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Fireproof coating

A kind of fire-proof coating and fire-proof technology, applied in fire-proof coating, polyurea/polyurethane coating, coating, etc., can solve the problems of poor dispersion effect, lower stability of polymer micelles, lower production efficiency, etc., and achieve a higher ratio Effect of surface area, achieved water loss and water retention properties

Active Publication Date: 2021-10-08
石家庄易辰防火保温材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the applicant has found that there are multiple problems in the coating or fireproof board slurry that has added a large amount of sepiolite fibers: (1) Compared with flame retardants such as expanded vermiculite, magnesium hydroxide, and antimony trioxide, its flame retardant performance It needs to be further improved; (2) During the drying and curing process of coating or fireproof board, the drying time is too long, which greatly reduces the production efficiency. This is because sepiolite has good water absorption and water retention, and the sepiolite after water absorption Form a water-blocking barrier to prevent the diffusion of water from the inside to the outside surface, causing the surface of the paint film and fireproof board to dry out, but the actual interior is not dry, that is, although the surface is fast, it takes a long time to dry; (3) in In the actual production process, when a large amount of sepiolite is added, the viscosity of the system will increase sharply, which will destroy the stability of the dispersion system, resulting in prolonged dispersion time, reduced production efficiency, and poor dispersion effect.
Taking fireproof coatings as an example, this is because sepiolite itself also has the function of a thickener. When it enters water, it will quickly absorb water and flocculate. The well-dispersed pigments and fillers are reunited, and the stability of the polymer micelles is reduced, and in severe cases, sedimentation will occur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The present embodiment provides a fireproof sepiolite fiber slurry, which comprises the following parts by weight: 30 parts of modified sepiolite wool, 5 parts of talcum powder, 12 parts of vegetable rubber powder, 15 parts of polypropylene fiber, 3 parts of cellulose ether, 2 parts of surfactant, 80 parts of deionized water, its preparation method is:

[0031] (1) Preparation of modified sepiolite wool: acid activation: mix sepiolite and acid solution according to the ratio of solid to liquid weight ratio of 1:1.5, stir for 12 hours, and the volume fraction of acid solution is 2% mixed acid to obtain sepiolite slurry 1; wherein, the mixed acid is a mixture of hydrochloric acid and phosphoric acid, and its molar ratio is 1:1;

[0032] (2) Alkali neutralization: the first sepiolite slurry after acid activation is mixed with ammonia according to the ratio of solid-to-liquid weight ratio of 1:1.5, and stirred for 12 hours to obtain the second sepiolite slurry, wherein , t...

Embodiment 2

[0035] On the basis of Example 1, step (1) changes sepiolite and acid liquid according to the ratio of solid-to-liquid weight ratio from 1:1.5 to the ratio of 1:2 according to the solid-to-liquid weight ratio, and the other preparation steps are the same to obtain Fireproof sepiolite fiber slurry B

Embodiment 3

[0037] On the basis of Example 1, hydrochloric acid in step 1 was replaced with sulfuric acid, and other preparation steps were the same to obtain fireproof sepiolite fiber slurry C.

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PUM

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Abstract

The invention provides a fireproof coating, and belongs to the field of fireproof building materials. The fireproof coating comprises the following components in percentage by weight: 40-60% of water-based resin emulsion, 5-20% of fireproof sepiolite fiber slurry, 10-30% of a coating additive and other fillers, and 10-30% of water. A preparation method of the slurry comprises the following steps: (1) preparing modified sepiolite fabric: mixing sepiolite with a mixed acid solution 1 of hydrochloric acid and phosphoric acid; (2) conducting alkali neutralization: mixing the sepiolite slurry subjected to acid activation with ammonia water; and (3) sequentially adding talcum powder, vegetable gelatin powder, polypropylene fibers, cellulose ether and a surfactant into the sepiolite slurry while stirring to obtain the fireproof sepiolite fiber slurry. The fireproof coating has good fireproof performance.

Description

technical field [0001] The invention relates to a fireproof coating, and specifically discloses a fireproof coating using modified sepiolite fiber slurry as a functional component. Background technique [0002] Intumescent fireproof coatings are mainly used for fireproofing steel structures. The development of economy and society has promoted the development of the construction industry. Large-scale buildings such as exhibition halls, terminal buildings, large shopping malls, stadiums, high-end hotels and industrial plants are increasing, and are moving towards Large and beautiful, the main load-bearing components are mostly steel structures. [0003] For this reason, the fire protection of steel structures has attracted more and more attention. Although steel is a non-combustible material, its fire resistance is far worse than that of masonry structures and reinforced concrete structures. As the temperature rises, the mechanical strength of steel will decrease. When the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/18C09D7/61C09D7/65C09D7/62
CPCC09D175/04C09D5/185C09D7/61C09D7/65C09D7/62C09D7/70C08L2205/16C08L2201/02C08L5/00C08L23/12C08K9/02C08K3/34C08K7/26
Inventor 薛永刚赵艳丽李杰桑绍雷李严
Owner 石家庄易辰防火保温材料有限公司
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