ES2288426A1 - Pretreatment method for piece or surface of plastic material, involves opening of pores of three dimensional substrate of material, in individual pieces or surfaces - Google Patents

Pretreatment method for piece or surface of plastic material, involves opening of pores of three dimensional substrate of material, in individual pieces or surfaces Download PDF

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Publication number
ES2288426A1
ES2288426A1 ES200601709A ES200601709A ES2288426A1 ES 2288426 A1 ES2288426 A1 ES 2288426A1 ES 200601709 A ES200601709 A ES 200601709A ES 200601709 A ES200601709 A ES 200601709A ES 2288426 A1 ES2288426 A1 ES 2288426A1
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Prior art keywords
piece
pretreatment process
process according
temperature
weight
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ES2288426B1 (en
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Albert Sanahuja Julibert
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
    • B05D3/101—Pretreatment of polymeric substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • 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
    • C08J7/12—Chemical modification
    • C08J7/14—Chemical modification with acids, their salts or anhydrides

Abstract

The method involves opening of pores of the three-dimensional substrate of the material, in individual pieces or surfaces. The surface of the painting having decorative purpose is treated.

Description

Procedimiento de pretratamiento para una pieza o superficie de material plástico, en particular de polióxido de metileno.Pretreatment procedure for a piece or surface of plastic material, in particular of polyoxide methylene

Objeto de la invenciónObject of the invention

La presente solicitud de Patente de Invención tiene por objeto el registro de un procedimiento de pretratamiento para una pieza o superficie de material plástico, en particular de polióxido de metileno que incorpora notables innovaciones.The present invention patent application Its purpose is to register a pretreatment procedure for a piece or surface of plastic material, in particular of methylene polyoxide that incorporates notable innovations.

Más concretamente, hace referencia a un procedimiento para el pretratamiento de una pieza o una superficie hecha de polióxido de metileno para la posterior aplicación de un tratamiento de pintado, lacado, metalizado, cromado, anodizado.More specifically, it refers to a procedure for pretreatment of a part or a surface made of methylene polyoxide for the subsequent application of a painted, lacquered, metallized, chromed, anodized treatment.

Antecedentes de la invenciónBackground of the invention

Hoy en día, muchas piezas aplicables a una amplia variedad de campos tecnológicos son fabricadas con materiales plásticos, las cuales requieren posteriormente un tratamiento de pintado, lacado, metalizado, cromado o anodizado con el fin de obtener un acabado superficial adecuado a la aplicación final de dicha pieza resultante.Today, many pieces applicable to one wide variety of technological fields are manufactured with plastic materials, which subsequently require a Painted, lacquered, metallized, chromed or anodized treatment with in order to obtain a surface finish suitable for the application end of said resulting piece.

No obstante, no todos los materiales plásticos pueden garantizar un acabado superficial determinado con la calidad deseada debido a su estructura molecular. Un ejemplo de lo anteriormente dicho se encuentra en la fabricación de piezas hechas de polióxido de metileno (POM) las cuales presentan una buena resistencia mecánica. Sin embargo, debido a sus características moleculares, no presenta una buena adherencia a la aplicación de recubrimientos superficiales, de tal modo que resulta relativamente fácil que una vez aplicado un proceso, por ejemplo de pintado o metalizado, al cabo de un periodo de tiempo relativamente pequeño con respecto a la vida útil de la pieza sobre la cual se aplica el revestimiento, dicho pintado se despegue de la pieza.However, not all plastic materials they can guarantee a certain surface finish with quality desired due to its molecular structure. An example of what said above is in the manufacture of made parts of methylene polyoxide (POM) which have a good mechanical strength. However, due to its characteristics molecular, does not present a good adherence to the application of surface coatings, so that it is relatively easy that once applied a process, for example of painting or metallized, after a relatively small period of time with respect to the useful life of the piece on which the coating, said painted will peel off the piece.

Descripción de la invenciónDescription of the invention

La presente invención se ha desarrollado con el fin de proporcionar un procedimiento de pretratamiento que resuelva los inconvenientes anteriormente mencionados, aportando, además, otras ventajas adicionales que serán evidentes a partir de la descripción que se acompaña a continuación.The present invention has been developed with the in order to provide a pretreatment procedure that resolves the aforementioned drawbacks, also providing other additional advantages that will be apparent from the Description attached below.

Es objeto de la invención proporcionar un procedimiento novedoso destinado al pretratamiento para una pieza o superficie de material plástico, en particular de polióxido de metileno, caracterizado por el hecho de que comprende las etapas de: estabilización térmica de la pieza en una temperatura comprendida entre 25ºC y 30ºC; aplicación de una composición de recubrimiento sobre la superficie de la pieza, siendo dicha composición consistente en alcohol isopropílico, acetato butilglicol, ácido fosfórico y aditivos extensores; un primer secado de la pieza a una temperatura comprendida entre 50ºC y 70ºC; y un segundo secado de la pieza a una temperatura comprendida entre 140ºC y 150ºC, siendo el tiempo de este segundo secado superior al primer secado. De esta manera, la invención satisface la necesidad de obtener un procedimiento para la aplicación posterior de tratamientos superficiales, tales como pintura con fines decorativos, con pocos pasos y de una forma relativamente sencilla y rápida, de modo que incrementa el poder de penetración al realizar una abertura de los poros del sustrato tridimensional del material.It is the object of the invention to provide a novel procedure for pretreatment for a piece or surface of plastic material, in particular of polyoxide methylene, characterized by the fact that it comprises the steps of:  thermal stabilization of the piece at a temperature included between 25 ° C and 30 ° C; application of a coating composition on the surface of the piece, said composition being consisting of isopropyl alcohol, butyl glycol acetate, acid phosphoric and extender additives; a first drying of the piece to a temperature between 50 ° C and 70 ° C; and a second drying of the piece at a temperature between 140ºC and 150ºC, being The time of this second drying exceeds the first drying. This way, the invention satisfies the need to obtain a procedure for the subsequent application of treatments surface, such as decorative painting, with few steps and in a relatively simple and fast way, so that increases the penetration power when making an opening of the pores of the three-dimensional substrate of the material.

De forma preferente, la composición de recubrimiento se aplica en estado líquido a una temperatura comprendida entre 20ºC y 30ºC, más concretamente a 25ºC.Preferably, the composition of coating is applied in a liquid state at a temperature between 20ºC and 30ºC, more specifically at 25ºC.

El espesor de la capa de la composición de recubrimiento es de 10 a 20 \mum.The thickness of the composition layer of coating is 10 to 20 µm.

Preferentemente, el alcohol isopropilico está presente en un rango comprendido entre 44-48% en peso, por otro lado, el acetato butilglicol se halla en un rango comprendido entre 44-48% en peso y el ácido fosfórico está presente en un rango comprendido entre 4-6% en peso.Preferably, the isopropyl alcohol is present in a range between 44-48% in weight, on the other hand, butyl glycol acetate is in a range between 44-48% by weight and acid phosphoric is present in a range between 4-6% by weight.

Según otro aspecto de la invención, los aditivos extensores consisten en una disolución de polímero fluorado.According to another aspect of the invention, the additives extenders consist of a fluorinated polymer solution.

La composición de recubrimiento se aplica mediante una pistola aerográfica con atomización a una presión comprendida entre 2-10 bares.The coating composition is applied using a spray gun with pressure atomization between 2-10 bars.

Otras características y ventajas del procedimiento de pretratamiento de una pieza o superficie de material plástico, en particular de polióxido de metileno objeto de la presente invención resultarán evidentes a partir de la descripción de una realización preferida, pero no exclusiva, que se ilustra a modo de ejemplo no limitativo en los dibujos que se acompañan, en los cuales:Other features and advantages of pretreatment procedure of a part or surface of plastic material, in particular methylene polyoxide subject to the present invention will be apparent from the description of a preferred, but not exclusive, embodiment illustrates by way of non-limiting example in the drawings that are accompany, in which:

Breve descripción de los dibujosBrief description of the drawings

Figura 1.- Es un diagrama en bloques del procedimiento de pretratamiento de piezas o superficies de POM de acuerdo con las características descritas en la primera reivindicación.Figure 1.- It is a block diagram of the pretreatment procedure for POM parts or surfaces of according to the characteristics described in the first claim.

Descripción de una realización preferenteDescription of a preferred embodiment

Tal como se muestra en la figura 1, el procedimiento de pretratamiento de una pieza o superficie de material plástico, en particular de polióxido de metileno (POM), como por ejemplo un tapón para envases de cosmética, pulsadores para diferentes aplicaciones, componentes de un automóvil, resulta particularmente apropiado para la posterior realización de un proceso de pintado o metalizado. Dicho procedimiento comprende las siguientes etapas:As shown in Figure 1, the pretreatment procedure of a part or surface of plastic material, in particular methylene polyoxide (POM), such as a cap for cosmetic containers, push buttons for different applications, components of a car, it turns out particularly suitable for the subsequent realization of a painted or metallized process. Said procedure comprises the following stages:

En primer lugar, se realiza una estabilización térmica (1) de la pieza en una temperatura comprendida entre 25 y 30ºC; a continuación se aplica una composición de recubrimiento (2) sobre la superficie de la pieza con un espesor de aproximadamente 15 \mum, siendo dicha composición consistente en alcohol isopropílico, acetato butilglicol, ácido fosfórico y aditivos extensores; un primer secado (3) de la pieza a una temperatura comprendida entre 50 y 70ºC durante 3 minutos en un horno de secado convencional; y finalmente se lleva a cabo un segundo secado (4) de la pieza a una temperatura comprendida entre 140 y 150ºC durante un periodo de tiempo de entre 18 a 20 minutos también en un horno de secado convencional. Una vez realizados todos los pasos descritos anteriormente se deja enfriar al aire a temperatura
ambiente.First, a thermal stabilization (1) of the piece is carried out at a temperature between 25 and 30 ° C; a coating composition (2) is then applied on the surface of the piece with a thickness of approximately 15 µm, said composition consisting of isopropyl alcohol, butyl glycol, phosphoric acid and extender additives; a first drying (3) of the piece at a temperature between 50 and 70 ° C for 3 minutes in a conventional drying oven; and finally a second drying (4) of the piece is carried out at a temperature between 140 and 150 ° C for a period of time between 18 to 20 minutes also in a conventional drying oven. Once all the steps described above are allowed to cool to air at temperature
ambient.

Con respecto a la composición de recubrimiento, en una realización particular se realiza en un estado líquido mediante una pistola aerográfica con atomización de tipo convencional a una presión de 4 bares aproximadamente y en la cual se encuentra a una temperatura comprendida entre 20 y 30ºC.With respect to the coating composition, in a particular embodiment it is performed in a liquid state by an air spray gun with type atomization conventional at a pressure of approximately 4 bars and in which It is at a temperature between 20 and 30 ° C.

El alcohol isopropílico está presente en un rango comprendido entre 44-48% en peso, mientras que el acetato butilglicol está presente en un rango comprendido entre 44-48% en peso y estando el ácido fosfórico presente en un rango comprendido entre 4-6% en peso.Isopropyl alcohol is present in a range between 44-48% by weight, while that butylglycol acetate is present in a range between 44-48% by weight and phosphoric acid being present in a range between 4-6% in weight.

Preferentemente, los aditivos extensores consisten en una disolución de polímero fluorado y están presentes en un rango comprendido entre 1-2,5 en peso.Preferably, the extender additives they consist of a fluorinated polymer solution and are present in a range between 1-2.5 by weight.

Los detalles, las formas, las dimensiones y demás elementos accesorios, así como los materiales empleados en la fabricación del procedimiento de pretratamiento de la invención podrán ser convenientemente sustituidos por otros que sean técnicamente equivalentes y no se aparten de la esencialidad de la invención ni del ámbito definido por las reivindicaciones que se incluyen a continuación.The details, the shapes, the dimensions and other accessory elements, as well as the materials used in the manufacture of the pretreatment process of the invention may be conveniently substituted by others that are technically equivalent and do not depart from the essentiality of the invention or of the scope defined by the claims to be include below.

Claims (9)

1. Procedimiento de pretratamiento para una pieza o superficie de material plástico, en particular de polióxido de metileno, caracterizado por el hecho de que comprende las siguientes etapas:1. Pretreatment process for a piece or surface of plastic material, in particular methylene polyoxide, characterized by the fact that it comprises the following steps:
a)to)
estabilización térmica de la pieza en una temperatura comprendida entre 25 y 30ºC;thermal stabilization of the piece in a temperature between 25 and 30 ° C;
b)b)
aplicación de una composición de recubrimiento sobre la superficie de la pieza, siendo dicha composición consistente en alcohol isopropílico, acetato butilglicol, ácido fosfórico y aditivos extensores;application of a composition of coating on the surface of the piece, said being composition consisting of isopropyl alcohol, acetate butyl glycol, phosphoric acid and extender additives;
c)C)
un primer secado de la pieza a una temperatura comprendida entre 50 y 70ºC;a first drying of the piece at a temperature between 50 and 70 ° C;
d)d)
y un segundo secado de la pieza a una temperatura comprendida entre 140 y 150ºC, siendo el tiempo de este segundo secado superior al primer secado.and a second drying of the piece at a temperature between 140 and 150 ° C, the time of this second drying being greater than the first dried
2. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que la composición de recubrimiento se aplica en estado líquido a una temperatura comprendida entre 20 y 30ºC, más concretamente a 25ºC.2. Pretreatment process according to claim 1, characterized in that the coating composition is applied in a liquid state at a temperature between 20 and 30 ° C, more specifically at 25 ° C. 3. Procedimiento de pretratamiento según cualquiera de las reivindicaciones anteriores, caracterizado por el hecho de que el espesor de la capa de la composición de recubrimiento es de 10 a 20 \mum.3. Pretreatment method according to any of the preceding claims, characterized in that the thickness of the coating composition layer is 10 to 20 µm. 4. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que el alcohol isopropílico está presente en un rango comprendido entre 44-48% en peso.4. Pretreatment process according to claim 1, characterized in that the isopropyl alcohol is present in a range between 44-48% by weight. 5. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que el acetato butilglicol está presente en un rango comprendido entre 44-48% en peso.5. Pretreatment process according to claim 1, characterized in that the butyl glycol acetate is present in a range between 44-48% by weight. 6. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que el ácido fosfórico está presente en un rango comprendido entre 4-6% en peso.6. Pretreatment process according to claim 1, characterized in that the phosphoric acid is present in a range between 4-6% by weight. 7. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que los aditivos extensores consisten en una disolución de polímero fluorado.7. Pretreatment process according to claim 1, characterized in that the extender additives consist of a fluorinated polymer solution. 8. Procedimiento de pretratamiento según la reivindicación 1, caracterizado por el hecho de que los aditivos extensores están presentes en un rango comprendido entre 1-2,5 en peso.8. Pretreatment process according to claim 1, characterized in that the extender additives are present in a range between 1-2.5 by weight. 9. Procedimiento de pretratamiento según cualquiera de las reivindicaciones anteriores, caracterizado por el hecho de que composición de recubrimiento se aplica mediante una pistola aerográfica con atomización a una presión comprendida entre 2-10
bares.9. Pretreatment method according to any of the preceding claims, characterized in that the coating composition is applied by means of an atomized spray gun at a pressure between 2-10
pubs.
ES200601709A 2006-06-26 2006-06-26 PRE-TREATMENT PROCEDURE FOR A PART OR SURFACE OF PLASTIC MATERIAL, IN PARTICULAR OF METHYLENE POLYOXIDE. Expired - Fee Related ES2288426B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES200601709A ES2288426B1 (en) 2006-06-26 2006-06-26 PRE-TREATMENT PROCEDURE FOR A PART OR SURFACE OF PLASTIC MATERIAL, IN PARTICULAR OF METHYLENE POLYOXIDE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES200601709A ES2288426B1 (en) 2006-06-26 2006-06-26 PRE-TREATMENT PROCEDURE FOR A PART OR SURFACE OF PLASTIC MATERIAL, IN PARTICULAR OF METHYLENE POLYOXIDE.

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ES2288426A1 true ES2288426A1 (en) 2008-01-01
ES2288426B1 ES2288426B1 (en) 2008-12-16

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235426A (en) * 1961-08-01 1966-02-15 Du Pont Method of rendering thermoplastic resins receptive to coatings
GB2091274A (en) * 1980-12-05 1982-07-28 Polyplastics Co A process for the treatment of polyacetal articles
US4418162A (en) * 1980-04-30 1983-11-29 Polyplastics Co., Ltd. Process for treating the surface of polyacetal resin
EP0259011A2 (en) * 1986-08-06 1988-03-09 Polyplastics Co. Ltd. Method of surface treating a moulded polyacetal resin product
ES2079192T3 (en) * 1991-06-22 1996-01-01 Basf Ag PROCEDURE FOR SURFACE TREATMENT OF POLYOXYMETHYLENE MOLDED BODIES AND MOLDED BODIES OBTAINED ACCORDING TO THIS PROCEDURE.
US20040129677A1 (en) * 2002-12-20 2004-07-08 Jean-Claude Portner Surface treatment of polyacetal articles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235426A (en) * 1961-08-01 1966-02-15 Du Pont Method of rendering thermoplastic resins receptive to coatings
US4418162A (en) * 1980-04-30 1983-11-29 Polyplastics Co., Ltd. Process for treating the surface of polyacetal resin
GB2091274A (en) * 1980-12-05 1982-07-28 Polyplastics Co A process for the treatment of polyacetal articles
EP0259011A2 (en) * 1986-08-06 1988-03-09 Polyplastics Co. Ltd. Method of surface treating a moulded polyacetal resin product
ES2079192T3 (en) * 1991-06-22 1996-01-01 Basf Ag PROCEDURE FOR SURFACE TREATMENT OF POLYOXYMETHYLENE MOLDED BODIES AND MOLDED BODIES OBTAINED ACCORDING TO THIS PROCEDURE.
US20040129677A1 (en) * 2002-12-20 2004-07-08 Jean-Claude Portner Surface treatment of polyacetal articles

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Publication number Publication date
ES2288426B1 (en) 2008-12-16

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