Sprayable environmentally friendly hot-melt pressure-sensitive adhesive and preparation method thereof

Abstract

The invention discloses an environment-friendly hot-melt pressure-sensitive adhesive capable of being sprayed and a preparation method thereof. The hot-melt pressure-sensitive adhesive comprises the following main components in percentage by weight: 20 percent of SIS (Styrene Isoprene Styrene) thermoplastic styrene isoprene copolymer rubber of which the melt index is 6, 8 percent of SBS (Styrene Butadiene Styrene) thermoplastic butadiene styrene rubber of which the melt index is 8, 7 percent of water-white hydrogenated rosin, 10 percent of white disproportionated hydrogenated rosin glycerol ester, 8 percent of pale yellow modified terpene resin, 5 percent of C5 petroleum resin, 7.5 percent of white tackifying resin, 3 percent of polyisobutene and 4 percent of sasol wax. The environment-friendly hot-melt pressure-sensitive adhesive disclosed by the invention contains no organic solvent, zero VOC (volatile organic compounds), no heavy metals and no smell, is totally green, environment-friendly and nontoxic, has the advantages of being excellent in adhesive property, large in peel strength, high in drying speed, long in opening time, glue-saving, convenient for construction, low in cost, fireproof, safe and the like, and is widely applied to upholstered furniture industries such as mattresses, sofas, swivel chairs, pillows, screens and the like as well as sanitation product industries such as diapers, sanitary towels and the like, especially suitable for application in Europe and America environment-friendly high-grade export products and products for children.

Description

technical field [0001] The present invention relates to an adhesive and a preparation method thereof, more specifically to an environmentally friendly hot-melt pressure-sensitive adhesive that can be used for spraying and a preparation method thereof, which can be widely used in soft objects such as mattresses, sofas, swivel chairs, pillows, and screens. The furniture industry and sanitary product industries such as paper diapers and sanitary napkins are especially suitable for the application of European and American green and environmental protection high-end export products and children's products. Background technique [0002] Hot-melt pressure-sensitive adhesives are currently one of the most environmentally friendly adhesive varieties in the world, and a large number of hot-melt pressure-sensitive adhesives currently used in the Chinese market are only suitable for traditional and conservative construction methods such as gluing, brushing, roller gluing, and dispensing....

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Problems solved by technology

[0003] Moreover, the domestic glue spray market is still dominated by low-end solvent-based glue spray applications. A large number of organic solvents, including toxic halogenated hydrocarbons and triphenyl (benzene, toluene, xylene) solvents, enter the air during construction, which consumes A large number of increasingly tense petroleum and oil resources have seriously affected people's living environment and health; although the country began to implement the national standard GB 18583-2008 (mandatory limit standard for harmful substances in adhesives for interior decoration materials) on September 1, 2009 , but the limit for triphenyl and halogenated hydrocarbons is still too loose, for example: toluene + xylene ≤ 15%, low-toxic halogenated hydrocarbon methylene chloride ≤ 5%, plus the VOC emission of solvent-based spray glue is large, According to the high standard requirements of environmental protection in western developed countries such as Europe, America and Japan, the national standard of GB 18583-2008 is far from enough

Although the national environmental protection department and the National Standards Committee have issued more stringent environmental protection standards, the technical requirements for the certification of adhesive environmental labeling products HJ / T 220-2005, the focus is on stricter limits for triphenyl, halogenated hydrocarbons, acetone, etc. , for example: pure benzene ≤ 0.2%, toluene + xylene ≤ 0.2%, halogenated hydrocarbons ≤ 0.2%, acetone ≤ 0.75‰, heavy metals (lead, cadmium, mercury, chromium) ≤ 0.5‰, etc., but meet the environmental standard certification Solvent-based adhesives still have relatively large VOC emissions, and the standard is limited to VOC≤750g / L (the limit is too loose). Therefore, solvent-based spray adhesives that meet the environmental labeling product standards are not currently the most environmentally friendly adhesive products. Some high-end fields It is still difficult to meet the high standard requirements of zero VOC for environmental protection in Western developed countries such as Europe, America and Japan. Therefore, in response to the strong requirements of international and domestic high-end environmental protection fields, the development of solvent-free and completely environmentally friendly high-efficiency adhesives has become an urgent requirement for the progress of the times.

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