阅读说明：本技术 一种介孔材料复合钢结构防火涂料及其制备方法 (Mesoporous material composite steel structure fireproof coating and preparation method thereof ) 是由 栾玉成 秦军 周涛 于 2020-06-09 设计创作，主要内容包括：本发明涉及一种介孔材料复合钢结构防火涂料及其制备方法,按照比例称取适量的水,边搅拌然后将粘结剂、聚磷酸铵、三聚氰胺、季戊四醇、氢氧化铝、红外遮光剂、介孔材料、增稠剂等材料依次加入,搅拌即可得到一种介孔材料复合钢结构防火涂料。本发明是首次将有序介孔材料应用于膨胀型钢结构防火涂料中,并采用了多种红外遮光剂,有效阻隔了火灾时的热量传递,进一步提高了防火涂料的耐火极限。(The invention relates to a mesoporous material composite steel structure fireproof coating and a preparation method thereof. The invention applies the ordered mesoporous material to the intumescent steel structure fireproof coating for the first time, and adopts a plurality of infrared opacifiers, thereby effectively blocking the heat transfer in fire and further improving the fire resistance limit of the fireproof coating.)

1. The fireproof coating for the mesoporous material composite steel structure is characterized by comprising the following components in parts by mass:

20-50 parts of binder

10-30 parts of ammonium polyphosphate

5-20 parts of melamine

5-20 parts of pentaerythritol

5-15 parts of aluminum hydroxide

2-25 parts of infrared light-screening agent

0.01-20 parts of mesoporous material

0.1-3 parts of thickening agent

10-30 parts of water.

2. The fireproof coating of claim 1, wherein the binder is at least one of styrene-acrylic emulsion, epoxy emulsion, and silicone resin emulsion.

3. The mesoporous material composite steel structure fireproof coating of claim 1, wherein the mesoporous material is ordered mesoporous material powder, and is silicon-based or non-silicon-based ordered mesoporous material powder.

4. The fireproof coating of claim 1, wherein the mesoporous material has a bulk density of 100-300 kg/m³And all particles are surface treated.

5. The fireproof paint of claim 1, wherein the infrared opacifier is carbon black or TiO₂Zircon, potassium hexatitanate whisker, SiC and Fe₃O₄、B₄C, and is powder.

6. The fireproof paint of claim 1, wherein the thickening agent is cellulose ether.

7. A preparation method of a mesoporous material composite steel structure fireproof coating is characterized by weighing a proper amount of water according to a proportion, stirring, then sequentially adding the materials except water, and stirring to obtain the mesoporous material composite steel structure fireproof coating.

Technical Field

The invention belongs to the field of materials, and particularly relates to a mesoporous material composite steel structure fireproof coating and a preparation method thereof.

Background

The steel structure system has the advantages of flexible structure form, light dead weight, high strength, easy installation, short construction period, good anti-seismic performance, easy maintenance, less environmental pollution and the like, is widely applied to large buildings such as gymnasiums, exhibition halls, industrial factory buildings and the like, and is known as a green building in the 21 st century. But the fire-proof steel structure has fatal defect in the aspect of fire prevention, the mechanical property begins to be reduced when the temperature of the steel structure reaches 250 ℃, the mechanical property basically dissipates when the temperature of the steel structure reaches 500 ℃, and the static bearing capacity of the steel structure basically dissipates when the temperature reaches 600 ℃. The fire temperature can reach more than 800 ℃ within 20 minutes. At such high temperature, the exposed steel structure can be subjected to plastic deformation quickly, local damage is generated, and the overall collapse and failure of the steel structure are caused.

At present, the fire prevention measures for the steel structure mainly adopt the method of coating fire-proof paint on the surface of the steel structure for protection. The steel structure fire-retardant coating can be classified into an intumescent type and a non-intumescent type according to the fire-retardant mechanism. The non-intumescent fire-retardant coating mainly takes inorganic materials as main materials, has low price, thicker coating and long fire-retardant time, but has the defects of heavy weight, large using amount, easy shedding and complex construction process; the expansion type fireproof coating generally takes a polymer binder as a base material, is matched with a flame retardant, an additive and the like, has thin coating and good adhesive force and durability, can expand and foam when being fired, and delays the temperature rise of a steel structure by a fireproof heat insulation layer formed by expansion and foaming to protect the steel structure. However, although the fire resistance limit of the intumescent fire-retardant coating can also meet the national standard requirements, the intumescent fire-retardant coating is far lower than that of a non-intumescent fire-retardant coating and has certain defects.

Disclosure of Invention

Aiming at the problems of the existing fireproof coating, the invention develops the mesoporous material composite steel structure fireproof coating, and compared with the traditional expansion type steel structure fireproof coating, the fireproof coating further prolongs the fireproof limit on the premise of no change of other properties.

A fireproof coating for a mesoporous material composite steel structure comprises the following components in parts by weight:

20-50 parts of binder

10-30 parts of ammonium polyphosphate

5-20 parts of melamine

5-20 parts of pentaerythritol

5-15 parts of aluminum hydroxide

2-25 parts of infrared light-screening agent

0.01-20 parts of mesoporous material

0.1-3 parts of thickening agent

10-30 parts of water

Wherein, the binder is at least one of styrene-acrylic emulsion, epoxy emulsion and organic silicon resin emulsion.

The mesoporous material is ordered mesoporous material powder, and is silicon-based or non-silicon-based ordered mesoporous material powder. The stacking density of the mesoporous material is 100-300 kg/m³And all particles are surface treated.

The infrared opacifier is carbon black and TiO₂Zircon, potassium hexatitanate whisker, SiC and Fe₃O₄、B₄C, and is powder.

The thickening agent is cellulose ether.

A preparation method of a mesoporous material composite steel structure fireproof coating comprises the steps of weighing a proper amount of water according to a proportion, stirring, then sequentially adding the materials except the water, and stirring to obtain the mesoporous material composite steel structure fireproof coating.

The invention applies the ordered mesoporous material to the intumescent steel structure fireproof coating for the first time, and adopts a plurality of infrared opacifiers, thereby effectively blocking the heat transfer in fire and further improving the fire resistance limit of the fireproof coating.

Detailed Description