Environment-friendly sealing sponge for automobile air conditioner and preparation method thereof

Abstract

The invention discloses environment-friendly sealing sponge for an automobile air conditioner and a preparation method thereof, and relates to the technical field of air conditioner sealing sponge. The environment-friendly sealing sponge for the automobile air conditioner is prepared from the following raw materials in parts by weight: 80-95 parts of bio-based EPDM, 10-15 parts of polylactic acid fiber, 30-40 parts of carbon black, 1-2 parts of stearic acid, 1-2 parts of zinc oxide, 30-40 parts of kaolin, 25-35 parts of heavy calcium carbonate, 1-3 parts of cashew nut shell oil, 1-2 parts of a foaming agent AC, 1-2 parts of a foaming agent OBSH, 1-2 parts of an accelerant PZ, 1-2 parts of an accelerant NS, 2-4 parts of PEG4000, 1-2 parts of a silane coupling agent, 2-3 parts of sulphur, 1-2 parts of DCP and 1-2 parts of a stabilizer. The environment-friendly sealing sponge for the automobile air conditioner uses the bio-based EPDM as a raw material, so that dependence on a petroleum resource is reduced and the environment-friendly sealing sponge is environment-friendly and renewable; the added biodegradable polylactic acid fiber can further improve the strength and the elasticity of the material; through a reasonable matching ratio of the components, the prepared material is better in performance, high in tensile strength, low in volume weight and small in permanent deformation, and a requirement on the sealing performance of the automobile air conditioner can be met better.

Description

technical field [0001] The invention relates to the technical field of air conditioner sealing sponges, in particular to an environmentally friendly sealing sponge for automobile air conditioners and a preparation method thereof. Background technique [0002] Air-conditioning sealing sponge is an indispensable product in the car. It is mainly used for sealing the air-conditioning outlet, the joint between the air outlet and the air duct, the seal at the HVAC, the seal at the joint between the core and the shell, etc., to control the reasonable distribution of air volume. , cushioning, and shockproof functions, the requirements for sealing sponges include oil resistance, cold resistance, aging resistance, high strength, and not easily deformed. [0003] Polyurethane is the most common polymer material in life, and it is widely used in the production of various sponge products. Polyether polyols are used as raw materials in the production and preparation of polyurethane spong...

AI Technical Summary

Problems solved by technology

Polyether polyols are used as raw materials in the production and preparation of polyurethane sponges. However, petroleum-based polyether polyols are usually used in the production and preparation of polyurethane sponges. The polyurethane produced has high stability and is difficult to decompose in a natural state; It is not degradable, which is not conducive to environmental protection and sustainable development. With the expansion of the application field of sponge products, the market needs a large amount of sponge supply, resulting in serious environmental burdens, but there are many performance defects in other existing air-conditioning sealing sponges.