amine free pud - uncg

Examination of an amine free PUD

David Folkman

Senior Applications Chemist

WOOD C&S20188th Wood Coatings and Substrates

Conference

Chart 2

Background: The case for amine free

• Triethyl amine (TEA) is the most common neutralization agent for PUDs.

• According to GHS labeling it is flammable, harmful and toxic to the skin and eyes.

• Due to this classification, resulting binders and paints with TEA >1% have classification:

• TEA is listed as a Hazardous Air Pollutant and has a significant impact on emissions and indoor air quality.

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OCN-R-NH-C-O-P-O-C-HN-R-NH-C-O

COO- +NHR3

CH3

O-C-NH-R-NCO

O O

O

O

NR3

OCN-R-NH-C-O-P-O-C-NH-R-NH-C-O

COOH

CH3

O-C-NH-R-NCO

O O

O

O

CatalystNMPAcetone or MEKReactive diluent

Polyurea/urethaneDispersion

Water/polyamine

COO- NR4+

COO- + NHR3

OCN-R-NCO + OH-P-OH + COOH

CH3

HOCH2 CH2OH(Polyisocyanate) Polyol

DMPA

PUD ChemistryPUD ChemistryPUD ChemistryPUD Chemistry

50-500 nm

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UAF – Technical Data

Solids content 39 – 41%

Viscosity 20 – 200mPas

pH 7.0 – 8.5

MFFT approx. 25°C

Neutralization Ammonia

Self-crosslinking yes

Product Features

High surface hardness

Very good chemical resistance

Furniture coatings

Wood floor coatings

1pack and 2pack applications

| Chart 5

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Furniture Finish

• UAF has been evaluated for use as a clear

topcoat in KCMA/Furniture applications.

• With and without carbodiimide cross-linker.

• Coatings were evaluated as a self-sealing

product and over an acrylic sealer.

6

Item Weight

Amine Free Urethane 74.1

Water 5.8

DB 2.9

DPnP 2.9

Surfactant 0.8

Defoamer 0.4

Duller 1.6

Water 7.4

Wax 3.3

Rheology Modifier 0.8

Total 100.0

Wt Solids (%) 33.2

VOC (g/L) 164.3

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Carbodiimide

16/10/2018 7

•Improved Solvent Resistance And Durability Of Water Based Latex Coatings.

•Transforms Thermoplastic Latex Coatings Into Higher Performance Cross-Linked Coatings.

•Stable For Up To 60 Days After Mixing With The Latex

•Cross-Links Through The Carboxyl Functional Group Of The Latex, Also Cross-Links -NH2 Groups

•Low Toxicity Crosslinker

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Evaluations on Leneta Charts

Application:

Make a 1.5 Bird draw down on Form 3B-H Leneta card. Air

dry for 15 minutes. Force dry for 15 minutes at 50C. Age

seven days before testing.

1 hour spot test:

Mustard

16 hour spot tests:

Ethanol (50%)

Coffee

Red Wine

Coatings are evaluated with and without carbodiimide

cross-linker.

16/10/2018 8

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Chemical/Stain Resistance

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0

1

2

3

4

5

50% Ethanol Coffee Red Wine

UAF UAF + Carbo

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Chemical/Stain Resistance – Mustard – 1 hour

16/10/2018 10

0

1

2

3

4

5

UAF UAF + Carbo

initial after recovery

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Evaluations on Wood Panels

Application:

Spray sealer coat @ 4 – 5 wet mils; air

dry 15 minutes; force dry 15 minutes

@ 50C; cool and sand. Spray topcoat @

4 – 5 wet mils; air dry 15 minutes;

force dry 15 minutes @ 50C.

Age 7 days to test.

All coatings have 6% Carbodiimide

Chemical resistance

Boiling water resistance – 1 hour

Scrape adhesion

Fingernail Mark

Taber Abrasion

Edge soak

11

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Chemical/Stain Resistance

16/10/2018 12

0

1

2

3

4

5

50% Ethanol Coffee Red Wine 28% Ammonia

UAF/Acrylic Seal UAF Self Seal

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Chemical/Stain Resistance – Mustard – 1 hour

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0

1

2

3

4

5

UAF + Acrylic Sealer UAF self-seal

initial after recovery

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Boiling Water Resistance

16/10/2018 14

0

1

2

3

4

5


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Scrape Adhesion – 5 Kg

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0

1

2

3

4

5


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Fingernail Mark Resistance

16/10/2018 16

0

1

2

3

4

5


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Taber Abrasion

Application:

6.0 Bird draw down on black

scrub paper; air dry.

Age 7 days to test.

16/10/2018 17

0

5

10

15

20

UAF UAF + Carbo

mg lost

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Edge Soak

Application:

Spray sealer coat @ 4 – 5 wet

mils on solid red oak; air dry 1

hour and sand; spray topcoat

at 4 – 5 wet mils; air dry 15

minutes; force dry 15 minutes

at 50C; age 7 days. Place

finished end grain area on

sponge soaked in 1%

detergent solution for 16

hours. Allow to recover for 4 –

8 hours. Examine for blushing

and cracking.

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0

1

2

3

4

5


Blushing Cracking

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Wet Sponge on Finished Face

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0

1

2

3

4

5


Blushing Cracking

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Conclusions Furniture

- Excellent ethanol resistance

- Excellent Taber abrasion resistance

- Very good water resistance

- Excellent wood warmth

- Atomizes well and builds well

- The addition of Carbodiimide improves properties

16/10/2018 20

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Wood Floor Finish

UAF has been evaluated for use in a

wood floor coating.

16/10/2018 21

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Formula

• Formula Tested 1K and 6% Carbodiimide

Weight Solids 30%VOC 100 grams/liter

Description % Weight % Volume

Amine Free Urethane 69.19 67.97

Defoamer 0.1 0.1

Water 22.13 22.79

Dipropylene glycol propyl ether 2.96 3.3

Wetting and leveling agent 0.49 0.49

Wax Emulsion 4.94 5.14

Rheology Modifier 0.2 0.2

Total 100 100

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Finish Examination

Physical Performance Criteria

% Gloss Loss measured by Green Scotch Brite pad 200 Gram Weight for 10 back

and forth cycles

Hardness by Koenig Pendulum in Seconds

Taber Abrasion in milligrams loss using 1000 cycles / 1000 grams / CS-17 Wheel

Black Heel Mark Resistance using a Hockey Puck

Coefficient of Friction

Fingernail Mar Resistance

The products were tested after 1 week of cure.

10/16/2018 23

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Finish Examination

Chemical Performance Criteria

DI Water - 4 hours covered

1.5% Pine Sol - 4 hours covered

Vegetable oil - 4 hours covered

100 Proof Ethanol – 1 hour covered

VM&P Naphtha - 1 hour covered

Beer - 1 hour covered

Cola - 1 hour covered

The products were tested after 1 week of cure.

2410/16/2018

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% Gloss Loss

0

5

10

15

20

25

30

35

40

UAF Finish UAF + Carbo Commercial 2K NCO

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Koenig Hardness in Seconds @ 1 Week

0

20

40

60

80

100

120

140

160


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Taber mg Loss

0

5

10

15

20

25

30


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BHMR

0

1

2

3

4

5


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CoF

0

0.1

0.2

0.3

0.4

0.5

0.6


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Fingernail Mar

0

1

2

3

4

5


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Chemical Resistance

UAF Finish UAF + Carbo Comm 2K NCO

DI Water Pass Pass Pass

100 Proof Ethanol Pass Pass Pass

Cleaning Sol'n Pass Pass Pass

Veg Oil Pass Pass Pass

VM&P Naphtha Pass Pass Pass

Beer Pass Pass Pass

Cola Pass Pass Pass

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Green Seal Testing

Green Seal provides science-based environmental certification standards that are credible, transparent and essential to helping manufacturers, purchasers and consumers make responsible choices that positively impact business behavior and improve quality of life. Thousands of products and services in hundreds of categories have been certified to meet Green Seal standards. Green Seal provides public education and guidance for creating a more sustainable world.

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Green Seal Specifications GS-11 Paints, Coatings, Stains, and Sealers

Wood Finishes for Interior Use

Pencil Hardness. When prepared and tested on a 1 mil thick dry film according to

ASTM D 3363 – 92a, the product shall have a pencil hardness of 2H or greater.

All greater than 3H

Adhesion. The product shall have an adhesion of 4B or higher after 7 days cure

time when tested according to ASTM D3359 on a dried film of 0.5 to 1 mil

thickness.

All are 4B or higher

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Green Seal GS-11 Paints, Coatings, Stains, and Sealers Chemical Test Results


DI Water Pass Pass Pass

Hot DI Water Pass Pass Pass

100 Proof Alcohol Pass Pass Pass

Vinegar Pass Pass Pass

5% NaOH Solution Pass Pass Pass

5% HCL Solution Pass Pass Pass

Pine Sol Pass Pass Pass

Detergent Solution Pass Pass Pass

VM&P Naphtha Pass Pass Pass

Olive Oil Pass Pass Pass

Mustard Pass Pass Pass

Catsup Pass Pass Pass

Coffee Pass Pass Pass

Red Wine Pass Pass Pass

Motor Oil Pass Pass Pass

Chemical Resistance. When tested according to ASTM D1308 for 1 hour with the covered spot test and 1 hour recovery period over the intended substrate, the product shall demonstrate a rating of 8 as per ASTM STP500.

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Green Seal GS-11 Paints, Coatings, Stains, and Sealers Specifications

PRODUCT-SPECIFIC HEALTH AND ENVIRONMENTAL REQUIREMENTS

The product shall not contain any ingredients that are carcinogens, mutagens, or

reproductive toxins

Prohibited Ingredients. The product shall not contain the following ingredients:

1,2-dichlorobenzene, Alkyl phenol ethoxylates, Formaldehyde donors, Hazardous

air pollutants, Halogenated solvents, Ozone-depleting compounds, Heavy metals:

lead, mercury, cadmium, hexavalent chromium, and antimony in the elemental

form or compounds, The phthalate esters: o di (2-ethylhexyl) phthalate o butyl

benzyl phthalate o di-n-butyl phthalate o di-n-octyl phthalate o diethyl phthalate o

dimethyl phthalate, Triphenyl tins and tributyl tins and Triclosan

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Green Seal GS-11 Paints, Coatings, Stains, and Sealers

Volatile Aromatic Hydrocarbons. The product shall contain no more than 0.5% by

weight of sum total of volatile aromatic hydrocarbons.

Volatile Organic Compounds (VOCs). 16 The VOC content of the product shall not

exceed the current content limits for its product category as set by CARB, 17

unless specified otherwise in this standard.

Wood Coatings - 275 grams/liter VOC

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UAF Conclusion

• Amine Free

• Hard/Tough

• Chemical Resistance

• 1 and 2 Pack Finishes

• Very Good Furniture Coating

• Very Good 2 Pack Wood Floor Finish

• When Formulated Correctly it is possible to be both Green Seal and MFMA

approved

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Thank You

David FolkmanSenior Applications ChemistAlberdingk [email protected]

Personal Thanks:

Jim BohannonLaurie MorrisDr. Terri Carson

amine free pud - uncg

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