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Epoxy toughening agent containing cage type silsesquioxane star block copolymer, and preparation method and application thereof

A technology of block polymers and siloxane-based stars, which is applied in the field of epoxy tougheners containing cage-shaped silsesquioxane-based star-shaped block polymers and its preparation, can solve the problem of affecting and toughening rings Oxygen resin transparency and other issues to achieve the effect of maintaining light transmittance

Active Publication Date: 2017-01-04
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods have a great impact on the transparency of the epoxy resin while toughening it.

Method used

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  • Epoxy toughening agent containing cage type silsesquioxane star block copolymer, and preparation method and application thereof
  • Epoxy toughening agent containing cage type silsesquioxane star block copolymer, and preparation method and application thereof
  • Epoxy toughening agent containing cage type silsesquioxane star block copolymer, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1: Preparation and Application of an Epoxy Toughener Containing Cage Silsesquioxane Star Block Polymer

[0062] (1) Synthesis of each component:

[0063] Methyl methacrylate was prepared into a chain by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70° C., and the reaction time was 3 h. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(MMA-b-St); its molecular weight is 6000.

[0064] Methoxypolyethylene glycol acrylate was prepared into chains by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70° C., and the reaction time was 3 h. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(PEGMEA-b-St); its molecular weight is 9000.

[0065] P(MMA-b-St) and P(PEGMEA-b-St) were desulfurized under the action of n-hexylamine to form thiol-terminated polymers (P(MMA-b-St)-SH, P(PEGMEA-b -St)-SH). ...

Embodiment 2

[0070] Example 2: Preparation and Application of an Epoxy Toughener Containing Cage Silsesquioxane Star Block Polymer

[0071] (1) Synthesis of each component:

[0072] Methyl methacrylate was prepared into chains by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70°C, and the reaction time was 4h. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(MMA-b-St); its molecular weight is 7000.

[0073] The methoxypolyethylene glycol acrylate was prepared into chains by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70° C., and the reaction time was 4 hours. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(PEGMEA-b-St); its molecular weight is 11,000.

[0074] P(MMA-b-St) and P(PEGMEA-b-St) were desulfurized under the action of n-hexylamine to form thiol-terminated polymers (P(MMA-b-St)-SH, P(PEGMEA-b -St)-...

Embodiment 3

[0079] Example 3: Preparation and Application of an Epoxy Toughener Containing Cage Silsesquioxane Star Block Polymer

[0080] (1) Synthesis of each component:

[0081]Methyl methacrylate was prepared into chains by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70°C, and the reaction time was 5 hours. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(MMA-b-St); its molecular weight is 8000.

[0082] The methoxypolyethylene glycol acrylate was prepared into chains by RAFT polymerization, under standard living polymerization conditions, the reaction temperature was 70° C., and the reaction time was 5 h. Then block styrene under the same conditions, and the reaction time is 1h to obtain P(PEGMEA-b-St); its molecular weight is 12,000.

[0083] P(MMA-b-St) and P(PEGMEA-b-St) were desulfurized under the action of n-hexylamine to form thiol-terminated polymers (P(MMA-b-St)-SH, P(PEGMEA-b -St)-...

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Abstract

The invention belongs to the technical field of preparation of toughening agents, and discloses an epoxy toughening agent containing a cage type silsesquioxane star block copolymer, and a preparation method and application thereof. The toughening agent comprises four components: (1) a linear block copolymer P (MMA-b-St); (2) a linear block copolymer P (PEGMEA-b-St); (3) a cage type silsesquioxane T8 star-shaped copolymer M-T8-P, wherein x is not smaller than 1 and is not greater than 7, y is not smaller than 1 and is not greater than 7, and z is not smaller than 6 and is not greater than 9; and (4) a cage type silsesquioxane T10 star-shaped copolymer M-T10-P, wherein x is not smaller than 1 and is not greater than 9, y is not smaller than 1 and is not greater than 9, z is not smaller than 6 and is not greater than 9, m1 is not smaller than 10 and is not greater than 80, n is not smaller than 1 and is not greater than 10, and m2 is not smaller than 10 and is not greater than 40. The toughening agent is a reactive toughening agent and generates multiple reactions in the toughening of epoxy resin to realize a toughening effect; and the proportions of compatible and incompatible chain segments in the polymer are adjusted to keep the transmissivity while ensuring the toughening effect.

Description

technical field [0001] The invention belongs to the technical field of toughening agent preparation, and in particular relates to an epoxy toughening agent containing a cage-shaped silsesquioxane group star-shaped block polymer, a preparation method and application thereof. Background technique [0002] The first generation of toughening agent is the reaction of nitrile rubber and epoxy resin to make carboxyl-containing toughening agent. The reaction can absorb the external impact well and achieve the toughening effect. The second-generation toughening agent is pre-mixed with nano-core-shell structure styrene-butadiene rubber and epoxy resin, and undergoes grafting reaction. Compared with the sea-island structure, the special core-shell structure can disperse more fully when absorbing the impact of internal stress and external force, so it can achieve a good toughening effect, and at the same time, it does not reduce the glass transition temperature of the adhesive and does...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L83/10C08L53/00C08G77/442
CPCC08G77/442C08L63/00C08L2201/08C08L2201/10C08L2205/025C08L2205/035C08L83/10C08L53/00
Inventor 许凯高树曦彭军邢玉秀任圆圆梁晟源桂雪峰陈鸣才
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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