silicones for leather application - latro · silicones for leather application. 2 ... coating...

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Silicones for Leather Application

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Copyright 2010 Momentive Performance Materials Inc. All rights reserved. CONFIDENTIAL

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Flesh Soaking/Rinsing Liming/Reliming/Deliming

Finishing

Bating

Pickling/Depickling

Top CoatingFatliquoring

Dyeing

Tanning/Retanning

Wet Process

dry under

tension

Staking

Top Coating & Finishing

Example of

leather wet process

Example of leather

coating & finishing process

Silwet* L-77 spreader

Silwet L-77

spreader

- Magnasoft* 238 hand modifier

- Magnasoft 88 hand modifier

- Magnasoft L-39 hand modifier

- Silwet L-77 spreader

- Magnasoft 238 hand modifier

- Magnasoft L-39 hand modifier

- SF1705 & SF1706

- OF TP-3233

Overview of Typical Leather Processes

Potential Applications for

Momentive’s Products

*Magnasoft and Silwet are trademarks of Momentive Performance Materials Inc.

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Products Used for Leather

Wet Process

• Soaking

• Dyeing

• Washing stage after fatliquring

• Washing stage after fatliquring

• Co-apply with fatliquor

• Rinsing stage in fatliquoring process

• Incorporate in fatliquor formulation

Where to apply

• 0.1~0.3% as received on weight of wet blue

• 3~5% as received on weight of wet blue



• 3~5 wt% as received in fatliquor formulation

Typical use level

Silwet* L-77

spreader

Magnasoft L-39

hand modifier

Magnasoft 88

hand modifier

Magnasoft* 238

hand modifier

Dyeing-aids, Wetting/Spreading for all leathers

Leather hand-feel modifier, particularly for pig & lamb skin

Leather hand-feel modifier, particularly for pig & lamb skin

Leather hand-feel modifier, paticularly for cowhide

Potential

Application

N/ASurface smoothSlippery & SilkyLimp, Soft & SilkyHand-feels

Non-ioinicSlightly cationicNon-ionicNon-ionicIonic character

• Improve soaking efficiency

• Help penetrate dyes while dyeing

• Even dyeing

• Less dust deposition

• Darker color shade of leather

• Improve tear strength of leather

• Deepen color shade of leather

•Water dispersible

• Excellent shear stability; no deposit

• Compatible in fatliquoring bath

•Water dispersible

Typical Benefits


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Water Base Top Coating

• Top coating

• Incorporate in water-base coating formulation

• Top coating• Top coating

• Incorporate in water-base PU formulation

• Top coating

• Incorporate in water-base PU formulation

Where to apply

• 0.1~0.3% as received in coating

• 1~3% as received in formulation

• 3~5% as received in coating system

• 0.1~0.3% as received in coating

• 1~3% as received in PU formulation

• 1~2% as received in coating system

• 2~5% as received in PU formulation

Typical use level

OF TP-3233Magnasoft L-39

hand modifier

Silwet* L-77

spreader

Magnasoft* 238

hand modifier

Leveling & wetting aid, particularly for hydrophobic coating

Leather hand-feel modifier for all types of leather

Uniform coating in all types of coating system

Leather hand-feel modifier for all types of leather

Potential

Application

Non-ioinicSlightly cationicNon-ionicNon-ionicIonic character

• Leveling/wetting without impacting hydrophobicity of coating

• Compatible in coating formulation

• Applicable in water & solvent base coating system

• Slippery & smooth hand-feel

• Less dust deposition

• Darker color shade of leather

• Wetting and spreading of water-base coating system on hydrophobic leather surface

• Uniform coating on leather surface

• Penetrating of coating materials

• Limp, soft & silky hand-feel of leather

•Compatible with PU/Acrylic emulsion

• Excellent shear stability; no deposit

• Moderate hydrophobicity

Typical Benefits


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Solvent Base Top Coating

• 0.1~0.3% as received in solvent base coating system

• 1~3% as received in solvent-base coating formulation

• Leveling/wetting without impacting hydrophobicity of coating

• Compatible in solvent & water coating system

Non-ioinic

• Top coating

• Incorporate in solvent-base coating formulation

Leveling & wetting aid, particularly for hydrophobic coating

OF TP-3233

• 0.1~0.3% as received in solvent-base coating system

• 1~3% as received in solvent-base coating formulation

• Wetting and spreading of solvent base coating system

• Uniform coating on leather surface

• Penetrating of coating materals

Non-ionic

• Top coating


Uniform coating in all types of coating system

Silwet* L-77

spreader

• Top coating


• Top coating


Where to apply

•0.5~2% as received in solvent base coating system

• 0.5~2% as received in solvent base coating system

Typical use level

SF 1706SF 1705

Water repellent & Hand feel modifier (Film-forming)

Water repellent & Hand feel modifier

Potential Application

Non-ioinicNon-ionicIonic character

• Improve hand-feel & water repellency

• Fast curing in presence of air-moisture

• Film-forming; Resistant to abrasion

• Silky & slippery hand-feel with water repellency

• Moderate spreading on leather surface

Typical Benefits

*Silwet is a trademarks of Momentive Performance Materials Inc.

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Modifier for PU Polymers Used for Leather Coating

- For Formulators Only -

A hybrid polyurethane polymer partially composed of Carbinol terminated silicone fluids

to provide elegant and virtually permanent means of delivering silicone-like properties to

resin systems with maintaining the original characteristics of polyurethane polymer

Application

Leather coated with the silicone/PU hybrid polymer may exhibit the flexibility,

leveling, gloss, slip/release, mar resistance, water resistance, whether-ability and

thermal stability at wide temperature range

Benefits

to leather

• Linear polydimethylsiloxane fluids terminated with primary carbinol (= hydroxyl-alkyl)

group that are capable for normal alcohol reactions

• Functionalize with reactive organic groups capable of forming non hydrolyzable covalent

bonds with a variety of resin systems such as polyurethanes and polyesters

Chemistry

OS i

OS i

Rx

S iRH O O H

*A typical structure of a carbinol terminated silicone fluid

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Typical Advantages & Benefits of

PU Modified with Momentive Silicones

• Improve water repellencyHydrophobicity

• Better clarity on leather Compatibility in PU polymer system

• Less brittleness & cracks on leather at even low temperature range

Improve flexibility

• Less sticky; More comfortable feel

• Slippery feel; Less squeaking noise

Reduce dragging

• Leveling & Gloss

• Mar resistance; Better appearance

Reduce surface tension

• Longer-life of PU coatingImprove coating adhesion

Benefits on Coated LeatherAdvantages of PU coating

Virtually Multiple Advantages and Benefits for Leather !!!

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Products to Modify PU Polymer

Used for Leather Coating

ExcellentModerateExcellentModerateCompatibility in PU

polymer system

ModerateGoodModerateGoodLow Surface Tension

ModerateGoodModerateGoodFlexibility

GoodGoodModerateGoodLow Dragging

Similar to those undertaken with any alcohol such as polyol in polyurethane chemistry. The best balance of compatibility and performance depends on PU polymer system and

condition.

How to apply

Insoluble in water Solubility

mgKOH g-1

Weight % 4.01.56.03.0

37603535Viscosity (cSt)

1325019899

OH

value

90905890Flash Point (°°°°C)

Non-ioinic

Baysilone OF OH

502 6%

Non-ionic

Baysilone OF OH

502 3%

Baysilone OF OH

702 4%

Baysilone OF OH

702E

Non-ioinicNon-ionicIonic CharacterIstic

Combination of high & low OH value products in PU polymer system may be

desirable for the best balance of the performance and compatibility.

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DISCLAIMER: THE MATERIALS, PRODUCTS AND SERVICES OF MOMENTIVE PERFORMANCE MATERIALS INC., MOMENTIVE PERFORMANCE MATERIALS USA INC.,

MOMENTIVE PERFORMANCE MATERIALS ASIA PACIFIC PTE. LTD., MOMENTIVE PERFORMANCE MATERIALS WORLDWIDE INC., MOMENTIVE PERFORMANCE MATERIALS

GmbH, THEIR SUBSIDIARIES AND AFFILIATES DOING BUSINESS IN LOCAL JURISDICTIONS (collectively “SUPPLIERS”), ARE SOLD BY THE RESPECTIVE LEGAL ENTITY OF

THE SUPPLIER SUBJECT TO SUPPLIERS’ STANDARD CONDITIONS OF SALE, WHICH ARE INCLUDED IN THE APPLICABLE DISTRIBUTOR OR OTHER SALES AGREEMENT,

PRINTED ON THE BACK OF ORDER ACKNOWLEDGMENTS AND INVOICES, AND AVAILABLE UPON REQUEST. ALTHOUGH ANY INFORMATION, RECOMMENDATIONS, OR

ADVICE CONTAINED HEREIN IS GIVEN IN GOOD FAITH, SUPPLIERS MAKE NO WARRANTY OR GUARANTEE, EXPRESS OR IMPLIED, (i) THAT THE RESULTS DESCRIBED

HEREIN WILL BE OBTAINED UNDER END-USE CONDITIONS, OR (ii) AS TO THE EFFECTIVENESS OR SAFETY OF ANY DESIGN INCORPORATING SUPPLIERS’ PRODUCTS,

MATERIALS, SERVICES, RECOMMENDATIONS OR ADVICE. AFOREMENTIONED EXCLUSIONS OR LIMITATION OF LIABILITY ARE NOT APPLICABLE TO THE EXTENT THAT THE

END-USE CONDITIONS AND/OR INCORPORATION CONDITIONS CORRESPOND TO THE RECOMMENDED CONDITIONS OF USE AND/OR OF INCORPORATION AS DESCRIBED BY

SUPPLIER IN ITS PRODUCT DATA SHEET AND/OR PRODUCT SPECIFICATIONS. EXCEPT AS PROVIDED IN SUPPLIERS’ STANDARD CONDITIONS OF SALE, SUPPLIERS AND

THEIR REPRESENTATIVES SHALL IN NO EVENT BE RESPONSIBLE FOR ANY LOSS RESULTING FROM ANY USE OF ITS MATERIALS, PRODUCTS OR SERVICES DESCRIBED

HEREIN. Each user bears full responsibility for making its own determination as to the suitability of Suppliers’ materials, services, recommendations, or advice for its own

particular use. Each user must identify and perform all tests and analyses necessary to assure that its finished parts incorporating Suppliers’ products, materials, or services will

be safe and suitable for use under end-use conditions. Nothing in this or any other document, nor any oral recommendation or advice, shall be deemed to alter, vary, supersede,

or waive any provision of Suppliers’ Standard Conditions of Sale or this Disclaimer, unless any such modification is specifically agreed to in a writing signed by Suppliers. No

statement contained herein concerning a possible or suggested use of any material, product, service or design is intended, or should be construed, to grant any license under

any patent or other intellectual property right of Suppliers or any of its subsidiaries or affiliates covering such use or design, or as a recommendation for the use of such material,

product, service or design in the infringement of any patent or other intellectual property right.

The Momentive logo is a trademark of Momentive Performance Materials Inc.


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