Coated Particulate Detergent with Sulphonated Fluorescer
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Solution Overview
Problem
Existing particulate detergent compositions face challenges in achieving a high environmental profile while maintaining effective detergency, as they often require components that do not contribute significantly to cleaning but are necessary for processing and stability, and incorporating sulphonated fluorescers into extruded surfactant core particles can lead to issues with deformation and residue formation.
Innovation Solution
A coated particulate detergent composition with a surfactant core and a coating comprising water-soluble inorganic salt and sulphonated fluorescer, where the particles are designed to be large, oblate spheroids with a specific size and shape, and the coating includes sodium carbonate and optionally other additives, which improves detergency and prevents deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sulphonated fluorescer is added to the core of extruded surfactant particles, then fabric whitening effect is improved, but particle deformation and residue formation occur
Solution Approach 1:
The patent divides the detergent particle into two distinct segments: a surfactant core and a coating layer. The fluorescer is placed exclusively in the coating layer rather than the core, separating the functions of detergency (core) and optical brightening (coating). This segmentation prevents the fluorescer from causing core deformation while maintaining its whitening effect on fabric.
Solution Approach 2:
The coating layer acts as an intermediary between the surfactant core and the external environment. By placing the fluorescer in this intermediate layer, the patent mediates the interaction between the fluorescer and the core, preventing direct contact that would cause deformation while still allowing the fluorescer to perform its function on the fabric surface.
2Stability of the object's composition
If large particle size (5 mm diameter) is used to eliminate deformation and caking, then handling and storage stability are improved, but dissolution speed may be reduced
Solution Approach 1:
The patent changes the physical and chemical parameters of the particle surface by applying a coating layer to the large extruded particles. This coating modification enables large particles (5 mm diameter) to dissolve rapidly despite their size, as the coating facilitates water penetration and surfactant release without requiring particle fragmentation.
3Strength
If conventional solid structuring material is used to harden surfactant core, then particle hardness is improved, but environmental profile and cleaning effectiveness are reduced
Solution Approach 1:
The patent extracts and eliminates conventional solid structuring materials (such as fillers and builders) from the particle formulation. Instead, it relies on the intrinsic properties of surfactant blends to provide the necessary particle hardness and structural integrity, thereby improving both environmental profile and cleaning effectiveness.
Solution Approach 2:
The patent uses homogeneous surfactant blends to provide both the structural framework and cleaning functionality of the particle. By making the surfactant composition uniform throughout the core without adding heterogeneous structuring materials, the particle achieves adequate hardness while maintaining high cleaning effectiveness and environmental compatibility.
4Ease of operation
If inorganic coating is applied to prevent sticking of hygroscopic particles, then flowability is improved, but coating complexity and processing steps are increased
Solution Approach 1:
The patent merges multiple functions into the single coating layer: it provides anti-sticking properties to prevent particle aggregation, enhances flowability, and incorporates the fluorescer for optical brightening. This consolidation reduces the need for multiple separate coating steps and simplifies the overall processing complexity.
Solution Approach 2:
The coating layer is designed as a multi-functional component that simultaneously addresses flowability, prevents sticking, and provides optical brightening. This universal approach eliminates the need for separate functional layers, simplifying the coating process while achieving multiple objectives.
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 achieves excellent detergency, fast dissolution, and low residue formation, while the coating reduces UV light transmission to protect sensitive core components, and the specific particle shape and size ensure free-flowing properties and improved appearance.
Implementation Method 1
the coating reduces UV light transmission to protect sensitive core components
Implementation Method 2
coated particulate detergent composition comprising sulphonated fluorescer
Data Source
AI summary
A particulate detergent composition comprising sulphonated fluorescer, wherein the composition comprises greater than 40 wt % detergent surfactant, at least 70% by number of the particles comprising a core, comprising mainly surfactant, and around the core a coating, comprising water soluble inorganic salt and sulphonated fluorescer, each particle having perpendicular dimensions x, y and z, wherein x is from 0.2 to 2 mm, y is from 2.5 to 8 mm, and z is from 2.5 to 8 mm.