Modified melamine formaldehyde resin-based EPS flame retardant thermal insulating board and preparation method thereof

A technology of melamine and formaldehyde resin, which is applied in thermal insulation, building components, fire protection, etc., can solve the problems of unsatisfactory mechanical properties of plates, unsatisfactory flame retardant effect, and small deformability, etc., to achieve improved storage stability, high rigidity, The effect of small deformability

Active Publication Date: 2014-04-09
SUZHOU INST OF BUILDING SCI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are a large number of mortar-coated EPS composite boards on the market. Although the surface is a flame-retardant mortar layer, the inner EPS board will melt and shrink rapidly under high-temperature baking, causing the entire composite board to collapse and rupture; there are also some flame-retardant EPS boards. Insulation board, the method is to melt the preferred flame retardant with polystyrene, and then make it into particle foam molding. Large limitations, the flame retardant effect is not ideal, it can only reach B1 level
[0004] In addition, melamine-formaldehyde resin is a thermosetting resin, which has the properties of flame retardancy, water resistance, heat resistance, aging resistance and chemical corrosion resistance; but in the reaction of melamine and formaldehyde, six of the three amino groups on the melamine triazine ring Hydrogen atoms may be replaced by methylol in formaldehyde, which is easy to form a three-dimensional structure with a high degree of crosslinking; and the triazine ring is a heterocyclic ring similar to a benzene ring, which has greater rigidity, and the triazine ring The methylene groups of a carbon atom are connected to each other, the cross-linking density is high, the internal deformability of the molecule is small, and the rigidity is large. The material made is hard and brittle, easy to crack, poor in mechanical properties, and low in strength; directly mix melamine formaldehyde Resin used in EPS insulation board cannot meet the requirements of mechanical properties of the board

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A modified melamine-formaldehyde resin-based EPS flame-retardant insulation board, the preparation method of which is as follows:

[0038] (1) Preparation of modified melamine formaldehyde resin

[0039]Add 550 parts of 37% formaldehyde aqueous solution to the reaction kettle, stir, adjust the pH value to 9.3 with 4.5 parts of 30% aqueous sodium hydroxide solution, add 250 parts of melamine and 50 parts of benzomelamine, start to heat up, and raise the temperature to 80 within 30 minutes ℃, incubate at 80±2℃ for 20 minutes. Add 20 parts of polyethylene glycol 600 aqueous solution and continue to keep warm for 20 minutes. Cool down to 55°C, add 60 parts of methanol, adjust the pH value to 6 with 3.4 parts of 30% dilute sulfuric acid, and keep the temperature for 30 minutes. Use 6 parts of 30% sodium hydroxide aqueous solution to adjust the pH value to 10, heat up to 85 degrees Celsius, keep warm for 30 minutes, cool down, discharge, and set aside;

[0040] (2) Prepara...

Embodiment 2

[0043] A modified melamine-formaldehyde resin-based EPS flame-retardant insulation board, the preparation method of which is as follows:

[0044] (1) Preparation of modified melamine formaldehyde resin

[0045] Add 420 parts of 37% formaldehyde aqueous solution to the reaction kettle, stir, adjust the pH value to 7.8 with 5 parts of 30% triethanolamine, add 200 parts of melamine and 60 parts of benzomelamine, start to heat up, and raise the temperature to 75°C within 30 minutes. Incubate at 75±2°C for 20 minutes. Add 30 parts of 10% polyvinyl alcohol 1788 aqueous solution and keep warm for 30 minutes. Cool down to 60°C, add 50 parts of n-butanol, adjust the pH value to 6 with 6 parts of formic acid, and keep the temperature for 30 minutes. Use 7 parts of 30% triethanolamine to adjust the pH value to 10, heat up to 85 degrees Celsius, keep warm for 30 minutes, cool down, discharge, and set aside;

[0046] (2) Preparation of modified melamine-formaldehyde resin-based EPS flam...

Embodiment 3

[0049] A modified melamine-formaldehyde resin-based EPS flame-retardant insulation board, the preparation method of which is as follows:

[0050] (1) Preparation of modified melamine formaldehyde resin

[0051] Add 600 parts of 37% formaldehyde aqueous solution to the reaction kettle, stir, adjust the pH value to 10 with 2.5 parts of 30% hexamethylenetetramine and 3 parts of diethanolamine, add 275 parts of melamine and 55 parts of benzomelamine, and start to heat up. The temperature was raised to 83°C within 30 minutes, and kept at 83±2°C for 30 minutes. Add 25 parts of polyethylene glycol 800 aqueous solution and continue to incubate for 25 minutes. Cool down to 50°C, add 70 parts of amyl alcohol, adjust the pH value to 5.8 with 4.5 parts of 30% dilute sulfuric acid, and keep warm for 25 minutes. Use 6 parts of 30% sodium hydroxide to adjust the pH value to 10, raise the temperature to 85°C, keep it warm for 30 minutes, cool down, discharge, and set aside;

[0052] (2) Pr...

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PUM

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Abstract

The invention discloses a modified melamine formaldehyde resin-based EPS flame retardant thermal insulating board and a preparation method thereof. The modified melamine formaldehyde resin-based EPS flame retardant thermal insulating board is prepared by using modified melamine formaldehyde as binder and polystyrene foaming particles as foaming thermal insulating materials under certain process conditions. The flame retardant thermal insulating board has the advantages that the combustion performance of the flame retardant thermal insulating board can reach level A, combustion, collapse and dripping can be prevented when the board is grilled by open fire, and the potential fire hazard of outer wall outer thermal insulation is eliminated; the board has excellent thermal insulation performance and mechanical strength; the board can be fixed on the outer building envelope structure by means of adhesives, fixing anchor bolts, hot galvanizing zinc wire mesh, and the like to perform thermal insulation.

Description

technical field [0001] The invention relates to an EPS flame-retardant insulation board, in particular to a modified melamine-formaldehyde resin-based EPS flame-retardant insulation board and a preparation method thereof, belonging to the technical field of building material manufacturing. Background technique [0002] At present, the organic insulation materials used for external insulation of building exterior walls mainly include molded polystyrene foam board (EPS), extruded polystyrene foam board (XPS), rigid polyurethane foam board (PU), and phenolic foam board (PF). )Wait. Among them, the price of rigid polyurethane foam board has been high and it is difficult to promote it on a large scale; phenolic foam board is also unable to become a mainstream product in the short term due to its high density, low overall strength, and uneven quality of domestic products; polystyrene foam, extrusion board, etc. Plastic polystyrene foam is the most widely used in the external insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04B1/80E04B1/94C08L61/32C08L25/06C08L1/26C08G12/42C08G12/40C08G12/32C08G12/30
Inventor 陈晓龙李聚刚杨彰堂赵长才
Owner SUZHOU INST OF BUILDING SCI GRP CO LTD
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