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Special-type reinforcing silicon resin for 3D printing and preparation method thereof

A silicone resin, a special technology, applied in the field of 3D printing special reinforced silicone resin and its preparation, can solve the problems of low mechanical strength, high yield, slow curing rate, etc., and achieve small shrinkage, high mechanical strength, Effect of High Cure Rate

Inactive Publication Date: 2015-01-14
卢儒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Urethane acrylate, oxyacrylate, unsaturated polyester resin, etc. are usually used in the prior art. These resins generally have the defects of slow curing rate, high yield and low mechanical strength of the cured material.

Method used

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  • Special-type reinforcing silicon resin for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Tetraethoxysilane, vinyl double-caps and water according to the mass ratio (that is, 100 parts of tetraethoxysilane, 20 parts of vinyl double-caps and 10 parts of deionized water), under the action of acid or alkali catalyst , polymerized at 8°C for 12 hours, and removed the catalyst after the polymerization to obtain hydroxyl-terminated vinyl polysiloxane. Then, add KH550, accounting for 0.5% by mass of the hydroxyl-terminated vinyl polysiloxane, to the hydroxyl-terminated vinyl polysiloxane to cause polycondensation reaction to obtain a silicone resin. Finally, add organotin or titanate catalysts to the silicone resin, stir evenly, and slowly add bisphenol A epoxy resin (one or more mixtures of E20, E44, E51, E54) Toluene solution (epoxy solid content 50%, silicone, epoxy resin and toluene solution mass ratio 1:10:1), react at 90°C for 8 hours to obtain special reinforcing silicone resin.

Embodiment 2

[0028] Tetraethoxysilane, vinyl double-caps and water according to the mass ratio (that is, 100 parts of tetraethoxysilane, 40 parts of vinyl double-caps and 20 parts of deionized water), under the action of acid or alkali catalyst , polymerized at 12°C for 12 hours, and removed the catalyst after the polymerization to obtain hydroxyl-terminated vinyl polysiloxane. Then, KH550, accounting for 5% by mass of the hydroxyl-terminated vinyl polysiloxane, was added to the hydroxyl-terminated vinyl polysiloxane to cause polycondensation reaction to obtain a silicone resin. Finally, add organotin or titanate catalysts to the silicone resin, stir evenly, and slowly add bisphenol A epoxy resin (one or more mixtures of E20, E44, E51, E54) The toluene solution slowly adds bisphenol A epoxy resin (one or more mixtures in E20, E44, E51, E54) toluene solution (50% epoxy solid content, organic silicon, epoxy resin and toluene solution quality is 1:100:1), reacted at 110°C for 4 hours to obta...

Embodiment 3

[0030] Tetraethoxysilane, vinyl double-head and water according to the mass ratio (that is, 100 parts of tetraethoxysilane, 30 parts of vinyl double-head and 15 parts of deionized water), under the action of acid or alkali catalyst , polymerized at 10°C for 6 hours, and removed the catalyst after the polymerization to obtain hydroxyl-terminated vinyl polysiloxane. Then, KH550, accounting for 2.5% of the mass of the hydroxyl-terminated vinyl polysiloxane, was added to the hydroxyl-terminated vinyl polysiloxane to cause a polycondensation reaction to obtain a silicone resin. Finally, add organotin or titanate catalysts to the silicone resin, stir evenly, and slowly add bisphenol A epoxy resin (one or more mixtures of E20, E44, E51, E54) Toluene solution (epoxy solid content 50%, the ratio of silicone to epoxy is 1:55:1), react at 100°C for 6 hours to obtain special reinforcing silicone resin.

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Abstract

The invention discloses a special-type reinforcing silicon resin for 3D printing and a preparation method thereof. The special-type reinforcing silicon resin is prepared from an organic silicon resin and an epoxy resin in a mass ratio of 1:(10-100), wherein the organic silicon resin is prepared from hydroxyl-terminated vinyl polysiloxane and amino-terminated siloxane which accounts for not more than 5 wt% of the hydroxyl-terminated vinyl polysiloxane; and the hydroxyl-terminated vinyl polysiloxane is prepared from alkoxy siloxane and vinyl-terminated siloxane which accounts for 20-40 wt% of the alkoxy siloxane. The alkoxy siloxane and vinyl-terminated siloxane are subjected to polycondensation reaction to obtain the hydroxyl-terminated vinyl polysiloxane, the hydroxyl-terminated vinyl polysiloxane reacts with the amino-terminated siloxane to obtain the organic silicon resin, and the organic silicon resin is active amino-terminated polysiloxane and can be completely crosslinked with the epoxy resin, thereby obtaining the reinforcing silicon resin modified epoxy resin composite material. The composite material has the advantages of higher curing rate, lower shrinkage and higher mechanical strength.

Description

technical field [0001] The invention relates to the technical field of silicone resin materials, in particular to a special reinforced silicone resin for 3D printing and a preparation method thereof. Background technique [0002] 3D printing manufacturing technology is an interdisciplinary technology, which mainly consists of three parts: equipment, software, and materials, among which printing materials are an indispensable link. But now the industry mainly studies equipment and software, and does not pay enough attention to material research. Material bottlenecks have become the primary problem limiting the development of 3D printing. 3D printing materials mainly include metal materials, inorganic non-metallic materials and organic polymer materials. This project mainly studies organic polymer materials. The existing 3D printing polymer materials have the disadvantages of insufficient strength and toughness after molding. Therefore, companies and universities engaged in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08G77/388C08G77/06
Inventor 卢儒
Owner 卢儒