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A transparent bifunctional epoxy resin-silicone rubber block network material

An epoxy resin and silicone rubber technology, which is applied in the field of transparent bifunctional epoxy resin-silicone rubber block network materials, can solve the problems of opaqueness of silicone rubber materials, little improvement in material properties, and decrease in elongation at break.

Active Publication Date: 2021-08-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large difference in solubility parameters between epoxy resin and silicone rubber, the compatibility between the two is extremely poor. Directly blending the two will cause macroscopic phase separation, resulting in little improvement in material performance and loss of material transparency.
[0005] For example, the patent with the application number 201510790367.2 and the invention name "Bisphenol A epoxy resin modified room temperature vulcanized silicone rubber and its preparation method" discloses a bisphenol A epoxy resin modified silicone rubber, which effectively improves the The strength and bonding performance of the material have been improved, but the elongation at break of the material has decreased, and the modified silicone rubber material has become opaque. to be further improved

Method used

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  • A transparent bifunctional epoxy resin-silicone rubber block network material
  • A transparent bifunctional epoxy resin-silicone rubber block network material
  • A transparent bifunctional epoxy resin-silicone rubber block network material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The synthesis of embodiment 1, difunctional epoxy resin DABPA

[0041]

[0042] DABPA

[0043] 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, ...

Embodiment 2

[0044] Embodiment 2, preparation of transparent bifunctional epoxy resin-silicone rubber block network material of the present invention

[0045] According to the feed ratio shown in Table 1, the invented transparent bifunctional epoxy resin-silicone rubber block network materials DADGEBA-1p, DADGEBA-3p, DADGEBA-5p, DADGEBA-10p were prepared. Specific steps are as follows:

[0046]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 transparent bifunctional epoxy resin-silicone rubber block network material is obtained.

...

experiment example 1

[0054] Experimental Example 1, Structural Characterization of Difunctional Epoxy Resin

[0055] (1) Experimental method

[0056] The bifunctional epoxy resin DABPA prepared in Example 1 was characterized by infrared, proton nuclear magnetic spectrum and carbon nuclear magnetic spectrum respectively.

[0057] (2) Experimental results

[0058] 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 transparent block network epoxy resin-silicone rubber modified material with excellent comprehensive performance, which is prepared from the following raw materials in parts by weight: 100.00 parts of silicone rubber, 1.00 to 1.00 parts of bifunctional epoxy resin 20.00 parts, 3.00-50.00 parts of hydrogen-containing silicone oil, 0-1.00 parts of rubber additive, wherein the bifunctional epoxy resin contains both epoxy groups and vinyl groups. The epoxy-silicone rubber modified material of the present invention has obvious improvement in tensile strength, elongation at break, and bonding performance compared with pure silicone rubber, and maintains the transparent performance of silicone rubber. 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. Prospects are excellent.

Description

technical field [0001] The invention belongs to the field of polymer modified materials, in particular to a transparent bifunctional epoxy resin-silicone rubber block network material. Background technique [0002] Silicone rubber is a polymer elastic material whose molecular chain has both inorganic and organic properties. Due to the particularity of its structure and composition, silicone rubber materials have many excellent properties that other materials cannot have at the same time, such as excellent high and low temperature resistance, good transparency, excellent oil resistance, solvent resistance, UV resistance, and radiation resistance. , excellent electrical insulation and chemical stability and physiological inertness and other advantages, has been widely used in aviation, aerospace, electrical and electronic, mechanical equipment, biomedicine and organic coating industries and other fields. In recent years, silicone rubber has also been widely used in optical fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08L63/00
CPCC08L83/04C08L2205/025C08L2205/03C08L63/00
Inventor 邹华维汪远陈洋梁梅
Owner SICHUAN UNIV
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