Reaction type polyurethane hot melt material for 3D printing and preparation method thereof

A hot-melt material, 3D printing technology, used in polyurea/polyurethane adhesives, additive processing, adhesive types, etc., can solve the problems of insufficient strength, toughness, and high production costs, and achieve low processing and molding temperatures. , The effect of simple equipment and easy large-scale production

Active Publication Date: 2018-08-10
吴键儒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the production cost of domestic 3D printing materials is relatively high, and there are still disadvantages of insufficient strength and toughness. Therefore, a 3D printing material with low production cost, high strength and high toughness is urgently needed in the market

Method used

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  • Reaction type polyurethane hot melt material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example provides a method for preparing a reactive polyurethane hot-melt material for 3D printing. The specific steps are as follows: in parts by mass, 40 parts of adipic acid-1,4-butanediol (PBA), 20 parts of polypropylene glycol, 20 parts of polycaprolactone (molecular weight 20000), 3-hydroxyethyl-1 and 3-oxazolidine are placed in the reactor, 3-hydroxyethyl-1 and 3-oxazolidine A total of 2 parts, heated to 120 ° C, dehydrated under vacuum for 1 hour under stirring, then added 18 parts of isocyanate (MDI), reacted for 2 hours under stirring, and vacuumed, when NCO reached the theoretical value, under the condition of nitrogen protection Pour out the product and seal the package to obtain a reactive polyurethane hot-melt material for 3D printing.

Embodiment 2

[0021] This example provides a method for preparing a reactive polyurethane hot-melt material for 3D printing. The specific steps are as follows: in parts by mass, 40 parts of 1,6-hexanediol sebacate, 25 parts 12 parts of polypropylene glycol, 12 parts of polycaprolactone (molecular weight 50000), and 3 parts of salicylaldimine are placed in a reaction kettle, heated to 110 ° C, and vacuum dehydrated for 1 hour under stirring, then 20 parts of IPDI are added, and stirred React for 2 hours, and vacuumize. When the NCO reaches the theoretical value, pour out the product under nitrogen protection conditions, seal the package, and obtain a reactive polyurethane hot-melt material for 3D printing.

Embodiment 3

[0023] This example provides a method for preparing a reactive polyurethane hot-melt material for 3D printing. The specific steps are as follows: in parts by mass, 30 parts of adipic acid-1,4-butanediol (PBA), 15 parts of polytetrahydrofuran diol, 48 parts of polycaprolactone (molecular weight 200000), 2-phenyl-3-hydroxyethyl-1, 3-oxazolidine are placed in the reaction kettle, 2-phenyl-3 -2 parts of hydroxyethyl-1 and 3-oxazolidine in total, heated to 120°C, dehydrated under vacuum for 1 hour with stirring, then added 5 parts of MDI, reacted with stirring for 2 hours, and vacuumed, when NCO reached the theoretical value , the product was poured out under nitrogen protection conditions, sealed and packaged to obtain a reactive polyurethane hot-melt material for 3D printing.

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Abstract

The invention relates to a reaction type polyurethane hot melt material for 3D printing and a preparation method thereof. The reaction type polyurethane hot melt material is prepared from 10 to 70 parts of polyester polyol, 5 to 65 parts of polyether polyol, 1 to 80 parts of polycaprolactone, 0.1 to 10 parts of latent curing agents and 5 to 30 parts of isocyanate. The reaction type polyurethane hot melt material for 3D printing is prepared from polyhydric alcohols containing active groups (hydroxyls) and isocyanate groups (NCO) through copolymerization; the tail ends of polymer chains containactive groups NCO; the NCO can take irreversible crosslinking reaction with moisture in pasted materials or in the air, so that the high bonding intensity is obtained.

Description

technical field [0001] The invention relates to a printing material, in particular to a reactive polyurethane hot-melt material for 3D printing and a preparation method thereof. Background technique [0002] 3D printing (3D printing), which is a kind of rapid prototyping technology, is also called additive manufacturing technology. It is based on digital model files and uses bondable materials such as powdered metal or plastic. The technology of constructing objects in a unique way is called "manufacturing technology with industrial revolution significance". [0003] 3D printing is usually achieved using digital technology material printers. It is often used to make models in the fields of mold manufacturing and industrial design, and is gradually used in the direct manufacture of some products. There are already parts printed using this technology. The technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/04C09J175/06C09J175/08C08G18/48C08G18/42B33Y70/00
CPCB33Y70/00C08G18/4018C08G18/4238C08G18/4277C08G18/4825C08G18/4854C09J175/04C09J175/06C09J175/08
Inventor 平川
Owner 吴键儒
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