) a first component comprising: i) at least one cyanoacrylate monomer represented by Formula 1: H2CH C (CN)-COOR (1) wherein: R is selected from the group consisting of a C1-C18 alkyl group, a C3-C18 cycloalkyl group, a C2-C15 alkenyl group, a C6-C18 aryl group, a C7-C15 aralkyl group, and a C3-C15 allyl group; and ii) a peroxide catalyst; and iii) at least one curing accelerator for the at least one cyanoacrylate monomer i); (B) a second component comprising: i) at least one radically curable compound; and ii) at least one transition metal compound wherein, when the components are mixed together, the peroxide catalyst initiates curing of the at least one radically curable compound and the at least one transition metal compound initiates curing of the at least one cyanoacrylate monomer, and further wherein the at least one radically curable compound comprises at least one unsaturated polyester polymer containing at least two cycloolefinic double bonds.

Description

technical field [0001] The present invention relates to two-component (2K) curable compositions based on cyanoacrylate monomers. [0002] More specifically, the present invention relates to a two-component (2K) radically curable composition comprising at least one cyanoacrylate monomer in a first component and at least one cyanoacrylate monomer in a second component. An unsaturated polyester. Background technique [0003] When assembling structures using adhesives, it can be challenging to determine the appropriate composition that provides the required bond strength and fixation speed to facilitate production. While some adhesives provide a strong structural bond, they take hours to set and require the parts to be stored until they reach a strength suitable for handling. Conversely, compositions that provide the fastest cure may not be able to withstand the load or withstand thermal or mechanical stress. [0004] Curable cyanoacrylate compositions are known for their abi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/01
CPCC09J4/06C08F283/01C09J167/06C08G63/553C08F222/322C08F220/20C08F230/02C08F220/46C08F222/32C08F4/34C09J7/10C09J2301/408C08K3/10C08K3/36C09J133/14
Inventor N·塔莱K·特里维迪J·P·沙阿
Owner HENKEL KGAA