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Preparation method of UV (ultraviolet) moisture dual-curable modified organic silicone polymer

A dual-curing, polymer technology used in adhesives and other directions to achieve high adhesion, soft film and high reliability

Inactive Publication Date: 2018-09-14
深圳市库泰克电子材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

without any surface pretreatment

Method used

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  • Preparation method of UV (ultraviolet) moisture dual-curable modified organic silicone polymer
  • Preparation method of UV (ultraviolet) moisture dual-curable modified organic silicone polymer

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Experimental program
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Embodiment 1

[0021] Vinyl-terminated polydimethylsiloxane polymer is prepared by the following steps: Dissolve 5.68 dihydroxymethacrylic acid with 5g of dimethylformamide, place it in a three-necked flask, and add 1 mole of silanol to seal The end polydimethylsiloxane (viscosity 1000 centipoise, molecular weight 25000) and 2.2 moles of ethyl aminopropyl trimethoxysilane and 0.05 g of bismuth octoate were condensed in a vacuum for 5 hours to remove the by-products of methanol. . Then add a certain stoichiometric amount of 2-isocyanatoethyl methacrylate, and stir under nitrogen for 30 minutes to obtain a polydimethylsiloxane oligomer with vinyl end groups. Isobornyl acrylate monomer (IBX-A) for the oligomer obtained above, photoinitiator, dibutyltin dilaurate (DBTDL) moisture curing catalyst, methyltrimethoxysilane dehydrating agent and radical polymerization inhibitor Stir in a nitrogen atmosphere to obtain the adhesive. The formula table is as follows:

[0022]

[0023]

Embodiment 2

[0025] Dissolve 2.68 dihydroxymethacrylic acid with 3g dimethylformamide, place it in a three-necked flask, add 0.5 moles of silanol-terminated polydimethylsiloxane (viscosity 2000 cps, molecular weight 26000) and 1.2 moles Butyl-substituted aminopropyltrimethoxysilane and 0.02g bismuth octoate were condensed in vacuum for 3 hours to remove the by-products of methanol. Then a certain stoichiometric amount of 2-isocyanatoethyl methacrylate was added, and Under the condition of nitrogen filling, under stirring for 60 minutes, a polydimethylsiloxane oligomer with vinyl end groups is obtained. The oligomer obtained above is used with isobornyl acrylate monomer (IBX-A), light Initiator, dibutyltin dilaurate (DBTDL) moisture curing catalyst, methyltrimethoxysilane dehydrating agent and free radical polymerization inhibitor are stirred under nitrogen atmosphere to obtain the adhesive. The formula table is as follows:

[0026] Component weight

Embodiment 3

[0028] Use 6g of dimethylformamide to dissolve 3-dihydroxymethacrylic acid, place it in a three-necked flask, add 0.5 moles of silanol-terminated polydimethylsiloxane (viscosity 1500 centipoise, molecular weight 15000) and 10.8 moles Butyl-substituted aminopropyltrimethoxysilane and 0.06g of bismuth octoate were condensed in a vacuum for 2 hours to remove the by-products of methanol. Then a certain stoichiometric amount of 2-isocyanatoethyl methacrylate was added, and Under the condition of nitrogen filling, under stirring for 60 minutes, a polydimethylsiloxane oligomer with vinyl end groups is obtained. The oligomer obtained above is used with isobornyl acrylate monomer (IBX-A), light Initiator, dibutyltin dilaurate (DBTDL) moisture curing catalyst, methyltrimethoxysilane dehydrating agent and free radical polymerization inhibitor are stirred under nitrogen atmosphere to obtain the adhesive. The formula table is as follows:

[0029] Component weight

F-1

F-2

F-3

F-4

F-5

F-6

F-7

Ol...

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Abstract

The invention discloses a preparation method of a UV (ultraviolet) moisture dual-curable modified organic silicone polymer. The preparation method includes the steps: performing condensation reactionon silanol-terminated polydimethylsiloxane and R1 substituted amino propyl trimethoxy silane under catalysis of bismuth octoate in vacuum at room temperature; adding a certain stoichiometric amount ofmethacrylic acid 2-isocyanato ethyl ester; performing stirring under the condition of nitrogen filling. The preparation method overcomes the shortcoming of high curing energy of current existing products and solves the problem that a traditional UV glue shaded area cannot be cured due to absence of illumination. Cured volume shrinkage is smaller than 0.5%, the problem of cracking of pulled thin plastic films due to over-high shrinkage is avoided, the polymer has performance indexes including yellowing index smaller than 0.5, bonding strength higher than 2MPa and refractive index of 1.49-1.51,a glue film is soft, elastic and low in hardness of Shore A15-20, shrinkage glue fault is not easily caused, and reliability is high.

Description

Technical field [0001] The invention relates to the technical field of organic polymers, in particular to a preparation method of a modified silicone polymer capable of UV moisture dual curing. Background technique [0002] With the continuous development of materials, engineering plastics have gradually become a substitute for display screens, because compared with glass substrates, the cost of the production and processing of the plastic substrate itself is lower than that of the glass substrate, and the plastic it uses The film is 40 times lighter than the latter, and polyethylene, polypropylene and poly(ethylene terephthalate) are the most widely used plastics in modern society. Because these materials are environmentally friendly and recyclable, they are more Widespread concern often requires assembly or bonding of these plastics. However, due to their low surface energy, low polarity and few or no pores, it is difficult to bond through adhesives to improve the adhesion of ...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F220/18C09J183/07
CPCC08F290/068C09J183/04C08F220/1812
Inventor 何素敏
Owner 深圳市库泰克电子材料技术有限公司
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