A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Polyurethane dispersions based on natural oil polyols for high performance wood coating applications
Aliphatic polyester polyols have been produced from seed oil with high renewable content and unique properties that enable the formulation of water borne coatings with low VOC (volatile organic compounds) content. Water borne PUDs (polyurethane dispersions) with excellent stability and differentiated properties were developed from anionically stabilized prepolymers of aliphatic isocyanates and NOP (natural oil polyols). The performance of the NOP based PUD was compared to an adipate based PUD and a caprolactone based PUD made with the same formulation and to commercial polyester and polycarbonate PUDs used in wood coatings. The developmental NOP based PUDs are NMP free and provide coatings with good mechanical properties including hardness and flexibility. They also exhibit superior performance attributes including water and acid etch resistance and wet adhesion compared to conventional PUDs. The high contact angle for water supports the increased hydrophobicity of the NOP UD coating. Fundamental material studies indicate that the NOP PUD exhibits phase separated morphology of hard and soft segment domains that enables enhanced properties such as modulus and toughness. Extensive application testing of the neat PUD, with and without an external crosslinker and in blends with a hydrophobic acrylic latex was conducted. The NOP PUD exhibits differentiated performance, such as early water resistance and fast hardness development, in comparison to commercial polyester and polycarbonate PUDs used in wood coatings.
Polyurethane dispersions based on natural oil polyols for high performance wood coating applications
Aliphatic polyester polyols have been produced from seed oil with high renewable content and unique properties that enable the formulation of water borne coatings with low VOC (volatile organic compounds) content. Water borne PUDs (polyurethane dispersions) with excellent stability and differentiated properties were developed from anionically stabilized prepolymers of aliphatic isocyanates and NOP (natural oil polyols). The performance of the NOP based PUD was compared to an adipate based PUD and a caprolactone based PUD made with the same formulation and to commercial polyester and polycarbonate PUDs used in wood coatings. The developmental NOP based PUDs are NMP free and provide coatings with good mechanical properties including hardness and flexibility. They also exhibit superior performance attributes including water and acid etch resistance and wet adhesion compared to conventional PUDs. The high contact angle for water supports the increased hydrophobicity of the NOP UD coating. Fundamental material studies indicate that the NOP PUD exhibits phase separated morphology of hard and soft segment domains that enables enhanced properties such as modulus and toughness. Extensive application testing of the neat PUD, with and without an external crosslinker and in blends with a hydrophobic acrylic latex was conducted. The NOP PUD exhibits differentiated performance, such as early water resistance and fast hardness development, in comparison to commercial polyester and polycarbonate PUDs used in wood coatings.
Polyurethane dispersions based on natural oil polyols for high performance wood coating applications
Trottier, Emile (author) / Argyropoulos, John (author) / Erdem, Bedri (author) / Nanjundiah, Kumar (author) / Guo, Jihui (author) / Kaufman, Mike (author) / Subramonian, Suresh (author) / Bhattacharjee, Debkumar (author) / Diehl, Charles (author)
2009
17 Seiten, 5 Bilder, 9 Tabellen, 16 Quellen
Conference paper
English
Novel solvent-free polyurethane dispersions for wood coating
| Tema Archive | 2006
Novel aqueous polyols for high performance multicomponent polyurethane coatings
| British Library Online Contents | 2000
Polyurethane-based Actuators with Various Polyols
| British Library Online Contents | 2010
High Solids Polyurethane Coatings from Castor-Oil-Based Polyester-Polyols
| British Library Online Contents | 2004
NMP free, high-quality pure polyurethane dispersions for site applied wood floor coatings
| British Library Online Contents | 2007