by CMID
Certain polyester resin systems may use an initiator or catalyst system specified for that material.
Polyester resin
The resin provides the base material system that develops the product’s characteristics after appropriate processing.
Initiator or catalyst system
Supporting curing components act according to the chemistry and design of the actual system. The commercial term “catalyst” must be linked to the correct material identity and documentation.
Key takeaway:always identify the correct resin system and supporting technical documentation before a trial.
This article gives no catalyst percentages, temperatures, times or curing instructions, and does not generalise across all polyester systems.
Translated text from article illustrations
The text below corresponds to the original artwork. It does not confer additional formulation, use or safety approval. Read it with the scope limits in the article.
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Polyester resin and catalyst: what does each do? A polyester resin system works with a catalyst to start a reaction and form a hard, stable material.
Respective roles. Polyester resin: forms the main structure and carries the system's basic properties. Catalyst: starts curing so the resin hardens and reaches its final properties. Common applications: marine; automotive; FRP/fibreglass; general industry.
Remember: catalyst amount, temperature and the complete formulation affect curing speed and the final result.