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Dianal TB-173
Dianal TB-173 is an acrylic bead resin with a high density of hydroxyl functional groups on the polymer backbone.
Fulfilled By ChemPoint
- Manufacturer: Mitsubishi Chemical Group
- Product Line: Elvacite® Specialty Acrylic Resins
- Product: Elvacite® Methacrylate Copolymers
- Industries: Coatings
- Authorized Countries: Canada | United States
Documents
Overview
Dianal TB-173 is a solid-bead acrylic polyol resin, containing a very high density of hydroxyl functional groups on the polymer backbone, with a hydroxyl number of 86 mg KOH per gram resin. This specification makes it unique amid the range of Dianal resins, as this is among the highest of hydroxyl numbers. These functional groups are used to react with isocyanates to create ambient-cure polyurethanes. Dianal TB-173 is soluble in a variety of solvents, including those which are classified by the U.S. EPA to be VOC exempt, such as t-butyl acetate, acetone, and PCTBF. Dianal TB-173 is used in industrial coating applications with acrylic polyols and in automotive refinish coatings. In automotive refinish formulations, it enhances intercoat adhesion between the topcoat and basecoat. TB-173 forms films that are highly resistant to weathering, abrasion, moisture, yellowing due to UV exposure, and attack from dilute acids and bases.
Specifications
Glass transition temp, calculated onset °C: 50
Molecular weight: 15,000
Acid number, mg KOH/g resin: 10
Hydroxyl number, mg KOH/g resin: 86
Primary Chemistry: Acrylic
Features & Benefits
High hydroxyl group content
Soluble in a variety of solvents, including those classified as VOC exempt by the U.S. EPA
Films formed generally have improved resistance to abrasion, moisture, weathering, and chemical attack
Reduces intercoat adhesion failure between basecoats and topcoats
Problems Solved
Poor durability stemming from susceptibility to abrasion and scratches
Dissolution due to moisture or chemical attack
Delamination or durability issues of coatings, especially in automotive topcoats and basecoats
High VOCs in coating formulations
Applications
Automotive refinish coatings
Industrial coatings
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