Flame retardation cladding adhesive for polystyrene prefoamed beads, and product thereof

Abstract

The invention provides a flame retardation cladding adhesive for polystyrene prefoamed beads, and a product thereof, and concretely relates to a flame retardation cladding adhesive specially used for cladding polystyrene prefoamed beads, and a modified polystyrene flame retardation foam sheet made by using the flame retardation cladding adhesive. The polystyrene prefoamed bead flame retardation cladding adhesive adopting modified urea formaldehyde resin with toughening and film forming performances as an adhesion medium has excellent flame retardation characteristic, and can effectively improve the flame retardation performance of a polystyrene foam material; and the modified urea formaldehyde resin with toughening and film forming performances adopted in the invention allows a weak acidic substance to be used as a curing agent of the flame retardation cladding adhesive, so damages of a strong acid curing agent similar to phenolic resin to human bodies, environment and apparatuses are avoided.

Description

technical field [0001] The patent of the present invention has invented a flame-retardant coating glue specially used for coating polystyrene pre-expanded beads and a modified polystyrene flame-retardant foam board made of this flame-retardant coating glue. Background technique [0002] Polystyrene foam material has a closed-cell honeycomb structure. It is this closed-cell structure that makes polystyrene insulation boards have excellent properties such as light weight, insulation, heat insulation, shock resistance, and sound insulation. They are widely used in construction, light industry, shipping and other fields. However, with the improvement of national requirements on the fire performance of building insulation materials, traditional polystyrene insulation boards have been difficult to meet the requirements of laws and regulations. Therefore, improving the fire performance of traditional polystyrene insulation materials and preparing flame-retardant polystyrene insula...

AI Technical Summary

Problems solved by technology

[0009] However, there are many problems in the modified polystyrene flame retardant foam material produced by the above-mentioned technology: as reported in US3590014, due to the lack of adhesive, the flame retardant film coated on the surface of polystyrene beads will inevitably Block the chemical or physical bonding between adjacent surfaces, thereby reducing the cohesive strength of modified polystyrene foam; although polyvinyl acetate is used as an adhesive to improve the cohesive strength of foam products according to CN1906236A reports, but due to polyvinyl acetate The flammability and easy hydrolysis of vinyl acetate itself reduce the flame retardancy and water resistance of polystyrene foam; and as reported in CN102414265A, compound adhesive with polyurethane and polyvinyl acetate, then further reduce the improvement. According to CN103172970A described using phenolic resin as adhesive, although the flame retardancy of phenolic resin itself is conducive to improving the flame retardancy of modified polystyrene foam, but the curing agent of phenolic resin It is usually a strong acid. When strong acid is added in the production process, it will exotherm violently and generate strong acidic steam, which will cause harm to the human body and severe corrosion to the equipment.

However, this brings about several other problems: First, the coating resin containing the curing agent will also be partially cross-linked during the drying process, thereby reducing the foaming (secondary foaming) in the molding process accordingly. The degree of crosslinking in the first stage, that is, reduces the cohesive energy, which leads to the reduction of the comprehensive performance of the modified polystyrene flame retardant foam; second, the drying process will lead to an increase in production energy consumption and a decrease in production efficiency; third, the bulky The fluidized drying bed increases equipment investment and production site

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