In polyurethane systems, the chemical reaction takes place in seconds — but the impact of that reaction can define the entire performance of the final product.
Within this context, catalysts play a much more strategic role than simply “speeding up the reaction.” They are responsible for controlling the system’s reaction behavior, influencing processing, cell structure, stability, and foam performance.
In practice, understanding the balance between catalysts means understanding the behavior of PU itself.
And this is exactly where Amino operates with deep technical expertise.
What Do Catalysts Really Do in PU?
Polymerization Reaction
Reaction between:
Polyol;
Isocyanate.
Result:
Formation of urethane and construction of the polymeric structure.
Polymerization catalysts are essential for:
Structural development;
Mechanical strength;
Foam stability;
Development of the polymeric network.
Blowing Reaction
Reaction between:
Water;
Isocyanate.
Result:
Formation of urea and generation of CO₂.
Blowing catalysts influence:
Cell opening;
System fluidity;
Foam expansion;
Balance between blowing and gelling.
Reaction Balance Is What Defines the Foam
The performance of a PU system does not depend only on the presence of catalysts — but on the balance between them.
When there is excessive polymerization:
- The system may develop structure too quickly;
- Fluidity may be reduced;
- Filling complex molds may be compromised.
When there is excessive blowing:
- The foam may lose structural stability;
- Cell irregularities may occur;
- Mechanical properties may be compromised.
That is why fine-tuning the formulation is decisive.
The Catalyst Alone Does Not Define Foam Strength
There is a relatively common technical misconception in the market: directly associating final strength with the catalyst.
In reality, structural strength is mainly linked to:
- The composition of the polyols;
- The polymeric architecture;
- The system’s crosslinking level.
The catalyst acts by accelerating and directing the reactions — but it does not replace formulation engineering. atua acelerando e direcionando as reações — mas não substitui a engenharia da formulação.
How Catalysts Impact the Industrial Process
Beyond chemistry, catalysts directly influence the industrial behavior of the system.
Among the most important impacts are:
- Cream time;
- Gel time;
- Cure time;
- Demolding;
- Process stability;
- Industrial repeatability;
- Fluidity.
This means the catalyst directly interferes with:
- Productivity;
- Scrap rate;
- Final quality;
- The line’s operational performance.
Amino’s Approach: Formulation + Additives + Process
Our work involves:
- Development of PU systems;
- Fine-tuning of formulations;
- Selection of specific catalysts;
- Integration with silicones and performance additives.
In addition to the systems developed, Amino also has an additives division with catalyst solutions for different industrial applications. This enables us to deliver:
- Reaction stability;
- Process predictability;
- Improved industrial performance;
- Formulations adjusted to real application needs.
Amino Solutions: Catalysts Developed for Different Reaction Behaviors
At Amino, catalysts are developed considering not only reaction speed, but mainly the complete behavior of the system during processing, expansion, and structural formation of the foam.
Our portfolio includes specific solutions for different industrial needs.
AMICAT CMR 3280
Tin octoate-based catalyst.
Widely used in systems that require:
- Strong catalytic action;
- Acceleration of polymerization;
- Structural development of the foam.
AMICAT CMR 3300
Polymerization catalyst developed to promote the reaction between:
- Polyol;
- Isocyanate.
It is considered a strong gelling catalyst, recommended for:
- Slabstock foams;
- Molded foams;
- Different PU applications.
Its focus is on strengthening the structural development of the polymeric reaction.
AMICAT BC 3070
Blocked blowing catalyst.
Developed for formulations that require:
- Extended cream time;
- Improved fluidity;
- Fast demolding.
Widely used in systems where processing control is critical.
AMICAT CMR 3077
Blowing catalyst recommended for:
- Skin improvement;
- Surface finish;
- Injected parts.
It supports expansion behavior without compromising the finish of the final part.
AMICAT BC 3305
Catalyst balanced between:
- Blowing;
- Polymerization.
Blocked system developed for:
- Extended cream time;
- Thermal control;
- Anti-scorching effect.
Recommended for formulations that require greater reaction stability during processing.
More Than Speeding Up Reactions: Applied Reaction Engineering
Amino’s work with catalysts goes beyond the selection of raw materials.
Our focus is on developing solutions that deliver:
- Reaction balance;
- Process stability;
- Industrial repeatability;
- Improved finish;
- Structural control of the foam.
Because in PU, final performance begins with reaction behavior.da reação.
Far Beyond Speeding Up Reactions
When correctly selected, the catalyst helps build:
- Stability;
- Productivity;
- Cell structure;
- Repeatability;
- Final quality.
In other words, it directly influences the system’s technical and economic behavior.sistema.
Catalysts are a central part of PU systems engineering.
More than accelerating reactions, they help control the chemical balance that defines the foam’s structure, processing, and final performance.
At Amino, we combine expertise in PU systems with our additives division to deliver more stable, predictable formulations aligned with the real needs of the industry.
Talk to Amino’s technical team and discover how to optimize the reaction behavior of your PU system with the right combination of catalysts and additives.