Abstract:
The invention relates to an aqueous impregnating resin solution containing (A) between 77.5 and 99.8 wt. %, in relation to the impregnating resin solution, of aqueous condensates based on melamine and formaldehyde; (B) between 0.1 and 20 wt. %, in relation to the impregnating resin solution, of at least one specific quaternary ammonium compound; and (C) between 0.1 and 2.5 wt. %, in relation to the impregnating resin solution, of an aqueous hardener solution. The invention also relates to an aqueous impregnating resin solution consisting of constituents (A) and (B), and to an aqueous hardener mixture consisting of constituents (B) and (C). The invention further relates to an impregnating resin film containing fibrous substances containing cellulose and impregnated with the aqueous impregnating resin solution, and to the use of the aqueous impregnating resin solution, or impregnating resin film, for the antistatic finishing of coated materials.
Abstract:
The invention relates to an aminoplast resin nonwoven film containing a nonwoven that is impregnated with a cross-linkable aminoplastic resin, the nonwoven containing 1 to 100 % by weight of melamine fibers with regard to the total fiber content. The invention also relates to the use of aminoplast resin nonwoven films for 3D coating substrates with a three-dimensionally structured surface. The invention further relates to laminates containing a substrate, optionally a woven or decorative paper and to the aminoplast resin nonwoven film according to the invention.
Abstract:
An aqueous impregnating resin bath based on melamine-formaldehyde resin and hardener, also contains 0.1-20 wt.% of a quaternary ammonium compound containing 9-24C alkyl groups, 9-24C alkoxy groups or OH-terminated alkylene oxide groups with 1-10 oxyalkylene units. An aqueous impregnating resin bath (IRB) comprises: (A) 77.5-99.8 wt.% aqueous condensates based on melamine and formaldehyde; (B) 0.1-20 wt.% of quaternary ammonium compound(s) of formula (R1R2R3R4N+>) X-> (I); and (C) 0.1-2.5 wt.% aqueous hardener solution. R19-24C alkyl or alkoxy, or an alkylene oxide group of formula H(OCmH2m)n-; m : 1-6; n : 1-10; R2as for R1, or benzyl or phenyl; R3, R41-3C alkyl; and X : anion. Independent claims are also included for: (1) aqueous impregnating resin mixtures containing 80-99.9 wt.% (A) and 0.1-20 wt.% (B); (2) aqueous hardener mixtures containing 60-90 wt.% (B) and 10-40 wt.% (C); (3) impregnating resin film (IRF) based on cellulose fibre materials impregnated with IRB; and (4) laminates based on IRF. .
Abstract:
- 15 - O.Z. 0050/42868 An aqueous resin solution for the impregnation of paper webs contains 2-40 parts by weight of a polyurea composed of urea and of a polyamine per 100 parts by weight of a melamine/formaldehyde precondensate. The impregnated paper webs are suitable for coating woodbase materials, especially chipboard.
Abstract:
The invention relates to an aminoplast resin nonwoven film containing a nonwoven that is impregnated with a cross-linkable aminoplastic resin, the nonwoven containing 1 to 100 % by weight of melamine fibers with regard to the total fiber content. The invention also relates to the use of aminoplast resin nonwoven films for 3D coating substrates with a three-dimensionally structured surface. The invention further relates to laminates containing a substrate, optionally a woven or decorative paper and to the aminoplast resin nonwoven film according to the invention.
Abstract:
The invention relates to plates having a decorative surface which are produced by: (i) impregnating a supporting material, e.g. a paper sheet; with a mixture (A) of an aqueous solution or an aqueous dispersion of a thermally hardenable melamine formaldehyde resin (A1) with a radiation-hardenable acrylate resin (A2), e.g. a urethane polyester and/or polyether acrylate, which can be diluted with water and/or which can be dispersed in water; (ii) coating the dried impregnated supporting material with a covering lacquer consisting of a mixture (B) that contains a radiation-hardenable acrylate resin (B1), e.g. a urethane acrylate as well as a thermally hardenable etherified melamine formaldehyde resin (B2), and; (iii) radiation-hardening and successively compacting the supporting material that is impregnated and provided with a covering lacquer. During processing, the employed coating system exhibits, in addition to good pot lives, a particularly good adhesiveness between the covering lacquer layers and the impregnated supporting materials.
Abstract:
Melamine resin mixture for impregnating laminating papers comprising a melamine-formaldehyde resin, a sulfite or hydroxymethanesulfonate, and optionally an elastifying agent. Melamine resin mixture comprising: (a) a melamine resin made from (a1) melamine (component a1) and (b1) per mol. melamine, 1.45-1.90 mol. formaldehyde (component b1), with a clouding temperature of 10-30 deg C (component a); (b) per mol. melamine in the melamine resin (a), 0.2-0.4 mol of a sulfur compound selected from sulfite and hydroxymethanesulfonate (component b); and (c) optionally, per mol. melamine in melamine resin (a), 0.01-0.3 mol. of an elastifying agent (component c).