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Novel Isocyanate-Free Resins for 1- and 2K Protective Coatings

Environmental, market, and cost pressures have led to the development of alternatives to conventional 2K polyurethane topcoats, including isocyanate-free binders. For example, 1- and 2K coating systems based on alkoxysilane chemistry find increased use in protective coatings. 

Product Number: 51219-193-SG
Author: Denis Heymans, Catherine Romanowska, Marcelo Herszenhaut
Publication Date: 2019
Industry: Coatings
$0.00
$20.00
$20.00

Environmental, market, and cost pressures have led to the development of alternatives to conventional 2K polyurethane topcoats, including isocyanate-free binders. For example, 1- and 2K coating systems based on alkoxysilane chemistry find increased use in protective coatings. Besides conventional acrylic monomers, polymer chemists have at their disposal various versatile building blocks, such as neoacid derivatives. Neoacid esters are widely used to upgrade solvent- and waterborne resins for both decorative and protective coatings. Among other benefits, these very hydrophobic monomers reduce surface tension and improve flow, durability, chemical, and UV resistance. This paper 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. Polymers with solids content ranging from 70- to 100-% were produced using this technology and were formulated into 1- and 2K protective coatings (both clear and pigmented). These coatings were compared with 2K polyurethane and acrylic silane systems for usual performance parameters. The paper displays performance of the various coating systems and discusses the relationship between resin processing/composition and coating performance

Environmental, market, and cost pressures have led to the development of alternatives to conventional 2K polyurethane topcoats, including isocyanate-free binders. For example, 1- and 2K coating systems based on alkoxysilane chemistry find increased use in protective coatings. Besides conventional acrylic monomers, polymer chemists have at their disposal various versatile building blocks, such as neoacid derivatives. Neoacid esters are widely used to upgrade solvent- and waterborne resins for both decorative and protective coatings. Among other benefits, these very hydrophobic monomers reduce surface tension and improve flow, durability, chemical, and UV resistance. This paper 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. Polymers with solids content ranging from 70- to 100-% were produced using this technology and were formulated into 1- and 2K protective coatings (both clear and pigmented). These coatings were compared with 2K polyurethane and acrylic silane systems for usual performance parameters. The paper displays performance of the various coating systems and discusses the relationship between resin processing/composition and coating performance

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