Study of the System Wood – Coating Material. Part 2.Wood – Solid Coating Material

Liptáková, Eva; Kúdela, Jozef

doi:10.1515/hf.2002.084

Cited by 13 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values are comparable with the data reported by Liptakova and Kudela. 12 They also found high values for polyurethanes, as is the case with these results.…”

Section: Resultssupporting

confidence: 76%

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

2008

View full text Add to dashboard Cite

Several solvent-and water-borne exterior wood coatings were artificially weathered to study their performance behavior. Penetration and layer thickness were measured on unweathered samples and compared to theoretical estimates by means of measured basic parameters of coating and substrate. Color, surface roughness, gloss, and adhesion were monitored during aging, and the latter two were also calculated and compared to their experimental values. Theoretical values of gloss, and especially those of adhesion, were less successful on an absolute scale, but were in accordance with practical values on a relative scale. The influence of solid content, drying speed, and viscosity on penetration depth manifested itself clearly both in theory and in practice. In general, solventborne coatings performed well, but some water-borne coatings also showed good performance. By measuring the characteristics of a coating as described in this article, it is possible to rank the coatings and follow their weatherability. Finally, calculation of theoretical values proved a promising method for initial screening purpose.

show abstract

“…The values are comparable with the data reported by Liptakova and Kudela. 12 They also found high values for polyurethanes, as is the case with these results.…”

Section: Resultssupporting

confidence: 76%

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

2008

View full text Add to dashboard Cite

show abstract

“…This is most probably a result of inner stresses in the coating near the phase boundary at large vessel lumina. Coating contraction can cause the formation of cavities between coating and cell wall as well as openings within the coating material that covers the pores (Liptáková and Kudela 2002). Once cracks appear in the coating water can easily penetrate the substrate.…”

Section: Discussionmentioning

confidence: 99%

Outdoor weathering performance parameters of exterior wood coating systems on tropical hardwood substrates

et al. 2014

View full text Add to dashboard Cite

Wood coating research almost exclusively focuses on softwood as substrate despite the fact that coatings applied on tropical hardwoods show a different weathering behaviour. The objective of this study was to quantify the impact of wood substrate and coating type on the weathering behaviour of finished wooden joinery in outdoor exposure using a set of statistical methods. Therefore, a broad range of white opaque paints and mid-oak semitransparent stains were used. The coatings were industrially applied on window frames made of frequently used commercial tropical hardwood species. The general appearance of the wood/coating systems was assessed visually using a rating scale that takes into account the anatomical characteristics of hardwood. A minimum required exposure time for evaluation of 2.5 years outdoor weathering for joinery in vertical position and facing south-west was determined. At 30 months best performances were recorded for waterborne alkyd primers with an acrylic topcoat when dry coating film was sufficiently thick. The dry layer thickness also affected the impact of the hiding power on the performance of the wood/coating system. Within hardwood species the degradation rate of coatings on species with a fine texture was the lowest. The significant influence of the substrate's texture on the weathering behaviour of coated hardwood stressed the need to evaluate the wood/coating system in total.

show abstract

“…The analysis was made in the temperature range 20-260°C by the use of open platinum crucibles, helium flow 2 dm 3 /h and heating rate 5°C/min. The adhesive properties of the investigated resin mixture were determined by evaluating the interactions occurring on the wood-adhesive phase boundary: the contact angle was determined by means of the method described by, among others, Liptàkovà and Kúdela (1994Kúdela ( , 2002, Kúdela and Liptáková (2006). To prepare the samples for investigations, the prepared adhesive mixture was applied on one side of the birch boards at a spread rate of 160 g/m 2 .…”

Section: Methodsmentioning

confidence: 99%

Fumed silica as a filler for MUPF resin in the process of manufacturing water-resistant plywood

Dukarska

Czarnecki

2015

Eur. J. Wood Prod.

View full text Add to dashboard Cite

This work examines the effect of applying fumed silica with nanoscopic-size particles as a filling material for melamine-urea-phenol-formaldehyde (MUPF) resin in the process of manufacturing water-resistant plywood. Moreover, this paper investigates the possibility of reducing the amount of MUPF resin mixture used in the process of gluing veneer sheets. Based on the investigations into the reactivity, viscosity and durability of MUPF resin mixture containing various amounts of nanofiller, it was found that the optimum amount of silica that can make the resin suitable for gluing sheets of veneer amounts to 2 PBW per 100 PBW of MUPF resin. The gluing properties for thus mixed resin were determined by measuring the contact angle and determining the parameters of its derivatives, which are an additional criterion for evaluating the gluing properties. The thermal stability was tested with simultaneous use of TG-DSC analysis. The experimental plywood manufactured using optimal nano-SiO 2 was tested in terms of bond quality and mechanical properties according to appropriate standards. The investigations prove that it is possible to apply fumed silica as a filling material for the resin in the process of manufacturing water-resistant plywood. Introducing the above-mentioned amount of fumed silica into the resin makes it possible to increase the activation energy of the cross-linking process of MUPF resin and to optimize the process of gluing the sheets of veneer. Moreover, it is also possible to produce plywood of the required water-resistance with the amount of adhesive mixture reduced by 30 %.

show abstract

Study of the System Wood – Coating Material. Part 2.Wood – Solid Coating Material

Cited by 13 publications

References 12 publications

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

Experimental and theoretical behavior of exterior wood coatings subjected to artificial weathering

Outdoor weathering performance parameters of exterior wood coating systems on tropical hardwood substrates

Fumed silica as a filler for MUPF resin in the process of manufacturing water-resistant plywood

Contact Info

Product

Resources

About