Abstract:
Dispersion of a vinyl homopolymer or copolymer with a high molecular weight, including at least one modified polyvinyl alcohol with a high degree of hydrolysis (>95%) suitable to formulate non-structural thermoplastic wood adhesives with high water resistance according to EN-204/205, heat resistance according to standard EN-14257 exceeding 7 N/mm 2 , and shelf life exceeding 3 months.
Abstract translation:含有高分子量的乙烯基均聚物或共聚物的分散性,包括至少一种具有高水解度(> 95%)的改性聚乙烯醇,适用于配制具有高耐水性的非结构热塑性木材粘合剂,根据EN-204 / 205,符合EN-14257标准的耐热性超过7 N / mm2,保质期超过3个月。
Abstract:
Disclosed are low-formaldehyde aqueous dispersions of vinyl ester/ethylene, e.g., vinyl acetate/ethylene (VAE), copolymers suitable for use in adhesives for applications such as tobacco or food products wherein only very low levels of formaldehyde are permitted. Such dispersions are prepared by emulsion copolymerization of a monomer mixture comprising a vinyl ester, ethylene, a stabilizing system comprising polyvinyl alcohol preferably having a degree of hydrolysis of at least 97 mole%, and a selected type of free radical redox polymerization initiator system. This selected redox initiator system comprises both a water-insoluble oxidizing agent and a sulfinic acid-based reducing agent. The monomer mixture which is polymerized is substantially free of co-monomers which yield free formaldehyde upon drying or curing of the dispersion and is also substantially free of ethylene oxide-containing emulsifiers. The aqueous dispersions resulting from polymerization of this monomer mixture has a solids content in weight percent and a Brookfield viscosity in millipascal-seconds such that the ratio of solids content to the natural logarithm of viscosity ranges from about 6.34 to about 8.25 wt%/ln(mPa.s). The dispersions herein also have a formaldehyde content of less than about 5.0 ppmw as determined by ISO-15173.
Abstract:
The present invention provides an improved composition of soy with a non-urea diluent at a pH of less than 5.0, having improved viscosity stability with excellent wet and dry strengths, with more efficient production and lower production costs. Optionally, the composition may also include adding a crosslinking agent, additional diluent or both to the soy-non urea diluent adhesive and/or adding an emulsified or dispersed polymer.
Abstract:
Hot-sealable coating systems and method for joining surfaces The present invention relates to a hot-sealable coating system, comprising a polyurethane and/or polyurethane-polyurea polymer (I) and an olefin vinyl acetate copolymer (II). The polyurethane and/or polyurethane-polyurea polymer (I) is obtainable by the reaction of (A) at least one diol and/or polyol component, (B) at least one di-and/or polyisocyanate component, (C) at least one component having sulphonate and/or carboxylate groups, (D) mono-, di-and/or tri-amino- functional and/or hydroxyamino-functional compounds (as appropriate), (E) other isocyanate- reactive compounds (as appropriate). The polyurethane and/or polyurethane-polyurea polymer (I) has a glass transition temperature of ≤ 10 °C and the olefin vinyl acetate copolymer (II) has a minimum film forming temperature (white point temperature) of> + 40°C. The invention also relates to the use of the coating system and a method for joining surfaces in which the coating system according to the invention is used.
Abstract:
A composite article comprises a plurality of lignocellulosic pieces and an adhesive system disposed on the plurality of lignocellulosic pieces for bonding the plurality of lignocellulosic pieces. The adhesive system comprises a binder component and a tackifier component. The tackifier component comprises a cationic polymer. The tackifier component is useful for maintaining orientation of the plurality of lignocellulosic pieces during manufacture of the composite article. The composite article may be various engineered lignocellulosic composites, such as particleboard.
Abstract:
A solidification matrix includes a maleic-containing terpolymer, sodium carbonate, and water. The maleic-containing terpolymer, sodium carbonate, and water interact to form a hydrate solid. The solidification matrix may be used, for example, in a solid detergent composition.
Abstract:
Beschrieben wird die Verwendung synthetischer Klebstoffe für die Herstellung von Wellpappe bei relativ niedrigen Temperaturen und hohen Bahngeschwindigkeiten. Die Wellpappe weist eine gewellte Papierbahn und eine glatte Deckbahn auf und die Wellung der gewellten Papierbahn wird bei Papiertemperaturen unterhalb von 95°C und mit einer Bahngeschwindigkeit von größer 150 m/min erzeugt. Unmittelbar nach Erzeugung der Wellung der gewellten Papierbahn wird in einem kontinuierlichen Prozess ein vorzugsweise nicht erwärmter Wellklebstoff aufgetragen und die gewellte Papierbahn mit mindestens einer ersten Deckbahn verklebt. Als Wellklebstoff wird eine wässrige Klebstoffdispersion auf Basis mindestens eines synthetischen, dispergierten Polymeren mit vorzugsweise mehr als 40 Gew.% Feststoffgehalt eingesetzt, ausgewählt aus Acrylatcopolymeren, Copolymerisaten aus Vinylaromaten und konjugierten aliphatischen Dienen und Vinylacetat/Alkylen Copolymeren, wobei die Glasübergangstemperaturen der Polymere größer 20 °C sind und (vorzugsweise mindestens 5°C) unterhalb der Oberflächentemperatur der gewellten Papierbahn, auf die sie aufgetragen werden, liegen.
Abstract:
The invention relates to an adhesive system comprising - a protein; - a polymer comprising at least one carboxylic group or at least one carboxylic anhydride group, or a combination thereof, with the proviso that said polymer does not contain 5 to 90 wt-% of vinyl pivalate units in combination with 0.2 to 15 wt-% of primary hydroxyl group-containing vinyl compound units, and - a polyamine-epihalohydrin. The invention further relates to the use of the adhesive system, an adhesive composition, a method of producing a wood based product and a wood based product.