NOVEL ISOCYANATE-FREE RESINS FOR ONE-AND TWO-COMPONENT PROTECTIVE COATINGS

Two-component polyurethane systems (2K PL)) are the most widely used topcoats for high-quality protective applications. These coatings combine outstanding chemical and weathering resistance with excellent mechanical properties, but environmental, market and cost pressures have led to the development...

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Bibliographic Details
Published inJournal of protective coatings & linings Vol. 36; no. 2; pp. 28 - 32
Main Authors Heymans, Denis, Romanowska, Catherine, Herszenhaut, Marcelo
Format Journal Article
LanguageEnglish
Published Pittsburgh Technology Publishing Company 01.02.2019
Subjects
Acids
Carbon monoxide
Chemical industry
Chemistry
Chemists
Contact angle
End users
Esters
Isocyanates
Market penetration
Mechanical properties
Molecular weight
Monomers
Organic chemistry
Polyesters
Polymers
Polyurethane resins
Process parameters
Protective coatings
Resins
Retention
Solvents
Weathering
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Summary:Two-component polyurethane systems (2K PL)) are the most widely used topcoats for high-quality protective applications. These coatings combine outstanding chemical and weathering resistance with excellent mechanical properties, but environmental, market and cost pressures have led to the development of alternatives to these conventional topcoats, including isocyanate-free binders. Besides conventional acrylic monomers, polymer chemists have at their disposal various versatile building blocks, such as neoacid derivatives. This article presents a new family of polymers, combining neoacid esters and alkoxysilane monomers. Variation of process parameters, monomer composition and level of alkoxysilane yielded a series of polymers with a range of properties. Resins combining vinyl neoesters and alkoxyysilane monomers can be formulated into 1K coatings with pot lives of at least several months. Unlike with 2K systems, end users would not need to mix two components shortly before use. Also, vinyl silane systems are free of toxic isocyanates. High-solids coatings based on vinyl silane binders potentially dry faster, can be formulated at higher solids than 2K PU systems and can offer similar weathering performance.
ISSN:8755-1985