Industrial Coatings

Technical Data Sheet

Laromer® LR 9000

Product Description Laromer® LR 9000 is a low-viscous, isocyanate-functional, unsaturated acrylic ester resin,
based on allophanated hexamethylene diisocyanate, for dual-cure coatings resistance to light
and weathering.

Key Features & Benefits - Dual-cure applications

- Pigment coating
- Excellent weather and scratch resistance
- Can be used as a sole binder
- Improves adhesion

Chemical Composition Isocyanato acrylate

Properties
Typical Characteristics Appearance low viscous liquid
Viscosity at 23°C (DIN EN ISO 3219) 1, 000 – 1,400 cps
Sheer rate D 6,700 s-1
Color value, platinum cobalt (Hazen, ISO 6271) ≤ 150
NCO content (DIN EN ISO 11909) 14.5 – 15.5%
NCO equivalent weight
(quantity of Laromer LR 9000 as supplied
containing 1 mol of active NCO) 289.7 – 271.0
Density at 50°C (DIN 51757, method 4.3) ~ 1.13 g/cm³

Solubility, diluent tolerance Can be thinned with the solvents common to the coatings industry (except for aliphatic hydrocarbons)
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and reactive thinners such as low-viscous acrylic esters and vinyl ethers such as Laromer BDDA and
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Laromer HDDA. Note: a possible increase in viscosity can be caused by components reacting with
isocyanate, such as water and alcohols.

Compatibility Can be thinned with esters such as butyl acetate, ketones such as methyl ethyl ketone, glycol ether
acetates such as methoxypropyl acetate, and aromatic hydrocarbons such as xylene.

These typical values should not be interpreted as specifications.

Applications
Laromer® LR 9000 is an isocyanate-functional, aliphatic acrylic ester and its reactivity recommends it
as both an isocyanate and an acrylic ester component for dual-cure applications. It is commonly used
in combination with resins containing hydroxylic groups or with other energy curable resins, mostly in
two-pack formulations.

Dual-cure applications formulated with Laromer® LR 9000 produce weather- and scratch-resistant
coatings. For pigmented coatings that cannot be cured by UV, thermal pre-curing is required. The
subsequent UV curing produces a coating with excellent resistance to weathering and scratching.

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 Laromer® LR 9000 is recommended for applications such as:
• Automotive OEM or refinish applications
• Interior/exterior general industrial metal coating applications
• Interior/exterior plastic components coating applications
• Interior/exterior wood coatings for floor, furniture, or millwork applications

A low-viscous resin, Laromer® LR 9000 may also be used as a sole binder. After exposure to UV
energy, the isocyanate groups react with both ambient and the substrate’s inherent moistures to form
a blister-free coating. Most notably, this one-pack application is suitable for both porous substrates
and those with poor adhesion properties.

The stoichiometrical reaction of the polyisocyanate component and the polyol (NCO:OH = 1) is
computed based on the NCO content:

0.075 × [OH value] × [non volatile fraction of polyol]

[NCO]

Some manufacturers state the content of hydroxylic groups as OH%, in which case the formula for a
stoichiometrical reaction changes to:

0.075 x [OH%] x [non volatile fraction of polyol]

17 x [NCO]
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example: Laromer PO 33

OH value (mg KOH/g polyol on solids) 30

Non volatile fraction (nvf) (%) 100
Laromer® PO 33, NCO content (%) 15

For a stoichiometrical reaction, the addition rate for Laromer® LR 9000 for each 100 grams of
Laromer® PO 33 F is:

0.075 x 100 x 30 = 15 g
15
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Processing Laromer LR 9000 can be diluted further for processing with suitable low-volatile monomers such as
mono-functional, di-functional, or tri-functional acrylic esters. The monomers are incorporated into the
film and thus influence its properties. Mono-functional monomers increase the flexibility; di-functional
monomers have little effect on hardness and flexibility; tri-functional monomers increase hardness of
the cured film.

Inert solvents can be used if an adequate flash-off zone is available. However, these solvents have to
be removed completely from the film prior to exposure to UV energy.

A suitable photoinitiator must be used to cure Laromer® LR 9000 with UV energy such as Darocur®
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1173, Darocur BP, Irgacure 184, Irgacure 819, Irgacure 2100, Lucirin TPO, and Lucirin TPO-L
for typical coating applications.
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Crosslinking Laromer LR 9000 is used in combination with hydroxy-functional resins (hydroxyacrylic resins,
hydroxy polyesters, hydroxy polyethers), aliphatic polyols or hydroxy-functional unsaturated acrylic
resins.

Safety
General The usual safety precautions when handling chemicals must be observed. These include the
measures described in Federal, State, and Local health and safety regulations, thorough ventilation of
the workplace, good skin care, and wearing of protective goggles.
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Material Safety Data Sheet All safety information is provided in the Material Safety Data Sheet for Laromer LR 9000.

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 Important
While the descriptions, designs, data and information contained herein are presented in good faith
and believed to be accurate, they are provided for guidance only. Because many factors may affect
processing or application/use, BASF recommends that the reader make tests to determine the
suitability of a product for a particular purpose prior to use. NO WARRANTIES OF ANY KIND,
EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE MADE REGARDING
PRODUCTS DESCRIBED OR DESIGNS, DATA OR INFORMATION SET FORTH, OR THAT THE
PRODUCTS, DESCRIPTIONS, DESIGNS, DATA OR INFORMATION MAY BE USED WITHOUT
INFRINGING THE INTELLECTUAL PROPERTY RIGHTS OF OTHERS. In no case shall the
descriptions, information, data or designs provided be considered a part of BASF's terms and
conditions of sale. Further, the descriptions, designs, data, and information furnished by BASF
hereunder are given gratis and BASF assumes no obligation or liability for the descriptions, designs,
data or information given or results obtained all such being given and accepted at the reader's risk.

Laromer is a registered trademark of BASF Group.

© BASF Corporation, 2010

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initiative in the USA, Canada, and Mexico.
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U.S. & Canada Mexico

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1609 Biddle Avenue Av. Insurgentes Sur # 975
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