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TEGO® Antifoam products

for the Production of

SBR-Latex & SBR-Rubber

BL Interface & Performance

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Two Types of Styrene Butadiene Rubber (SBR)

Defoamer for the Production of SBR-Latex and SBR-Rubber

2. SBR-Rubber

▪ Synonyms: SBR, SBR-Elastomer, SB-Elastomer, SB-Rubber

▪ Solid material, properties similar to natural rubber, cross-linkable

▪ Main applications: tires, tubes, mechanical rubber goods, shoe sole

▪ 60% of globally produced SBR

1. SBR-Latex

▪ Synonyms: SB-Latex, SBR liquid

▪ Liquid material

▪ Main applications: paper coating, carpet backside, foams, asphalt

▪ 40% of globally produced SBR

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1. SBR-Latex and its Main Applications

Defoamer for the Production of SBR-Latex and SBR-Rubber

Paper coatings Carpet backings

65%

15%

8%

2%

9%*

Total market: 3,2 Mio t

Asphalt modificationFoams & adhesives

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TEGO® Antifoam in the Production of SBR-Latex

Defoamer for the Production of SBR-Latex and SBR-Rubber

Water

Monomer

Additives

Emulsifier:

Sulfonate

Sulfate

Ethersulfate

SBR-Latex

TEGO® Antifoam 2291

Monomer removal

(Styrene)

Reactor Stripper

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Test Method – Sintered Glass Test

Defoamer for the Production of SBR-Latex and SBR-Rubber

Preparation

One liter surfactant solution is poured into a 2-litre graduated cylinder.

Defined amount of prediluted antifoam is added.

Test

Six liters of air per minute are bubbled through the sintered glass into the solution

whereby foam is formed.

When the foam reaches the 2 liter mark antifoam is added again and the time is noted.

This is done for 30 minutes.

Analysis

The total number of dosages is used as measurement for the antifoam’s efficiency.

In case the antifoam efficiency is checked in emulsifiers or dispersants for the

production of polymer dispersions this test is run at 60 °C.

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Test Method – What the Sintered Glass Test looks like

Defoamer for the Production of SBR-Latex and SBR-Rubber

The cylinder has to be filled

with 1000 mL of surfactant

solution

When the foam reaches

2000 mL another amount of

antifoam is added

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TEGO® Antifoam 2291 is 2 to 3 Times More Efficient

Defoamer for the Production of SBR-Latex and SBR-Rubber

Less dosages (=shorter bar) means higher efficiency of the antifoam

0

2

4

6

8

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do

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Competitor 1

(Si-containing)

Competitor 2

(Si-free)

TEGO® Antifoam

2291

Sulfonate

Ethersulfate

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TEGO® Antifoam 2291 – Product Information

Defoamer for the Production of SBR-Latex and SBR-Rubber

100% active material, silicone free, dosage level: 0,01 - 0,1%

Can be used as delivered or from a predilution in water.

Compliant with Regulation (EU) 10/2011, BfR XIV, FDA 176.210,

FDA 175.105, FDA 175.300, FDA 176.170, FDA 176.180 and 177.2600

Is listed in the following chemical inventories:

EINECS, TSCA, ENCS, AICS, PICCS, CHINA, DSL, ECL, NZIOC

TEGO® Antifoam 2291 is a defoamer based on paraffinic oil

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2. SBR-Rubber and its Main Applications

Defoamer for the Production of SBR-Latex and SBR-Rubber

Mechanical goods

Non-tire automotive

Tires

75%

15%

6%

4%

Miscellaneous

Total market: 4,5 Mio t

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TEGO® Antifoam – Excellent Defoaming & no Fouling

Defoamer for the Production of SBR-Latex and SBR-Rubber

Water

Monomer

Additives

Latex

Coagulation

Rubber

Emulsifier:

Soap

TEGO® Antifoam

2450 / 2460 Acid

Reactor Stripper

Monomer removal

(Styrene)

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TEGO® Antifoam products are 1,5 to 6 Times More Efficient

Defoamer for the Production of SBR-Latex and SBR-Rubber

Less dosages (=shorter bar) means higher efficiency of the antifoam

0

2

4

6

8

10

12

14

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18

do

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Competitor 3 Competitor 4 TEGO®

Antifoam 2450

TEGO®

Antifoam 2460

Soap 1 (Italian Producer)

Soap 2 (German Producer)

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Conventional Antifoams can Create Undesired Fouling

Defoamer for the Production of SBR-Latex and SBR-Rubber

Reactor Stripper Coagulation

Rubber

Fouling = partial coagulation

Water

Monomer

Additives

Emulsifier:

Soap

AcidConventional Antifoams

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Test Method for Fouling Caused by Defoamer

Fouling/Coagulation test

▪ 100 g of the test dispersion including 0,1% defoamer as

delivered is poured into a beaker and stirred for 30 minutes

at 60°C.

▪ The dispersion is filtrated and the filter (with coagulate) is

dried in an oven.

▪ After that the amount of the dry coagulate is weighted.

Defoamer for the Production of SBR-Latex and SBR-Rubber

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No Coagulation Observed with TEGO® Antifoam 2450/2460

Dispersion 1 Dispersion 2

Controle 0,00g 0,02g

Competitor 3 0,02g 0,00g

Competitor 4 0,07g 0,05g

TEGO® Antifoam 2450 0,00g 0,00g

TEGO® Antifoam 2460 0,02g 0,00g

Defoamer for SBR-Latex 0,22g 0,31g

Standard Defoamer 0,24g 0,27g

Defoamer for the Production of SBR-Latex and SBR-Rubber

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TEGO® Antifoam 2450 & 2460 - Product Information

Defoamer for the Production of SBR-Latex and SBR-Rubber

We recommend to test both products in a specific formulation to identify the most suitable defoamer.

Dosage level: 0,02 – 0,2%

Can be used as delivered or from a predilution in water.

It is preferred to use the antifoam undiluted

Both compliant with FDA 176.210 and FDA 175.105, in addition 2450 compliant to Regulation (EU)

10/2011, BfR XIV

Listed in the following chemical inventories:

EINECS, TSCA, ENCS, AICS, PICCS, CHINA, DSL, ECL

TEGO® Antifoam 2450 is a defoamer based on vegetable oil, TEGO® Antifoam 2460 is a defoamer

based on mineral oil (2460), 100% active material, both contain no silicone oil

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TEGO® Antifoam and Emulsifiers for SBR-Latex & SBR-Rubber

Defoamer for the Production of SBR-Latex and SBR-Rubber

TEGO® Antifoam 2291 X X X X

TEGO® Antifoam 2450 X X

TEGO® Antifoam 2460 X X

Emulsifiers for E-SBR Production

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Overview Food Contact Status and National Registrations

Defoamer for the Production of SBR-Latex and SBR-Rubber

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0/2

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1

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6.2

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TEGO® Antifoam

2291X X X X X X X X

EINECS, TSCA, DSL,

ENCS, AICS, ECL,

PICCS, CHINA,

NZIOC

TEGO® Antifoam

2450X X X X

EINECS, TSCA, DSL,

ENCS, AICS, ECL,

PICCS, CHINA

TEGO® Antifoam

2460X X

EINECS, TSCA, DSL,

ENCS, AICS, ECL,

PICCS, CHINA

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TEGO® Antifoam for SBR – Your benefits & What You Can Expect

Defoamer for the Production of SBR-Latex and SBR-Rubber

TEGO® Antifoam 2291 for SBR-Latex

▪ Substantial cost savings due to 2 to 3 times higher efficiency

▪ Broad food contact status gives freedom for final applications, e.g. coated paperboard for food packaging

TEGO® Antifoam 2450 & 2460 for SBR-Rubber

▪ Substantial cost savings due to 1.5 to 6 times higher efficiency

▪ Products do not cause fouling/precipitation in stripper

Support by our technical team in testing and identifying the optimal defoamer for your specific

application!

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