Bio-SAH 362 Powder Monomeric Carbodiimide Hydrolysis Stabilizer for Polyester and Polyurethane End Group Capping Repair and Durability Enhancement

Overview

Bio-SAH 362 Powder is a high-performance monomeric carbodiimide hydrolysis stabilizer developed for polyester and polyurethane materials. It is specifically engineered to address one of the most critical degradation mechanisms in condensation polymers: hydrolysis-induced chain scission caused by reactive carboxylic end groups.

In polyester and polyurethane systems, exposure to moisture, heat, and harsh environmental conditions leads to the formation of carboxylic acid end groups. These groups act as catalysts for further hydrolysis, accelerating polymer degradation and resulting in reduced molecular weight, loss of mechanical properties, and shortened service life.

Bio-SAH 362 Powder provides an advanced solution by not only preventing hydrolysis but also repairing already degraded materials through reactive end-group capping.

Key Features

• Monomeric carbodiimide with high reactivity and purity

• Effectively caps active carboxyl end groups

• Repairs hydrolysis-damaged polyester and polyurethane materials

• Significantly extends service life under harsh conditions

• Improves mechanical strength and long-term durability

• Suitable for high temperature and high humidity environments

• Powder form for flexible formulation and easy incorporation

Applications

Bio-SAH 362 Powder is widely used in:

• Polyester polyol-based polyurethane systems

• PU elastomers, coatings, adhesives, and sealants

• Polyester resins such as PET and PBT

• Engineering plastics exposed to harsh environments

• Applications requiring long-term durability and reliability

Mechanism of Action

Bio-SAH 362 contains highly reactive carbodiimide functional groups that selectively react with carboxylic acid end groups formed during hydrolysis. This reaction forms stable N-acylurea linkages, effectively “capping” the reactive sites and preventing further degradation. Additionally, by neutralizing existing degradation products, it helps restore polymer chain integrity, functioning as both a stabilizer and a repair agent.

Processing & Dosage

• Recommended dosage: typically 0.5% – 2.0% depending on system requirements

• Can be added during compounding, extrusion, or formulation stages

• Suitable for standard processing conditions of polyester and polyurethane systems

Storage & Handling

Store in a cool, dry place and avoid moisture exposure. Keep container tightly sealed after use. Follow standard industrial safety procedures.