High-resilience closed flame-retardant foam silicon rubber material and preparation method thereof

Abstract

The invention discloses a high-resilience closed flame-retardant foam silicon rubber material. The high-resilience closed flame-retardant foam silicon rubber material is prepared from the following components in parts by weight: 40-60% of silicon rubber, 30-50% of additive, 0.5-2% of foaming agent, 1-3% of crosslinking agent, 0.5-2% of catalyst, 0.5-2% of inhibitor and 0.5-1.5% of coloring agent.

Description

technical field [0001] The invention relates to a silicone rubber foam material and a preparation method thereof, in particular to a high-resilience closed-cell flame-retardant silicone rubber foam material and a preparation method thereof. Background technique [0002] Under the background of energy constraints and environmental pollution, various automobile manufacturers also regard new energy vehicles as an important strategic direction to seize the commanding heights of the future automobile industry. As the core part of the entire new energy vehicle, the battery is also particularly important for its environmental sealing and shock-absorbing components. The high-resilience closed-cell flame-retardant silicone rubber foam can not only reduce the external vibration suffered by the battery, but also ensure the safety of the battery under cold and heat cycles. The expansion and contraction of the battery can provide stable performance for a long time, and it can also avoi...

AI Technical Summary

Problems solved by technology

The former can be realized at room temperature, the formula is simple, and the products produced are relatively single, and the products are cured by pouring molding or rubber production technology, which is difficult to achieve continuous production, so the product processing performance is poor and the application range is relatively narrow. and niche

Such as Chinese patent CN104559190A discloses a kind of preparation method of two-component foamed silica gel composite material, this method adopts the microcapsule of shell polyvinyl chloride resin to encapsulate isobutane as foaming agent, mix A, B component at room temperature The cross-linking and foaming reaction can be carried out. This invention can effectively solve the problem of poor impact resistance and protection performance of the existing foamed silica gel, but the sample processing performance is poor, and it is difficult to realize continuous production.

Although the method of high-temperature vulcanization and foaming can realize continuous production, it is difficult to match the speed of crosslinking and foaming, and the degree of crosslinking between the surface layer and the interior is inconsistent, which can easily lead to uneven cell size and affect the recovery of samples. Elasticity and other properties, as far as the field of shock absorption is concerned, are far from meeting the needs of the market

Chinese patent CN105331117A uses a mixed gas of air, oxygen and carbon dioxide as a foaming agent. Although the prepared silicone rubber foam cells are relatively uniform, the cells are large, the resilience performance is not good, and the molding process is single, so it can only be used Suitable for industrial injection molding

[0003] In addition, the flame retardancy of silicone rubber foam is generally achieved by adding a large amount of flame retardants. The addition of a large amount of flame retardants will further affect the uniformity of the cells, resulting in larger cells or even broken cells. Significantly reduces the shock-absorbing properties of silicone rubber foam