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BPA-GA (bisphenol A-glutaraldehyde) phenol-formaldehyde resin and preparation method thereof

A BPA-GA and phenolic resin technology, applied in the field of BPA-GA phenolic resin and its preparation, can solve the problems of poor toughness of phenolic resin, restrict further application, etc., and achieve the effects of low production cost, low toxicity and widening application range.

Pending Publication Date: 2019-12-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, bisphenol A has been widely studied, and it can be used in many fields such as composite materials, molding compounds, coatings, epoxy molding compounds for chip packaging, epoxy intermediates and curing agents, so further research on bisphenol A Modification is very necessary; and the synthetic method of bisphenol A formaldehyde novolac resin is to be raw material with bisphenol A and formaldehyde in the prior art, under the condition of acidic catalyst, the carbocation that formaldehyde forms attacks bisphenol A The ortho position of the phenolic hydroxyl group with a higher electron cloud density, but the prepared phenolic resin often has poor toughness, which limits its further application in the chemical industry

Method used

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  • BPA-GA (bisphenol A-glutaraldehyde) phenol-formaldehyde resin and preparation method thereof
  • BPA-GA (bisphenol A-glutaraldehyde) phenol-formaldehyde resin and preparation method thereof
  • BPA-GA (bisphenol A-glutaraldehyde) phenol-formaldehyde resin and preparation method thereof

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preparation example Construction

[0025] A kind of preparation method of BPA-GA phenolic resin of the present invention, wherein BPA is bisphenol A, and GA is glutaraldehyde, and the chemical reaction principle in the preparation process is as follows,

[0026]

[0027] Under alkaline conditions, bisphenol A undergoes polycondensation reaction with glutaraldehyde, the phenolic hydroxyl ortho position of bisphenol A undergoes electron transfer with glutaraldehyde, and the phenolic hydroxyl ortho position of bisphenol A undergoes hydroxymethylation to graft glutaraldehyde , to achieve the effect of flexible chain forging growth.

[0028] The chemical formula of this BPA-GA phenolic resin is:

[0029]

[0030] The relative molecular mass is 4000-5000.

Embodiment 1

[0032] A kind of preparation method of BPA-GA phenolic resin of the present invention specifically comprises the following steps,

[0033] Step 1, take 11.4g of bisphenol A and 25mL of n-butanol into a 250mL three-necked round-bottomed flask with a mechanical stirrer, stir and heat to 65°C for 20min, n-butanol is used as a solvent to dissolve the solid bisphenol A get a solution;

[0034] Step 2, stir the solution to make it clear and transparent, cool to room temperature, then add 20g of glutaraldehyde aqueous solution with a mass fraction of 25% and 0.25g of a 1% NaOH solution with a mass fraction, and then heat to 95°C to react Time 6h, NaOH is used as a catalyst to obtain a mixed system containing BPA-GA phenolic resin;

[0035] Step 3, the mixed system obtained in step 2 is subjected to vacuum distillation at 95° C. for 1 h to remove n-butanol, water and glutaraldehyde;

[0036] Step 4, the mixture obtained in step 3 was dissolved in acetone solvent to form a mixed solu...

Embodiment 2

[0041] A kind of preparation method of BPA-GA phenolic resin of the present invention comprises the following steps,

[0042] Step 1, take 11.4g of bisphenol A and 25mL of n-butanol into a 250mL three-necked round bottom flask with a mechanical stirrer, stir and heat to 60°C for 30min;

[0043] Step 2, when the reaction system is clear and transparent, cool to room temperature, then add 21.6g of a 25% glutaraldehyde aqueous solution and 0.35g of a 1% NaOH solution, and then heat to 90°C to react Time 5.8h, obtain the mixed system containing BPA-GA phenolic resin;

[0044] Step 3, the mixed system obtained in step 2 was subjected to vacuum distillation at 90° C. for 45 minutes to remove n-butanol, water and glutaraldehyde;

[0045] Step 4, the mixture obtained in step 3 was dissolved in acetone solvent to form a mixed solution, and dialyzed for 6 hours, specifically, the mixed solution was put into a dialysis bag with a molecular weight of 500, and the two ends were sealed wit...

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Abstract

The invention provides BPA-GA (bisphenol A-glutaraldehyde) phenol-formaldehyde resin and a preparation method thereof. The method comprises the following steps: step 1, BPA and GA in the mass ratio of11.4:(5.0-5.4) are mixed with a NaOH solution, and a mixed system A is obtained; step 2, the mixed system A is subjected to a reaction at 90-100 DEG C for 5.8-6.2 h, and a mixed system B is obtained;and step 3, products in the mixed system B are separated and dried, and the BPA-GA phenol-formaldehyde resin is obtained. GA is grafted to the BPA phenolic hydroxyl ortho-position, a longer methylenechain segment is introduced, a flexible chain segment of the BPA phenolic hydroxyl ortho-position is extended, so that the phenol-formaldehyde resin achieves the toughening effect, and the treatmentprocess is simple; and furthermore, the application range of the phenol-formaldehyde resin in the chemical industry is expanded, and the phenol-formaldehyde resin has higher application value in multiple fields such as composite materials, molded plastics, coatings, epoxy molded plastics for chip packaging, epoxy intermediates and curing agents.

Description

technical field [0001] The invention belongs to the technical field of phenolic resins, in particular to a BPA-GA phenolic resin and a preparation method thereof. Background technique [0002] Bisphenol A is one of the most widely used industrial compounds in the world. Its chemical name is 2,2-bis(4-hydroxyphenyl)propane, which is obtained by condensation of phenol and acetone in acidic medium. Since the addition of bisphenol A to plastic products can make it colorless, transparent, durable and lightweight, bisphenol A is used in the production of fine chemical products such as plasticizers, flame retardants and heat stabilizers. [0003] Since the bisphenol A molecule contains more aromatic rings than the phenol molecule, the synthesized phenolic resin has a more stable structure and better heat resistance. Phenol A is chemically modified. In the article of "Plastic Industry" 1981, (04): 16-21+41, Tu Wanrong used boric acid, borax, bisphenol A and formaldehyde to obtain ...

Claims

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Application Information

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IPC IPC(8): C08G8/04C08L61/12C08L63/00
CPCC08G8/04C08L61/12C08L63/00C08L2201/08C08L2203/206
Inventor 郭睿闫育蒙马丽娟徐康张晓飞
Owner SHAANXI UNIV OF SCI & TECH
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