JPH03181373A - Production and processing of multicomponent mixture based on reactive plastic - Google Patents

Abstract

PURPOSE: To carry out surface coating with reactive plastics by converting a cooled reactive plastics mixture into solid form and collecting material therefrom by rubbing it onto a surface to be coated. CONSTITUTION: Resin component A and curing agent component B are mixed, thereby forming a mixture M. Reaction of the mixture M is suppressed by injecting or spraying the mixture M into a bath consisting of liquid nitrogen N. Particles or pellets 10 are produced by quenching by liquid nitrogen bath. Pressing pellets 10 in an appropriate mold 14 and baking the same, thereby forming a solid body 12, which is pressed and adhered to the surface to be coated and guided while rubbing it along the same surface, thus the operation of this process is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is a method for the production and processing of multicomponent mixtures based on reactive plastics, in which the liquid phase mixture can be subjected to subsequent processing in a substantially dry manner. It relates to a type of cooling to a certain temperature.

[Conventional technology]

The above-mentioned type of manufacturing and processing method in the prior art by the same applicant, in the case of reactive glass metal processing, requires that the material be
It has the disadvantage and limitation that it can only be processed within a certain period of time when it is in a liquid, paste, or deformable state, the so-called pot life, and its processing characteristics may change significantly even within this time. My goal was to avoid it.

[Problem to be solved by the invention]

In contrast, the present invention provides a particularly simple method for coating surfaces with reactive plastics.

[Means to solve the problem]

The present invention solves the above problem by forming a cooled reaction plastic mixture into a solid body, and forming the solid body ηλ
The material is removed by rubbing it against the coating surface, and the material is melted and hardened on the coating surface by heating.

[Effect]

The advantage obtained with the process according to the invention is that even reactive plastics, whose processing is highly critical under the practical conditions prevailing in each case, can be processed according to the invention using conventional processes. Second, it can be easily applied to the surface to be coated, for example, when applying ski wax to skis. According to the conventional terminology, this operation is mainly called "wax application" or "wax application" and is complicated, but if it is applied to the new method proposed by the present invention, the reaction used can be Depending on the type of plastic, a self-closed and very hard surface layer is obtained, which is made of a reactive plastic which is polished in the solid state and is liquefied in the coating layer and then completely reacted. There is.

In principle, the novel method of the invention can be applied to all reactive plastics which have hitherto been applied in liquid phase to the surface to be coated, in short epoxy resins, methacrylate resins,
Polyurethane resins, silicone resins and polyester resins can be used. In an advantageous embodiment of the inventive process, the particularly advantageous cold-reactive reactive liquid plastic is first cooled according to the inventive process to such an extent that the reaction of said reactive liquid plastic is inhibited. The cooling takes place with a cryogenic liquid gas, for example liquid nitrogen, in which case, according to a first advantageous variant, for example a promoter,
Retarders, leveling agents, pigments, hydrophobic additives or hydrophilic additives, and in some cases fillers, are added to the desired formulation to form a liquid mixture that is mixed and reacted. Silasnack is cured by injection into a liquid gas bath.

9 that occurs at that time! , by cooling and by the method of pouring or injecting the liquid plastic into the bath, solid particles of a defined particle size are produced (hereinafter referred to as pellets). The pellets are pressed or etched together into a relatively large cohesive solid body from which the amount required for coating is removed by frictional contact with the surface to be coated. The pressing or sintering step can influence the tensile strength, compressive strength and abrasion strength of the molded piece produced in the desired shape.

According to a second variant of the method according to the invention, the reaction liquid plastic of the predetermined formulation is cast into a mold cooled, for example by cryogenic liquid gas, and solidified within a short period of time by pressing a button into the mold. It is also possible to obtain the desired molded piece, which, as in the first case, is also sintered together and does not consist of tahillet, since the surface to be coated is in frictional contact with the surface to be coated. A material application is then carried out, which, as already mentioned, passes through a liquid phase to form a fully cured plastic layer.

In order to ensure that the scraped solid bodies of the coating material remain in a cooled solid state even during relatively long coating processes, the solid bodies are particularly preferably cooled and held in a cooled state. It gets squeezed into your body. The present invention provides a coating material L
(near) A new holding system with a cooling chamber used during coating.
It also relates to the guide device.

〔Example〕

Next, the present invention will be explained in detail based on the drawings.The manufacturing process shown in FIG.
This begins with a conversion stage in which the esters are admixed, optionally with other substances defined depending on the desired formulation. The reaction of the mixture M is suppressed by injecting or injecting the mixture M into a bath containing liquid nitrogen N70). Quenching with a liquid nitrogen bath produces particles or pellets 10 that can be stored in the cooled state for virtually any period of time.

If you start with pellet 10, the next step is to pick up pellet 1.
By pressing in a suitable mold 14 and sintering therein, a relatively large solid body 12, for example a rectangular parallelepiped or a cylinder, is produced. In short, in the exemplary embodiment shown, the solid body 12 is a sintered body with a granular structure, and in some cases, as already mentioned, it can also be produced as a cast body with a homogeneous structure. The solid shaped piece 12 has unlimited storage capacity and shape stability in a cooled state.

2 and 5 illustrate a novel application method for coating surfaces with reactive liquid plastics.

According to FIG. 2, the molded piece 12 is accommodated in a holding device 16, in this case pistol-shaped, which has a cooling medium chamber 187 for this coating, and a plurality of coolant chambers 187 for this coating. The medium chamber is filled with, for example, cryogenic liquid gas, solid carbonic acid or other O refrigerant. The coolant chamber 18 is typically a frozen reactive plastic molded piece 12fr.

Encircle and prevent early ice melt.

For example, when coating a tube wall 20, a tube bottom 22, a container wall or other surfaces, the molded piece 12 is pressed onto the surface to be coated and guided along the surface with friction. In this case, the coated surface layer 24 is similar to the case with the coating of a wax layer. With O, which is a reactive plastic, the coating material is heated, forming a relatively uniform liquid film on it, and hardens upon complete reaction.

If desired, the temperature conditions during coating can be monitored and controlled, in which case, for example, according to the third prisoner, the cooling device 26 entrained during coating can be Maintaining the temperature below a predetermined limit, a force and/or heating device 28 heats the surface to be coated to a predetermined minimum temperature.

Since the molded piece 12 becomes progressively shorter due to friction reduction, the holding device 16 is equipped with a mechanical feed mechanism 30, which moves the molded piece 12 in a cooled manner. By means of step-by-step pushing from the guide or holder, the free front end of the profiled piece 12 can be pressed against the surface 20 or 22 to be coated by means of Vc.

Of course, the type and size of the holding device 16(7) is relevant whether small surfaces or relatively large surfaces are to be coated manually or mechanically. In principle, the novel method of the invention can also be used, for example, for cottage industries, where only point-wise insulating coatings have to be modified or where small surfaces have to be coated with wear-resistant linings, and also, for example, for certain Also suitable for factory production of plates with coatings. A further application is, for example, the painting of road markings using a mobile holding device. Mention may also be made of the coating process of casing fabrics, which can impregnate the fabric during the coating operation due to the liquefaction Q of the reactive plastic.

Of course, the temperatures to be observed in each case, the pressure of the molded piece 12 on the coating surfaces, the friction speed and other parameters are dependent on the particular application and the reactive plastic used. Based on this, the measures to be taken to obtain optimal working conditions are determined.

In a simple application, it is possible to rub the molded piece 12 drawn out of the cooled container onto the surface to be coated without further cooling, or to provide only a heat insulator instead of a cooling medium chamber. It is also possible to use a light beam simply by storing it in a holding device that does not have it and processing it.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a method for manufacturing a molded piece used for applying containment to a surface, and Fig. 2 is a schematic diagram of a holding device having a cooling chamber for accommodating the molded piece shown in Fig. 1. figure,
Figure 3 shows the first point in frictional contact with the surface to which containment ink is to be applied.
FIG. 3 is a cross-sectional view of the molded piece shown in the figure. A...Resin component, B...Curing agent component, M...Mixture, N...Liquid nitrogen bath, 10...Particles or pellets, 12...Solid body as molded piece, 14.・Type, 1
5... Holding device, 18... Cooling medium chamber, 20...
Wall surface, 22... Bottom surface, 24... Surface layer, 26-...
Cooling device, 28... Heating device, 30... Feeding mechanism. 73 (no l1 in the inner shrine) Hand (method) ■, Display of the case 1999 Patent Application No. 319072 2, Name of the invention 3゜ Person making the amendment Relationship to the case Patent applicant Mr. T, Mr. W Name Carl・Reinhard Zeiss (and 1 other person) 3/6/1990, Subject of amendment (1) Power of attorney (2) Drawing month 27th (shipment mortar) 7゜ Contents of amendment

Claims (1)

[Scope of Claims] 1. A method for producing and processing a multicomponent mixture based on a reactive plastic, in which a liquid phase mixture is cooled to a temperature that allows subsequent processing in a substantially dry manner, which comprises: The reacted plastic mixture is formed into a solid body, the material is removed from the solid body by rubbing it on the surface to be coated, the material is melted on the surface to be coated by heating and Process for the production and processing of multicomponent mixtures based on reactive plastics, which are characterized by hardening. 2. The reacted plastic mixture is first formed into relatively small solid particles during or after cooling, these solid particles are pressed together into one larger woven solid body, and then from the solid body the coating is formed. 2. The manufacturing and processing method according to claim 1, wherein the material is scraped off. 3. The manufacturing and processing method according to claim 1 or 2, wherein the liquid-phase reactive plastic mixture is brought into a solid-phase agglomerated state using an extremely low-temperature liquid gas. 4. Process according to claim 3, characterized in that the liquid-phase reactive plastics mixture is solidified by casting or by injection into a liquid gas bath. 5. Process according to claim 3, characterized in that the reaction plastics mixture in liquid phase is solidified in a cooled form by means of a liquid gas. 6. The manufacturing and processing method according to any one of claims 1 to 5, wherein the solid body from which the coating material is scraped off is kept in a cooled state during the scraping operation. 7. Claim characterized in that it consists of a receiving container for holding and guiding the solid body to be processed by scraping and at least one cooling medium chamber (18) in contact with the receiving container. 6. An apparatus for carrying out the method described in 6.