Adhesion - Epoxy + Acrylic floor paint on #Controllinnerseal impregnated #concrete

ADHESION TEST

Adhesion - Epoxy + Acrylic floor paint on Controll®INNERSEAL impregnated concrete The purpose with this test was to find out how Controll®INNERSEAL and Controll®INNERSEAL PLUS affect adhesion for two common Epoxy and Acrylic floor paints on impregnated concrete.

This test was performed by SP Technical Research Institute of Sweden, Chemistry division (SWEDAC accredited laboratory) according to ISO-4694 standard.

Beckers EPOXI EPX-V and Acrylic FLOOR PLUS are two frequently used indoor and outdoor paints on industrial floors, balconies, walkways etc. They were applied on concrete plates impregnated with different amount of Controll®INNERSEAL and Controll®INNERSEAL PLUS(+).

As reference was non-impregnated concrete plates used. The impregnated plates cured for three weeks before they were painted. The adhesion test was done one month after painted.

Result Controll®INNERSEAL and Controll®INNERSEAL PLUS(+) improved adhesion for Epoxy. Acrylic adhesion was also improved by two applications of Innerseal but decreased slightly after 4 and more. Note that the actual number of applications cannot be used as a fact for real projects as each concrete surface absorb differently and therefore require different amount of impregnation in order to fill up pore and capillaries. Puddles of impregnation will for sure decrease adhesion for paint. In general Epoxy has stronger adhesion than Acrylic. By roughen the impregnated concrete surface slightly with sandpaper, adhesion improve significantly.

EPOXI FLOOR PAINT - Beckers EPX-V Average force (N)

Coefficient of variation (%)

Reference Reference / No impregnation

1000

19

I2

Innerseal / 2 times

1280

29

I4

Innerseal / 4 times

1080

20

I6

Innerseal / 6 times

938

23

I2 I

Innerseal PLUS / 1 time

1760

24

I2 II

Innerseal PLUS / 2 times

1520

24

I2 III

Innerseal PLUS / 3 times

1480

21

Slip 2

Innerseal / 2 times / surface slightly sandpapered

1290

30

Slip 4

Innerseal / 4 times / surface slightly sandpapered

1370

21

Slip 6

Innerseal / 6 times / surface slightly sandpapered

1460

14

(White)

ACRYLIC FLOOR PAINT - Beckers Floor Plus

Mark

Product/impregnation

Average force (N

Coefficient of variation (%)

Reference Reference / No impregnation

702

33

I2

Innerseal / 2 times

807

31

I4

Innerseal / 4 times

683

13

I6

Innerseal / 6 times

621

30

Mark

Product/impregnation

KOMSOL INTERNATIONAL | GERMANY | SPAIN | SWEDEN | NORWAY www.komsol.eu | www.komsol.se

ADHESION TEST

Reference Acrylic (white) – Reference Epoxy (gray)

Innerseal 2, 4, 6 times. Epoxy

Innerseal 2, 4, 6 times, sanded. Epoxy

Innerseal Plus 1, 2, 3 times + Epoxy

Innerseal 2, 4, 6 times + Acrylic

KOMSOL INTERNATIONAL | GERMANY | SPAIN | SWEDEN | NORWAY www.komsol.eu | www.komsol.se

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issued by an Accredited Testing Laboratory Contact person

Date

Rerere nce

Page

Erik Lindhagen

2013-01 -31

3FOOI783

I (2)

1002 ISOllEe ! 7025

SP Chemistry, Materials and Surfaces

+46 10 516 58 72

N iclas Schonfelder

Erik.Lindhagen@sp.se

Komsol AB Ekonomi viigen 4 43633 ASKIM

Adhesion to concrete (1 appendix)

Commission Testing the adhesion of paint on concrete substrates.

Samples Five concrete substrates were delivered to SP on Jan 7 2013. They were divided in zones with different marking and painted with grey paint marked epoxy and white paint marked akrylat.

The epoxy-paint was divided in zones with the following markings;

• • • • •

• • • • •

Nollprov ( i.e. Reference sample) 12 14

16 121 12 II 12 III Slip211110 Slip 412110 Slip 613110

The acrylic paint was divided in zones with the following markings; •

Nollprov ( i.e. Reference sample)

• • •

12 14 16

Preparation On each sample surface at least 7 steel dollies were glued with cyan acrylic glue. The glue was allowed to harden for at least 48h prior to testing. During this time the samples were stored in a room with constant climate of 23±2°C, 50± lO%RH.

Testing The tests were conducted according to ISO 4624 on Jan 29 with the following exceptions .

SP Technical Research Institute of Sweden Postal address

Office location

Phone / Fax / E-mail

SP Box 857

Vasterasen Brinellgatan 4

<46 105165000 <4633135502

SU01 15 BORAs

SE-50462 BORAs

info@sp.se

Sweden

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Laboratories are accredited by the Swedish Board for Accreditation and Conformity Assessment (SWEDAC) under the terms of Swedish legislation .

This report may not be reproduced other than in full, except with the prior written approval of the issuing laboratory .

Date

Refererce

p,,,

2013-01-31

3F001783

2 (2)

Niclas Schonfelder

Out of fear to damage the paint layer there was no drilling or cutting around the dollies prior to testing. For practical purposes no outer ring was used. This is not believed to have influenced the measurements much.

The dollies were pulled of using a Zwick z lOO universal testing machine with a 2,5kN loadcell. SP inventory number 301037 and 90 1319. The pull speed was 0,8MPais and a pre-load of 2N was chosen.

Results Below the average force and coefficient of variation are presented for each zone. The complete results can be found in appendix 1. The coefficient of variation is quite large and this is believed to be mostly due to variations in the concrete substrates.

At large all failures for the epoxy-paint were estimated to be cohesion-failures in the substrate.

Similarly all acrylic-paint fai lures were estimated to be adhesion failures, except the reference that was estimated to be cohesion failure in the substrate.

Epoxy Reference sample [2 [4 [6 12 I 12 II 12 III Slip 2 11 /10 Slip 4 12/ 10 SliI>6 13/1 0

Average force (N) 1000 1280 1080 938 1760 1520 1480 1290 1370 1460

Coefficient of variation (%) 19 29 20 23 24 24 21 30 21 14

Acrylic Reference sample 12 14 [6

A verage force (N) 702 807 683 621

Coefficient of variation (%) 33 31 13 30

SP Technical Research Institute of Sweden

Appendix

SP Technical Research Institute of Sweden