Dark-system photopolymerizable composition

A photopolymerization composition and photopolymerization technology, applied in the field of photopolymerization materials, can solve problems such as limiting the application of photocuring technology, limited penetration ability, and inability to penetrate light, so as to improve the depth of photopolymerization and improve mechanical properties. simple and efficient effect

Active Publication Date: 2020-01-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at this stage, the maximum absorption wavelength of commercial photoinitiators is short (mostly less than 500nm), and the light in this band has limited penetration ability in the resin system, plus the introduction of pigments and functional materials, especially black pigments system, causing light to be basically impenetrable and unable to achieve photopolymerization, which limits the application of photocuring technology in dark systems

Method used

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  • Dark-system photopolymerizable composition
  • Dark-system photopolymerizable composition
  • Dark-system photopolymerizable composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A composition for realizing deep photopolymerization of a black system, the components contained in the composition and the parts by mass of each component are:

[0038] 75 parts of polyurethane acrylate,

[0039] 20 parts of trimethylolpropane triacrylate,

[0040] 3 parts of bis-2,6-difluoro-3-pyrrole phenyl titanocene,

[0041] 0.1 parts of melanin,

[0042] Up conversion material NaYF 4 2 servings.

[0043] Mix the above composition evenly and add it into the test tube, place it vertically and use the emission wavelength 980nm, the energy density is 10W / cm 2 The light source is irradiated on the top of the test tube downward, and after 5 minutes, it is solidified to obtain a column with a certain length. When the melanin content is 0.1 part, the test result is shown in figure 2 As shown, the length of the column is 29mm, and the conversion rate of the double bond is as image 3 As shown, about 60%. Above-mentioned composition prepares tensile sample bar, ca...

Embodiment 2

[0045] A composition for realizing deep photopolymerization of a black system, the components contained in the composition and the mass parts of each component are the same as those in Example 1, the difference is that the content of melanin is changed to 0.3 parts, obtained under the same light conditions Column length, such as figure 2 22mm shown, double bond conversion rate as image 3 As shown, about 56%. Above-mentioned composition prepares tensile sample bar, carries out mechanical test, and tensile strength is as follows: Figure 4 , about 34MPa.

Embodiment 3

[0047] A composition for realizing deep photopolymerization of a black system, the components contained in the composition and the mass parts of each component are the same as those in Example 1, the difference is that the content of melanin is changed to 0.5 parts, obtained under the same light conditions Column length, such as figure 2 17mm shown, double bond conversion rate as image 3 As shown, about 52%. Above-mentioned composition prepares tensile sample bar, carries out mechanical test, and tensile strength is as follows: Figure 4 , about 36MPa.

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Abstract

The invention discloses a dark-system photopolymerizable composition and belongs to the technical field of photopolymerizable materials. The composition is prepared from the following components in parts by mass: 20-80 parts of a photopolymerizable prepolymer, 5-60 parts of a photopolymerizable monomer, 0.2-8 parts of a photoinitiator, 0.1-5 parts of a black pigment and 0.05-5 parts of an up-conversion material. The composition can be subjected to a photopolymerization reaction under direct irradiation of near-infrared light. The absorption on the near-infrared light can be avoided by the darkpigment, and the up-conversion material can absorb the near-infrared light with relatively good penetrability and emit ultraviolet light or visible light to induce the decomposition of free radicalsin the composition or an ionic type photoinitiator, thereby realizing the photopolymerization reaction of photopolymerizable substances; therefore, the photopolymerization of a dark composition is realized, the photopolymerization extent of the dark composition is improved, the mechanical properties of the polymer is improved and the application field is widened.

Description

technical field [0001] The invention relates to the technical field of photopolymerization materials, in particular to a dark-color system photopolymer composition. Background technique [0002] At present, the polymerization of the dark system is mainly realized by thermal polymerization, which requires heat drying treatment, and the curing efficiency is low. As an efficient and environmentally friendly green technology, light curing technology has developed rapidly in recent years. However, at this stage, the maximum absorption wavelength of commercial photoinitiators is short (mostly less than 500nm), and the light in this band has limited penetration ability in the resin system, plus the introduction of pigments and functional materials, especially black pigments The system makes light basically impenetrable and photopolymerization cannot be realized, which limits the application of photocuring technology in dark systems. [0003] Therefore, it is necessary to research...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F222/14C08F2/48C08K5/56C08K3/16
CPCC08F283/008C08F283/00C08F2/48C08K5/56C08K3/16C08K5/3417C08F283/10C08F290/064C08F290/067C09D175/14C08F222/104C08L75/14C08L63/00C08K3/04
Inventor 刘仁邹修成
Owner JIANGNAN UNIV
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