Microcrystallinity and colloidal peculiarities of UF/isocyanate hybrid resins

Wieland, Stefanie; Pizzi, A.; Grigsby, Warren J.; Warnes, J.; Pichelin, Frédéric

doi:10.1002/app.24757

Cited by 13 publications

(6 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It was based on the stability of PMDI in water for about 5 h before being water-deactivated. Variations of the theme, such as the use of water emulsifiable blocked PMDI [163][164][165] and, more recently, of microencapsulated pMDI [166] have also been tried. They both worked and were attempted to see if an improvement on the original, simpler, system could be achieved.…”

Section: New Approaches To Synthetic Adhesivesmentioning

confidence: 99%

Wood Composites and Their Polymer Binders

2020

View full text Add to dashboard Cite

This review presents first, rather succinctly, what are the important points to look out for when preparing good wood composites, the main types of wood composites manufactured industrially, and the mainly oil-derived wood composite adhesives and binders that dominate and have been dominating this industry. Also briefly described are the most characteristic biosourced, renewable-derived adhesives that are actively researched as substitutes. For all these adhesives, synthetic and biosourced, the reviews expose the considerable progresses which have occurred relatively recently, with a host of new approaches and ideas having been proposed and tested, some even implemented, but with even many more already appearing on the horizon.

show abstract

Section: New Approaches To Synthetic Adhesivesmentioning

confidence: 99%

Wood Composites and Their Polymer Binders

2020

View full text Add to dashboard Cite

show abstract

“…Starch adhesives were modified by isocyanate as cross-linker [43] [52] for wood composite can be prepared with isocyante as crosslinker, influence factors on the bonding strength and water resistance of starch adhesive were studied by different solid content, adding isocyanate and additives like PVA, Acrylic emulsion. Bonding strength and water resistance were improved significantly by adding additives and isocyanates to starch.…”

Section: Other Polymer Additionmentioning

confidence: 99%

Factor Affecting Gel Time/Process-Ability of Urea Formaldehyde Resin Based Wood Adhesives

Gadhave¹,

Mahanwar²,

Gadekar³

2017

OJPChem

View full text Add to dashboard Cite

Urea-formaldehyde (UF) resin presents the most utilized adhesive system in the manufacture of plywood, particleboard and fiberboard. At the temperatures above 100˚C in the presence of hardener, this resin undergoes crosslinking reaction and the formation of three dimensional cross linked structures takes place and bonding of wood particles in a hot press [1]. UF powder resins show high reactivity and good performance in the production and by their low price; however they lack in water resistance of the hardened resin [2]. Urea-formaldehyde (UF) resins are the most important type of adhesive resins for the production of wood based panels but process-ability and curing behavior of urea formaldehyde resin depended on various factors related to resin properties, types of wood and their properties, amount & type of catalyst, types and amount of polymers addition and environmental conditions [3]. This factor decides the process-ability of UF resin based composite during manufacturing of plywood, particle board and fiberboard. In this review paper, various factors affecting gel time and process-ability of UF resin based wood composite are reviewed.

show abstract

“…In this study, besides using UF resin, a mixture of UF and isocyanate is also used. This is intended to increase strength [5] and reduce thickness swelling [6] because thickness swelling is still a problem on particle boards [7]. In previous studies, much additional substrate used such as porcelain stone which was used to reduce the value of thickness swelling of composite board made of pruning wood [8].…”

Section: Introductionmentioning

confidence: 99%

The possible use of surian tree (Toona sinensis Roem) branches as an alternative raw material in the production of composite boards

et al. 2020

View full text Add to dashboard Cite

The current research focuses on the utilization of branches and twigs of surian as raw material for making composite boards in an effort to utilize the waste part of surian stem wood waste. The types of particle board and oriented strand board were bonded with phenol formaldehyde (PF) of 10% resin content. Variations of board density and board types were focused in this research. The boards were evaluated based on Japanese Industrial Standard (JIS). The results showed that the density of the board affected the physical and mechanical properties of the composite board. Strand boards were better than particle boards with regard to mechanical properties. Physical properties that met the testing standards were moisture content, density, water absorption and thickness swell for both after soaking 2 h in water, while for the mechanical properties test, only modulus of elasticity (MOE) met the standards. However, for further study, it seemed that generally this initial study informed that it was possible to make composite boards from the raw materials, both branches and twigs, with the additional treatment such as changing the size of particles and strands that could improve the properties of the board.

show abstract

Microcrystallinity and colloidal peculiarities of UF/isocyanate hybrid resins

Cited by 13 publications

References 14 publications

Wood Composites and Their Polymer Binders

Wood Composites and Their Polymer Binders

Factor Affecting Gel Time/Process-Ability of Urea Formaldehyde Resin Based Wood Adhesives

The possible use of surian tree (Toona sinensis Roem) branches as an alternative raw material in the production of composite boards

Contact Info

Product

Resources

About