Toluene diisocyanate manufacturer News Stannous octoate polyurethane foaming process

Stannous octoate polyurethane foaming process

Stannous octoate polyurethane foaming process

As an efficient and environmentally friendly catalyst, Stannous Octoate plays an important role in the polyurethane (Polyurethane, PU) foaming process. important role. Polyurethane foam is widely used in various industries including construction, automotive, packaging and furniture due to its excellent thermal insulation, sound insulation and mechanical strength. Stannous octoate catalyst can significantly accelerate the reaction between isocyanate and polyol, thereby promoting the formation of polyurethane foam and improving production efficiency and product quality.

The role of stannous octoate in polyurethane foaming process

Stannous octoate catalysts are organic metal compounds that contain divalent tin ions in their molecular structure and can effectively catalyze the reaction between isocyanate and compounds containing active hydrogen atoms (such as polyols, water, etc.). In the polyurethane foaming process, stannous octoate mainly works in the following ways:

  1. Accelerate NCO-OH reaction: Stannous octoate can significantly accelerate the reaction speed between isocyanate group (NCO) and hydroxyl group (OH) in polyol, and promote the formation of polyurethane prepolymer .
  2. Promote the decomposition of foaming agent: During the foaming process, stannous octoate can also catalyze the reaction between the foaming agent (usually water) and isocyanate, releasing carbon dioxide gas to form a stable Foam structure.
  3. Adjust foam density and pore structure: By precisely controlling the amount of catalyst added, the density, pore size and distribution of polyurethane foam can be adjusted to meet the needs of different application fields.

Process flow and precautions

In the polyurethane foaming process, the use of stannous octoate must follow certain operating specifications:

  • Accurate measurement: According to the formula requirements, accurately measure the amount of stannous octoate added. Too much or too little will affect the quality of the foam.
  • Even mixing: Evenly disperse stannous octoate into polyol or other components to ensure uniform distribution of the catalyst throughout the reaction system.
  • Temperature control: Temperature has a significant impact on the catalytic activity of stannous octoate, so it is necessary to control the temperature of the reaction system according to the specific formula and equipment conditions.
  • Safety Measures: Due to the certain toxicity of stannous octoate, appropriate personal protective equipment should be worn during operation to avoid direct contact with skin and inhalation of dust.


As a key catalyst in the polyurethane foaming process, stannous octoate plays an irreplaceable role in increasing production efficiency and improving foam performance. Through fine process control and reasonable formula design, the catalytic performance of stannous octoate can be exerted, providing solid technical support for the wide application of polyurethane foam materials. However, considering the safety and environmental protection of stannous octoate, future research directions may explore more alternatives or improved catalysts in order to further reduce the impact on the environment while maintaining efficient catalytic performance.

Extended reading:

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