BIO-SAH 372N Polycarbodiimide Hydrolysis Stabilizer for PBT PA PBS Engineering Plastics Light Yellow Powder High Reactivity Additive

Overview

BIO-SAH 372N is a high-efficiency polycarbodiimide hydrolysis stabilizer specifically designed for engineering plastics, including polybutylene terephthalate (PBT), polyamide (PA), and biodegradable polyester (PBS). These materials are prone to hydrolysis due to ester or amide linkages, especially in environments involving high humidity, elevated temperatures, or long-term exposure to water. BIO-SAH 372N provides a robust solution by chemically neutralizing degradation-active species and extending the service life of the polymer.

Key Specifications

• Appearance: Light yellow powder

• Softening Point: 55–65°C

• Carbodiimide Content: ≥12%

• Chemical Type: Polycarbodiimide

Key Features

• Efficient hydrolysis stabilization for engineering plastics

• High carbodiimide functionality for strong reactivity

• Improves mechanical retention after aging

• Enhances resistance to heat and moisture

• Suitable for long-term outdoor and humid applications

• Good compatibility with PBT, PA, PBS systems

• Powder form enables easy handling and uniform blending

Applications

BIO-SAH 372N is widely used in moisture-sensitive engineering plastic applications:

• PBT components (automotive connectors, housings)

• PA (Nylon) parts for electrical and mechanical applications

• PBS biodegradable materials

• Cable insulation and sheathing

• Industrial parts exposed to humidity and heat

Mechanism of Action

BIO-SAH 372N contains active carbodiimide groups that react with carboxylic acid end groups formed during polymer degradation. This reaction produces stable N-acylurea linkages, effectively eliminating the catalytic sites responsible for hydrolysis. By interrupting the autocatalytic degradation cycle, the additive preserves polymer molecular weight and mechanical performance over time.

Processing & Dosage

• Recommended dosage: 0.5% – 2.5% depending on application requirements

• Can be incorporated during extrusion, compounding, or injection molding

• Pre-drying of polymer is recommended for optimal performance

Storage & Handling

Store in a dry, cool environment and avoid exposure to moisture. Keep packaging tightly sealed. Standard industrial safety procedures should be followed during handling.