Polystyrene/melamine modified urea-formaldehyde resin syntactic foam and preparation method thereof

A syntactic foam and melamine technology, applied in the field of foam insulation materials, can solve the problems of poor flame retardancy and other problems

Active Publication Date: 2015-12-02
HANGZHOU FANGYUAN PLASTICS MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects of poor flame retardancy of existing polystyrene materials, and to provide a polystyrene / melamine modified urea-formaldehyde resin composite foam, which is passed through pre-expanded polystyrene particles Add melamine-modified urea-formaldehyde resin, flame retardant and flame-retardant synergist to improve the flame-retardant performance of polystyrene products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 24.32g of 37% formaldehyde solution and 9g of the first part of urea into the three-necked flask, then add 1g of 50% sodium hydroxide solution, slowly raise the temperature to 85°C, keep the temperature for 40 minutes, then lower the temperature to 70°C, and add 0.5g of anhydrous formic acid At the same time, the temperature was raised to 75°C, and the second batch of urea 3g was added, and after 10 minutes of reaction, 3g of 50% sodium hydroxide solution was added, and the temperature was raised to 85°C, and 0.6g of melamine and the third batch of urea 3g were added, and cooled to room temperature after the reaction After discharging, the melamine-modified urea-formaldehyde resin is obtained; the free formaldehyde content of the resin is 0.293%, and the solid content is 64.0%.

Embodiment 2

[0028] Add 24.32g of 37% formaldehyde solution and 9g of the first part of urea into the three-neck flask, then add 1.5g of 50% barium hydroxide solution, slowly raise the temperature to 90°C, keep the temperature for 60 minutes, then lower the temperature to 65°C, add 0.5% anhydrous formic acid g at ​​the same time, the temperature is raised to 80°C, and the second batch of urea 3g is added. After 25 minutes of reaction, 3g of barium hydroxide solution is added. At the same time, the temperature is raised to 90°C, and 0.62g of melamine and the third batch of urea 3.6g are added. After the reaction, cool to room temperature After discharging, the melamine-modified urea-formaldehyde resin is obtained; the free formaldehyde content of the resin is 0.158%, and the solid content is 67.9%.

Embodiment 3

[0030] Add 24.32g of 37% formaldehyde solution and 9g of the first part of urea into the three-neck flask, then add 1.5g of 50% barium hydroxide solution, slowly raise the temperature to 85°C, keep the temperature for 60 minutes, then lower the temperature to 70°C, add 0.5g of hydrochloric acid at the same time Raise the temperature to 80°C, add the second batch of urea 3g, add 3g of barium hydroxide solution after reacting for 25 minutes, raise the temperature to 90°C, add melamine 0.62g and the third batch of urea 3.6g, cool to room temperature and discharge after the reaction , to obtain melamine-modified urea-formaldehyde resin; the free formaldehyde content of the resin is 0.244%, and the solid content is 65.6%.

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Abstract

The invention discloses a polystyrene/melamine modified urea-formaldehyde resin syntactic foam and a preparation method thereof. Greater additive amount of a fire retardant and lower fire retarding efficiency are always important factors restricting the development of polystyrene materials. According to the polystyrene/melamine modified urea-formaldehyde resin syntactic foam, melamine modified urea-formaldehyde resin, an inorganic filler, a fire retardant and a fire retarding synergist form a melamine modified urea-formaldehyde resin mixed filler, the mass ratio of the melamine modified urea-formaldehyde resin mixed filler to pre-foamed polystyrene particles is 100:(20 to 70), and the melamine modified urea-formaldehyde resin mixed filler is evenly coated on the surface of the pre-foamed polystyrene particles. When flam contacts the syntactic foam, the melamine modified urea-formaldehyde resin mixed coated on the outer layer is char to form a protection layer to isolate the flame, thus achieving the aim of flame retarding by the syntactic foam.

Description

technical field [0001] The invention relates to a foam insulation material, in particular to a polystyrene / melamine modified urea-formaldehyde resin composite foam plastic and a preparation method thereof. Background technique [0002] As one of the five general-purpose plastics, polystyrene is currently the most widely used foam insulation material in my country. Because of its closed-cell honeycomb structure, polystyrene boards have extremely low water absorption, thermal conductivity, and high compression resistance. And anti-aging, but also has the advantages of light weight, good dimensional stability, good mechanical properties, electrical insulation properties and processing properties, and is widely used in medical equipment, household appliances, transportation, military and other industries. [0003] With the rapid development of the construction industry and the deepening of residential commercialization, as well as people's continuous improvement of energy conserv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/30C08L25/06C08G12/38C08K13/04C08K7/24C08K3/22C08K3/26C08K3/32C08K5/053C08K5/3492C08K3/38C08J9/228
Inventor 袁国清张胜曹博赵祖兵袁健华姜鹏章杰王庭芳
Owner HANGZHOU FANGYUAN PLASTICS MASCH CO LTD
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