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UV/moisture dual-curing organic silicon resin composition with excellent weather resistance and preparation method thereof

A technology of resin composition and organosilicon, which is applied in the field of organosilicon materials, can solve problems such as limiting the downstream production capacity of organosilicon materials, and achieve enhanced high temperature resistance and weather resistance, improved weather resistance, improved water resistance and high temperature resistance stability Effect

Active Publication Date: 2019-12-24
德邦(昆山)材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common curing methods of silicone materials are high temperature curing or moisture curing, which limits the application of silicone materials and the improvement of downstream production capacity to a certain extent

Method used

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  • UV/moisture dual-curing organic silicon resin composition with excellent weather resistance and preparation method thereof
  • UV/moisture dual-curing organic silicon resin composition with excellent weather resistance and preparation method thereof
  • UV/moisture dual-curing organic silicon resin composition with excellent weather resistance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A UV / moisture dual-curing silicone resin composition with excellent weather resistance, its components include, in parts by weight, silicone resin A 50g, polydimethylsiloxane (1000mPa .s) 30g, organosilicon crosslinking agent (1) 3g, photoinitiator 1-hydroxy-cyclohexylbenzophenone 1.5g and tetraisopropyl titanate 2g.

[0025] Wherein, the preparation method of the silicone resin A is: add 221.6g self-made (MeSiO 3 / 2 ) 0.66 (Me 3 SiO 1 / 2 ) 0.17 (ViMe 2 SiO 1 / 2 ) 0.17Vinyl silicone resin and 0.5g of a catalyst with a Pt content of 5000ppm, heated up to 50°C and stirred for 30 minutes, then added 83g of hydrogen-containing double caps, heated up to 80°C, stirred for 2 hours, then vacuumed for 1 hour to remove excess Hydrogen double capping; then add 71g of allyl methacrylate to the system, and keep it warm for 3 hours to obtain 368.8g of colorless and transparent silicone resin A with high photosensitive reactivity.

[0026] Among them, the vinyl silicone resin (Me...

Embodiment 2

[0030] A UV / moisture dual-curing silicone resin composition with excellent weather resistance, its components include, in parts by weight, silicone resin A 90g, polydimethylsiloxane (100000mPa .s) 50g, silicone crosslinking agent (two) 10g, photoinitiator 2,4,6-trimethylbenzoyl-ethoxy-phenylphosphine oxide 3g, dibutyltin dilaurate 0.2g and titanium 0.5 g of n-butyl ester.

[0031] Wherein, the preparation method of the silicone resin A is: add 267g homemade (Ph 2 SiO 2 / 2 ) 0.47 (Me 2 SiO 2 / 2 ) 0.48 (ViMe 2 SiO 1 / 2 ) 0.05 Vinyl silicone oil and 0.5g of a catalyst with a Pt content of 5000ppm, heat up to 50°C and stir for 30 minutes, then add 15g of hydrogen-containing double head, heat up to 80°C, stir for 2 hours, then vacuumize for 1 hour to remove excess hydrogen Double caps; then add 17g of 2-allyloxy ethyl methacrylate to the system, and keep it warm for 3 hours to obtain 297.5g of colorless and transparent silicone resin A with high photosensitive reactivity.

...

Embodiment 3

[0035] A UV / moisture dual-curing silicone resin composition with excellent weather resistance, its components include, in parts by weight, silicone resin A30g, polydimethylsiloxane (500mPa. s) 10g, silicone crosslinking agent (3) 3g, photoinitiator 2-hydroxy-2-methyl-phenylacetone 2g and triethanolamine zirconium complex 2.5g.

[0036] Wherein, the preparation method of the silicone resin A is: add 338g self-made (CySiO 3 / 2 ) 0.35 (PhMeSiO 2 / 2 ) 0.35 (MeViSiO 2 / 2 ) 0.1 (ViMe 2 SiO 1 / 2 ) 0.1 (Me 3 SiO 1 / 2 ) 0.1 Vinyl silicone resin and 0.7g catalyst with a Pt content of 5000ppm, heated up to 50°C and stirred for 30 minutes, then added 88g of hydrogen-containing double-capped heads, heated up to 80°C, stirred for 2 hours, then vacuumed for 1 hour to remove excess Hydrogen double capping; then add 67.2g of vinyl methacrylate to the system, and keep it warm for 3 hours to obtain 486.3g of colorless and transparent silicone resin A with high photosensitive reactivity.

...

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Abstract

The invention belongs to the technical field of organic silicon materials, and particularly relates to a UV / moisture dual-curing organic silicon resin composition with excellent weather resistance anda preparation method thereof. In the silicone resin composition, the preparation of the organic silicon resin A with high photosensitive reaction activity adopts a hydrosilylation mode, so that firstly, the preparation of products with different structures and viscosities can be realized, and secondly, the introduction of easily hydrolyzable groups and acid-base catalysts is avoided, the water resistance and high temperature resistance stability of the resin are improved, and the high temperature resistance and weather resistance of the formula are enhanced. The curing mode is dual curing, arapid free radical curing cross-linking reaction can be carried out in the presence of ultraviolet light, and the effect of rapid shaping is achieved. Meanwhile, moisture curing can be carried out, and the purpose of complete curing of the shadow or the part, difficult to carry out UV irradiation curing, of the bottom layer part can be achieved through moisture curing.

Description

technical field [0001] The invention belongs to the technical field of organic silicon materials, and in particular relates to a UV / moisture dual-curing organic silicon resin composition with excellent weather resistance and a preparation method thereof. Background technique [0002] UV curing materials have the advantages of fast curing, energy saving, room temperature curing, and less pollution, and are more and more favored by all walks of life. Commonly used UV curing materials are generally acrylic resins, which have excellent UV reactivity, and can be made into various materials with different hardness and elasticity according to different application requirements, and have a wide range of market applications. However, due to the limitations of the material itself, traditional acrylate materials are prone to oxidative cracking when exposed to 120°C or above for a long time, resulting in attenuation of material properties, so it is difficult to use in harsh environments...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/04C08K5/5425C08G77/38
CPCC08G77/38C08L83/06C08L2205/02C08L83/04C08K5/5425
Inventor 姜云王建斌陈田安
Owner 德邦(昆山)材料有限公司