DE2350410A1 - Water-repellent three-phase system adhesive cement - contg. filler and resin solid phase and resin and siloxane solvent phase - Google Patents

Abstract

Water-repellent 3-phase system contains a solid, an aq. and a solvent phase. Solid phase consists of fillers, pigments and undissolved resins. Aq. phase contains emulsifiers and stabilisers. Solvent phase contains dissolved resins and siloxane resins, opt. also soluble metal soaps. Dissolved resin may contain 50-90% solids in soln. Mixing ratio dissolved-dispersed resin, calculated w.r.t. solids, is 1:10 to 1:1. Compsns. are useful as adhesive cements for glass and ceramic tiles, outdoor plaster, adhesive resin cements and jointing materials. Systems are water-tight and adhere well to silicate substrates.

Description

235Q410

Edvard B. Grünau BDB Dr. rer. nat. · 4 Düsseldorf-N. ■ Feiix-Klein-Strasse 1 · Telephone 43 50 Building chemistry, building physics and building material development

10/5/73

Patent designation :

Hydrophobic three-phase systems for adhesives, synthetic resins. and sealants

State of the art

Adhesive for ceramic plates, synthetic resin mortar, synthetic resin plaster and synthetic resin sealants either consist of a binder based on reactive resins, Resin dispersions or dissolved resins.

There are also known methods in which a synthetic resin dispersion liquid and pasty low molecular weight resins are mixed up to a tolerance limit. This The inventor had already found a method in 1961 and reported on it. In this way you can use plastic masses, which are then provided with sand and fillers, give them a certain plasticity. At the same time, in This reduces the water content of these masses.

Subject matter of the invention

New three-phase systems have been developed in which the solid phase includes the fillers as well as the solid resin particles. The aqueous phase is with the added emulsifying and stabilizing aids of the dis-

^ persion enriched. The new solvent is added

cd phase. It contains medium and high molecular weight resins that

_λ by polymerizing certain groups into an emulsion ^ greedy and miscible state. There are - * soft or medium-soft resins with a significant backward _i employability. -.

It can involve the OO or terpolymers of the acrylates, the Metharcylate or Vinylester with similar and other suitable resins such as the vinyl toluenes or MciLe '' ri- ~ odev Fu m Qr acid star among others

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Postal checking account Frankfurt / M 145057 Commerzbank Hamburg 67, current account 48 02 534 Commerzbank Düsseldorf, current account 6411763

^ 350410

These resins also expediently have a certain amount

Degree of networking. The solids content of this mostly Resins produced in solution polymerization are 50-85 percent by weight, depending on the type of polymer.

A three-phase mixture is obtained in this way. This way of mixing resins together is new and so is that Resins for this purpose have had to be redeveloped. A three-phase mixture is obtained in this way has the advantage that the dispersed resin particles after evaporation of the water and solvents melt together with the dissolved resin and are no longer re-emulsifiable. In addition, these Masses resilient (rubber-elastic) and they are really soft without the need for a plasticizer must add.

Processes like the resins developed for them are new, but similar, albeit more modest, had been used in the past Effects through the addition of liquid resins and also of solvents such as alcohols and Aromatics.

The addition of water-repellent components is crucial, which go into the solvent phase. One can excellently use siloxane resins (the methyl like the Introduce phenylsiloxane resins) into the solvent phase. The addition of soluble metal soaps is also advantageous for certain applications. However, while the metal soaps reduce the adhesion on the substrates, which in some special cases If desired, the siloxane resin improves the adhesion at the interfaces with silicate or silicates containing building materials.

This enables you to use building materials such as exterior plaster, Manufacture adhesives for glass and ceramic plates, adhesive synthetic resin mortars and sealants in which proportions

of the siloxane resin migrate into the subsoil and thus capillary inactivate the subsoil if

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509817/1118

this surface is absorbent. The adhesive surface is then no longer undermined by the water and that is In addition to good water resistance, water repellency and good adhesion, this is a decisive advantage for the service life of the bond, the plaster or the sealant, because the interface cannot more water can be submerged and all subsequent damage will not occur.

It is known to add small amounts of resins to siloxane resin solutions (Auslegeschrift 1 671 28o) and it is also known to mix special, compatible resins with siloxane resins for the purpose of Manufacture of facade paints (Offenlegungsschrift 2 15 ° 736). However, these procedures affect the Subject of the new invention is not.

Application example

Adhesive mortar for ceramic plates

50% synthetic resin dispersion based on acrylic and methacrylic copolymers 25 parts ^{by weight 1} p. 70 % solution of a weakly crosslinked acrylic-methacrylic copolymer 12 parts by weight. 5o % Siloxan resin solution 6 parts by weight.

Fillers 57 parts by weight,

Claims (1)

Patent entitlement Production of three-phase systems for mortar, exterior plasters, Adhesives and sealants that are water-repellent, waterproof, and adhere well to silicate substrates which part of the siloxane resin inactivates the subsurface by capillary action. The solid phase consists of the fillers, pigments and undissolved resins. The aqueous phase contains emulsifying and stabilizing aids. The solvent phase contains dissolved resins and siloxane resins - alternatively also soluble metal soaps. The dissolved resin in the solution can contain 50-90% solids; the mixing ratio of dissolved to dispersed resin on solids is in the range from 1: 10 to 1: 1. / '"* 509817/1118 _<r O ^ p -—— ν