A kind of preparation method and application of transparent epoxy resin-silicone rubber modified material

A technology of epoxy resin and modified materials, applied in epoxy resin glue, epoxy resin coating, adhesive and other directions, can solve the problem of limited improvement in material strength, and achieve the effect of excellent mechanical properties and wide application range.

Active Publication Date: 2021-08-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the improvement of the material strength is limited, and the obtained modified silicone rubber material is milky white and opaque.

Method used

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  • A kind of preparation method and application of transparent epoxy resin-silicone rubber modified material
  • A kind of preparation method and application of transparent epoxy resin-silicone rubber modified material
  • A kind of preparation method and application of transparent epoxy resin-silicone rubber modified material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The synthesis of embodiment 1, difunctional epoxy resin DABPA

[0055]

[0056] Solid alkali method: add epichlorohydrin (ECH, 1mol), diallyl bisphenol A (DADGEBA, 0.1mol), tetramethylammonium bromide (0.006mol) into a three-necked flask together, and stir at 100°C Reaction 2h. Then lower the temperature to 85°C, add 0.2mol sodium hydroxide solid, react at 85°C for 2h, and then use a rotary evaporator to distill off excess epichlorohydrin under reduced pressure. Pour the reaction solution into a separatory funnel, add an appropriate amount of 50mL xylene to dissolve the crude product, wash it with deionized water, remove the lower water layer, add 5% sodium hydroxide solution to the crude product, and react at 85°C for 2 hours. Hydrolyze chlorine, remove the water layer, check the acidity and alkalinity with ph test paper, then neutralize the organic phase with 2% sodium dihydrogen phosphate to neutrality, wash with water and remove the water layer, and finally remo...

Embodiment 2

[0057] Embodiment 2, the preparation of bifunctional epoxy resin-silicone rubber block network material of the present invention

[0058] According to the feed ratio shown in Table 1, the invented bifunctional epoxy resin-silicone rubber block network materials DADGEBA-1p, DADGEBA-3p, DADGEBA-5p, DADGEBA-10p were prepared. Specific steps are as follows:

[0059] Add the difunctional epoxy resin DABPA prepared in Example 1 into the silicone rubber, stir at 80°C for 1h, and after cooling to room temperature, add hydrogen-containing silicone oil (HS), catalyst (Pt) and catalytic retarder 2-methyl -3 butyne-2 alcohol (MBO), after stirring at room temperature for 15 minutes, remove air bubbles in vacuum for 10 minutes, then pour into the mold, and follow the conditions of 2 hours at 90°C, 2 hours at 120°C, 2 hours at 140°C, and 2 hours at 180°C After curing, the inventive bifunctional epoxy resin-silicone rubber block network material is obtained.

[0060] from Figure 10 It can...

experiment example 1

[0067] Experimental Example 1, Structural Characterization of Difunctional Epoxy Resin

[0068] (1) Experimental method

[0069] The bifunctional epoxy resin DABPA prepared in Example 1 was characterized by infrared, hydrogen nuclear magnetic spectrum and carbon nuclear magnetic spectrum respectively.

[0070] (2) Experimental results

[0071] The result is as Figure 1-3 shown. In the infrared spectrum ( figure 1 ), the hydroxyl peak of DADGEBA disappeared obviously, 850,914cm -1 The peak of the epoxy group at 723cm -1 The peak of carbon-chlorine bond disappeared, indicating that diallyl bisphenol A reacted with epichlorohydrin. In the H NMR and C NMR spectra ( figure 2 , image 3 ), the corresponding peaks of each hydrogen atom and carbon atom in DABPA can also be found respectively. The above results illustrate that the present invention has successfully prepared the difunctional epoxy resin DABPA.

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Abstract

The invention provides a preparation method and application of an epoxy resin-silicone rubber block network modified material with excellent comprehensive performance, wherein the preparation method comprises the following steps: (1) adding a difunctional epoxy resin to a silicone rubber matrix , heat and stir to obtain a uniformly mixed rubber; (2) add hydrogen-containing silicone oil and rubber additives, and stir at room temperature; (3) after stirring evenly, remove air bubbles in a vacuum, and solidify to obtain the product. The epoxy-silicone rubber modified material prepared by the method of the present invention has obvious improvement in tensile strength, elongation at break, and bonding performance compared with the pure sample, and maintains the transparent performance of silicone rubber, so it can not only be used in aerospace High-temperature-resistant coatings, adhesives, potting compounds, rubber, and flexible ablation-resistant substrate materials in the fields of electronic information, mechanical equipment, etc., can also be used in solar panel transparent coatings, LED packaging materials, etc. The application prospect is very good.

Description

technical field [0001] The invention belongs to the field of polymer modified materials, and in particular relates to a preparation method and application of a novel bifunctional epoxy resin-silicone rubber block network material. Background technique [0002] Silicone rubber is a polymer elastic material with both inorganic and organic molecular chains. It has unique comprehensive properties, such as high and low temperature resistance, low pressure compression set, hydrophobicity, transparency, weather resistance, ozone aging resistance, etc. At present, it has been widely used in aviation, aerospace, artificial intelligence, biomedicine, electrical and electronic, mechanical equipment and organic coating industry and other fields. Recently, silicone rubber has also been widely used in optical fields such as LED packaging materials and solar panel transparent coatings because of its transparency. However, due to the lack of polar groups in the silicone rubber matrix, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L63/00C08L83/05C09D183/04C09D163/00C09J183/04C09J163/00
CPCC08L83/04C08L2201/08C08L2201/10C08L2203/206C08L2205/025C08L2205/03C09D5/18C09D183/04C09J183/04C08L63/00
Inventor 邹华维汪远陈洋梁梅
Owner SICHUAN UNIV
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