Preparation and properties of waterborne poly(urethane acrylate)/silica dispersions and hybrid composites

• Published in: Plastics, rubber & composites Vol. 41; no. 10; pp. 418 - 424
• Main Authors: Wang, Y Y, Qiu, F X, Lv, Y F, Xu, J C, Yang, D Y
• Format: Journal Article
• Language: English
• Published: London, England Taylor & Francis 01.12.2012; SAGE Publications; Maney
• Subjects: Acrylates; Applied sciences; Dispersions; Exact sciences and technology; Hybrid composites; Hybrid material; Mechanical properties; Mechanical property; Nanostructure; Physicochemistry of polymers; Polymer industry, paints, wood; Sealers; Silicon dioxide; Sol-gel method; Technology of polymers; Water resistance; Waterborne polyurethane acrylate; Waterborne polyurethane acrylate; Sol–gel method; Hybrid material; Mechanical property; Sol-gel method; Leather; Silica; Water absorption; Chemical properties; Adhesive; Coating material; Wood; Ester polymer; Mechanical properties; Polymer; Hardness; Physical properties; Hybrid composite; Tensile strength; Coupling agent; Hydrolysis; Waterproofness; Acrylate polymer; Sol gel process; Preparation; Polyurethane; Concentration effect; Sealing material; Aqueous dispersion
• ISSN: 1465-8011; 1743-2898
• DOI: 10.1179/1743289812Y.0000000010

The waterborne polyurethane acrylate (PUA) dispersion was prepared based on polyester polyol, isophorone diisocyanate, dimethylol propionic acid, butyl acrylate and trimethylolpropane triacrylate. Then, a series of PUA/SiO 2 hybrid dispersions were prepared from PUA dispersion, coupling agent 3-glycidyloxypropyl trimethoxysilane and different content tetraethoxysilane hydrolysis solutions by the sol-gel process. The physical properties of PUA/SiO 2 hybrid dispersions and the mechanical properties of PUA/SiO 2 hybrid composites were measured. The PUA/SiO 2 hybrids were characterised. The results showed that the nano-SiO 2 particles of the hybrids had good dispersion and formed a good interfacial bonding layer on its surface. When the tetraethyl orthosilicate content was 0·5 wt-%, the hybrid film exhibited excellent comprehensive mechanical properties and water resistance. The tensile strength, hardness and water absorption of the film were 3·32 MPa, 90 and 6·7% respectively. The obtained PUA and hybrid composites have great potential application, such as coatings, leather finishing, adhesives, sealants, plastic coatings and wood finishes.