Polyvinyl Acetal Detergent Polymer for Biodegradable Whiteness

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Solution Overview

Problem

There is a need for environmentally friendly polymers in laundry detergent compositions that provide good cleaning performance, particularly in terms of whiteness, while also being biodegradable.

Innovation Solution

Incorporation of polyvinyl alcohol acetal polymers with specific structural units into laundry detergent compositions, which offer a balance between cleaning efficacy and biodegradability, achieved through controlled acetate, hydroxyl, and acetal substitution, and molecular weight.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional polymers are used to improve cleaning performance, then whiteness performance is improved, but environmental friendliness and biodegradability deteriorate

Engineering Contradiction:

Improvecleaning performanceVSAvoidenvironmental friendliness

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent modifies the chemical structure of polyvinyl alcohol by controlling the degree of hydrolysis (70-99%) and introducing specific acetal groups with particular R substituents. These parameter changes enable the polymer to maintain cleaning effectiveness while improving biodegradability and environmental compatibility, directly resolving the contradiction between performance and environmental friendliness

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite polymer structure combining polyvinyl alcohol backbone with various acetal side groups (alkyl, aryl, hydroxyalkyl, etc.). This composite structure provides both the cleaning performance needed for effective laundry detergent and the biodegradability required for environmental friendliness, simultaneously addressing both requirements

Inventive Principle:

Principle #40Composite materials

2Reliability

If polyvinyl alcohol acetal polymer is added to enhance cleaning performance, then whiteness performance is improved, but the complexity of formulation increases

Engineering Contradiction:

Improvewhiteness performanceVSAvoidformulation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent establishes specific parameter ranges for the polyvinyl alcohol acetal polymer (degree of hydrolysis 70-99%, specific acetal substitution patterns) that optimize cleaning performance while simplifying formulation. By defining these precise parameters, the invention makes it easier for formulators to select appropriate polymers without excessive complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The polyvinyl alcohol acetal polymer serves multiple functions simultaneously: it provides whiteness enhancement, acts as a builder, and contributes to overall cleaning performance. This multi-functionality reduces the number of separate ingredients needed in the formulation, thereby simplifying the overall detergent composition despite the sophisticated polymer structure

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12534687B2Laundry detergent composition comprising polyvinyl alcohol acetal polymer

Publication Date: 2026.01.27 PROCTER & GAMBLE CO

AI summary

A laundry detergent composition can include a detersive surfactant and a polyvinyl acetal polymer having a structure including the structural units (I), (II) and (III):