Anti-acid-alkali water-based coating

A water-based paint, acid and alkali resistant technology, applied in the direction of coating, latex paint, etc., can solve the problems of expensive film-forming materials and difficult promotion, and achieve the effect of low price, simple manufacturing process and good protection

Active Publication Date: 2005-07-20
CHONGQING XINGYU POLYMER PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is mainly used as a film-forming substance by compounding acrylic emulsion and silicone resin. Although its anti-acid and alkali performance has been improved, these improved film-forming substances are currently very expensive and very difficult to promote.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: Contain sodium dihydrogen phosphate NaH in the water-based paint 2 PO 4 and disodium hydrogen phosphate Na 2 HPO 4 , and sodium dihydrogen phosphate NaH 2 PO 4 With disodium hydrogen phosphate Na 2 HPO 4 The molar ratio is 0.05:1, that is, the weight ratio is 0.042:1, and the total phosphate molar concentration in the water-based paint is 0.01 mole / liter; that is, in one liter of water-based paint, its weight is between 1.2 kg and 2.5 kg , sodium dihydrogen phosphate NaH 2 PO 4 and disodium hydrogen phosphate Na 2 HPO 4 The weights are 0.06 g and 1.35 g, respectively.

[0014] In this embodiment, the existing water-based coating can be made of vinegar-acrylic emulsion, wetting agent, dispersant, defoamer, film-forming aid, concentration is 2% thickener, light calcium, talcum powder, titanium Composition of white powder and water. Now take the water-based paint of 100 grams of the present embodiment as an example to illustrate the preparation me...

Embodiment 2

[0022] Embodiment 2: Contain sodium dihydrogen phosphate NaH in the aqueous paint 2 PO 4 and dipotassium phosphate K 2 HPO 4 , and sodium dihydrogen phosphate NaH 2 PO 4 dipotassium phosphate K 2 HPO 4 The molar ratio is 1:1, that is, the weight ratio is 0.69:1, and the total phosphate molar concentration in the water-based paint is 0.2 mol / liter; that is, in one liter of water-based paint, the weight is between 1.2 kg and 2.5 kg , sodium dihydrogen phosphate NaH 2 PO 4 and dipotassium phosphate K 2 HPO 4 The weights are 12.0 grams and 17.4 grams, respectively.

[0023] In this embodiment, the existing water-based coating can be made of pure acrylic emulsion, wetting agent, dispersant, defoamer, film-forming aid, concentration is 2% thickener, heavy calcium, barite powder, Composed of titanium dioxide and water. Now take the water-based paint of 100 grams of the present embodiment as an example to illustrate the preparation method of the present embodiment. At firs...

Embodiment 3

[0032] Embodiment 3: Contain sodium dihydrogen phosphate NaH in the water-based paint 2 PO 4 and diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 , and sodium dihydrogen phosphate NaH 2 PO 4 With diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 The molar ratio is 20:1, that is, the weight ratio is 18.2:1, and the total phosphate molar concentration in the water-based paint is 0.5 mol / liter; that is, in one liter of water-based paint, its weight is between 1.2 kg and 2.5 kg , sodium dihydrogen phosphate NaH 2 PO 4 and diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 The weights are 57.14 grams and 3.14 grams, respectively.

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PUM

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Abstract

The acid and alkali resisting water paint has common water paint components, and features that it comprises sodium dihydrogen phosphate, potassium dihydrogen phosphate or ammonium dihydrogen phosphate; and disodium hydrogen phosphate, dipotassium hydrogen phosphate or diammonium hydrogen phosphate in the molar ratio of 0.05-20 and total molar concentration of 0.01-0.5 mol / L to form the buffering pair in the paint. The present invention can resist the corrosion of various acid and alkali matters, has simple preparation process and low cost.

Description

(1) Technical field [0001] The invention relates to a paint for plastering walls, in particular to a water-based paint for new and old cement walls and concrete walls. (2) Technical background [0002] Wall cement contains soluble alkaline components, such as calcium hydroxide (Ca(OH) 2 ), sodium carbonate (NaCO 3 ), etc., during the maturing process of cement, its wall surface is strongly alkaline, even if it is a mature cement wall surface, due to the presence of moisture in the wall, the alkaline substances in the cement will slowly be taken out of the wall surface, Under normal circumstances, alkaline substances can easily pass through the putty layer to reach the paint surface. Under the action of the alkaline environment, the paint surface will appear white flowers, discoloration, uneven gloss, etc. in the light case, and powder will fall off and powder off in the severe case; In addition, the paint surface is not only eroded by the alkaline substances in the inner l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/02C09D7/12
Inventor 季金苟
Owner CHONGQING XINGYU POLYMER PAINT
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