申请人:BASF SE
公开号:US10399246B2
公开(公告)日:2019-09-03
The present invention relates to a batchwise or continuous process for producing single-layer one multilayer lignocellulosic materials, comprising the process steps of
(I) mixing the components of the individual layers,
(II) scattering the mixture(s) produced in process step (I) to give a mat,
(III) optionally precompacting the scattered mat and
(IV) hot-pressing the optionally precompacted mat,
by using, in process step (I), for the core of multilayer lignocellulosic materials or for single-layer lignocellulosic materials, a mixture (component A) comprising
a1) 50% to 99% by weight, preferably 70% to 97% by weight, more preferably 80% to 95% by weight and especially 85% to 92% by weight of organic isocyanate having at least two isocyanate groups or mixtures thereof and
a2) 1% to 50% by weight, preferably 3% to 30% by weight, more preferably 5% to 20% by weight and especially 8% to 15% by weight of organic carboxylic acid, carboxylic anhydride, carbonyl chloride or mixtures thereof and
a3) 0% to 49% by weight, preferably 0% to 10% by weight and more preferably 0% to 5% by weight of auxiliaries or mixtures thereof.
本发明涉及一种分批或连续生产单层或多层木质纤维素材料的工艺,包括以下工艺步骤
(I) 混合各层的成分、
(II) 将步骤(I)中产生的混合物分散,得到垫层、
(III) 有选择地预先压实分散的垫层,以及
(IV) 热压经选择预压实的垫层、
在工艺步骤(I)中,对于多层木质纤维素材料的芯材或单层木质纤维素材料的芯材,使用一种混合物(组分 A),该混合物包括
a1) 50%至 99%(按重量计),优选 70%至 97%(按重量计),更优选 80%至 95%(按重量计),特别是 85%至 92%(按重量计)的具有至少两个异氰酸酯基团的有机异氰酸酯或其混合物,以及
a2) 有机羧酸、羧酸酐、羰酰氯或其混合物的重量百分比为 1%至 50%,优选 3%至 30%,更优选 5%至 20%,特别是 8%至 15%;以及
a3) 0%至 49%(按重量计),优选 0%至 10%(按重量计),更优选 0%至 5%(按重量计)的助剂或其混合物。