Colored polyurethane foam sealant as well as preparation method and application thereof

Abstract

The invention belongs to the field of polyurethane foam sealants and in particular relates to a colored polyurethane foam sealant as well as a preparation method and application thereof. The colored polyurethane foam sealant is prepared from the following components in parts by mass: 30 percent to 40 percent of paraffin wax, 10 percent to 30 percent of polyether polyol, 20 percent to 40 percent of polymethylene polyphenyl isocyanate (MDI), 2 percent to 5 percent of a stabilizer, 2 percent to 5 percent of a catalyst, 2 percent to 5 percent of a solvent and 5 percent to 10 percent of pigment. The preparation method of the colored polyurethane foam sealant comprises the following steps: mixing the components in an environment of 20 DEG C to 50 DEG C and stirring until all the components are completely dissolved; adding a mixture and the solvent into a pressure-resisting container at a certain ratio under the condition that dimethyl ether gas is fed, and sufficiently shaking to obtain a finished product. The colored polyurethane foam sealant has the beneficial effects that the colored polyurethane foam sealant is used for rockworks, artificial stones and artificial driftwoods in the field of manufacturing and decoration and the field of aquascapes; the pigment is blended so that the color is very consistent to a real landscape and the landscape is vivid; the colored polyurethane foam sealant is safe and reliable and has strong plasticity, so that the aquascape cost is reduced.

Description

technical field [0001] The invention belongs to the field of polyurethane foam caulking agent, and in particular relates to a colored polyurethane foam caulking agent and its preparation method and application. Background technique [0002] The full name of polyurethane foaming agent is one-component polyurethane foam caulking agent, commonly known as foaming agent, styrofoam, and PU caulking agent. It is the product of the cross combination of aerosol technology and polyurethane foam technology. It is a special polyurethane product filled with polyurethane prepolymer, blowing agent, catalyst and other components in a pressure-resistant aerosol can. When the material is sprayed from the aerosol can, the foamy polyurethane material will expand rapidly and react with the air or the moisture in the contacted substrate to form a foam. The cured polyurethane foam sealant foam has multiple effects such as caulking, bonding, sealing, heat insulation, and sound absorption. It is an...

AI Technical Summary

Problems solved by technology

[0003] At present, polyurethane foam sealant is also often used in the aquarium field, mainly used for filling gaps, fixing sunken wood or rockery, etc. The reason that affects the expansion of its use range is that its own color cannot be integrated with aquatic plants and rockery. The color is dull and unnatural, and it can only maintain the original color (white or light yellow) of the polyurethane foam sealant, and cannot change the color. At present, to change its color, it is usually painted after it is cured. time, increase the cost of use, and the color is not uniform, resulting in unsightly landscaping

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