Polymeric Builder for Lipase Stability in Liquid Detergents
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laundry detergents face challenges in effectively removing fatty soils and maintaining storage stability, especially in liquid forms where enzymes tend to deactivate due to hygroscopic ingredients, and existing solutions with lipase often do not work well with builders in liquid detergents.
Innovation Solution
A detergent composition comprising a polymer core obtained by reacting a diamine with a polycarboxylic compound and subsequent reaction with an alkylene oxide, combined with a lipase, which enhances fat removal properties in laundry and dishwashing applications while maintaining storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If lipase is used to support fat removal in liquid laundry detergents, then fat removal properties are improved, but storage stability deteriorates due to enzyme deactivation from hygroscopic ingredients
Solution Approach 1:
A polymeric builder acts as an intermediary between the lipase and hygroscopic ingredients. The polymer comprises a core obtained by reacting a diamine with a polycarboxylic compound (having 3-10 carboxyl groups), where the diamine contains a C3-C12 cycloalkylene group. This polymer structure provides a protective environment for the lipase, reducing its direct exposure to deactivating factors while maintaining fat removal efficacy.
Solution Approach 2:
The detergent composition uses a composite approach by combining the lipase with a specifically designed polymeric builder system. The polymer itself is a composite structure formed from diamine and polycarboxylic compound components, creating a multi-functional system that simultaneously supports enzyme activity and provides storage stability in liquid detergent formulations.
2Productivity
If hygroscopic ingredients are added to liquid detergent to improve cleaning performance, then cleaning effectiveness is improved, but enzyme stability deteriorates due to moisture absorption and deactivation
Solution Approach 1:
The polymeric builder serves as a mediator between hygroscopic ingredients and enzymes. The polymer structure, formed from diamine and polycarboxylic compound, creates a buffering environment that allows the presence of hygroscopic ingredients for cleaning effectiveness while protecting enzymes from direct deactivation by absorbed moisture.
Solution Approach 2:
The invention changes the chemical parameters of the detergent system by introducing a specific polymeric builder with defined structure (diamine with C3-C12 cycloalkylene reacted with polycarboxylic compound having 3-10 carboxyl groups). This parameter change modifies the microenvironment around enzymes, altering their stability characteristics without sacrificing cleaning performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition exhibits excellent fat removal properties and improved storage stability, effectively addressing the challenges of fatty soil removal and enzyme deactivation in liquid detergents.
Implementation Method 1
reacting a diamine H2N-Z-NH2 with a polycarboxylic compound PC having a total number TN of carboxyl groups per molecule in the range of from 3 to 10
Implementation Method 2
subsequent reaction with an alkylene oxide
Data Source
AI summary
Compositions comprising (A) at least one polymer comprising (a) a core obtained by reacting a diamine H2N-Z-NH2 with a compound having a total number TN of carboxyl groups per molecule in the range of from 3 to 10, wherein Z is selected from C3-C12-cycloalkylene that may be non-substituted or substituted with one or more O-C1-C4-alkyl groups and wherein C3-C12-cycloalkylene may bear one to three methyl groups, and wherein carboxyl groups are selected from COOH and COOX1 with X1 being selected from C1-C4-alkyl, or two carboxyl groups together form an anhydride group, (b) polyalkylene oxide chains, (B) at least one hydrolase.