Injection Molding and Molding Compositions Therefore

An injection molding product resulting from the following steps:

• comminuting waste rubber into solid particles of dimensions sufficiently small to pass through an injection nozzle;
• melting plastic comprising at least one of high density polyethylene, polyethylene terephthalate, and polypropylene;
• once the plastic is melted, adding the comminuted solid waste rubber to the melted plastic, thereby minimizing the time that the waste rubber is exposed to high temperatures and generation of volatile organic compounds;
• blending the comminuted waste rubber with the melted plastic;
• maintaining temperatures greater than a maximum melting point temperature of the plastic, whereby the waste rubber remains in a solid state;
• and
• injecting the blended solid waste rubber and the melted plastic into an injection mold, wherein the resulting molded product is a homogeneous mixture of the plastic and the waste rubber, and wherein the time that the waste rubber is exposed to high temperatures and the generation of volatile organic compounds is minimized.