Aliphatic Wood Coatings

Bayer BMS
Outline

 Aliphatic Wood Coating

 Market for new Wood Coating Some chemistry New Formulations Data and Results
Aliphatic Wood Coatings 

Market Traditional wood coatings are acid 

formaldehyde omitting

 Environmentally unfriendly

 Desmophen 1300/ Desmodur HL

 Contains HDI/TDI mixture

 Not 100% light stable

 Requests for all aliphatic wood coat

 100% Light stable
Aliphatic Wood Goals

 Give customers formulating options 

utilizing 2K solvent borne aliphatic wcoatings

 Develop 100% light stable formulat

lower VOC than traditional recomm

 Generate data to support an E-blas

coatings
Traditional Aliphatic Wood 

Coating Old Formulation (control)-Desmoph

and Desmodur N 75

 Traditional recommendation High VOC Fast dry time with a long pot life

 Want more options for customers

 Match or improve properties at a lowe
Polyol & Aliphatic Isocyana

 Polyol- OH function 

acrylic

 Isocyanate – HDI or 

HDI/IPDI based

 Aliphatic

 Light Stable Gloss retention Chemical resistance

(

CH

2

CCH

3

CH

2

C 

O

OR 
HDI vs IPDI Isocyanates

 HDI

 Hexamethyl diisocyanate

 Exterior polyurethane

 Light stable

 low free monomer 

content

 High functionality with 

low viscosity

 Excellent resistance to 

chemicals, abrasion, weathering

 IPDI

 Isophorone 

 Exterior p

 Light sta

 Less reac Increase  Faster ph

times, haimprove g

OCN

NCO

CH

3

OCN

CH 

3
Developing New Options fo

an Aliphatic Coating Polyol

 Desmophen A HS 1060

 Fast drying acrylic

 Desmophen A HS 1272 BA

 Low viscosity for higher solids 

formulations

 Fast drying acrylic (not as fast 

as 1060)

 Isocyanate

 Desmodur NZ 1

 HDI/IPDI mixture 100% solids Commercially available High Viscosity

 Isocyanates

 Desmodur N 32

 HDI Biuret 100% solids

 Desmodur N 39

 HDI a-symm 100% solids Lower viscos

formulations

 Desmodur Z 44

 IPDI-trimer 70% solids Faster physic High viscosit

 Desmodur XP 2

 IPDI  Lower viscos 80% solids
New Formulations

 Desmophen A HS 1060 and Desmo

N3200/Z4470 (4.5 VOC target)

 Isocyanate mixture as follows

 100/0 90/10 80/20 70/30

 Also a formulation with Desmophen 

1060 and Desmodur NZ1 was done
New Formulations (2)

 Desmophen A HS 1272 BA and De

N3900/Z4470 (3.5 VOC target)

 Isocyanate mixture as follows

 100/0 90/10 80/20 70/30

 Also a formulation with Desmophen 

1272 BA and Desmodur NZ1 was d
New Formulations (3)

 Desmophen A HS 1272 BA and De

N3900/XP2565 (3.5 VOC target)

 Isocyanate mixture as follows

 90/10 80/20 70/30

 No 100/0 done because that was formula
Hard Dry Time

Hard Dry Times

01234567

Control

1060

10% 4470

20% 4470

30% 4470

NZ1

1272

10% 4470

20% 4470

30% 4470

10% 2565

205 2565

30% 2565

NZ1

Time (hours) Hard Dry

Hard Dry Times

0

0.10.20.30.40.50.6

Control 1060 10%

4470

20%

4470

Time (hours) 
Hardness

Hardness Development

0

50

100150200250

Control 10% 4470 30% 4470 1272 20% 4470 10% 2565 30% 2565

Hardness (seconds) 1 day 14 day

•HfohafaV
Pot Life

Pot Life

0

102030405060

0 100 200 300 400 500

Time elapsed (minutes)
Further Testing

 After evaluation of the data from the arra

formulation plus the control were chosen to stain testing

 Desmophen A1060 and Desmodur 3200 Desmophen A1060 and Desmodur 3200

(70/30)

 Desmophen A HS 1272 and Desmodur 3 Desmophen A HS 1272 and Desmodur 3

(70/30)

 Desmophen A HS 1272 and Desmodur 3

(70/30)
Stain Testing

 Testing both Kitchen 

Cabinets and Office Furniture standards

 Clear and White 

formulations 
Ctrl A D F I L A-W D-W F-W 

Mustard (1hour) NE NE NE NE NE NE NE NE NE 

Vinegar (24 hr) NE NE NE NE NE NE NE NE NE 

Lemon Juice (24 hr) NE NE NE NE NE NE NE NE NE 

Orange Juice (24 hr) NE NE NE NE NE NE NE NE NE 

Grape Juice (24 hr) NE NE NE NE NE NE NE NE NE 

Ketchup (24 hr) NE NE NE NE NE NE NE NE NE 

Coffee (24 hr) NE NE NE NE NE NE NE NE NE 

Olive Oil (24 hr) NE NE NE NE NE NE NE NE NE 

Ethanol (24 hr) NE NE NE NE NE VL NE NE NE 

Detergent (24 hr) NE NE NE NE NE NE NE NE NE 

Tap Water (24 hr) NE NE NE NE NE NE NE NE NE 

Red Wine (24 hr) NE NE NE NE NE NE NE NE NE 

Betadine (24 hr) NE NE NE NE NE NE NE NE NE 

Tap Water (16 hr) NE NE NE NE NE NE NE NE NE 

Coffee (16 hr) NE NE NE NE NE NE NE NE NE 

SODA (16 hr) NE NE NE NE NE NE NE NE NE 

Grape Juice (16 hr) NE NE NE NE NE NE NE NE NE 

Tomato Juice (16 hr) NE NE NE NE NE NE NE NE NE 

Mustard (16 hr) NE VL NE NE NE NE L VL VL 

Lip Stick (16 hr) NE NE NE NE NE NE NE NE NE 

Acetic Acetate (16 hr) NE NE NE VL VL VL NE NE VL 

Nail Polish Remover 

(16 hr) NE NE NE L NE NE NE NE L 

Acetone (16 hr) NE NE NE NE NE NE NE NE NE 

50% Ethanol in H2O 

(16 hr) NE NE NE NE NE NE NE NE NE 

Total Failures 0 1 0 2 1 2 1 1 
Recommendations 

 Based on customer needs, 

any of these resins could be viable recommendations

 Pigmentation of formulation 

changes chemical resistance

 Desmophen A 

gets to final hathan Desmoph1272 BA

 Desmodur Z 4

has better cheresistance

 Higher Desmo

content causephysical dry whigher produc