DE2645031A1 - Spreadable coating compsn. - contains a thickener esp. methyl cellulose and a solventless primer - Google Patents

Abstract

A spreadable coating compsn. e.g. adhesives, dispersion paints contg. a thickener (I) or a workability improving agent (II) esp. the cellulose also contains a solventless primer (III) such as an air drying or modified natural oil or a natural or synthetic resin. The compsn. contains is not 0.2-0.3 wt. % (I) or (II). Surfaces can be simultaneously primed and coated and then dried or hardened. Although the compsn. contains no solvents the primer is able to penetrate the surface well. Storage of the compsn. is simpler and during coating there are no toxic or flammable vapours.

Description

Spreadable application compound such as construction adhesive,

Finished plaster, emulsion paint and the like.

The invention relates to a spreadable application compound such as construction adhesive, Finished plaster, dispersion paint and the like, with a thickening or processing aid, such as methyl cellulose.

Before such well-known construction adhesives, ready-made plasters and emulsion paints, which are generally referred to below as application compounds, onto the substrate are applied, this substrate must be pretreated with a primer. After drying or hardening, the actual application of the application compound can then be carried out take place.

The disadvantage is the high workload, since two work steps are necessary are. Furthermore, the primer takes a certain amount of time to dry out. Before applying the construction adhesive or the finished plaster or the emulsion paint, So there is usually a waiting time of a whole day. The primer must be be done carefully to achieve an even primer effect. the The cost of the primer is comparatively high.

The object of the invention is to make the known working method more economical and in particular the work process required to apply the primer to save, but without having to forego priming the substrate.

This object is achieved according to the invention in that a solvent-free Primer such as air-drying or modified natural oil, natural or synthetic resin in the application compound, such as construction adhesive, finished plaster, emulsion paint or the like. Is contained and that the proportion of the thickener or processing aid, such as.

Methyl cellulose is no more than about 0.2 to 0.3 wt. ', S.

The proportion of the primer is according to a training Invention in the order of about 10 wt.

, the order mass.

The essence of the invention is that in the application compound, for example, a construction adhesive that contains primer. The possibility, a conventional primer for the dispersion sear or the construction adhesive or the finished plaster to be mixed, however, en-l; we (le r woil dns product / too thin liquid or would not be processable. But if one would reduce the proportion of the solvent or even use a solvent-free primer, the primer effect would be do not occur because the primer remains trapped in the application compound and would not penetrate the substrate after the application compound has been applied would.

The invention is based on the idea that the thickener, which is contained in every plaster, construction adhesive and in every color for the purpose of sealing, is responsible for ensuring that the primer is held in the application compound and cannot diffuse into the subsurface.

If you now reduce this proportion of the thickener, so will the binding forces that hold the primer in the application compound, too decreased. From a proportion of about 0.3% by weight thickening agent, such as methyl cellulose in relation to the total mass, the binding forces are no longer sufficient to hold the primer to hold in the mass, so that after applying the mass to the substrate the primer dissolve from the mass and in the underground can migrate.

The proportion of the thickening agent or processing aid is preferably such as methyl cellulose, in the case of the coating composition according to the invention in the range from 0.1 to 0.3% The lower this proportion, the easier it is for the primer to work separate from the absorption mass and migrate into the subsoil.

The advantage of the invention is that a single operation sufficient to simultaneously prime the substrate and the application liquid, such as Apply construction adhesive, finished plaster and emulsion paint. The hardening of this coating compound takes place simultaneously with the drying or hardening of the primer, so that no There are waiting times. Compared to conventional primers, there are no Solvent needed more. Nevertheless, the primer penetrates well in the underground. Storage and processing are easier. While processing there are no harmful or flammable vapors.

The amount of primer in the application compound is determined by the application amount the adhesive, plaster or paint, as well as the absorption capacity of the substrate certainly. The distribution of the primer over the substrate he follows more evenly than with the known two-step process.

As primers are all natural, modified or synthetic products are used, which are a di & fusion and separation from the Allow glue, plaster or paint and that after deposition in the substrate Harden. Curing is a process caused by either oxygen or carbon dioxide runs in the air or by pure drying of the primer emulsion or solution takes place or made possible by changing the pH value in the substrate will.

The natural fatty oilers include semi-drying and drying Oils such as linseed oil, soybean oil, wood oil, castor oil, tall oil, ricine oil (DCO), coconut oil, Oiticicca oil, rapeseed oil, corn oil, cottonseed oil, perilla oil, poppy seed oil, nut oil, hemp oil, etc. Modified natural oils are: varnishes, dehydrated oils, isomerized oils Oils, styrenated oils, cyclo oils, gel oils, urethane oils, epoxy resin esters, maleic oils, Acrylic oils, cyclopentadiene adducts and acrylic resin modifications. Are natural resins e.g. shellac, cellulose ether, cellulose esters, bitumen and their modifications as well Rosin derivatives. Acrylate resins, for example, are used as synthetic primers Epoxy resins, melamine resins, diisocyanate resins, vinyl acetate resins, alkyd resins, water glass, Silicates used.

The primers detailed above are either in pure form, emulsion form or in dissolved form in the application compound, i.e. the Contains construction adhesive, finished plaster or emulsion paint.

Example] 1 Dio of the following recipe results in an emulsion paint, which contains 10% primer.

15.0% by weight acrylic acid ester copolymer 13.0 "% water 0.1" O / o Methyl cellulose 15000 xp 0.2 "% Calgon 135 (polyphosphate) 0.1"% Defoamer NXZ 0.1 "% 4-chloro-3-methyl-phenol 0.2"% xylene 8.0 "% titanium oxide RN56 0.3"% ammonia conc.

53.0 "% Calcite 1 - 20 µm grain size 10.0"% Linseed oil varnish 100.0 Aus The above recipe adds water and polyphosphate and defoamer as well 4-chloro-3-methyl-phenol and titanium dioxide mixed well for three minutes. Then it will be Methyl cellulose as a thickening agent and ammonia were added and mixed for about four minutes. Acrylic acid ester copolymer is then mixed in. Then calcite is added, again being thoroughly mixed for about three Min.

he follows. Finally, linseed oil and xylene are added.

The whole thing is then mixed for about 15 minutes.

The result is an emulsion paint that has a sufficient amount of Contains primer. If the mass is spread in the conventional way, sprayed on or rolled on, the primer penetrates into the substrate.

Example 2 The following formulation results in a finished plaster that also as in example 1 contains approx. 10% primer.

15.0% by weight acrylic acid ester copolymer 0.1 "% methyl cellulose 15000 xp 0.1 "% Calgon 135 (polyphosphate) 0.2"% defoamer NXZ 0.1 "% 4-chloro-3-methyl-phenol 0.3 "% ammonia conc.

6.0 "% titanium oxide RN56 0.2"% xylene 3.0 "% calcite 1-20 / µm grain size II "% Calcite 1-200 m grain size / 47.0% by weight calcite 40-350 µm Grain size 10.0 "% Calcite 1 - 2 mm 5.0"% Water 10.0 "% Linseed oil varnish 100.0 Work instruction: Mix water Calgon, defoamer, 4-chloro-3-methyl-phenol, titanium dioxide for approx. Three minutes. Then add methyl cellulose and mix for approx. 1 min. Then acrylic ester copolymer and ammonia and mix for approx. 4 minutes. Then xylene and linseed oil varnish interfere. Then mix in all types of calcite and mix in for 15 minutes.

This finished plaster is either sprayed on in a known manner or raised with a trowel. The primer splits with this recipe very quickly from the finished plaster and diffuses into the substrate.

After hardening, a good adhesion bridge to the finished plaster is created. Any loose particles or dust on the surface will be removed by the primer bound.

The primer has water-blocking properties, but allows the formation of a water vapor diffusion compensation layer.

Example 3 The following formulation results in a construction adhesive mi G 10% linseed oil varnish as a primer and a thickening agent content of 0.1 %.

15.0% by weight of vinyl acetate maleic acid ester 10.0 ", linseed oil varnish 0.1 "% Calgon 135 (polyphosphate) 0.1"% methyl cellulose 10,000 1.5 "% asbestos fibers 7 M02 10.0 "% water 0.1"% defoamer NXZ 0.1 "% 4-chloro-3-methyl-phenol 0.2 "% Ammonia 25% 62.9"% limestone powder 0 - 500 µm 100.0 Work instruction: water, Mix Calgon, defoamer, 4-chloro-3-methyl-phenol, asbestos fibers for approx. 3 minutes. Methyl cellulose add ammonia and mix for approx. 4 minutes. Then vinyl acetate maleic acid ester and add linseed oil varnish. Then add the limestone powder and mix for approx. 15 minutes.

The construction adhesive produced according to this recipe can optionally be included can be applied with a trowel or a notched trowel. The primer goes with it immediately into the substrate and hardens together with the setting of the adhesive. That The absorbency of the subsurface is reduced and a good bond is created achieved the construction adhesive.

The recipes for paints, plasters and construction adhesives can be modified by either the raw material base being different, or the fillers their grain size can be changed to accommodate other structures or processing options to be achieved, i.e. with the usual processing equipment such as trowel, trowel, brush, Spatula, roller or spray gun.

However, it is essential for all recipes that a primer as described, either neat or in the form of an emulsion or in solution and only contain that much thickener or processing aid is that a diffusion of the primer is guaranteed.

Other thickeners are, for example, those based on clay, which are known under the trade name Ben-tone and have relatively lower restraint forces to develop.

Claims (2)

Claims 1. Spreadable application compound such as construction adhesive, finished plaster, Emulsion paint and the like, with a thickening or in particular processing aids / methyl cellulose, thereby characterized in that a solvent-free primer, such as air-drying or contain modified natural oil or natural or synthetic resin is and that the proportion of the thickener or processing aid no longer than about 0.2-0.3 wt%. 2. Spreadable application compound according to claim 1, characterized in that that the proportion of the primer is about 10 wt.%.