Wood substrate furnished with a flame retardant
The invention relates to a wood substrate rendered flame-retardant. The invention provides that on the substrate there is a coating and/or impregnation system with a flame retardant selected from the group consisting of room-temperature-liquid organic halogen compounds and organic phosphorus compounds and organic boron compounds, and that there is also a layer of coating material applied thereto.
1. A process for the production of a flame-retardant wood substrate, wherein the process comprises the following steps:
a) application of a flame retardant selected from the group consisting of room-temperature-liquid organic halogen compounds and organic phosphorus compounds and organic boron compounds to the substrate surface;
b) application of the layer of coating material to the substrate surface equipped with flame retardant.
2. The process as claimed in claim 1 , wherein the flame retardant is applied by a process selected from the group consisting of spray-application, unpressurized immersion, pressure-impregnation, and other methods of application.
3. The process as claimed in claim 1 , wherein, before the application of the flame retardant, the substrate surface is devolatilized under reduced pressure.
4. The process as claimed in in claim 1 , wherein, after the application of the flame retardant, the substrate surface is air-dried.
5. The process as claimed in claim 1 , wherein the unpressurized immersion or the pressure-impregnation is carried out for a period of from 1.5 to 96 h.
6. The process as claimed in claim 1 , wherein the flame retardant is one selected from the group consisting of phosphoric esters, phosphonic esters, phosphinic esters, and boric esters.
7. The process as claimed in claim 6 , wherein the flame retardant is an alkyl ester.
8. The process as claimed in claim 7 , wherein the flame retardant is one selected from the group consisting of triethyl phosphate, dimethyl propane phosphate and triisopropyl borate.
9. The process as claimed in claim 1 , wherein the layer of coating material is a clearcoat layer.
10. The process as claimed in claim 1 , wherein the layer of coating material comprises coatings selected from the group consisting of polyurethane coatings, thioisocyanate coatings, polyester coatings, poly(meth)acrylate coatings, and epoxy coatings.