CH272159A - Process for the production of molded articles, in particular insulating panels, with the aid of sulphite cellulose waste liquor. - Google Patents
Process for the production of molded articles, in particular insulating panels, with the aid of sulphite cellulose waste liquor.Info
- Publication number
- CH272159A CH272159A CH272159DA CH272159A CH 272159 A CH272159 A CH 272159A CH 272159D A CH272159D A CH 272159DA CH 272159 A CH272159 A CH 272159A
- Authority
- CH
- Switzerland
- Prior art keywords
- molded articles
- production
- waste liquor
- aid
- products
- Prior art date
Links
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/22—Natural resins, e.g. rosin
- C04B26/24—Cellulosic waste liquor, e.g. sulfite lye
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H8/00—Macromolecular compounds derived from lignocellulosic materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L89/00—Compositions of proteins; Compositions of derivatives thereof
- C08L89/04—Products derived from waste materials, e.g. horn, hoof or hair
- C08L89/06—Products derived from waste materials, e.g. horn, hoof or hair derived from leather or skin, e.g. gelatin
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Dermatology (AREA)
- Biochemistry (AREA)
- Wood Science & Technology (AREA)
- Structural Engineering (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Paper (AREA)
Description
<B>Zusatzpatent</B> zum Hauptpatent Nr. 245077. <B>Verfahren zur Herstellung von Formartikeln,</B> insbesondere <B>Isolierplatten, mit Hilfe</B> von Sulfitzelluloseablauge. Gegenstand des Hauptpatentes ist ein Verfahren zur Herstellung von Formartikeln mit Hilfe von durch Proteine ausgefällter Sulfitzelluloseablauge, das dadurch gekenn zeichnet ist, dass .die Sulfitablauge zusammen mit Proteinstoffen auf Substrate als Binde mittel ausgefällt und das erhaltene Produkt hernach verformt wird.
Die Verformung kann z. B. durch Giessen in Formen unter Wärmebehandlung sowie durch Kalt- oder Heisspressen erfolgen.
Als Substrate wurden zerkleinerte Schäl späne, Steinmehl, Korkmehl, Sägemehl, gege benenfalls unter Zusatz von Zement und Wasserglas, erwähnt.
Während mit diesen Materialien herge stellte Produkte insbesondere ausgezeichnete Hartplatten für Bauzwecke ergeben, wurde ferner gefunden, -dass wesentliche Verbesse rungen der Struktur und Qualität insbeson dere bei der Herstellung von Isolierplatten erzielt werden können, wenn man als Sub strate zellulosehaltiges Fasermaterial, wie Holzschliff; Zellulose oder Altpapier, für sich oder in Mischung miteinander, ver wendet.
Die letztgenannte Verbesserung ist Gegen stand des Zusatzpatentes Nr. 250268.
Es wurde nun gefunden, dass man als Fällungsmittel für die Sulfitablauge an Stelle der im Hauptpatent genannten Pro teinstoffe mit Vorteil Produkte verwenden kann, die erhalten wurden durch sauren<B>Ab-</B> bau von eiweisshaltigen Materialien, die pflanzlichen oder tierischen Ursprungs sein können, bis zur Wasserlöslichkeit.
Geeignete Ausgangsstoffe für die Her stellung der vorerwähnten Abbauprodukte sind Lederabfälle, Sojamehl, Hefe, insbeson dere solche aus der Holzverzuckerung und der Zellstoffindustrie, usw.
Es hat sich überraschenderweise gezeigt, dass diese Abbauprodukte eine wesentliche Qualitätsverbesserung hinsichtlich der Was serbeständigkeit, Härte, Biege- und Zugfe stigkeit der Formartikel bewirken, wenn diese unter Wärmebehandlung und Druck ver formt werden. Zudem haben diese Abbau produkte den Vorteil der ausserordentlichen Billigkeit.
Als Substrate eignen sich alle im Haupt patent. Nr. 245077 sowie im Zusatzpatent Nr. 250268 genannten Materialien. Auch die sonstige Arbeitsweise entspricht den Angaben dieser beiden Patente.
Ein Zusatz von Formaldehyd hat sich in gewissen Fällen als zweckmässig erwiesen. <I>Beispiel:</I> 500 Gewichtsteile Holzschliff werden mit 150 Gewichtsteilen Sulfitablauge von 6 Be , vermischt, wonach man mit Alaun auf den p$ 4,4 bis 4,5 einstellt. Zu dieser Mischung gibt man 150 Gewichtsteile einer 10 o/oigen wässrigen Lösung von durch sauren Abbau von Lederabfällen erhaltenen Produkten, alles unter gutem Rühren.
Die erhaltene Mischung wird vom über stehenden Wasser durch Abtropfenlassen be freit, verformt und unter einem Druck von 50 bis 70 kg/cm=, unter gleichzeitigem Er hitzen auf 170 bis 220 C, nachbehandelt.
<B> Additional patent </B> to main patent no. 245077. <B> Process for the production of molded articles, </B> in particular <B> insulating plates, with the help of </B> sulphite cellulose liquor. The main patent relates to a process for the production of molded articles with the aid of sulfite cellulose liquor precipitated by proteins, which is characterized in that the sulfite waste liquor is precipitated together with protein substances on substrates as a binding agent and the product obtained is then shaped.
The deformation can e.g. B. by casting in molds with heat treatment and by cold or hot pressing.
Comminuted peeling shavings, stone meal, cork meal, sawdust, if necessary with the addition of cement and water glass, were mentioned as substrates.
While with these materials herge presented products in particular give excellent hardboards for building purposes, it was also found that substantial improvements in structure and quality, in particular in the manufacture of insulating panels, can be achieved if cellulosic fiber material such as wood pulp is used as a substrate; Cellulose or waste paper, on its own or in a mixture with one another, is used.
The latter improvement is the subject of additional patent no. 250268.
It has now been found that instead of the protein substances mentioned in the main patent, as precipitating agents for the sulphite waste liquor, it is possible to use advantageously products which have been obtained by acidic degradation of proteinaceous materials of vegetable or animal origin can be, up to water solubility.
Suitable starting materials for the manufacture of the aforementioned degradation products are leather waste, soy flour, yeast, especially those from the saccharification of wood and the pulp industry, etc.
It has surprisingly been found that these degradation products bring about a significant improvement in quality with regard to the water resistance, hardness, bending and tensile strength of the molded articles when they are deformed under heat treatment and pressure. In addition, these mining products have the advantage of being extremely cheap.
All of the substrates in the main patent are suitable as substrates. No. 245077 as well as materials mentioned in the additional patent No. 250268. The other way of working also corresponds to the information in these two patents.
Adding formaldehyde has proven to be useful in certain cases. <I> Example: </I> 500 parts by weight of ground wood are mixed with 150 parts by weight of sulphite waste liquor of 6 Be, after which the p $ 4.4 to 4.5 is adjusted with alum. 150 parts by weight of a 10% aqueous solution of products obtained by acidic degradation of leather waste are added to this mixture, all with thorough stirring.
The mixture obtained is freed from the excess water by allowing it to drip off, shaped and aftertreated under a pressure of 50 to 70 kg / cm =, with simultaneous heating to 170 to 220 ° C.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH620061X | 1946-01-09 | ||
CH272159T | 1949-07-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH272159A true CH272159A (en) | 1950-11-30 |
Family
ID=25731348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH272159D CH272159A (en) | 1946-01-09 | 1949-07-26 | Process for the production of molded articles, in particular insulating panels, with the aid of sulphite cellulose waste liquor. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH272159A (en) |
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1949
- 1949-07-26 CH CH272159D patent/CH272159A/en unknown
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