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Preparation method of borate modified phenolic foam material

A phenolic foam material and a borate ester technology, applied in the material field, can solve the problems of reduced flame retardant and fireproof performance of phenolic foam, reduced powder drop rate and the like, and achieve the effects of good flame retardant performance, reduced powder drop rate and simple process

Inactive Publication Date: 2013-09-11
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to literature reports [J. Appl. Polym. Sci. 2007, 104(3), 1399-1407; Fire extinguishing agent and flame retardant materials. 2006, 25(3), 373-375.], commonly used in toughening phenolic resin and The high molecular substances of its foam products, such as rubber, thermoplastic resin, etc., are flammable by themselves. After adding, it can improve the toughness of phenolic foam and reduce the powder drop rate, and at the same time reduce the flame retardant and fireproof performance of phenolic foam.

Method used

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  • Preparation method of borate modified phenolic foam material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) put H 3 BO 3 Dissolve and disperse in polyethylene glycol: 60g PEG at room temperature under rapid mechanical stirring 200 6.2g H 3 BO 3 Disperse and dissolve.

[0019] (2) Polyethylene glycol is heated up to the preset temperature with H 3 BO 3 Esterification by molar ratio: the system is gradually heated up to 120°C, and the esterification reaction is carried out for 3 hours, polyethylene glycol and H 3 BO 3 The molar ratio is 3:1.

[0020] (3) The product is cooled to obtain the flame retardant modifier borate. The infrared spectrum of borate esters is shown in figure 1 as shown..

[0021] (4) Preparation of modified phenolic foam material

[0022] Add 8 parts by mass (100 parts by mass of resole phenolic resin) of flame retardant modifier to the resole phenolic resin, then add 5 parts by mass of Tween-80, 9 parts by mass of curing agent, 8 parts by mass of n-pentane The foaming agent was stirred and mixed evenly, and cured at 80°C for 50 minutes to...

Embodiment 2

[0024] (1) put H 3 BO 3 Dissolve and disperse in polyethylene glycol: 75g PEG at room temperature under rapid mechanical stirring 400 4g H 3 BO 3 Disperse and dissolve.

[0025] (2) Polyethylene glycol is heated up to the preset temperature with H 3 BO 3 Esterification reaction by molar ratio: gradually raise the temperature of the system to 130°C, carry out the esterification reaction for 2.5 hours, polyethylene glycol and H 3 BO 3 The molar ratio is 3:1.

[0026] (3) The product is cooled to obtain a flame retardant modifier.

[0027] (4) Preparation of modified phenolic foam material

[0028] Add 6 mass parts (100 mass parts of resole phenolic resin) flame retardant modifier to resole phenolic resin, then add 5 mass parts of Tween-80, 9 mass parts of curing agent, 8 mass parts of n-pentane hair The foaming agent was stirred and mixed evenly, and cured at 80°C for 50 minutes to prepare a modified phenolic resin foam material.

Embodiment 3

[0030] (1) put H 3 BO 3 Dissolve and disperse in polyethylene glycol: 65.6g PEG at room temperature under rapid mechanical stirring 400 3.5g H 3 BO 3 Disperse and dissolve.

[0031] (2) Polyethylene glycol is heated up to the preset temperature with H 3 BO 3 Esterification by molar ratio: The system is gradually heated up to 130°C, and the esterification reaction is carried out for 2 hours, polyethylene glycol and H 3 BO 3 The molar ratio is 3:1.

[0032] (3) The product is cooled to obtain the flame retardant modifier borate.

[0033] (4) Preparation of modified phenolic foam material

[0034] Add 4 mass parts (100 mass parts of resole phenolic resin) flame retardant modifier to resole phenolic resin, then add 5 mass parts of Tween-80, 9 mass parts of curing agent, 8 mass parts of n-pentane hair The foaming agent was stirred and mixed evenly, and cured at 80°C for 50 minutes to prepare a modified phenolic resin foam material.

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Abstract

The invention belongs to the technical field of materials, and relates to a preparation method of borate modified phenolic foam material. The borate is prepared by esterification reaction of boric acid and polyethylene glycol under certain temperature. The preparation method of the borate modified phenolic foam material comprises the following steps of: firstly, weighing 100 mass parts of A-stage phenolic resin, then, respectively adding 2-14 mass parts of borate, 3-6 mass parts of surface active agent, 8-11 mass parts of curing agent and 6-14 parts of foaming agent, stirring and mixing evenly, pouring the mixture into a die, closing the die, foaming for 30-60min under 70-90 DEG C, and sequentially obtaining the borate modified phenolic foam. The phenolic foam material is high in flame retardant efficiency, low in powdery rate and low in smoke development, and generates no toxic and corrosive gases.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a borate-modified phenolic foam material. Background technique [0002] Polymer foam materials are widely used as thermal insulation materials for buildings due to their light weight, low cost and low thermal conductivity. At present, polystyrene foam and polyurethane foam are widely used in the market, but their heat resistance is poor, flammable, and there is a fire hazard. Phenolic foam has become a promising foam material because of its excellent flame retardancy, heat resistance, and low flame toxicity. However, due to the structural characteristics of phenolic resin, phenolic foam products are brittle, hard and easy to powder, which seriously affects the service life of phenolic foam and limits the application field of phenolic foam. [0003] In view of the shortcomings of phenolic resin and its foam materials, scientific and technolo...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08L71/08C08K13/02C08K3/32C08K5/42C08J9/14C08G65/48
Inventor 王正洲隋孝禹
Owner TONGJI UNIV
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