t5. polymeric anti redeposition (clariant)

Public

FUN & LSC

BS Industrial & Home Care

GDC Laundry

An Effective Screening Tool for Evaluation of Polymeric Anti-Redeposition Agents and its Correlation with Consumers Visual Perception G.Nunes*(1), M.Gallotti(1), A.Coimbra(1), A.Lerch(2), R.Morschhaeuser(2) (1)Clariant S.A. (Brazil), (2)Clariant Produkte (Deutschland) GmbH

Global Development Center - Laundry

FUN & LSC Division

An Effective Screening Tool

for Evaluation of Polymeric Anti-Redeposition Agents

and its Correlation with Consumers Visual

Perception


Slide 2

Clariant - GDC Laundry

Introduction

Soil Redeposition

–! Undesirable phenomena

–! Responsible for the loss of whiteness

Surfactants

–! Anti-redeposition effect

–! Not enough for laundry

Anti-Redeposition Aids

–! Many products in the market

–! Not easy to generate data to prove their efficiency

A new method for anti-redeposition

–! Effective, easy and reliable method

–! Impact in the final visual perception (stressed and multi-cycle conditions)

Laundry Detergents

–! Soil Removal

–! Redeposition Inhibition

-!Introduction

-! Historical Background

-! Involved Variables

-! Types of Soil

-! Theory Behind Soil Redeposition

-! Anti-Redeposition Additives

-! Anti-Redeposition Screening Test

-! Anti-Redeposition

Methodology

-! Comparative Results

-! A More Realistic Screening

Tool

-! Whiteness Maintenance

-! Summary & Future Works

FUN & LSC Division




Perception


Slide 3


Historical Background

2200 BC First literary reference to

Soap1

Development of the 1st synthetic detergent

(Germany)

1916 World War I

1914

1918

Multi-component product for laundry based on synthetic

surfactant (Europe) 2

1932

Patent protecting CMC as anti-redeposition

agent (France)3

1936

Multi-component product for laundry based on synthetic

surfactant (USA)2

1946

1939

1945 World War II

First multi-component product for laundry, based on soap2

1907

1.!“Soap Technology for the 1990’s”, Edited by L. Spits – American Oil Chemist’s Society, 1990

2.!“Surface Active Agents and Detergents”, Vol. II, A.M.Shwartz, J.W.Perry and J.Berch – Interscience Publishers, Inc., 1958 3.! Detergency – Theory and Test Methods Part I”, Surfactant Science Series Vol. 5, Edited by Cutler, W.G. and Davis, R.C. – Marcel Dekker Inc., 1972

After WW-II:

starts the major concerns about

soil redeposition

-!Introduction



-! Types of Soil

-! Theory Behind Soil

Redeposition


-! Anti-Redeposition Screening

Test

-! Anti-Redeposition Methodology


-! A More Realistic Screening Tool



FUN & LSC Division




Perception


Slide 4


Soil Redeposition: Main Variables Involved

Substrate

Soil

Topography Geometry

and nature

of the fiber

Chemical

Composition

Hydrophilicity Eletric charge Hardness

Viscosity Chemical

Composition

Concentration Particle

Size

Shape Surface

Charge

Surface

Tension

Washing Conditions

Time Water

Volume

Temperature Rinsing

Cond.

Mechanical

Work

Detergent

Electrolyte Surfactant

Concentration

Redepositon

Inhibitor

-! “Detergency – Theory and Test Methods Part I”, Surfactant Science Series Vol. 5, Edited by Cutler, W.G. and Davis, R.C. – Marcel Dekker Inc., 1972

-!Introduction



-! Types of Soil





Methodology



Tool



FUN & LSC Division




Perception


Slide 5


Main Types of Soil

Oily Soil

Particulate Soil

-! Retains its original shape on deposition -! Ex.: clay, sand and carbon from the enviroment

-! Alters its original shape on deposition and on different systems

-! Ex.: Fats and oils from foods and body

Particulate +

Oily Soil

Colloids and Surfaces A: Physicochemical and Engineering Aspects 74 (1993) 131-167

-!Introduction



-! Types of Soil


Redeposition



Test






FUN & LSC Division




Perception


Slide 6


Average Laundry Conditions

The Theory Behind Soil Redeposition The Washing Liquor as a Colloidal System

(charged particles)

At highly positive or highly negative potentials the particles tend to repel

each other forming a stable system.

Hunter, R.J.;Lee. R. – “Foundations of Colloid Science” Vol. I Oxford Science Publications, Oxford University Press

-!Introduction



-! Types of Soil


Redeposition




Methodology



Tool



High Surface Charge:

-! High pH values during washing generating highly negatively charged surfaces.

-! Components that increase the charge of the fabric and/or the particle surfaces.

Steric Effect

(uncharged particles)

Particle coating with a material t h a t p r e v e n t s t h e i r c l o s e

approach.

- - - - - - - - - -

- +

- - - - - - - - - -

- +

Different Ionic Strengths:

-! Presence of builders, electrolytes and dissolved ions (water hardness). Material adsorption on the surfaces:

-! Presence of macromolecules and surfactants that can adsorb on the fabric and/or the particle surfaces.

Electrostatic Effect

FUN & LSC Division




Perception


Slide 7


Current Anti-Redeposition Additives

Carboxymethylcellulose

!! Adsorbed on both fabric and particle !! Mainly effective for cotton

!! Colloidal stabilizer

Polycarboxylates

!! Adsorption mainly on the fabric !! More effective for polyester fibers

!! Polyelectrolyte: eletrosteric effect

-! “Aplicação de CMC em Detergente em Pó” – Denver Cotia Ind. E Com. LTDA -!“Handbook of Detergents – Part A: Properties” , Surfactant Science Series Vol. 82, Edited by Broze, G. - Marcel Dekker Inc., 1999

-! “Detergency – Theory and Test Methods Part I”, Surfactant Science Series Vol. 5, Edited by Cutler, W.G. and Davis, R.C. – Marcel Dekker Inc., 1972 -! JAOCS 40(11), 699-674 (1963)

-!Introduction



-! Types of Soil





Methodology



Tool



Nonionic Polymers

Polyvynylpyrrolidone (PVP) Polyvinyl Alcohol

(US Patent 3144412)

!! Adsorbed mainly on soil particles !! Steric effects

FUN & LSC Division




Perception


Slide 8


An Effective Anti-Redeposition Screening Test

!! FLEXIBLE: different needs for

each market

–! Soil

–! Substrate

–! Washing Habits

–! Formulation

!! LOW COST:

–! Equipment

–! Raw Materials

!! TIME SAVER:

–! Availability to test several

formulations, soils or

substrates at the same time.

!! REPRODUCTIBLE

!! RELIABLE

!! SIMPLE

-!Introduction



-! Types of Soil




Test


Methodology



Tool



FUN & LSC Division




Perception


Slide 9


The Equipment

Ori

gin

al J

ar T

est

Mo

dif

ied

Jar

Tes

t

Agitation

X

Heating

-!Introduction



-! Types of Soil




Test


Methodology



Tool



FUN & LSC Division




Perception


Slide 10


The Anti-Redeposition Methodology

Weighting 10g of water

Addition of the soil on water

Dispersion of the soil for 5 minutes

Addition of the detergent solution

solution to the soil solution

Addition of the swatches, one at a time

and washing for 30 minutes

Rinse one swatch at a

time under a slow water flow

Detergent Solution (3 minutes of stirring)

-!Introduction



-! Types of Soil





Methodology



-!Tool



FUN & LSC Division




Perception


Slide 11


Comparative Anti-Redeposition Results Substrate: Knit 50% CO - 50% PES

Raw Palm Oil

0.5 g/L

Olive Oil / Dye

4.0 g/L ORGANIC

Carbon Black

0.5 g/L INORGANIC

Red Clay

3.0 g/L

Carbon Black

Olive Oil

0.8 g/L

Oily Soils

Particulate Soils

Particulate

+ Oily Soil

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

-!Introduction



-! Types of Soil







Tool



FUN & LSC Division




Perception


Slide 12


Comparative Anti-Redeposition Results Substrate: Knit 100% PES

Oily Soils

Particulate Soils

Particulate

+ Oily Soil Raw Palm Oil

0.3 g/L

Olive Oil / Dye

2.0 g/L

ORGANIC

Carbon Black

0.5 g/L INORGANIC

Red Clay

3.0 g/L

Carbon Black

+ Olive Oil

0.5 g/L

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

HDP HDP +

Clariant Polymer

-!Introduction



-! Types of Soil







Tool



FUN & LSC Division




Perception


Slide 13


Anti-Redeposition Aids – Results Substrate: Knit 50% CO - 50% PES

Carbon Black – Olive Oil

-!Introduction



-! Types of Soil







Tool



Clariant Polymer

HDP HDP +

Clariant Polymer

Acrylic / Maleic Acids Copolymer

(Avg MW = 70,000)

Commercial

Polycarboxylates

Acrylic Polymer

(Avg MW = 4,500)

HDP HDP +

Polycarboxylate HDP HDP +

Polycarboxylate

Commercial

CMC

Sodium CMC

(degree of substitution = 0.46)

HDP HDP + CMC

FUN & LSC Division




Perception


Slide 14


12 evaluators

2 or more tiles with the

replicates of each formulation

Instructions to organize from

the cleanest to the dirtiest

Statistical treatment of the data

Attribution of grades or

selection of the best one

!! Statistical Approach to the Visual Panel: Non-Parametric Analysis

-! Paired Comparison: Preference Test

-! Multiple Comparison: Friedman-Modified Dan

An Even More Realistic Screening Tool -!Introduction



-! Types of Soil







Tool



Lower Soil

Concentration

Multi-Cycle

Test

Visual

Analysis

(Panel)

FUN & LSC Division




Perception


Slide 15


Whiteness Maintenance Substrate: Knit 50% Cotton – 50% Polyester

Soil: Carbon Black – Olive Oil

Soil Concentration: 100 µL/L

UV Included

UV Excluded

Visual Evaluation After 3rd Cycle Visual Evaluation After 5th Cycle

-!Introduction



-! Types of Soil








-! Summary & Future Works A B AB A C B Statistical Approach

(UV included and excluded)

FUN & LSC Division




Perception


Slide 16


Summary & Future Works

!! As next steps Clariant intend to support customers interested in

implementing this methodology.

!! As a very active company in the field of laundry applications and polymeric

synthesis, Clariant is currently:

–! Consolidating a visual panel evaluation

–! Concluding works with the screening multi-cycle approach

–! Developing new polymeric anti-redeposition additives far more effective them

those currently available in the market

Thank you for your attention

-!Introduction



-! Types of Soil









!! A new effective and reliable methodology for evaluation of laundry detergents

and components has been set up with an extremely simple, however, systematic

and meticulous approach.

GDC Laundry (São Paulo-BR) – Mr. George Nunes – [email protected]

t5. polymeric anti redeposition (clariant)

Documents