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A kind of product prepared by photocuring rapid prototyping process and its preparation method

A molding process and light-curing technology, which is applied in the field of 3D printing materials, can solve the problems that the performance cannot meet the development and demand of the market, the types of photosensitive resins are few, and the reaction is complicated. The effect of high physical strength

Inactive Publication Date: 2021-09-07
BEIJING HENGCHUANG ADVANCED MATERIALS & ADDITIVE MFG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The photosensitive resin has a low viscosity and is easy to spray, but the preparation of hyperbranched polycarbosilane uses chlorosilane as the starting material, which is highly corrosive, complex in reaction, and difficult to control
[0007] All in all, there are few types of photosensitive resins suitable for photocuring 3D printing technology at present, and the properties of various products prepared from them are difficult to meet the development and needs of the market

Method used

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  • A kind of product prepared by photocuring rapid prototyping process and its preparation method
  • A kind of product prepared by photocuring rapid prototyping process and its preparation method
  • A kind of product prepared by photocuring rapid prototyping process and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0056] Preparation of vinyl-containing polycarbosilane: Add dropwise a mixed solution of 5.67 g of chloromethyltriethoxysilane and 8 mL of tetrahydrofuran to 8.0 g of magnesium chips and 20 mL of tetrahydrofuran, and continue to drop 80.28 g of methyl chloride after triggering the Grignard reaction A mixed solution of triethoxysilane and 450mL tetrahydrofuran was incubated at 30°C for 6h. Continue to drop 98.58g of vinylmagnesium bromide in methyl tetrahydrofuran solution, keep the reaction at 30°C for 2h, then add 10.8g of lithium aluminum hydride, and continue to react at 30°C for 10h. After the reaction, the reaction solution was gradually added to a 3.0mol / L hydrochloric acid solution, stirred for 0.5 to 2 hours, then extracted with 200mL of hexane, the organic phase was separated and dried by adding anhydrous magnesium sulfate, filtered and rotary evaporated to obtain polycarbosilane. The polycarbosilane has a number average molecular weight of 670 g / mol, a weight averag...

Embodiment 2

[0060] Preparation of allyl-containing polycarbosilane: Add dropwise a mixed solution of 7.35 g of chloromethyltrimethoxysilane and 11 mL of tetrahydrofuran to 10.2 g of magnesium chips and 24 mL of tetrahydrofuran, and continue to drop 97.0 g of methyl chloride after triggering the Grignard reaction A mixed solution of trimethoxysilane and 500mL tetrahydrofuran was incubated at 45°C for 8h. Continue to add 135.87g of allylmagnesium bromide in methyl tetrahydrofuran solution dropwise, keep the reaction at 45°C for 6h, then add 19.5g of lithium aluminum hydride, and continue to react at 45°C for 10h. After the reaction, the reaction solution was gradually added to a 3.0mol / L hydrochloric acid solution, stirred for 0.5 to 2 hours, then extracted with 240mL of hexane, the organic phase was separated and dried by adding anhydrous magnesium sulfate, filtered and rotary evaporated to obtain based polycarbosilane. The polycarbosilane has a number average molecular weight of 490 g / mo...

Embodiment 3

[0064] Preparation of isopropenyl-containing polycarbosilane: Add dropwise a mixed solution of 12.66 g of chloromethyltriethoxysilane and 20 mL of tetrahydrofuran to 17.5 g of magnesium chips and 42 mL of tetrahydrofuran, and continue to drop 186.0 g of chlorine after the Grignard reaction is initiated. A mixed solution of methyltriethoxysilane and 700mL tetrahydrofuran was incubated at 45°C for 9h. Continue to add 256.0g of isopropenylmagnesium bromide in methyl tetrahydrofuran solution dropwise, keep the reaction at 45°C for 6.5h, then add 35.8g of lithium aluminum hydride, and continue to react at 45°C for 13h. After the reaction, the reaction solution was gradually added to a 3.0mol / L hydrochloric acid solution, stirred for 0.5 to 2 hours, then extracted by adding 430mL of hexane, the organic phase was separated and dried by adding anhydrous magnesium sulfate, filtered and rotary evaporated to obtain based polycarbosilane. The polycarbosilane has a number average molecula...

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Abstract

The invention discloses a product and a preparation method thereof. The product is prepared through a photocuring rapid prototyping process, and a raw material used in the photocuring rapid prototyping process is a liquid photosensitive resin material. The product has excellent mechanical properties, high tensile strength and tensile modulus, smooth surface, low curing shrinkage, stable size and excellent mechanical properties. The liquid photosensitive resin material contains a liquid polycarbosilane with a linear ring structure and an unsaturated double bond, which has good stability and is convenient for storage, and the synthesis route is green and environmentally friendly without corrosion; the liquid linear polycarbosilane The density of active groups is high, the curing speed is fast, the strength of the cured product is high, the molecular weight is low, the viscosity is low, the fluidity is good, and the printability is good. It is especially suitable for the 3D printing process of light-curing rapid prototyping.

Description

technical field [0001] The invention relates to a product prepared by a photocuring rapid prototyping process and a preparation method thereof, belonging to the technical field of 3D printing materials. Background technique [0002] 3D printing technology has become the current field of rapid prototyping because it can quickly and directly manufacture parts of any structure, without molds, short development cycle, simple operation, fast forming speed, and has obvious cost and efficiency advantages in non-batch production. research hotspots. [0003] 3D printing technology is based on the computer three-dimensional design model, controlled by computer digital software program, using laser sintering, laser melting, light curing or heating and melting to build up materials such as metals, ceramics, photosensitive resins or polymers layer by layer. Three-dimensional solid products are produced. The unique manufacturing advantages make it develop rapidly, and it has been widely...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/16C08G77/60C04B35/565C04B35/584
CPCB33Y70/00C04B35/5603C04B35/571C04B35/589C04B2235/483C08G77/60C08L83/16
Inventor 贺丽娟赵新王琳
Owner BEIJING HENGCHUANG ADVANCED MATERIALS & ADDITIVE MFG INST CO LTD
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