High-expansion fireproof sealant and preparation thereof

Abstract

The invention discloses high intumescent fire stopping mastic and a method for preparing the same. The mastic is prepared by taking acrylate emulsion (or elastic styrene-acrylate emulsion), polybutene (or polyisobutylene), glycol, emulsifying agent and tritolyl phosphate as base materials with addition of certain auxiliary materials. The preparation method is as follows: the base materials are added into a reaction kettle according to certain mass portion, stirred, slowly heated and insulated for a period of time, and transferred into a colloid stirrer; auxiliary materials such as ammonium polyphosphates, flame-retarding aluminum hydroxide, flame-retarding zinc borates, calcium carbonates, expandable graphite, iron oxide red and glass fibers are gradually added into the mixture under the condition of stirring; and the process of stirring is continued until a colloid is uniform. The fire stopping mastic prepared by adoption of the method can be quickly carbonized and expanded to 5 to 8 times of the prior volume in case of fire, and can not fall off; the strength and the heat insulation after solidification are good, and the fire resistance is very good; and the adhesion is strong and the elasticity is good. The high intumescent fire stopping mastic and the method are particularly suitable for fire compartmentation of various penetrating penetration assemblies such as cables, cable bridges, pipes and so on.

Description

Technical field [0001] The invention relates to a polymer fireproof plugging material and a preparation method thereof, in particular to a high-expansion fireproof sealant and a preparation method thereof. Background technique [0002] Fire-proof sealing material (fire-proof sealant) is mainly used for the fire-proof separation of various penetrating parts such as cables, air pipes, oil pipes, air pipes, etc. when they pass through the walls and floors and form various openings and cable trays. [0003] There are many fireproof sealants and their manufacturing methods, but most of the fireproof sealing materials have poor adhesion and elasticity. When the penetration is affected by external factors such as temperature changes, vibration, etc., it is easy to cause the fireproof sealing material and the penetration or opening A gap is formed between the walls, causing fire failure and the need to replace the sealing material, which is expensive. For example, China Patent No. 031174...

AI Technical Summary

Problems solved by technology

[0003]There are many fireproof sealants and their manufacturing methods at present, but most of the fireproof sealing materials have poor adhesion and elasticity, and the penetrating parts are affected by external factors such as temperature changes , vibration, etc., it is easy to form a gap between the fireproof sealing material and the penetration part or the opening wall, resulting in fire failure and the need to replace the sealing material, which is expensive

For example, Chinese patent No. 03117403.5 discloses a "neutral silicone fireproof sealant and its manufacturing method". Although its flame retardant silicone sealant can be flame retardant, it has poor expansion when encountering fire. If there are penetrating parts or When a gap is formed between the opening walls, the fire-proof and flame-retardant sealing effect is not good; another example is No. 200610039175.9 Chinese patent, which discloses a kind of "expandable fire-proof glue", which has expansion flame-retardant ingredients such as expanded graphite in its components. The flame retardant expansion effect is good, but the protection of the expanded carbon layer is lacking in glass fiber, etc., and the loose expanded carbon layer is easy to be produced when the fire is fired, and the expanded carbon layer is easy to fall off when the expansion volume is too large

And the preparation process of these sealants is more complicated, and the production cost is higher