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Modified bismaleimide-triazine resin and preparation method thereof

A technology of bismaleimide and triazine resin is applied in the field of high-performance resin and preparation thereof, modified bismaleimide-triazine resin and preparation thereof, and can solve the problem of being unfavorable for maintaining heat resistance of BT resin. It can prevent the problems of excellent flame retardancy of polysiloxane, and reduce the heat resistance of modified resin, so as to achieve the effect of excellent processing technology and phase structure, excellent water repellency, and outstanding heat resistance.

Inactive Publication Date: 2010-09-08
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, if these hyperbranched polysiloxanes are used to modify BT resins, there are deficiencies, this is due to the presence of a large amount of Aliphatic groups and flexible silicone chain links. Therefore, although the obtained modified BT resin has toughness superior to pure BT resin, the rigidity of the modified resin is far lower than that of pure BT resin, and the modified The coefficient of thermal expansion (CTE) of the resin is also higher than that of pure BT resin
On the other hand, since the active groups in the molecular structure of these hyperbranched polysiloxanes all have longer aliphatic groups (links), their existence is not conducive to maintaining the heat resistance of BT resins, and It hinders the embodiment of the excellent flame retardancy of polysiloxane
A modified BT resin was reported in the literature "Novel modification of bismaleimide-triazine resin by reactive hyperbranched polysiloxane" ([J] Mater.Sci, 2010, 45: 1859), which uses 0,0'-diallyl bis Phenol A, to some extent reduces the heat resistance of the modified resin

Method used

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  • Modified bismaleimide-triazine resin and preparation method thereof
  • Modified bismaleimide-triazine resin and preparation method thereof
  • Modified bismaleimide-triazine resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After weighing 1.98 g of deionized water and 19.8 g of phenyltrimethoxysilane and mixing them uniformly, slowly add 38% HCl dropwise at room temperature with stirring until the pH of the solution is 1. 10 minutes after the completion of the dropwise addition, the temperature was raised to 50°C to continue the reaction for 4 hours. After the reaction was completed, the methanol was evaporated by vacuum drying to obtain a transparent and viscous hyperbranched polysiloxane with phenyl as the terminal group. Its structural formula is:

[0031]

[0032] Wherein, R is a phenyl group, and Me is a methyl group.

[0033] See attached figure 1 Shown, it is the hyperbranched polysiloxane of the present embodiment 29 Si-NMR spectrum. from figure 1 It can be seen that the synthesized polysiloxane has linear, terminal and branched units, and its branching degree is 0.40, which is a polysiloxane with a typical hyperbranched structure.

[0034] Weigh 1g of the above hyperbranch...

Embodiment 2

[0036] Prepare the hyperbranched polysiloxane with phenyl as the end group by the method of Example 1.

[0037] Weigh 5.3g of the above hyperbranched polysiloxane, 100.0g of bisphenol A type cyanate and 33.0g of diphenylmethane type bismaleimide, and mix them uniformly at 150°C to obtain the modified BT resin.

[0038] Pour the obtained modified BT resin into the preheated casting mold, vacuum defoam at 150°C for 2 hours, and then cure according to the process of 180°C / 2h+200°C / 2h+220°C / 2h+240°C / 4h And post-processing, demoulding after natural cooling, obtains cured modified BT resin. Some properties of cured resins are listed in Figure 2 ~ Figure 6 .

Embodiment 3

[0040] According to the method of Example 1, a hyperbranched polysiloxane with a phenyl group as an end group was prepared.

[0041] Weigh 10.6g of the above-mentioned hyperbranched polysiloxane, 100.0g of bisphenol A type cyanate and 33.0g of diphenylmethane type bismaleimide, and mix them uniformly at 150°C to obtain the modified BT resin.

[0042] Pour the obtained modified BT resin into the preheated casting mold, vacuum defoam at 150°C for 2 hours, and then cure according to the process of 180°C / 2h+200°C / 2h+220°C / 2h+240°C / 4h And post-processing, demoulding after natural cooling, obtains cured modified BT resin. Some properties of cured resins are listed in Figure 2 ~ Figure 6 .

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Abstract

The invention discloses a modified bismaleimide-triazine resin and a preparation method thereof. The preparation method comprises the following steps of: uniformly mixing deionized water with phenyl trimethoxy silane in a mole ratio of 1.1:1-1.4:1, and performing a reaction under a condition that the temperature is between 50 and 60 DEG C to obtain hyper-branched polysiloxane using phenyl as a terminal group; and uniformly mixing 1 to 40 parts of the hyper-branched polysiloxane with 100 parts of cyanate and 5 to 100 parts of bismaleimide by weight under a condition that the temperature is between 80 and 150 DEG C to obtain the modified bismaleimide-triazine resin. The preparation method has the characteristics of wide applicability and simple operation process. The obtained modified resin has the advantages of high forming usability, high mechanical properties, high flame retardance, low thermal expansion coefficient, higher thermal stability, higher dielectric property and humidity resistance, can be used as high-performance resin matrix, an adhesive, an insulating varnish and the like, and can be widely applied in the high-tech fields of aerospace, electronic apparatus, communications and transport and the like.

Description

technical field [0001] The invention relates to a high-performance resin and a preparation method thereof, in particular to a modified bismaleimide-triazine resin and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] As a high-performance resin, bismaleimide-triazine resin (BT resin) combines the advantages of bismaleimide resin and cyanate resin, and has high heat resistance, good moisture resistance, low Therefore, BT resin shows great application prospects in cutting-edge fields such as electronic appliances and aerospace. [0003] The rapid development of modern industry has put forward higher and more performance requirements for materials, mainly in more prominent thermal stability, better dielectric properties, better mechanical properties, lower water absorption, better Molding process. BT resin is a kind of thermosetting resin. Like other thermosetting resins, BT resin also has the problem of high br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/06C08G73/10C08G77/388
Inventor 梁国正卓东贤顾媛娟曹雷袁莉胡江涛
Owner SUZHOU UNIV
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