Anionic Polyester Soil Release Polymer Compatibility

The patent applies parameter changes by carefully controlling the molecular weight, charge density, and composition ratios of the anionic and cationic polymers. Specifically, the anionic polymer has a molecular weight of 10,000-1,000,000 g/mol with controlled charge density, while the cationic polymer has a molecular weight of 1,000-500,000 g/mol. The formulation maintains specific concentration ranges (anionic: 0.01-10% wt, cationic: 0.01-5% wt) to optimize compatibility and performance.

The patent creates a composite polymer system by combining anionic soil release polymer and cationic polymer in a specifically formulated composition. This composite approach allows the synergistic interaction between the two polymer types, where the anionic polymer provides soil release properties and the cationic polymer provides fabric care benefits, while maintaining overall formulation stability and compatibility.

The patent resolves this contradiction by adjusting the charge density parameters and molecular weight of the anionic polymer to achieve optimal soil release performance while maintaining compatibility. The anionic polymer is designed with specific charge density ranges and molecular weights (10,000-1,000,000 g/mol) that allow effective soil adhesion reduction without causing severe incompatibility issues with the cationic polymer.

The patent applies local quality by enabling the anionic polymer to selectively deposit on fabric surfaces where soil adhesion needs to be reduced, while maintaining overall formulation compatibility. The polymer deposition is localized to the fabric surface rather than throughout the entire formulation, allowing soil release functionality to be achieved at the interface level without compromising the bulk formulation stability.