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Two-component (2K) composition based on modified epoxy resins

A technology of epoxy resin and composition, which is applied in the direction of epoxy resin coating, mechanical equipment, coating, etc., and can solve problems such as hindering the proper development of physical properties

Pending Publication Date: 2022-02-25
HENKEL KGAA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another problem with fast curing blend systems is that the catalytic reaction can promote gelation of the cured composition, which limits the molecular motion of the reactant (macro) monomers, thus hindering the proper development of the sought physical properties

Method used

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  • Two-component (2K) composition based on modified epoxy resins
  • Two-component (2K) composition based on modified epoxy resins
  • Two-component (2K) composition based on modified epoxy resins

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0150] In an exemplary embodiment of the invention, the two-component (2K) composition comprises:

[0151] (A) a first component comprising:

[0152] 10 to 60% by weight of a) at least one epoxy resin selected from the group consisting of glycidyl ethers of polyols and polyphenols; glycidyl esters of polycarboxylic acids; and epoxidized polyethylenically unsaturated hydrocarbons, esters , ethers and amides; and

[0153] 1 to 40% by weight of b) at least one elastomer-modified epoxy resin having an epoxy equivalent weight of 200 to 500 g / eq;

[0154] (B) a second component comprising:

[0155] c) a curing agent consisting of at least one compound having at least two epoxy-reactive groups per molecule, said curing agent being characterized in that it consists of 90 to 100 mole % of at least one alkoxy-containing Composed of an amino-functional silicone resin and 0 to 10% by weight of a second epoxy-reactive compound,

[0156] wherein the composition is characterized in that ...

Embodiment 1 to 6

[0192] The formulations given herein below in Table 1 were prepared by using dibutyltin dilaurate (DBTDL) as catalyst (comparative examples 1-2) and without catalyst (inventive examples 1-6). The amount of curing agent (Part B) varies in the examples given. In Table 1, the amount of Part A is given in grams (g) and the weight of Part B is given in grams per 100 grams of Part A.

[0193] Table 1

[0194]

[0195]

[0196] 1 Weight of HP 2000 for 100 g Part A

[0197] The stability of the stock coating compositions after storage at 50°C for 8 weeks was evaluated and reported herein below in Table 2.

[0198] The two parts (A, B) defined above were mixed and the resulting composition was evaluated for open time / tool ​​time and tack free time. After 24 hours of curing at room temperature, the coating thickness and performance were evaluated by pencil hardness testing, abrasion resistance and salt spray studies.

[0199] Table 2 : Test the performance properties of t...

Embodiment 7-10

[0210] The formulations given herein below in Table 3 were prepared by using dibutyltin dilaurate (DBTDL) as catalyst (comparative examples 3-4) and without catalyst (inventive examples 7-10). The amount of curing agent (Part B) varies in the examples given. In Table 3, the amount of Part A is given in grams (g) and the weight of Part B is given in grams per 100 grams of Part A.

[0211] table 3

[0212]

[0213]

[0214] 5 Indicates the weight of HP 2000 for 100 grams of Part A

[0215] The stability of the stock coating compositions after storage at 50°C for 8 weeks was evaluated and reported herein below in Table 4.

[0216] The two parts (A, B) defined above were mixed and the resulting composition was evaluated for open time / tool ​​time and tack free time. After 24 hours of curing at room temperature, the coating thickness and performance were evaluated by pencil hardness testing, abrasion resistance and salt spray studies. The results are also given in Table...

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Abstract

The present invention is directed to a two-component (2K) composition comprising: (A) a first component comprising: a) at least one epoxy resin different from said resin b); and, b) at least one elastomer modified epoxy resin; (B) a second component comprising: c) a curative which consists of at least one compound possessing at least two epoxide reactive groups per molecule, said curative being characterized by comprising at least one alkoxy-containing aminofunctional silicone resin, wherein said composition is characterized in that it is free of catalysts.

Description

technical field [0001] The present invention relates to a two-component (2K) composition based on modified epoxy resins. More specifically, the present invention relates to a two-component (2K) composition comprising as a first component a combination of epoxy resins and as a second component comprising at least one alkoxy-containing amino-functional organic Curing agent for silicone resins; the reaction of the two components of the composition provides a cured product exhibiting wear and corrosion resistance. Background technique [0002] Epoxy resins have a wide range of applications, primarily based on the fact that specific selection of resin and crosslinker (or curing agent) can allow the properties of the cured epoxy resin to be tuned to achieve specific performance characteristics. [0003] With that versatility recognized, properly cured epoxies have a variety of other positive attributes, including, among others: excellent chemical resistance, especially to alkalin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/50C08G77/26C08L63/00C08L83/04F16L59/00
CPCC08G59/50C08L63/00C08G77/26C08G77/10C08L83/00C08L2205/03C08L2312/00C09D163/00
Inventor M·帕特尔S·R·库切拉帕蒂J·P·沙阿D·塔瑟
Owner HENKEL KGAA
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