Silica-Aluminosilicate Composite for Rubber Reinforcement

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing rubber reinforcing materials, such as silica and aluminosilicate particles, face issues with dispersibility and reinforcing effectiveness due to strong particle attraction, leading to non-uniform distribution and compromised mechanical strength and abrasion resistance in eco-friendly tire compositions.

Innovation Solution

An inorganic composite formed by agglomerating silica primary particles and amorphous aluminosilicate primary particles with specific chemical and physical properties, creating micron-sized secondary particles that enhance dispersibility and reinforcing effects in rubber compositions, achieved through a spray-drying method without additional dispersants.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If silica or aluminosilicate particles are used as rubber reinforcing materials, then rolling resistance is reduced, but dispersibility deteriorates due to strong particle attraction and aggregate formation

Engineering Contradiction:

Improverolling resistanceVSAvoiddispersibility

Core Design Contradiction:

Use of energy by moving objectVSStability of the object's composition

Solution Approach 1:

The patent applies composite materials by combining silica particles and aluminosilicate particles in a specific ratio (70:30 to 90:10) to create a composite reinforcing material. This composite structure leverages the low rolling resistance property of silica while using aluminosilicate to reduce particle attraction and improve dispersibility, thus resolving the technical contradiction between energy efficiency and compositional stability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the particle size parameter by controlling the average particle diameter to be 0.5 μm or less, and optimizes the composition ratio parameter of silica to aluminosilicate. By adjusting these parameters, the patent achieves both low rolling resistance and improved dispersibility, resolving the contradiction between energy efficiency and compositional uniformity.

Inventive Principle:

Principle #35Parameter changes

2Strength

If highly dispersed precipitated silica is used with silane coupling agent, then abrasion resistance is improved, but dispersibility remains low due to particle aggregation

Engineering Contradiction:

Improveabrasion resistanceVSAvoiddispersibility

Core Design Contradiction:

StrengthVSStability of the object's composition

Solution Approach 1:

The patent creates a composite of silica and aluminosilicate particles where the aluminosilicate component interferes with the strong attraction between silica particles, preventing aggregate formation. This composite structure maintains good abrasion resistance while significantly improving dispersibility compared to using pure silica with silane coupling agents.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The aluminosilicate particles act as an intermediary substance that mediates the interaction between silica particles and rubber matrix. They prevent direct strong attraction between silica particles, thereby improving dispersibility while maintaining the reinforcing effect for abrasion resistance.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If alumina or clay is used as rubber reinforcing white additive, then rolling resistance is lowered, but dispersibility decreases due to strong aggregate formation

Engineering Contradiction:

Improverolling resistanceVSAvoiddispersibility

Core Design Contradiction:

Use of energy by moving objectVSStability of the object's composition

Solution Approach 1:

The patent uses a composite of silica and aluminosilicate where the synergistic effect between the two components achieves low rolling resistance while preventing the aggregate formation problem that occurs with alumina or clay alone. The specific composition ratio and particle size control ensure both energy efficiency and compositional stability.

Inventive Principle:

Principle #40Composite materials

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 composite improves the uniform distribution and reinforcing effectiveness of inorganic particles in rubber compositions, enhancing viscoelastic characteristics and wear resistance while being easier to handle and process, suitable for eco-friendly tires.

Implementation Method 1

secondary particles formed by agglomeration of silica primary particles and amorphous aluminosilicate primary particles

Methodology Applied

Scientific EffectAgglomeration: Coagulation

Data Source

PatentEP3572457B1Inorganic composite for rubber reinforcement, method for preparing the same, and rubber composition for tires comprising the same

Publication Date: 2022.10.26 LG CHEM LTD

Figure 1

AI summary

The present disclosure relates to an inorganic composite for rubber reinforcement, a method for producing the same, and a rubber composition for tires including the same. The inorganic composite for rubber reinforcement according to the present disclosure is easy to handle, thereby improving safety of operators and productivity. Moreover, the inorganic composite makes it possible to uniformly disperse the inorganic particles in a rubber composition and to enhance the reinforcing effect. The rubber composition including the inorganic composite for rubber reinforcement can be suitably used for eco-friendly tires requiring high efficiency and high fuel efficiency characteristics.