Stone bottom surface protection requires different protective agent

Stone bottom surface protection requires different protective agent

Different from surface protecting agent for stone, stone bottom surface protective agent has more requirements, generally speaking, the stone bottom surface protection agent must solve these problems:

The problem of adhesion 1, must deal with cement mortar.

2, must have waterproof effect

Metal piece 3, embedded in the stone will rust, it must possess the antifouling effect

4, must effectively prevent penetration of alkaline substances in the cement of stone

So we are here to introduce some performance requirements of stone bottom surface and the side surface of the protective agent and method of use.

, a bottom surface protection agent

Bottom protective agent is generally used in non aqueous dispersion resin and moisture curing polyurethane resin with a zhuang. According to the need to add a body of paint, anti foam agent, dispersing agent, anti settling agent, thickening agent, etc..

1, water dispersible resin type should be used by the base material of acrylic acid, ethylene and styrene and vinyl acetate monomer polymer or copolymer dispersed in mineral oil and other non aqueous dispersion medium. Here the non aqueous dispersion medium high burning point, low toxicity, convenient construction.

Use polyurethane by curing isocyanate resin, preferably in the presence of water use, in 3 to 8 h and curing unit wet curing polyurethane resin.

3, pigment using calcium carbonate, talc, clay, etc..

4, admixture

(1) using vinyl polymer defoamer. It can prevent the construction of the treatment agent foaming, resulting in uneven phenomenon.

(2) use carboxylate divided powder, it is easy to disperse mixture.

(3), using polyether ester anti settling agent, prevent from resin solid precipitation in dispersion medium.

(4) is attached more convenient for construction, use of bentonite thickener

, two door attached stone processing method:

First in the stone surface and the side surface to 0.2 ~ spray coating amount 0.3kg/m or roller coating door processing agent, and attached to the wall of the building or the ground, at room temperature by 1 ~ 2H after protective treatment curing agent, stone and the wall or ground fully bonded.

In experiment three, protection

Non dispersed acrylic resin 46.1%;

Moisture curable polyurethane resin 19.7%;

Pigment (calcium carbonate) 26.3%;

Defoaming agent (specific ethylene polymer) 0.7%;

Dispersant (carboxylate) 1.3%;

Anti settling agent (polyether ester, surfactant) 1-3%;

Thickener (bentonite) 2%;

Oil solvent oil (high boiling hydrocarbon solvent) 2.6%.

The protective agent from 0.2 ~ 0.3kg/m coating amount to face and side of the granite, the following performance test:

1, accelerated efflorescence test

With 5% sodium sulfate solution on the surface of granite protective treatment accelerated efflorescence test. The results show that the surface of the stone is not frost free, and it does not change color.

2, adhesion test

In granite door processing surface is coated with mortar, maintenance for 21 days and in the mortar surface with epoxy resin bonded steel formwork, placed 2h, adhesion was measured using a tensile testing machine. The results show that the adhesion is strong, reaching 7kg/cm.

3, and the sealing material adhesion test

In granite door processing surface is coated with sealing material, drying, and then on the sealing surface coating with epoxy resin bonded steel template. After 2H with tensile testing machine adhesion was measured. The results show that the adhesion of the sealing material is stronger, reaching 5kg/cm.

4, construction of evaluation

To evaluate the spread of granite. The results show that the construction is good.

Four, the

Generally use the component bottom protective agent 4 can effectively solve the problem about the opening. Non aqueous dispersion type resin and the moisture curing polyurethane resin mix of the two, can learn from each other, give full play to their comprehensive performance and construction: one is to improve the water resistance, alkali resistance and other properties, prevent pollution of Pan cream, lip and rust spots on the stone surface; the second is reinforced with concrete, cement mortar and sealing material adhesion