www.allnex.com

www.allnex.com

9 March 2017

New UV-curable soft touch oligomers

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EBECRYL®8896, EBECRYL®8894

Introduction

• Soft touch is one of the most popular aesthetic trends in the coating market

• It is extensively used in the consumer electronics, appliances, automotive interiors, packaging and furniture markets to impart a luxurious feel to substrates that have an beauteous feel.

• EBECRYL® 8896 / EBECRYL® 8894 are the newly developed resins for direct and film coating that imparts excellent soft feel features while maintaining supberb scratch & abrasion resistance performance.

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UV Soft touch

Product feel plays a decisive role in consumer’s decision purchasing process. Even though feel is critical to the sale, there is no unified haptic scale because touch is subjective and unique from person to person. Therefore, it is important that resin(s) system have tunable feels

• Haptic normally means the following different feelings:

Silk feeling/velvet feeing

Rubbery feeling

Leather feeling

Others..

• In real world, formulators look not only for haptic solutions, but also to fulfill special performance requirements. So Allnex has developed the 2nd generation haptic resin solutions by improving other performance requirements beyond having a soft touch.

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Soft Touch

- Good scratch & abrasion resistance

- Good adhesion

2nd Generation soft touch resins

New solution to UV Soft touch

The 2nd generation products improved further in:

Soft feel

Scratch & Abrasion resistance

Easy to formulate

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1st

Generation

EBECRYL®

8296

EBECRYL®

4513

EBECRYL®

8465

2nd

Generation

EBECRYL® 8896

EBECRYL®

8894

EBECRYL® 8896

Soft feel oligomer

EBECRYL® 8894

Performance

promoter

Property table for UV Soft touch oligomers

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EBECRYL ® 8896 EBECRYL ® 8894

Chemistry Aliphatic Urethane Acrylate Aliphatic Urethane Acrylate

Characteristics High elastic & rubbery feeling Excellent abrasion, hydrolysis

& QUV resistance

Functionality 3 4

% BAC 20 20

Visc (mPa.s @ 25°C) 10000 65000

Tg (tan d max) (°C) -26 60

Ultimate elongation (%) 50 37

Tensile strength (MPa) 3,3 28

Young Modulus (MPa) 10 426

* Commercial availability of these resins should be checked with the local Allnex representative

Solution matrix to UV Soft touch

EBECRYL® 8896

EBECRYL® 8465

EBECRYL® 331

EBECRYL® 8894

EBECRYL® 1360

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Good adhesion

Wetting and flow additive.

Abrasion, QUV & high temp./humidity resistance

Matting agent dispersion

Partners of EBECRYL ® 8896:

The below resins endow EBECRYL 8896 with different features while keeping the soft feeling.

The suggested usage of EBECRYL 8894 is 20~50% weight of EBECRYL 8896.

Testing data & suggested formulations

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RCA is tested at 35µm thickness while pencil hardness is tested at 12µm on PC board.

Abrasion resistance (RCA) of different oligomers

Testing formulation

Oligomer 40 (solid)

CPK 2.0

TPO 0.4

EBECRYL®1360 0.2

Solvent 70-100

0

50

100

150

200

250

300

350

400

EBECRYL® 8896 EBECRYL 8894 EBECRYL 8896 + EBECRYL8894 (4:1)

130

>400

280

4B

3B

4B

RCA

Hardness

Rubbery Feel

Formulation - 1

EBECRYL ® 8896 50

NIPSIL E1011* 3.0

ACEMATT TS-100* 1.3

RHU-5070D** 2

EBECRYL 331 0.3

EBECRYL 1360 0.2

IRGACURE 754*** 2

LUCIRIN TPO*** 0.4

Solvent 110-140

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Starting point of formulation - Rubbery feel

Notes: spraying application, 35-50μm DFT; 1500mJ/cm2, 120w/cm Solvent: BAC(40); MIBK(30); PM(50)

* Recommended matting agents • Nipsil E1011 from TOSOH SILICA CORPORATION: amorphous silica (average PS : 1,5 µm) • Acematt TS-100 from Evonik : untreated silica (PS d50 = 9,5 µm)

** RHU-5070D from DAINICHISEIKA (DNS) : crosslinked PU bead *** BASF

Features:

Excellent soft and elastic feeling.

Good abrasion resistance. (RCA > 130@35μm.)

Good adhesion on PC.

Good nail scratch recovery.

Low yellowing.

Velvet Feel

Formulation - 2

EBECRYL ® 8896 40

EBECRYL 8894 10

NIPSIL E1011 5

Wax paste* 2-5

EBECRYL 331 0.3

EBECRYL 1360 0.5

IRGACURE 754 2

LUCIRIN TPO 0.4

Solvent 110-140

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Starting point of formulation - Velvet feel

Notes: spraying application, 35-50μm DFT; 1500mJ/cm2, 120w/cm Solvent: BAC(40); MIBK(30); PM(50)

Features:

Excellent soft and silky feeling.

Good adhesion on PC.

Good abrasion resistance. (RCA > 250@35μm.)

Good nail scratch recovery.

Improved QUV & humidity resistance.

Low yellowing.

*ZN-26 from GIFU : PE wax (average PS 5 μm)

Starting point of formulation - Leather feel

Formulation - 3 - 3

EBECRYL ® 8896 30

EBECRYL 8894 12

EBECRYL 8296 8

NIPSIL E1011 4.8

EBECRYL 331 0.5

EBECRYL 1360 0.3

IRGACURE 754 2

LUCIRIN TPO 0.4

Solvent 110-140

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Leather Feel

Notes: spraying application, 35-50μm DFT; 1500mJ/cm2, 120w/cm Solvent: BAC(40); MIBK(30); PM(50)

Features:

Good leather feeling.

Improved QUV & humidity resistance.

Excellent abrasion resistance. (RCA>300@50μm）

Good nail scratch resistance.

Low yellowing.

Primer for ABS, PC, ABS + PC

Suggested formulation for soft touch coating primer

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Formulation - 4

EBECRYL ® 8465 40

EBECRYL 8896 45

MODAFLOW 9200 0.2

TMPTA 5

HDDA 7

LUCIRIN TPO 2

IRGACURE 754 1

Solvent 120

Function: In case of the adhesion problem with ABS, PC & PC/ABS, this primer formulation is suggested to coat underneath the soft touch coating. It can also help to improve the tear resistance to heavy nail scratch. A slightly tack of the primer surface can further improve the cohesion.

Notes: spraying application; 300-600mJ/cm2. Solvent: BAC(40); MIBK(30); PM(50)

Question & Answer

Q1: Can other soft feelings be reached besides rubber, velvet & leather feeling?

Answer: Absolutely. You can get all kinds of soft feelings by blending EBECRYL®8896 with EBECRYL 8894 or other oligomers, fillers.

Q2: How to reduce the smell of cured film?

Answer: Smell comes from photoinitiators. ESACURE ONE* and IRGACURE 754 & 2959** are proved to be good choices. Of course, you can follow proposals from photoinitiators producers.

Q3: Do matting agent have an effect on soft feeling? How to disperse it well?

Answer: Yes, absolutely. And different matting agent gives different soft feeling. But the binder is the most crucial. EBECRYL 331 can disperse matt agents well and EBECRYL 1360 is a good anti-float agent.

Q4: Which solvents are suitable to use?

Answer: Solvents such as esters, alcohol ethers, ester ethers, ketones are preferred.

Q5: How to get high film thickness while the liquid coating is low solid content at spraying phase?

Answer: Usually, film thickness should be 35-50μm to get desirable soft feeling. So double sprayings are needed and the process is spraying, short-time flash off and spraying again.

Q6: How to improve the QUV and hydrolysis resistance?

Answer: You can improve it with co-binder EBECRYL 8894.

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*from IGM **from BASF

www.allnex.com

PLEASE CONTACT:

• Robert Potzmann at robert.potzmann@allnex.com (EMEA)

• Johnny Zhang at johnny.zhang@allnex.com (GC)

• Marcus Hutchins at marcus.hutchins@allnex.com (NA)

• Chuleekorn Weeraruk at chuleekorn.weeraruk@allnex.com (ROA)

Any questions ?

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disclaimer

Notice: Trademarks indicated with the ®, ™ or * are registered, unregistered or pending trademarks of Allnex IP s.à.r.l. or its directly or indirectly affiliated Allnex Group companies. Disclaimer: Allnex Group companies (“Allnex”) decline any liability with respect to the use made by anyone of the information contained herein. The information contained herein represents Allnex's best knowledge thereon without constituting any express or implied guarantee or warranty of any kind (including, but not limited to, regarding the accuracy, the completeness or relevance of the data set out herein). Nothing contained herein shall be construed as conferring any license or right under any patent or other intellectual property rights of Allnex or of any third party. The information relating to the products is given for information purposes only. No guarantee or warranty is provided that the product and/or information is adapted for any specific use, performance or result and that product and/or information do not infringe any Allnex and/or third party intellectual property rights. The user should perform his/her own tests to determine the suitability for a particular purpose. The final choice of use of a product and/or information as well as the investigation of any possible violation of intellectual property rights of Allnex and/or third parties remains the sole responsibility of the user. © 2016 Allnex Belgium SA. All Rights Reserved

9 March 2017 14

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9 March 2017

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