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    • 4. 发明申请
    • Aqueous silica-containing composition
    • 含水二氧化硅的组合物
    • US20030136534A1
    • 2003-07-24
    • US10326320
    • 2002-12-20
    • Hans Johansson-VestinJohan NyanderJan Nordin
    • D21H017/00D21H017/28D21H017/44D21H017/55D21H017/68C08L097/00C09D197/00
    • D21H21/10D21H17/23D21H17/29D21H17/375D21H17/455D21H17/57D21H17/68D21H17/74
    • The present invention relates to an aqueous silica-containing composition comprising an anionic organic polymer having at least one aromatic group and anionic aggregated or microgel formed silica-based particles. The aqueous silica-containing composition contains the anionic organic polymer having at least one aromatic group and the anionic silica-based particles in an amount of at least 0.01% by weight of the total weight of the aqueous silica-containing composition. The aqueous silica-containing composition contains substantially no cellulose-reactive sizing agent and the anionic organic polymer having at least one aromatic group is not an anionic naphthalene sulphonate formaldehyde condensate. The invention further relates to methods for the preparation of the aqueous silica-containing composition and the use of the aqueous silica-containing composition as a drainage and retention aid in a process for the production of paper. The invention also relates to a process for the production of paper from an aqueous silica-containing composition and at least one charged organic polymer are added to the cellulosic suspension.
    • 本发明涉及包含具有至少一个芳族基团的阴离子有机聚合物和阴离子聚集或微凝胶形成的二氧化硅基颗粒的含水二氧化硅的组合物。 含水二氧化硅的组合物含有至少一种芳族基团的阴离子有机聚合物和阴离子二氧化硅基颗粒,其量为含二氧化硅含水组合物总重量的至少0.01重量%。 含水二氧化硅的组合物基本上不含纤维素反应性施胶剂,并且具有至少一个芳族基团的阴离子有机聚合物不是阴离子萘磺酸盐甲醛缩合物。 本发明还涉及制备含水二氧化硅的组合物的方法以及含水二氧化硅的组合物作为生产纸的方法中的排水和助留剂的用途。 本发明还涉及从含水二氧化硅的组合物生产纸的方法,并且将至少一种带电有机聚合物加入到纤维素悬浮液中。
    • 6. 发明申请
    • Resin material and method of producing same
    • 树脂材料及其制造方法
    • US20020065400A1
    • 2002-05-30
    • US09826172
    • 2001-04-04
    • Mikhail RaskinLazar O. IoffeAzariy Z. PukisMartin H. Wolf
    • C07G001/00C08L097/00
    • C08H6/00C07G1/00C08G8/28C08G8/34C08G16/0293C08L61/14C08L61/24C08L97/02C08L2666/16
    • The present invention relates to a new process for modification of lignins, particularly from sulfite waste liquor, and preparation of lignin phenol-formaldehyde resin, i.e. thermosetting resins for which some or all of the phenol is replaced by the modified lignin. The lignin is modified in two steps. In the first step, a graft-copolymerization is performed with different kinds of unsaturated monomers containing carbonyl groups, and in particularly aldehyde groups, and also amido, carbonylic, carboxylic, nitrilic, hydroxylic, acetic, amino, and other functional groups. In the second step, the graft-copolymer is treated with formaldehyde, phenol, phenol-formaldehyde, or a mixture thereof, at elevated temperatures. The obtained modified lignin product is used to produce lignin phenol-formaldehyde resins. These resins can be used as binders in oriented strand board (OSB), particleboard, plywood, and other wood composite products and in industrial resins for electronics, automobiles, appliances, metal castings, abrasives, insulation, refractories and other applications.
    • 本发明涉及一种用于改性木质素,特别是亚硫酸盐废液的新方法,以及木质素酚醛树脂的制备,即一些或全部苯酚被改性木质素替代的热固性树脂。 木质素在两个步骤中被修饰。 在第一步中,使用不同种类的含有羰基的不饱和单体,特别是醛基以及酰胺基,羰基,羧酸,硝基,羟基,乙酸,氨基和其它官能团进行接枝共聚。 在第二步中,接枝共聚物在升高的温度下用甲醛,苯酚,苯酚 - 甲醛或其混合物处理。 所得改性木质素产物用于生产木质素酚醛树脂。 这些树脂可用作定向刨花板(OSB),刨花板,胶合板和其他木材复合材料以及电子,汽车,电器,金属铸件,磨料,绝缘材料,耐火材料和其他应用的工业树脂中的粘合剂。