Sponge rubber has low density, good elasticity, and resistance to flexing. It has significant sound insulation, shock absorption, and heat insulation effects during use. It is widely used in various applications such as sealing, shock absorption, sound absorption, and heat insulation. As the main raw material to reduce the cost of rubber products, reclaimed rubber can be used in the production of sponge rubber products to reduce costs. When using reclaimed rubber to produce low-cost sponge rubber, choosing a suitable antioxidant can significantly improve the aging resistance of the sponge reclaimed rubber products and prolong the service life of the product.
1. Commonly used antioxidants for sponge reclaimed rubber products
The antioxidants commonly used in the production of sponge reclaimed rubber products include antioxidant D, antioxidant 4010, 4010NA, antioxidant 2246, antioxidant MB, antioxidant AW, etc. Some products also use paraffin.
Anti-aging agent D is a general-purpose anti-aging agent, which has good protection against heat, oxygen, flexion and general aging. Anti-aging agent 4010 is a high-efficiency anti-aging agent, which can obviously inhibit flexural fatigue aging caused by ozone, wind erosion and mechanical stress; 4010NA has good dispersibility and has no effect on vulcanization. Anti-aging agent 2246 has a significant protective effect on heat, oxygen, cracking and aging. Anti-aging agent MB can reduce the discoloration of rubber during vulcanization. Anti-aging agent AW can effectively prevent rubber products from cracking caused by ozone.
2. Cooperate with anti-aging system of sponge reclaimed rubber products
In actual production, sponge rubber has a porous structure, a large surface area, and is easy to age. Generally, high-efficiency antioxidants are used. When designing a protective system for sponge rubber products, the antioxidant is required to have a good anti-aging effect without adversely affecting foaming.
(1) Dark-colored sponge reclaimed rubber products: Choose antioxidant D and antioxidant 4010. Combine antioxidant D with antioxidants 4010 and 4010NA, which can further improve the heat, oxygen, and flexural cracking resistance of sponge reclaimed rubber 2YLYY1124 products. In actual production, antioxidant D will basically not affect the vulcanization speed of latex reclaimed rubber, tire reclaimed rubber, and nitrile reclaimed rubber.
(2) Light-colored sponge reclaimed rubber products: When using reclaimed rubber to produce light-colored and colored sponge rubber products, you need to choose non-polluting anti-aging agents, such as anti-aging agent MB, anti-aging agent 2246, and anti-aging agent DOD. Anti-aging agent M is the most commonly used non-polluting anti-aging agent in the rubber product industry. It is widely used in the production of transparent, white and colored rubber products. Coloring.
(3) Special sponge reclaimed rubber products: When using reclaimed rubber to produce heat-resistant sponge rubber, it is recommended to use antioxidant D and antioxidant RD together. When the requirements for aging resistance are strict, the protection system can use antioxidant D, antioxidant 4010NA and paraffin wax together for better protection; it should be noted that although antioxidant AW can effectively prevent ozone aging, it is polluting and delays vulcanization. Shortcomings.
When using reclaimed rubber to produce sponge rubber products, it is necessary to design a reasonable protection system to further delay aging and extend the service life without affecting the normal production process of sponge reclaimed rubber and the physical properties of the finished product.
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