Tile Cement Mortar Additive Composition Urea Cellulose Ether

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Solution Overview

Problem

Tile cement mortars often suffer from insufficient adhesive strength and short pot life due to inadequate open time, leading to delamination and reduced work efficiency.

Innovation Solution

An additive composition comprising cellulose ether and urea, where the urea is physically mixed with cellulose ether, enhancing the viscosity and water retention properties of the mortar, thereby improving adhesive strength and pot life.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If cellulose ether is used as a thickener in tile cement mortar, then water retention and adhesiveness are improved, but open time and pot life remain insufficient

Engineering Contradiction:

Improvewater retentionVSAvoidopen time

Core Design Contradiction:

Stability of the object's compositionVSDuration of action of moving object

Solution Approach 1:

The patent combines cellulose ether with urea to create a composite additive system. This composite approach allows the cellulose ether to provide thickening and water retention while the urea component extends the open time and pot life, resolving the contradiction between stability and duration of action.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes the dosage ratio of cellulose ether to urea (specifically 100 parts cellulose ether to 5-43 parts urea) to achieve the desired balance. By adjusting these parameters, the mortar maintains both adequate water retention and extended open time for proper tile setting.

Inventive Principle:

Principle #35Parameter changes

2Duration of action of stationary object

If higher dosage of thickener is used to extend pot life, then water retention improves, but adhesive strength may be compromised

Engineering Contradiction:

Improvepot lifeVSAvoidadhesive strength

Core Design Contradiction:

Duration of action of stationary objectVSStrength

Solution Approach 1:

The composite of cellulose ether and urea works synergistically to extend pot life without compromising adhesive strength. The urea component specifically addresses the duration issue while the cellulose ether maintains the adhesive properties, allowing both requirements to be met simultaneously.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent specifies precise dosage ranges to optimize the balance between pot life extension and adhesive strength maintenance. The controlled ratio ensures that the thickening effect does not interfere with the bonding capability of the mortar.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If open time is extended using additives, then work efficiency improves, but adhesive strength may be reduced

Engineering Contradiction:

Improveopen timeVSAvoidadhesive strength

Core Design Contradiction:

Loss of timeVSStrength

Solution Approach 1:

The cellulose ether-urea composite is designed to extend open time while preserving adhesive strength. The synergistic interaction between the two components ensures that the mortar remains workable for an extended period without sacrificing its bonding capability to tiles.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent optimizes the dosage parameters to achieve the desired open time extension while maintaining adequate adhesive strength. The specific ratio ranges provided ensure that time extension does not come at the cost of bonding performance.

Inventive Principle:

Principle #35Parameter changes

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 additive composition significantly extends the open time and adhesive strength of tile cement mortars, ensuring better workability and longer usability without compromising the thickening effect.

Implementation Method 1

Cellulose ether is a representative natural thickener, and may have excellent thickening ability

Methodology Applied

Scientific EffectThickening effect:

Implementation Method 2

thickeners are used to prevent separation of materials, to extend the pot life, and to maintain moisture for the hardening of cement

Methodology Applied

Scientific EffectWater retention:

Implementation Method 3

An additive composition comprising cellulose ether and urea, where the urea is physically mixed with cellulose ether, enhancing the viscosity and water retention properties of the mortar

Methodology Applied

Scientific EffectViscosity enhancement:

Implementation Method 4

The additive composition significantly extends the open time and adhesive strength of tile cement mortars, ensuring better workability and longer usability

Methodology Applied

Scientific EffectPot life extension:

Data Source

PatentEP3674273B1Additive composition for tile cement mortar and tile cement mortar comprising same

Publication Date: 2022.07.27 LOTTE FINE CHEMICAL CO LTD

AI summary

Provided are an additive composition for a tile cement mortar and a tile cement mortar including the additive composition for a tile cement mortar. The provided additive composition for a tile cement mortar includes cellulose ether and urea, wherein the amount of the urea is from 5 parts by weight to 43 parts by weight based on 100 parts by weight of the cellulose ether.