Modification impregnation

Impregnation modification of wood is darned as any method that results in the fdling of the wood substance with an inert material (impregnant) in order to bring about a desired petformance change. 

Impregnation modification is an area of research that is relatively unexplored compared to other wood modification methods and there are undoubtedly many other systems that remain to be studied in the future. 

This area is undergoing huge developments at the present time, driven in part by environmental concerns regarding the use of wood treated with certain preservatives. There has been considerable commercial interest shown in wood modification over the past decade, with products based upon thermal modification and furfurylation now being actively marketed. The next few years will see the commercialization of acetylation and impregnation modification. This is a new industry, but one that has enormous potential. 

Use (Rubber) Tires, hose, belting, and packing molded and extruded automotive and industrial products soles and heels hard rubber. (Latex) Adhesives, foamed rubber, textile and rug backing, paper coating and impregnation, modification of plastics to produce high-impact strength, asphalt additive. 

In this chapter no distinction is made between a real chemical modification (acetylation), where covalent bonds between the reagent and the chemical constituents of wood are formed, and the impregnation modification, where monomers diffuse into the wooden cell wall and become polymerized there, like Hill suggested in his definitions (see above), because it was shown that DMDHEU and furfuryl alcohol not only swell the cell wall and polymerize there but also have the potential to form some covalent bonds. ... 

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