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Steelwork fire-retardant paint using self-crosslinking silicone-acrylic compound emulsion as substrate and preparation thereof

A composite emulsion and fireproof coating technology, which is applied in fireproof coatings, coatings, etc., can solve the problems that the fire resistance limit cannot meet the requirements, and there is no substantial breakthrough in quality problems, so as to improve the film-forming performance of the emulsion, good thermal stability, The effect of high bond strength

Inactive Publication Date: 2008-06-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] So far, domestic high-quality fire retardant coatings are all solvent-based. Although water-based fire retardant coatings have been studied for many years, there has been no substantial breakthrough in quality problems.
At present, the matrix resin used in water-based fireproof coatings is generally polyacrylate emulsion, and the fire resistance limit cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Please refer to the 4 fire retardant coating formulations of the present invention listed in Table 1. First, according to formula 1 in Table 1, first add polyorganosiloxane emulsion and self-crosslinking polyacrylate emulsion into the mixing tank, after stirring evenly, add fire prevention additives (ammonium polyphosphate, melamine phosphate, melamine, pentaerythritol) , filler (titanium dioxide, sepiolite and aluminum silicate fiber) and film-forming aid propylene glycol, after stirring for 30 minutes, put it into a sand mill and grind it together, then add the pre-foaming agent, mix evenly, and discharge into barrels. The performance of the fire retardant coating of the present invention obtained is shown in formula 1 of table 2.

Embodiment 2

[0061] According to formula 2 in Table 1, first add polyorganosiloxane emulsion and self-crosslinking polyacrylate emulsion into the mixing tank, after stirring evenly, add fire prevention additives (ammonium polyphosphate, melamine phosphate, melamine, pentaerythritol), filler (titanium dioxide, kaolin and aluminum silicate fiber) and propylene glycol, after stirring for 30 minutes, put it into a sand mill and grind it once, then send it to a ball mill and grind it for 30 minutes, then add the foaming agent in the early stage, mix evenly, and discharge it into a barrel. The performance of the fire retardant coating of the present invention obtained is shown in formula 2 of table 2.

Embodiment 3

[0063] According to the formula 3 in Table 1, first add the polyorganosiloxane emulsion and the self-crosslinking polyacrylate emulsion into the mixing tank, stir evenly, add the fire prevention aid (ammonium polyphosphate, melamine phosphate, melamine, pentaerythritol), filler ( Titanium dioxide, sepiolite and aluminum silicate fiber) and propylene glycol, stirred for 30 minutes, put into a ball mill to grind together, then added the pre-foaming agent, mixed evenly, and discharged into barrels. The properties of the fire retardant coating of the present invention are shown in formula 3 of table 2.

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PUM

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Abstract

The invention relates to the fire retardant coating technical field, in particular to steel-structure fire retardant coating taking self-crosslinkable silicone-acrylate composite emulsion as substrate as well as a preparation method thereof. The invention adopts polysiloxanes and self-crosslinkable polyacrylate composite emulsion as film-forming materials; moreover, based on the commonly used composite fire retardant comprising ammonium polyphosphate, melamine and pentaerythritol, melamine phosphate and early stage foaming agent with excellent carbonizing and foaming performances are added in the fire retardant coating, thereby greatly increasing the foaming capacity of the coating with the thickness of the foaming layer 20 times to 35 times of the prior coating; meanwhile, titanium pigment, sepiolite and aluminium silicate fiber are adopted as high temperature resistant filler, and propylene glycol is adopted as film-forming auxiliary agent; in addition, the fire endurance of the formed fire retardant coating can reach 90min (when coating thickness is 2mm). The coating has simple preparation method, no pollution, low cost and wide application.

Description

technical field [0001] The invention belongs to the technical field of fireproof coatings, and in particular relates to a fireproof coating for steel structures with a self-crosslinking silicon-acrylic composite emulsion as a matrix and a preparation method thereof. Background technique [0002] There are two main types of fire retardant coatings for steel structures at home and abroad: non-intumescent fire retardant coatings and intumescent fire retardant coatings. The former has poor fire prevention effect and has been gradually eliminated. There are many types of intumescent fireproof coatings for steel structures, which can be divided into three types according to their material forms: water-based, solvent-based and powder-based; according to the thickness of the coating, they can be divided into three types: thick type, thin type and ultra-thin type; The fire prevention mechanism can be divided into three types: insulation type, expansion type and non-expansion type. ...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D5/18C09D133/08
Inventor 许乾慰席劲王国建杨家云
Owner TONGJI UNIV
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