Polyurethane adhesive and prepreg thereof for manufacturing plastic athletic track

Abstract

A polyurethane adhesive and a mixture used for manufacturing a plastic athletic track are provided. The polyurethane adhesive includes a urethane pre-polymer which is formed by a reaction between an isocyanate and a polyol. The polyol is selected from the group consisting of polyether polyol and polybutadiene polyol, and a number average molecular weight of the polyol is between 1,000 g / mole and 6,000 g / mole. Based on the total weight of the polyurethane adhesive, a content of the urethane pre-polymer is between 80 wt % and 99.5 wt %, and a viscosity of the polyurethane adhesive is between 1,000 cps and 3,000 cps under an environmental temperature of between 15 DEG C. and 40 DEG C.

Description

technical field [0001] The invention relates to a polyurethane adhesive, in particular to a polyurethane adhesive for making plastic runway and its prepreg. Background technique [0002] The existing adhesives used to make plastic runways are mainly two-component polyurethane adhesives (or called two-component polyurethane adhesives). Although single-component adhesives are used, they will also cause many problems due to the addition of chain extenders. . The above-mentioned problems include: due to the high viscosity of the adhesive, it is not easy to completely wet the plastic particles; the prepreg formed by mixing the adhesive with the plastic particles is not easy to level when the prepreg is laid on the runway, and the thickness is uniform The problem of poor performance; or, after the adhesive is hardened, the rubber particles are easily peeled off from each other due to poor adhesion between rubber particles. Based on the above problems, the plastic runway made by ...

AI Technical Summary

Problems solved by technology

[0002] The existing adhesives used to make plastic runways are mainly two-component polyurethane adhesives (or called two-component polyurethane adhesives). Although single-component adhesives are used, they will also cause many problems due to the addition of chain extenders.

The above-mentioned problems include: due to the high viscosity of the adhesive, it is not easy to completely wet the plastic particles; the prepreg formed by mixing the adhesive with the plastic particles is not easy to level when the prepreg is laid on the runway, and the thickness is uniform The problem of poor performance; or, after the adhesive is hardened, the rubber particles are easily peeled off from each other due to poor adhesion between rubber particles

Based on the above problems, the plastic track made by the existing polyurethane adhesive has the defects of poor quality and short service life

[0003] That is to say, the existing polyurethane adhesives generally have the problems of high adhesive viscosity, difficulty in fully wetting with plastic particles, and short construction time. Furthermore, due to the addition of existing polyurethane adhesives Harmful substances such as plasticizers, chain extenders, and volatile organic solvents are removed, so most of the existing polyurethane adhesives do not meet the requirements of environmental protection

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