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Double-component catalyst for cyanate solidification reaction and its preparing process

A curing reaction and cyanate ester technology, applied in the chemical industry, can solve the problems of limitation, small dosage, difficult to control the dosage, etc., and achieve the effects of easy weighing, high catalytic activity and selectivity

Inactive Publication Date: 2009-06-24
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, since the amount of the organotin catalyst is very small, about 50-500*10 organotin catalyst [Sn] needs to be added per 1 g of cyanate monomer -6 g, it is not easy to control its addition amount, which makes it limited in actual use

Method used

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  • Double-component catalyst for cyanate solidification reaction and its preparing process
  • Double-component catalyst for cyanate solidification reaction and its preparing process
  • Double-component catalyst for cyanate solidification reaction and its preparing process

Examples

Experimental program
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Effect test

preparation example Construction

[0045] Preparation of organotin compound (bisphenol A type):

[0046] Weigh 11.4g of dibutyltin dilaurate (DBTDL, 0.018mol) and 10.0g of bisphenol A cyanate (BADCy, 0.036mol) in a beaker, and react at 60-80°C for 20-30min to obtain organotin Compound catalyst, [Sn]=0.1g per 1g of organotin compound.

[0047] Preparation of organotin compound (bisphenol L type):

[0048] Weigh 10.1g of dibutyltin dilaurate (DBTDL, 0.016mol) and 8.5g of 4,4'-dicyanato-diphenylpropane (BEDCy, 0.036mol) in a beaker, and react at 40-70°C for 20 ~30min, the organotin compound catalyst is prepared, [Sn]=0.1g in every 1g of organotin compound.

Embodiment 1

[0050] Weigh 268g of epoxy E-51 resin and place it in a beaker, heat it to 60-80°C in an oil bath, add 10.7g of organotin compound (bisphenol A type), keep the temperature at 60-80°C, and stir for 15min. Heating was stopped, and it was naturally cooled to room temperature to obtain a two-component organotin compound catalyst in the form of light brown viscous liquid. Tin content [Sn]=0.003845g per 1g of two-component catalyst.

Embodiment 2

[0052] Except that epoxy E-51 resin takes by weighing 536g, other is identical with embodiment 1. Tin content [Sn]=0.001922g per 1g of two-component catalyst.

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Abstract

The invention discloses a composition of a two-component organotin compound catalyst and a preparation method thereof. The catalyst is mainly used in the curing reaction of cyanate resin. Its composition includes organotin compounds and reactive small molecule compounds. The molecular formula of the organotin compound is: (H9C4)2Sn(NCO-R-OCN)2; wherein the reactive small molecule compound acts as a reactive diluent, and it can polymerize to form a high polymer while the cyanate resin is curing. In order to improve the manufacturability, it will not adversely affect the performance of the cyanate ester cured resin. The preparation process of the two-component catalyst is that the above two components are stirred for 15-25 minutes under the heating condition of 40-80° C., and then naturally cooled to room temperature. The invention has high catalytic activity and selectivity, can be well dissolved and dispersed in the cyanate monomer, and is easy to weigh so as to control the dosage.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a catalyst, especially a catalyst which can be used for curing reaction of cyanate resin. Background technique [0002] Cyanate resin is a kind of thermosetting resin, which has good heat resistance, mechanical properties, dielectric properties and moisture and heat stability. As a matrix resin for the preparation of high-performance resin-based composite materials, cyanate esters and their composite materials can be used as structural materials, wave-transmitting materials, adhesive materials, dielectric functional materials, etc. in aerospace, electronic information and other fields. [0003] However, pure cyanate ester is difficult to heat-cure, that is, without an external catalyst, its heat-curing reaction is slow and difficult. Therefore, in order to make the cyanate resin easy to heat-cure, a catalyst must be added to the resin system to promote its curing reaction. [0004...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/00C08K5/57
Inventor 李文峰王志强轩立新王国建
Owner TONGJI UNIV
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