Low-temperature automobile expansion adhesive and preparation method thereof

Abstract

The invention discloses a low-temperature automobile expansion adhesive. The low-temperature automobile expansion adhesive is made of the following raw materials in parts by weight: 100 parts of a polymer, 3-5 parts of a peroxide vulcanization agent, 0.5-3 parts of a vulcanization auxiliary agent, 5-15 parts of a foaming agent, 0.5-8 parts of a foaming activator, 1-10 parts of a filler, 2-15 partsof a tackifier, 0.5-3 parts of a lubricant, 0-2 parts of an antioxidant, and 0-10 parts of a flame retardant. According to the low-temperature automobile expansion adhesive, the raw material composition is carefully chosen, the content of each raw material is optimized, and the prepared low-temperature automobile expansion adhesive has high foaming ratio and small product density, and can fill large cavities. The expansion adhesive has high bonding strength with an ABS framework member. The expansion adhesive has good high-temperature baking stability. The expansion adhesive after foaming isnot easy to collapse and shrink. The low-temperature foaming performance and high-temperature foaming ratio are well balanced. The storage stability is good, the product quality is stable, and a storage period is relatively long.

Description

technical field [0001] The invention relates to the field of expansion rubber, in particular to a low-temperature automobile expansion rubber and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, people's living standards have been greatly improved, and various high-end passenger cars have become family necessities. There is a large gap in engine technology between self-owned brands and foreign-funded brand cars, resulting in self-owned brands in the mid-to-high-end market. Frustrated one after another. Increasing investment in research and development, improving the ride comfort of automobiles, and controlling production costs have become top priorities. Among the many parameters of the car, NVH (Noise, Vibration, Harshness) has received great attention, because the bypass cavity of the car body will generate high-speed airflow when driving at high speed, resulting in strong noise and vibration. [0003] The cu...

AI Technical Summary

Problems solved by technology

[0004] (1) The expansion ratio of traditional expansion rubber is low, the product density is high, and it cannot fill large cavities;

[0005] (2) The bonding strength between the expansion rubber and the aluminum sheet and the ABS skeleton is too low, and the problem of sagging and peeling is prone to occur under the process conditions;

[0006] (3) The high-temperature baking stability is poor, and the expansion rubber after foaming is prone to collapse and shrinkage;

[0008] (5) The coordination between low-temperature foaming performance and high-temperature foaming ratio is a difficult problem in the industry, and companies are struggling to balance between the two

[0009] (6) The storage stability is poor, the product quality is unstable, and the storage period is short. The company cannot set a reasonable safety inventory, and the production capacity cannot complete the order in time.

Images