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DE746812C - Process for the production of coatings on thermoplastics - Google Patents

Process for the production of coatings on thermoplastics

Info

Publication number
DE746812C
DE746812C DEH168315D DEH0168315D DE746812C DE 746812 C DE746812 C DE 746812C DE H168315 D DEH168315 D DE H168315D DE H0168315 D DEH0168315 D DE H0168315D DE 746812 C DE746812 C DE 746812C
Authority
DE
Germany
Prior art keywords
coatings
production
thermoplastics
und
weight
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.)
Expired
Application number
DEH168315D
Other languages
German (de)
Inventor
Rudolf Gruender
Dr Guenter Hoffmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kurt Herbert & Co Vormals Otto
Axalta Coating Systems Germany GmbH and Co KG
Original Assignee
Kurt Herbert & Co Vormals Otto
Dr Kurt Herberts and Co GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kurt Herbert & Co Vormals Otto, Dr Kurt Herberts and Co GmbH filed Critical Kurt Herbert & Co Vormals Otto
Priority to DEH168315D priority Critical patent/DE746812C/en
Application granted granted Critical
Publication of DE746812C publication Critical patent/DE746812C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C08J2333/12—Homopolymers or copolymers of methyl methacrylate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2461/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)

Description

Verfahren zur Herstellung von Überzügen auf thermoplastischen Kunststoffen Es bereitete bisher außerordentliche Schwierigkeiten, Formlinge, insbesondere Scheiben, aus Polymethacrylsäureestern mit Überzügen durch Aufbringen von Lacken o.,dgl. zu versehen, weil entweder die Formlinge durch den Lack =gequollen werden oder sogar der Lack in idie Oberfläche des Formlings hineindiffundiert.Process for the production of coatings on thermoplastics So far it has caused extraordinary difficulties, moldings, especially slices, from polymethacrylic acid esters with coatings by applying varnishes o., the like. to provided, because either the moldings are swollen by the paint = or even the lacquer diffuses into the surface of the molding.

Nach vielen praktisch mißlungenen Versuchen wurde nun gefunden, @daß man überraschenderweise zu einwandfreien Überzügen gelangt, wenn man auf Polymethacrylsäureestern, insbesondere solchen@mit niederen Alkoholen" wie Methanol, Lösungen. von bei mäßiger Temperatur härtbaren Aminokunstharzen aufbringt, die an sich mit den thermoplastischen Kunststoffen völlig unverträglich 'sind.After many practically unsuccessful attempts it has now been found that surprisingly, perfect coatings are obtained if one uses polymethacrylic acid esters, especially those with lower alcohols such as methanol, solutions of moderate Temperature-curable amino resins applied to themselves with the thermoplastic Plastics are completely incompatible '.

Die Härtung des Überzuges geschieht durch bekannte; insbesondere saure oder säurebildende Katalysatoren .bei Temperaturen, die unterhalb des Erweichungspunktes des betreffenden thermoplastischen Formlings liegen.The coating is hardened by known methods; especially acidic or acid-forming catalysts at temperatures below the softening point of the thermoplastic molding in question.

Als Aminokunstharze kommen Harnstoff-und bz-w. oder Thioharnstoffharze, ferner Melamin- und Carbaminsäureharze in Betracht. Die reit den Aminokunstharzlacken erhaltenen Überzüge sind durchsichtig. Man kann indessen den Lacken auch Trübungsstoffe (Pigmente) oder Schutzstoffe gegen ultraviolette Strahlen zusetzen, z. B. gelbe Farbstoffe zum Schutz gegen die blauen Strahlen des Sonnenlichtes u. dgl.,oderTitandioxydpigmente zur Reflexion infraroter Strahlen.The amino synthetic resins are urea and or. or thiourea resins, melamine and carbamic acid resins are also possible. She rides the amino synthetic resin paints The coatings obtained are transparent. However, opacifying substances can also be added to the paints (Pigments) or add protective substances against ultraviolet rays, e.g. B. yellow Dyes for protection against the blue rays of sunlight and the like, or titanium dioxide pigments for reflection of infrared rays.

Als Löser für die Ü berzugsmasse sind am besten Lösungsmittel bzw. Lös.ungsrnitteIgemische geeignet, die vorzugsweise aus stark flüchtigen Lösungsmitteln bestehen, die eine mäßig lösende Wirkung auf den thermoplastischen .Kunststoff besitzen. Es ist beispielsweise vorteilhaft, wenn mindestens 70°1o der angewendeten Lösun.gsmittelbestandteile eine Flüchtigkeit (Verdunstungszeit) unter 5 besitzen (bezogen auf Äthyläther = 1). Andere flüchtige Lösungsmittel, die nach der vorliegenden .Erfindung vorteilhaft verwendet werden können, sind: Essigsäuremethylester, Essigsäureäthvlester, 3#-lethylalk ohol, Leichtbenzin. Solange sich Lösungsmittel auf denn Formling befinden, ist es zu vermeiden, diese unter Spannung zu setzen, z. B. durch Eäx schrauben mechanisch zu beanspruchen.The best solvents for the coating compound are solvents or Solution mixtures are suitable, preferably made from highly volatile solvents exist, which have a moderately dissolving effect on the thermoplastic .Kunststoff. It is advantageous, for example, if at least 70 ° 10 of the solvent constituents used one Have volatility (evaporation time) below 5 (based on Ethyl ether = 1). Other volatile solvents that can be used in accordance with the present invention can be used advantageously are: methyl acetate, ethyl acetate, 3 # -lethyl alcohol, light gasoline. As long as there are solvents on the molding, it is to be avoided to put this under tension, e.g. B. screw mechanically by Eäx to claim.

Die erfindungsgemäßen Überzüge eignen sich sowohl als Decklacke als auch als Grundlacke für weitere Überzüge. Man kann beliebige, auch nichthärtbare Lackstoffe auf den Grundlack auftragen. Beispiel Eine Platte aus Polymethacrylsäureester wird mit einem Lack folgender Zusammensetzung überzogen: 5p Gewichtsteile härtbares Harnstofifharz, 5o Gewichtsteile Butylalkohol, ;o Gewichtsteile Essigsäureäthylester, 5 Gewichtsteile Methylglykol, 5 Gewichtsteile Waaser, 2,5 Gewichtsteile Äthylalkohol, 2,5 Gewichtsteile Ammoniumnitrat. Die Lackschicht wird 30 Minuten bei 5o` getrockilet.The coatings according to the invention are suitable both as top coats and as base coats for further coatings. You can apply any varnish, even non-curable, to the base coat. Example A plate made of polymethacrylic acid ester is coated with a varnish of the following composition: 5 parts by weight of curable urea resin, 50 parts by weight of butyl alcohol, o parts by weight of ethyl acetate, 5 parts by weight of methyl glycol, 5 parts by weight of Waaser, 2.5 parts by weight of ethyl alcohol, 2.5 parts by weight of ammonium nitrate. The lacquer layer is dried for 30 minutes at 50 '.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Schutz überzügen auf Scheiben aus Polymethacrylsäureestern, dadurch gekennzeichnet, daß als Überzugsmasse härtbare Aminokunstharzlacke verwendet werden, insbesondere solche, welche leicht flüchtige Lösungsmittel, wie z. B. Essigester, enthalten. Zur Abgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Stock, Taschenbuch für die Farben- und Lackindustrie, 194o, S. 2i9; Fette und Seifen, 1941, S. 129; deutsche Patentschriften . . . . N r. 600 391, 6o4456. PATENT CLAIM: A process for the production of protective coatings on panes of polymethacrylic acid esters, characterized in that curable amino synthetic resin lacquers are used as the coating material, in particular those which contain highly volatile solvents such as e.g. B. ethyl acetate included. To distinguish the subject of the application from the state of the art, the following publications were considered in the granting procedure: Stock, Taschenbuch für die Farben- und Lackindustrie, 194o, p. 2i9; Fette und Seifen, 1941, p. 129; German patents. . . . No. 600 391, 6o4456.
DEH168315D 1942-05-09 1942-05-09 Process for the production of coatings on thermoplastics Expired DE746812C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEH168315D DE746812C (en) 1942-05-09 1942-05-09 Process for the production of coatings on thermoplastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEH168315D DE746812C (en) 1942-05-09 1942-05-09 Process for the production of coatings on thermoplastics

Publications (1)

Publication Number Publication Date
DE746812C true DE746812C (en) 1944-08-25

Family

ID=7184305

Family Applications (1)

Application Number Title Priority Date Filing Date
DEH168315D Expired DE746812C (en) 1942-05-09 1942-05-09 Process for the production of coatings on thermoplastics

Country Status (1)

Country Link
DE (1) DE746812C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600391C (en) * 1930-03-30 1934-07-21 I G Farbenindustrie Akt Ges Process for the production of hardenable paint coatings
DE604456C (en) * 1932-07-03 1934-10-20 I G Farbenindustrie Akt Ges Process for reducing the electrical excitability of foils and similar artificial structures

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE600391C (en) * 1930-03-30 1934-07-21 I G Farbenindustrie Akt Ges Process for the production of hardenable paint coatings
DE604456C (en) * 1932-07-03 1934-10-20 I G Farbenindustrie Akt Ges Process for reducing the electrical excitability of foils and similar artificial structures

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