GRANULATE AND COATING AGENT PRODUCED THEREFROM

Abstract

Presented and described is a granulate for producing a coating agent, in particular a dispersion paint, wherein the granulate contains, in each case based on the total weight of the granulate, a) 2 to 60 wt. % binder, b) 5 to 85 wt. % pigment and/or filler and c) 1 to 15 wt. % additives. By adding water, it is possible to produce a coating agent, in particular a dispersion paint, using the granulate. The addition of water to the granulate and the production of coating agent, in particular the dispersion paint, preferably take place directly in the container in which the granulate is stored.

Claims

1. Granulate for producing a coating agent, wherein the granulate, in each case based on the total weight of the granulate, contains a) 2 to 60 wt. % binder, b) 5 to 85 wt. % pigment and/or filler, c) 1 to 15 wt. % additives.

2. Granulate according to claim 1, characterized in that the granulate is suitable for producing a coating agent, in particular a ready-to-use coating agent, wherein the preparation is carried out by adding water to the granulate and then optionally mixing the components, in particular mixing by stirring.

3. Granulate according to either claim 1 or claim 2, characterized in that the granulate contains 3 to 50 wt. %, in particular 4 to 40 wt. %, 5 to 30 wt. %, 6 to 20 wt. %, 7 to 17 wt. %, 8 to 15 wt. % or 9 to 13 wt. %, binder, in each case based on the total weight of the granulate.

4. Granulate according to any of the preceding claims, characterized in that the binder is selected from the group consisting of poly(vinyl acetate-alkenoic acid) copolymers, such as poly(vinyl acetate-crotonic acid) copolymer, poly(vinyl acetate-olefin) copolymers, such as poly(ethylene vinyl acetate) copolymer, poly(vinyl acetate-vinyl chloride-ethylene) copolymer, poly(styrene-acrylic acid) copolymer, poly(acrylic acid) polymer, poly(vinyl acetate-vinyl ester-ethylene) copolymer, poly(vinyl chloride-ethylene) copolymer, poly(vinyl acetate-ethylene-methyl (meth)acrylate), poly(vinyl acetate-ethylene-acrylic acid ester) copolymer, poly(vinyl chloride-ethylene-vinyl laurate) copolymer, and mixtures thereof.

5. Granulate according to any of the preceding claims, characterized in that the binder has a minimum film-forming temperature MFT of less than 20° C., in particular less than 15° C., less than 10° C., less than 5° C. or of 0° C., measured according to Standard ISO 2115.

6. Granulate according to any of the preceding claims, characterized in that the granulate contains 20 to 85 wt. %, in particular 20 to 75 wt. %, 25 to 70 wt. %, 30 to 60 wt. %, or 30 to 50 wt. %, filler, in each case based on the total weight of the granulate.

7. Granulate according to any of the preceding claims, characterized in that the filler is selected from the group consisting of dolomite, barium sulfate, feldspar, quartz, calcium carbonate, mica, kaolin, calcined kaolin, talc, plastics particles, clay, silica, diatomaceous earth, and mixtures thereof.

8. Granulate according to any of the preceding claims, characterized in that based on the total weight of the granulate, the granulate has a water content of less than 5 wt. %, in particular less than 4 wt. %, less than 3 wt. %, less than 2 wt. %, less than 1 wt. % or less than 0.5 wt. %.

9. Granulate according to any of the preceding claims, characterized in that the granulate has an average particle size of 0.1 to 4 mm, in particular 0.2 to 3.5 mm, 0.3 to 3 mm, 0.4 to 2.5 mm, 0.5 to 2 mm, 0.7 to 1.8 mm or 0.8 to 1.5 mm.

10. Granulate according to any of the preceding claims, characterized in that the granulate is substantially spherical.

11. Granulate according to any of the preceding claims, characterized in that the granulate has a bulk density of 0.5 to 1.8 g/ml, in particular 0.6 to 1.5 g/ml or 0.9 to 1.1 g/ml, measured according to DIN ISO 697.

12. Granulate according to any of the preceding claims, characterized in that the granulate contains 5 to 60 wt. %, in particular 15 to 30 wt. %, pigment, in each case based on the total weight of the granulate.

13. Granulate according to any of the preceding claims, characterized in that the pigment is selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, (di)arylides, azo condensation pigments, pyranthones, isoidolines, anthraquinones, derivatives of a dioxazines, perinones, naphthol AS derivatives, perylenes, indanthrenes, phthalocyanines, rutile tin zinc, quinacridones, diketopyrrolopyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, carbon black, iron oxide black, pyrazoloquinazolone, naphthol AS monoazo pigment, pigment violet 23, and mixtures thereof.

14. Granulate according to any of the preceding claims, characterized in that the granulate contains at least one additive from the group consisting of wetting agents and dispersants, defoamers, rheological additives, anti-floating agents, leveling agents, lubricants, swelling agents and matting agents.

15. Granulate according to any of the preceding claims, characterized in that the granulate is substantially free from preservatives.

16. Method for producing a granulate, in particular a granulate according to any of claims 1 to 15, comprising at least the steps of a. providing an aqueous dispersion containing, in each case based on the solids content of the dispersion, i. 2 to 60 wt. % binder, ii. 5 to 85 wt. % pigment and/or filler, iii. 1 to 15 wt. % additives b. granulating the dispersion provided in a. to form a granulate, c. setting the water content of the granulate to less than 5 wt. %, based on the total weight of the granulate.

17. Method according to claim 16, characterized in that the aqueous dispersion in step a. contains 40 to 80 wt. % water, based on the total weight of the dispersion.

18. Method according to any of claim 16 or 17, characterized in that the water content is set according to method step c. in the course of the granulating in method step b.

19. Method according to any of claims 16 to 18, characterized in that the water content of the granulate is set to less than 4 wt. %, less than 3 wt. %, less than 2 wt. %, less than 1 wt. % or less than 0.5 wt. %, based on the total weight of the granulate.

20. Method according to any of claims 16 to 19, characterized in that the aqueous dispersion has a solids content of 20 to 60 wt. %, in particular 30 to 50 wt. % or 35 to 45 wt. %, based on the total weight of the dispersion.

21. Method according to any of claims 16 to 20, characterized in that the granulating the dispersion provided in a. takes place by means of spray granulation.

22. Method according to claim 21, characterized in that the granulating takes place by means of spray granulation in a fluidized bed reactor.

23. Method according to claim 22, characterized in that the exhaust air temperature in the fluidized bed reactor is less than 100° C., in particular less than 50° C. or less than 35° C.

24. Method according to claim 22 or claim 23, characterized in that the product temperature in the fluidized bed reactor is less than 80° C., in particular less than 50° C. or less than 35° C.

25. Method according to any of claims 22 to 24, characterized in that the supply air temperature in the fluidized bed reactor is 30 to 150° C., in particular 50 to 100° C. or 60 to 80° C.

26. Method according to any of claims 16 to 25, characterized in that the binder has a minimum film-forming temperature MFT of less than 20° C., in particular less than 15° C., less than 10° C., less than 5° C. or of 0° C., measured according to Standard ISO 2115.

27. Granulate obtainable by a method according to any of claims 16 to 26.

28. Method for producing a coating agent, comprising at least the steps of a. providing a granulate according to any of claim 1 to 15 or 27, b. mixing the granulate with water to produce the coating agent.

29. Method according to claim 28, characterized in that the weight ratio of granulate to water is from 10:90 to 90:10, in particular from 20:80 to 80:20 or from 30:70 to 70:30 or from 50:50 to 65:35.

30. Use of a granulate according to any of claim 1 to 15 or 27 for producing a coating agent.

31. Use according to claim 30, characterized in that the coating agent is a dispersion paint.

32. Container for mixing a coating agent, wherein the container comprises a granulate according to any of claim 1 to 15 or 27.

33. Container according to claim 32, characterized in that the container is dimensioned such that it is suitable for receiving water and mixing a coating agent.

34. Container according to claim 32 or 33, characterized in that the container is closable in a substantially airtight manner and is suitable for storing the coating agent.

35. Container according to claim 34, characterized in that the container is re-closable.

36. Container according to any of claims 32 to 35, characterized in that the container has a marking which indicates the fill level of the water to be introduced.

Description

EXAMPLE

[0058] An aqueous component A was prepared and mixed using the ingredients listed in Table 1.

TABLE-US-00001 TABLE 1 amounts in each case based on the total weight of component A Ingredient Amount in wt. % Water 38.15 Filler 45.51 Pigment 12.36 Wetting agent 0.34 Defoamer 0.28 Rheology additive 3.36

[0059] The aqueous binder component B was then provided using the ingredients listed in Table 2.

TABLE-US-00002 TABLE 2 amounts in each case based on the total weight of component B Ingredient Amount in wt. % Water 50 Binder (based on a 50 copolymer of vinyl acetate and ethylene)

[0060] Components A and B were introduced into a further amount of water, wherein 6.16 kg of component A, 0.84 kg of component B and 1.26 kg of water were used. This mixture was then spray granulated in a fluidized bed reactor, the supply air temperature being 60 to 80° C., the exhaust air temperature being 40 to 45° C. and the product temperature being less than 40° C. The product dried and granulated well, no softening of the product could be observed. 3.0 kg of a granulate having an average particle size of 0.311 mm and a residual moisture content of less than 1 wt. %, based on the total weight of the granulate, was obtained.

[0061] The granulate obtained in this way was then placed in a paint bucket and 2 kg of water was poured onto the 3 kg of granulate in the paint bucket. The water could distribute well between the granulate particles. The mixture was then manually stirred twice. Immediately after stirring, the obtained dispersion paint could be picked up with a paint brush and used to paint a surface.