DE1669142B2 - FORMALDEHYD-BINDING PAINTS BASED ON Aqueous RESIN DISPERSIONS - Google Patents
FORMALDEHYD-BINDING PAINTS BASED ON Aqueous RESIN DISPERSIONSInfo
- Publication number
- DE1669142B2 DE1669142B2 DE19661669142 DE1669142A DE1669142B2 DE 1669142 B2 DE1669142 B2 DE 1669142B2 DE 19661669142 DE19661669142 DE 19661669142 DE 1669142 A DE1669142 A DE 1669142A DE 1669142 B2 DE1669142 B2 DE 1669142B2
- Authority
- DE
- Germany
- Prior art keywords
- formaldehyde
- urea
- binding
- hydrazine
- paints
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Description
30 bis 40 Gewichtsteile Kunstharzdispersion30 to 40 parts by weight synthetic resin dispersion
(50- bis 55%ig)(50 to 55%)
5 Gewichtsteile Harnstoff, pulverisiert
1 Gewichtsteil Netzmittel und Stabilisatoren 5 parts by weight of urea, powdered
1 part by weight of wetting agents and stabilizers
Lo 48 bis 44 Gewichtsteile Pigmente und Füllstoffe
16 bis 10 Gewichtsteile Wasser Lo 48 to 44 parts by weight of pigments and fillers
16 to 10 parts by weight of water
100 Gewichtsteile formaldehydbindende Farbe100 parts by weight of formaldehyde-binding paint
Bemerkung: Als Kunstharzdispersionen kommenNote: Come as synthetic resin dispersions
handelsübliche Produkte auf Basis von Acrylharz-, Polyvinylacetat-, Polyvinylpropionat usw. in Frage, d. h., der chemische Aufbau des Bindemittels ist nicht von ausschlaggebender Bedeutung für die Wirkung des Anstrichmittels. Da Harn-commercial products based on acrylic resin, polyvinyl acetate, polyvinyl propionate, etc. in question, d. That is, the chemical structure of the binder is not of crucial importance for the effect of the paint. Since urinary
stoff sowohl im alkalischen als auch im sauren Bereich mit Formaldehyd reagiert, können ammoniakalisch oder schwach sauer eingestellte Kunstharzdispersionen verwendet werden. Den ammoniakalischen ist aber schon deshalb der VorzugSubstance that reacts with formaldehyde in both the alkaline and acidic range can become ammoniacal or slightly acidic synthetic resin dispersions can be used. The ammoniacal but for that reason alone is the advantage
zu geben, weil der gasförmige Ammoniak ebenfalls mit Formaldehyd reagiert und so die Wirkung des Harnstoffs verstärkt. Ebenso ist es möglich, weitere formaldehydreaktive Chemikalien wie Hydrazinhydrat, Kasein, Dicyandi-because the gaseous ammonia also reacts with formaldehyde and so the effect of urea reinforced. It is also possible to use other formaldehyde-reactive chemicals such as hydrazine hydrate, casein, dicyandi
amid usw. solchen Farben zuzusetzen (s. auch deutsche Patentschrift 1 188 750).amide etc. to be added to such colors (see also German patent specification 1,188,750).
Zur Feststellung der formaldehydbindenden Wirkung wurden folgende Versuche durchgeführt:The following tests were carried out to determine the formaldehyde-binding effect:
Spanplattenstücke in den Abmessungen 150 · 250 · 19 mm wurden mit dem vorher beschriebenen Anstrichmittel
allseitig gestrichen und 24 Stunden bei Raumtemperatur gelagert.
Diese Stücke und ungestrichene Plattenabschnitte derselben Größe wurden in je einen Behälter aus verzinntem
Blech mit etwa 7,51 Inhalt hineingestellt und 10 ecm destilliertes Wasser hinzugegeben. Dann
wurden die Gefäße dicht verschlossen. Sie wurden anschließend in einen Trockenschrank bei +500C
90 Minuten lang erwärmt und nach dem Herausnehmen etwa auf Raumtemperatur abgekühlt. Dann
wurde mittels eines Gasspürgerätes mit dazugehörigen Formaldehyd-Prüfröhrchen mit Hilfe eines durch den
Behälterdeckel eingeführten Gummischlauches der Formaldehydgehalt der in den Behältern befindlichen
Luft gemessen. Er lag bei den ungestrichenen Platten bei etwa 20 mg/m3, während bei den gestrichenen
keine deutliche Formaldehydreaktion mehr festzustellen war, so daß man höchstens von Spuren sprechen
konnte.Chipboard pieces with the dimensions 150 × 250 × 19 mm were painted on all sides with the paint described above and stored for 24 hours at room temperature.
These pieces and unpainted plate sections of the same size were each placed in a container made of tin-plated sheet metal with a capacity of about 7.5 liters and 10 cm of distilled water were added. Then the jars were tightly closed. They were then heated in an oven at +50 0 C for 90 minutes and cooled to about room temperature after removal. Then the formaldehyde content of the air in the containers was measured by means of a gas detector with associated formaldehyde test tubes with the aid of a rubber hose inserted through the container lid. It was about 20 mg / m 3 for the uncoated panels, while no clear formaldehyde reaction could be detected with the coated panels, so that one could only speak of traces.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF0051113 | 1966-12-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE1669142A1 DE1669142A1 (en) | 1971-05-27 |
DE1669142B2 true DE1669142B2 (en) | 1973-06-14 |
Family
ID=7104342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19661669142 Ceased DE1669142B2 (en) | 1966-12-30 | 1966-12-30 | FORMALDEHYD-BINDING PAINTS BASED ON Aqueous RESIN DISPERSIONS |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1669142B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2740207B1 (en) * | 1977-09-07 | 1978-11-09 | Basf Ag | Process for the production of wood-based materials with reduced subsequent release of formaldehyde |
DE2829021C2 (en) * | 1978-07-01 | 1980-08-28 | Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen | Process for reducing the formaldehyde release from chipboard |
AU690303B2 (en) * | 1994-06-28 | 1998-04-23 | Closure Medical Corporation | Ph-modified biocompatible monomer and polymer compositions |
-
1966
- 1966-12-30 DE DE19661669142 patent/DE1669142B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
DE1669142A1 (en) | 1971-05-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
BHV | Refusal |