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A kind of bismaleimide resin prepolymer and preparation method thereof

A technology of maleimide resin and bismaleimide is applied in the field of bismaleimide resin prepolymer and its preparation to achieve product quality stability and production efficiency improvement, solubility increase, structure The effect of regularity reduction

Active Publication Date: 2021-03-23
陕西硕博电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] (3) The process of each batch of resin synthesis is intermittent, that is, the production of one pot and one pot, which also results in the stability and difference of each batch of resin quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0061] The preparation method of the improved diallyl bisphenol A that the present invention relates to, comprises the following steps:

[0062] Step 1, adding an inert solvent and bisphenol A diallyl ether to a reactor equipped with a stirring device, a temperature measuring device and a reflux condensation device respectively; wherein, the mass ratio of the inert solvent to bisphenol A diallyl ether It is 4:1.

[0063] Step 2: Warm up to the reflux temperature of the system (200-205° C.) under stirring conditions, and time the reaction at the reflux temperature for 3-5 hours.

[0064] In step 3, the temperature of the reaction system is lowered to 140-160° C., the inert solvent is distilled off under vacuum conditions, and condensed for recovery.

[0065] Step 4, collecting the residue in the reactor to obtain improved diallyl bisphenol A.

[0066] The bismaleimide resin prepolymer of the present invention and its preparation method are specifically illustrated below.

Embodiment 1

[0068] The bismaleimide resin prepolymer of the present embodiment is formed by Diels-Alder reaction in twin-screw extruder reactor by bismaleimide eutectic mixture and diallyl bisphenol A .

[0069] Wherein, bismaleimide eutectic mixture is prepared by synthetic reaction of maleic anhydride and diamine mixture; said diamine mixture includes two or more diamine compounds, and two or two The above diamine compounds contain at least one aromatic diamine; the molecular structure of each diamine compound in the diamine mixture is different; in addition to the aromatic diamine, the diamine compound can also include aliphatic diamine and alicyclic diamine. amine.

[0070] The diallyl bisphenol A of this example is prepared by an existing process.

[0071] The preparation method of the bismaleimide resin prepolymer of the present embodiment may further comprise the steps:

[0072] Step 1, bismaleimide eutectic mixture and diallyl bisphenol A are mixed homogeneously, obtain mixed r...

Embodiment 2

[0081] The bismaleimide resin prepolymer of this embodiment forms by Diels-Alder reaction in twin-screw extruder reactor by bismaleimide monomer and improved diallyl bisphenol A .

[0082] The preparation method of the bismaleimide resin prepolymer of the present embodiment may further comprise the steps:

[0083] Step 1, the bismaleimide monomer and the improved diallyl bisphenol A are mixed uniformly to obtain a mixed reactant; the mole of the bismaleimide monomer and the improved diallyl bisphenol A The ratio is 0.8:1.

[0084] Step 2, feed the mixed reactant continuously and evenly into the twin-screw extruder, and control the temperature of the twin-screw extruder to be 185°C; control the extrusion speed of the twin-screw extruder so that the mixed reactant is fed into the twin-screw extruder The time from the extruder to extrusion from the outlet of the twin-screw extruder was maintained at 8min.

[0085] Step 3, cooling the molten resin extruded from the outlet of th...

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Abstract

The invention discloses a bismaleimide resin pre-polymer and a preparation method thereof. The bismaleimide resin pre-polymer is prepared by carrying out Diels-Alder reaction on bismaleimide and diallylbisphenol A in a double-screw extruder reactor; or the bismaleimide resin pre-polymer is prepared by carrying out Michael addition reaction on the bismaleimide and diamine in the double-screw extruder reactor, wherein the bismaleimide comprises a bismaleimide monomer or a bismaleimide low-eutectic mixture; the diallylbisphenol A comprises existing diallylbisphenol A and improved diallylbisphenolA; the diamine comprises a diamine monomer and a diamine mixture. The preparation method provided by the invention takes a double-screw extruder as a reaction container, accurate control of the temperature can be realized, inner and outer parts of resin are uniform and consistent and the temperature gradient is zero; furthermore, continuous-method continuous production can be realized, and the quality stability and production efficiency of a product are greatly improved; the bismaleimide resin pre-polymer disclosed by the invention has higher quality.

Description

technical field [0001] The invention belongs to the technical field of bismaleimide resin preparation, and in particular relates to a bismaleimide resin prepolymer and a preparation method thereof. Background technique [0002] Bismaleimide resin prepolymer powder can be used as a diamond grinding wheel resin bond and molding powder for the manufacture of high temperature mechanical parts; dissolved in an organic solvent can be used as a high temperature resistant adhesive for polyimide laminates And the manufacture of polyimide copper clad laminate; bismaleimide resin prepolymer is very widely used. [0003] Bismaleimide resin prepolymer is a linear chain extended bismaleimide resin prepolymer produced by Michael addition reaction of bismaleimide monomer and diamine compound under melting conditions ; Or a linear chain-extended bismaleimide resin prepolymer generated by a Diels-Alder reaction between a bismaleimide monomer and diallyl bisphenol A under melting conditions. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/12
CPCC08G73/12C08G73/126
Inventor 冯翔冯立起
Owner 陕西硕博电子材料有限公司