Polyurethane foam for heat insulation and sound insulation of automobile engine

Abstract

The invention relates to polyurethane foam for heat insulation and sound insulation of an automobile engine. The foam is prepared by foaming of a component A and a component B, and the density of the polyurethane foam is 17 plus or minus 3kg / m<3>, wherein the component A comprises 100 parts by weight of polyether polyol and 20 parts by weight of graphite; the hydroxyl value of the polyether polyol is 120 plus or minus 10mgKOH / g, and the viscosity below 25 DEG C is 700 plus or minus 100mPa s; and the component B comprises 100 parts by weight of polyisocyanate, the content of NCO is 31 plus or minus 1%, and the viscosity below 25 DEG C is 200 plus or minus 50 mPa s. The product has good size stability after forming, and the foam in the uniform honeycomb-like cellular structure in a foam block has good sound absorption and heat insulation effects; the product has excellent extensibility and can meet the requirements in various aspects and the radian in the design; and the product can prevent the dust phenomenon, prevent harming a human body and meet the standard of VOC (volatile organic compounds) in the automobile industry.

Description

technical field [0001] The invention relates to a polyurethane foam used for heat and sound insulation of automobile engines. Background technique [0002] At present, glass wool is generally used as the heat and sound insulation material of automobile engines. Because the glass dust in glass wool is extremely small in size, it is easy to enter the human body and is not easily discharged by the human body. It is irritating to the skin, and people with sensitive skin will get red when they touch it At the same time, due to the addition of a large amount of phenolic resin and adhesive to the glass wool, the pungent odor is emitted during the molding process, the pollution is serious, and the VOC standard cannot be met. Contents of the invention [0003] The object of the present invention is to provide a polyurethane foam used for heat and sound insulation of automobile engines. [0004] The technical solution of the present invention is: a polyurethane foam used for heat a...

AI Technical Summary

Problems solved by technology

[0002] At present, glass wool is generally used as the heat and sound insulation material of automobile engines. Because the glass dust in glass wool is extremely small in size, it is easy to enter the human body and is not easily discharged by the human body. It is irritating to the skin, and people with sensitive skin will get red when they touch it At the same time, due to the addition of a large amount of phenolic resin and adhesive to the glass wool, the pungent smell is emitted during the molding process, the pollution is serious, and the VOC standard cannot be reached.