COATING AGENT AND ITS USE, AND METHOD OF PRODUCING ARTICLES FOR THIS USE

Abstract

a binder, consisting of at least one wax and optionally additional additives, characterized in that the at least one wax is constituted of at least a base wax portion and a synthetic wax portion and that the melting point of the synthetic wax portion is higher than the melting point of the base wax portion.

Claims

1-7. (canceled)

8. A binding agent, comprising: at least one wax; and optional further additives, wherein the at least one wax is includes base wax portion and a synthetic wax portion, and wherein the synthetic wax portion has a melting point that is greater/higher than a melting point of the base wax portion.

9. The agent according to claim 8, wherein the base wax portion is between 20 and 70% by weight and the synthetic wax portion is between 30 and 80% by weight.

10. The agent according to claim 8, wherein the base wax portion is microwax and/or paraffin wax and the base wax portion has a melting point of between 60° C. and 80° C.

11. The agent according to claim 8, wherein the synthetic wax portion is an ethylene propylene polymer, polyethylene wax and/or polyalphaolefin and the synthetic wax has a melting point of more than 80° C.

12. A method for producing design models in automotive development, comprising the steps of: using a binding agent according to claim 8, wherein the binding agent is formed as an intermediate layer between a porous basic frame and industrial clay.

13. The method for producing design models in automotive development according to claim 12, wherein the method is organized into the following procedural steps: step 1: providing a basic frame with a porous structure; step 2: applying a coating to the basic frame by of a manual or machine application method, wherein the binding agent is at a temperature of 60° C. to 120° C. at a time of application; step 3: solidifying the coating on the basic frame by passive cooling at room temperature and/or active cooling by cooling systems; and step 4: applying one or more layers of industrial clay, wherein the industrial clay is at a temperature of approximately 60° C.-80° C. at a time of application, wherein the applying of the industrial clay is carried out manually, in a semi-automatic manor and/or in a fully automatic manner.

14. The method according to claim 13, wherein the binding agent is at a temperature of 70° C. to 100° C. at a time of application.

15. The method according to claim 13, further further comprising a step 5 of fine processing/finishing of the surface to perfect and/or adjust the design.

Description

GENERAL EXAMPLE 1

[0028] 20-70% by weight base wax and/or base wax portion (BW) [0029] 30-80% by weight synthetic wax (SW) [0030] 0-20% by weight other additives

GENERAL EXAMPLE 2

[0031] 35-65% by weight base wax portion (BW) [0032] 65-35% by weight synthetic wax (SW) [0033] 0-10% by weight other additives

Formulation Example 1—Coating Agent

[0034] 40% by weight paraffin wax (BW) [0035] 60% by weight synthetic wax (SW)

Formulation Example 2—Coating Agent

[0036] 28% by weight paraffin wax [0037] 30% by weight microwax [0038] 42% by weight synthetic wax

Formulation Example 3—Coating Agent

[0039] 58% by weight microwax [0040] 37% by weight synthetic wax [0041] 5% by weight colorant, rheological additive and tackifier

Formulation Example—Lightweight Industrial Clay (prior art)

[0042] 33% by weight paraffin wax+microwax [0043] 5% by weight white oil [0044] 45% by weight calcium stearate (filler) [0045] 16% by weight lightweight filler [0046] 2% by weight iron oxide as colorant

[0047] In order to be able to establish and evaluate any improvement in the adhesion, tensile tests were carried out with a Zwick Universal Testing Machine. In this regard, the Lest piece is clamped at both ends. After the specimen has been clamped, the clamping system is spread apart at a defined speed and the maximum force, Fmax, which is necessary at the time for rupture of the test piece is measured.

[0048] In the case of the present subject matter of the application, the test piece consists of a layered model consisting of basic frame, coating agent and industrial clay, wherein the clamping points are formed by the basic frame on the one hand and the industrial clay on the other hand. The tens le tests were carried out at room temperature.

[0049] Fmax was determined, wherein an increase in Fmax is associated with an increase in the adhesive force.

[0050] The porous basic frame in the test was a porous foam body.

[0051] Dimensions or the test specimens: length 55 mm, width 10 mm and height 120 mm.

[0052] The present invention with an increase in adhesion between industrial clay and basic frame will now be illustrated in more detail with the aid of the tables below.

TABLE-US-00001 TABLE Increase in adhesive force Fmax Inventive response, with coating agent according to Formulation 209 N Example 1, wherein the layer is applied with a brush and wherein the industrial clay application is carried out by machine Prior art response, specimen coated with shellac and clay applied 189 N using a manual method Prior art response, specimen coated with shellac and clay applied  21 N by machine

[0053] The method in accordance with the invention for the production of models or design models in automotive development will now be described in more detail.

[0054] The method is organised into the following procedural steps:

[0055] Step 1: providing a basic frame, preferably with a porous structure.

[0056] Step 2: applying a fused coating agent to the basic frame by means of a manual or machine application method, wherein at the time of application, the coating agent described above is at a temperature at which the base wax portion and the synthetic wax portion are fused.

[0057] Step 3: solidifying the coating agent on the surface of the basic frame by passive cooling at room temperature and/or active cooling by means of cooling systems such as with fans.

[0058] Step 4: applying at least one layer of industrial clay, wherein at the time of application, the industrial clay is at a temperature of approximately 60° C. to 120 ° C., preferably 70° C. to 100° C., wherein the application of the industrial clay is carried out manually, in a semi-automatic and/or in a fully automatic manner.

[0059] Optional step 5: fine processing/finishing of surface in order to perfect and/or adjust the design.

[0060] Use: the coating agent in accordance with the invention is used in the production of design models in automotive development, wherein the coating agent is configured as an intermediate layer between the porous basic frame and the industrial clay.