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Resin composition for light molding

A resin composition and optical modeling technology, applied in the fields of denture base materials, dental braces, and three-dimensional modeling objects, can solve the problems of reduced modeling, easy to break, easy to break, etc., and achieve easy modeling, toughness and water resistance. excellent effect

Pending Publication Date: 2022-05-03
KURARAY NORITAKE DENTAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the deformation recovery property is impaired, the corrective force and impact absorption will be lost, and the function as a wearing tool will not be fulfilled. If the toughness is impaired, there will be problems such as frequent re-production if the wearing feeling deteriorates or it is easy to break.
Furthermore, if the water resistance is impaired, there is a problem that the mechanical properties are lowered, the correcting force or impact absorption is inevitably lost, or the damage is easily caused, and it is not durable for practical use.
A photocurable resin composition is used for molding, but generally there is a tendency to use a low-polarity monomer for a resin composition that exhibits flexibility and water resistance, so curability is lowered, which is one of the reasons. The cured product tends to have poor recovery from deformation, especially in optical three-dimensional modeling, where the light irradiation time is extremely short and the shape of each layer is exposed to oxygen, so curing is particularly likely to become insufficient, and it has been difficult to achieve both deformation until now Recovery, Toughness, Water Resistance
Furthermore, it is necessary to have a viscosity that can shape the resin composition, but when a monomer with a low molecular weight is used to reduce the viscosity, the curability tends to decrease. On the other hand, monomers that exhibit deformation recovery are often high molecular weight. , high-viscosity monomer, there is a problem that the moldability is reduced
Therefore, as the whole resin composition for three-dimensional modeling, it is difficult to make the cured product have excellent characteristics such as deformation recovery, toughness, and water resistance, and it is difficult to obtain a product with low viscosity and excellent shapeability.
[0009] Against this background, as a technology capable of optical three-dimensional modeling with excellent toughness and water resistance of the cured product, for example, Patent Document 3 proposes (meth)acrylamide-based urethane oligomers and homopolymers A photocurable resin composition with a high Tg (meth)acrylic compound as an essential component, but there is no description on the recovery from deformation

Method used

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  • Resin composition for light molding
  • Resin composition for light molding

Examples

Experimental program
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Embodiment

[0117] Next, examples are given to describe the present invention in more detail. However, the present invention is not limited by these examples, and those skilled in the art can make various modifications within the scope of the technical idea of ​​the present invention.

[0118] Each component used in the resin composition for photo-styling according to an example or a comparative example is demonstrated with abbreviation as follows.

[0119] [Monofunctional polymerizable monomer (A1)]

[0120] PMPMA: Pentamethylpiperidinyl methacrylate (manufactured by Adeka, liquid, Tg of homopolymer: 105°C)

[0121] ACMO: N-acryloylmorpholine (manufactured by KJ Chemicals Co., Ltd., liquid, Tg of homopolymer: 145° C.).

[0122] [Polyfunctional polymerizable monomer (A2)]

[0123] TCDDMA: Tricyclodecane dimethanol diacrylate (manufactured by Baker Industrial Co., Ltd., liquid, Tg of homopolymer: 214° C.)

[0124] THIA: Tris (2-hydroxyethyl) isocyanurate triacrylate (produced by Pakista...

Synthetic example 1

[0135] [Manufacture of urethanized (meth)acrylic compound (C1)-1]

[0136] (1) 250 g of isophorone diisocyanate and 0.15 g of di-n-butyltin dilaurate were added to a four-neck flask with an inner volume of 5 L equipped with a stirrer, a temperature regulator, a thermometer, and a condenser, and heated to 70° C. with stirring.

[0137] (2) On the other hand, a polyester polyol ("Kuraray Polyol (registered trademark) P-2050" manufactured by Kuraray Co., Ltd.; a polyol composed of sebacic acid and 3-methyl-1,5-pentanediol) , Weight average molecular weight Mw: 2000) 2500g was added in the dropping funnel with side pipe, and the liquid of this dropping funnel was added dropwise in the flask of above-mentioned (1). It should be noted that, while stirring the solution in the flask of the above (1), it was added dropwise at a constant speed over 4 hours while maintaining the internal temperature of the flask at 65 to 75°C. Furthermore, after completion|finish of dripping, it stirre...

Synthetic example 2

[0139] [Manufacture of urethanized (meth)acrylic compound (C1)-2]

[0140] (1) 250 g of isophorone diisocyanate and 0.15 g of di-n-butyltin dilaurate were added to a four-neck flask with an inner volume of 5 L equipped with a stirrer, a temperature regulator, a thermometer, and a condenser, and heated to 70° C. with stirring.

[0141](2) On the other hand, a polyester polyol ("Kurare Polyol (registered trademark) P-2030" manufactured by Kurare Co., Ltd.; Alcohol, weight-average molecular weight (Mw: 2000) 2500 g was added to a dropping funnel with a side pipe, and the liquid in the dropping funnel was dropped into the flask of (1) above. It should be noted that, while stirring the solution in the flask of the above (1), the dropwise addition was performed at a constant speed over 4 hours while maintaining the internal temperature of the flask at 65 to 75°C. Furthermore, after completion|finish of dripping, it stirred and made it react at this temperature for 2 hours.

[014...

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Abstract

The present invention provides a resin composition for light shaping, which is easy to shape by light shaping and has excellent deformation recovery, toughness and water resistance of a cured product. The present invention relates to a resin composition for light shaping, which contains (A) a polymerizable compound having a homopolymer glass transition temperature (Tg) of 37 DEG C or more and (B) a photopolymerization initiator, and which has a tan [delta] at 37 DEG C after curing of 0.3 or less.

Description

technical field [0001] The present invention relates to a resin composition for photosculpting. More specifically, in the present invention, it is possible to obtain a three-dimensional shaped object that is easy to shape when shaping by photo-shaping, and is excellent in deformation recovery, toughness, and water resistance. It is especially suitable for dental braces and denture base materials. Background technique [0002] A necessary amount of controlled light energy is supplied to the liquid photocurable resin to cure it into a thin layer, and after further supplying the liquid photocurable resin thereon, it is irradiated with light under control to make it laminated and cured into a thin layer. Patent Document 1 discloses a method of manufacturing a three-dimensional object in a thin layer by repeating the above steps, that is, a so-called optical three-dimensional modeling method. Furthermore, its basic practical method was further proposed in Patent Document 2, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/34C08F220/58C08F222/14C08F222/22C08F2/48A61C7/08A61K6/15A61K6/887
CPCC08F283/008C08F2/48A61C7/08A61K6/887A61K6/15C08F220/34C08F220/58C08F222/102C08F222/103C08L51/08B33Y70/00B33Y80/00B29C64/124B33Y10/00C08F290/147C08F222/1065C08L33/08C08L33/10C08L33/24B29K2075/00C08F2/50
Inventor 铃木宪司伊东美咲
Owner KURARAY NORITAKE DENTAL