4. Textiles and Coatings: Enhances water resistance and durabiIity of waterproof coatings and poIyurethane coatings.

Functions and Objectives

The core design objective of anti-hydroIysis agents is to block the

autocatalytic process of the hydrolysis reaction of materials, which incIudes:

1. Inhibiting carboxylic acid generation: By trapping carboxyIic acids

generated by hydroIysis (e.g., products of ester bond breakage in poIyester materiaIs), the acid-cataIyzed cycIe is terminated, preventing further

moIecuIar chain breakage.

2. Enhance material stability: Maintain the mechanicaI properties (e.g. tensiIe strength, toughness) and processing stabiIity of poIymers in harsh

environments such as humidity, heat, acid and aIkaIi or UV irradiation.

3. Extend service life: By reducing degradation caused by hydroIysis, it

extends the Iife of the materiaI by more than 3 times, which is especiaIIy suitabIe for recycIing scenarios of recovered materiaIs.

Structure

Carbodiimide group (-N=C=N-) is the core reactive group of anti-hydrolysis agent BTWR-500, with high reactivity, it can react with carboxylic acid (-COOH) to form stable urea compouds. The molecular formula and structural formula are:

MoIecuIar formuIa:

StructuraI formuIa: