Summary of the invention
The present invention is in order to solve the shortcoming that traditional water proof putty high alkalinity and rigidity cause, big as traditional water proof putty alkalescence, curing cycle is long, alkaline powder has injury to human body when being difficult for polishing and polishing, and easily cause problem such as grow dim during the brushing emulsion paint, provide a kind of cohesive strength height, easily polishing, neutral putty paste of water-tolerant (the putty pH value is about 9, and the pH value of construction back putty layer is near neutral) and preparation method thereof.
The present invention realizes by following technical scheme:
A kind of neutral water proof putty cream, described putty paste are by comprising following raw material and the mixture of making according to the following portions by weight ratio:
Water 18-25 part
Sterilant 0.1-0.3 part
Defoamer 0.1-0.3 part
Film coalescence aid 0.5-1.5 part
Vltra tears 0.2-0.5 part
ACRYLIC EMULSION 7-20 part
Sodium bentonite 1-5 part
Water-ground limestone 60-80 part.
The sterilant that the present invention uses mainly is in order to prevent the infringement that is subjected to mould in storage process of putty paste, and described sterilant is preferably the isothiazolinone biocide agent;
The defoamer that the present invention uses mainly is to be used for suppressing the bubble that production process produces, and described defoamer is preferably the mineral oil origin defoamer;
The film coalescence aid that the present invention uses is that described film coalescence aid is preferably alcohol ester-12 for auxiliary ACRYLIC EMULSION film forming.
The Vltra tears that the present invention uses is organic thickening agent, mainly play the water-keeping thickening effect, prolong putty layer time of drying, help film forming, improve application property thereby keep putty moisture content to prolong the engineering time, it is 5~100,000 Vltra tears that described Vltra tears is preferably viscosity.
The topmost effect of described ACRYLIC EMULSION is as filmogen, is wrapped in the mineral powder surface, relies on the water tolerance of self after its film forming to realize the water resistance of putty layer.Described ACRYLIC EMULSION is preferably solid content greater than 45%, and second-order transition temperature is vinylbenzene and the acrylate copolymer emulsion between 20~30 ℃, and higher second-order transition temperature is its assurance with excellent water resistance.
The sodium bentonite that the present invention uses has extremely strong water-retentivity, prevent to emanate in the putty paste storage process, owing to self have swelling property, cause putty paste to have good thixotropy, stationary state is difficult for flowing, but but very smooth during blade coating, help to improve workability, it is sodium bentonite between 250~400 orders that described sodium bentonite is preferably the order number.
It then is main filler that the present invention uses water-ground limestone, and described water-ground limestone is preferably whiteness greater than 90, and fineness is greater than 325 purpose water-ground limestones.
The present invention also provides the preparation method of above-mentioned putty paste:
Add sterilant, defoamer, film coalescence aid, ACRYLIC EMULSION in water after, add sodium bentonite and water-ground limestone under agitation condition, the aqueous solution that adds Vltra tears at last carries out thickening, gets final product discharging after mixing.
The beneficial effect that the present invention had is:
The invention provides a kind of neutral water proof putty cream.This putty paste can reach the index that building trade standard JC/T 3049-1998 architecture indoor requires with putty (N type) fully on performance.And owing to do not use inorganic coagulation material to realize water tolerance, thereby the putty layer after the construction shows as neutrality, compares with traditional water proof putty, and it is short to have curing cycle, easily polishing, and and characteristics such as the compatibility of emulsion paint is good.Paste putty can directly be criticized and scrape easy construction.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
Embodiment 1
The present invention is that the preparation of raw material by following weight forms: 18 parts in water, 0.2 part in sterilant, 0.2 part of defoamer, 1 part of film coalescence aid, 0.3 part of Vltra tears, 15 parts of ACRYLIC EMULSION, 4.3 parts of sodium bentonites, 61 parts of water-ground limestones.
Embodiment 2
The present invention is that the preparation of raw material by following weight forms: 25 parts in water, 0.2 part in sterilant, 0.2 part of defoamer, 0.5 part of film coalescence aid, 0.4 part of Vltra tears, 7 parts of ACRYLIC EMULSION, 1.7 parts of sodium bentonites, 65 parts of water-ground limestones.
Embodiment 3
The present invention is that the preparation of raw material by following weight forms: 22 parts in water, 0.2 part in sterilant, 0.2 part of defoamer, 0.8 part of film coalescence aid, 0.3 part of Vltra tears, 10 parts of ACRYLIC EMULSION, 3.5 parts of sodium bentonites, 63 parts of water-ground limestones.
The above only is preferred embodiment of the present invention, is not technical scheme of the present invention is done any pro forma restriction.Every foundation technical spirit of the present invention all still belongs in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did.