CN105884250B - A kind of protective polymer decorates rubber cement - Google Patents
A kind of protective polymer decorates rubber cement Download PDFInfo
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- CN105884250B CN105884250B CN201610205978.0A CN201610205978A CN105884250B CN 105884250 B CN105884250 B CN 105884250B CN 201610205978 A CN201610205978 A CN 201610205978A CN 105884250 B CN105884250 B CN 105884250B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
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- Ceramic Engineering (AREA)
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of protective polymers to decorate rubber cement, and component includes according to the mass fraction：6.0~12.0 parts of ester alcohol, 3.5~6.0 parts of cellulose ether, 1.5 parts of mould inhibitor, 1.0~2.0 parts of ammonium hydroxide, 2.0~3.0 parts of dispersant, 12.0~16.0 parts of propylene glycol, 1.5 parts of antifoaming agent, 0.2~1.2 part of wood fibre, 450.0~600.0 parts of quartz sand, 200.0~300.0 parts of silica flour；It further includes 100.0~150.0 parts of water and accounts for the polyacrylate dispersion of gross mass 14%~16%, polyacrylate dispersion is formed by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters lotion blending.The present invention can effectively solve the problem that various performances and construction problem present in existing polyalcohol cement basis or polymer emulsion powder type finishing mucilage.
Description
Technical field
The present invention relates to exterior wall heat-preserving system field more particularly to a kind of protective polymer decoration rubber cements.
Background technology
Exterior insulation system for polyphenyl plate thin plastering exterior wall be China is most widely used at present, exterior-wall heat insulation that application amount is maximum every
Thermal technology.For the difference of thermal insulation board species, the exterior insulation system for polyphenyl plate thin plastering exterior wall that China uses at present has molding
Two kinds of systems of styrofoam and extruded polystyrene board.It is more extensive wherein to mold the application of exterior insulation system for polyphenyl plate thin plastering exterior wall,
In contrast, thinly plastered external wall of extruded polystyrene board outer heat preservation system wants much less, but there is the trend gradually increased.
For the difference of finishing mucilage, exterior insulation system for polyphenyl plate thin plastering exterior wall has polyalcohol cement basis finishing mucilage
With two kinds of polymer emulsion type finishing mucilage.The advantage of polyalcohol cement basis finishing mucilage is to have both organic material and inorganic material
The double dominant of material, for example, it is water-fast, durability is good etc..But there is also apparent performances for polyalcohol cement basis finishing mucilage
First, alkalescence is high, serious corrosiveness is generated to alkali-resisting glass fiber screen cloth therein for deficiency；Second is that easily " accumulation of salt in the surface soil ", destroy dress
Adorn effect；Third, most serious, since the deficiency of polymers compositions is often that rigidity is had a surplus and flexible deficiency.Just because of polymerization
These proper property defects of object cement-base plastering rubber cement result in many exterior insulation engineerings at present and occur splitting, blend painting
" accumulation of salt in the surface soil " phenomenon of film facing seriously affects decorative effect and reduces heat-insulating property.
Finishing mucilage (including the adhesive) almost all used at present in China's thin-coat plaster class external thermal insulation system is
Polymer-modified cement-based pulverulent material.Wherein, polymers compositions is latex powder.Latex powder is that organic monomer gathers through Over emulsfication
After conjunction obtains polymer emulsion, the anti-blocking agent powder product as obtained from spray drying again is added in, due to processed complex, is added
Energy consumption during work is big, high processing costs, thus its cost is approximately twice of polymer emulsion, and in a series of processing
The partial properties of polymer is made to incur loss in the process.In order to reduce the production cost of finishing mucilage, the use of latex powder therein
Amount is extremely restricted, and the additive amount of latex powder will become lower in the case of Market competition.What is more, when
Using secondary operation so-called " multifunction emulsion powder " when product quality can then become worse (in the case of in this in finishing mucilage
The additive amount of latex powder even can be less to ignoring).
The mainly organic polymers compositions of cracking resistance effect can be generated in finishing mucilage, thus when latex powder is added
When amount is very low, the cracking resistance effect of finishing mucilage will substantially reduce, and can not meet external thermal insulation system and finishing mucilage is resisted
Split performance requirement.
For this purpose, the non-cement of polymer emulsion type is used to the insulation layer surface of exterior insulation system for polyphenyl plate thin plastering exterior wall
Base (or referred to as polymer matrix) finishing mucilage.Non-cement-based finishing mucilage has very excellent elongation percentage, durability and resistance to
Hou Xing does not contain the overbasic rigid material such as cement, therefore the flexibility that imparting system is excellent, can resist the violent temperature difference
Variation.Simultaneously have water resistance excellent, impact resistance is splendid, to alkali-resisting glass fiber screen cloth almost without damage and finish coat without
The advantages such as any " accumulation of salt in the surface soil " possibility, can successfully solve some defects existing for polyalcohol cement basis finishing mucilage, become
One developing direction of high-end outer heat preservation system.
Further, since styrofoam belongs to organic combustible material, fire protecting performance is poor, occurs fire once in a while in construction period, has
The great attention for causing serious consequence, causing industry already, and research and develop series of new techniques or the structure in system therefrom
It makes aspect and takes the measure that fire-blocking belt is set.
Polymer matrix (non-cement-based) finishing mucilage than cement base products have many advantages, " polymer can be solved
Many problems that cement " base finishing mucilage generates.But the purpose for releasing this kind of product to market at present is to sell latex
Powder, and latex powder class non-cement-based polymer finishing mucilage is high there is also water absorption, water resistance is bad, the anti-impact after water resistant test
The problems such as hit intensity significantly reduces.Meanwhile the workability of this finishing mucilage is sometimes there is also problem, such as criticize apply it is viscous,
Fast drying etc. brings difficulty to construction.Thus, since some external major companies in 2009 since China promotes this system
Never obtain practical application.
The content of the invention
The purpose of the invention is to provide a kind of protective polymer decoration rubber cement, solve existing polyalcohol cement basis or
Various performances and construction problem present in person's polymer emulsion powder type finishing mucilage.
The technical solution adopted by the present invention to solve the technical problems is：A kind of protective polymer decorates rubber cement, component
Include according to the mass fraction：6.0~12.0 parts of ester alcohol, 3.5~6.0 parts of cellulose ether, 1.5 parts of mould inhibitor, ammonium hydroxide 1.0~2.0
Part, 2.0~3.0 parts of dispersant, 12.0~16.0 parts of propylene glycol, 1.5 parts of antifoaming agent, 0.2~1.2 part of wood fibre, quartz sand
450.0~600.0 parts, 200.0~300.0 parts of silica flour；Further include 100.0~150.0 parts of water and account for gross mass 14%~
16% polyacrylate dispersion, polyacrylate dispersion are spelled by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters lotion
It is mixed to form.
Preferably, polyacrylate dispersion is by 996 styrene-propene of 2438 elastic emulsions of Primal and Primal AC
Acid esters copolymer emulsion blending forms.
Further, the spelling of 996 interpolymer latex of polystyrene and acrylic ester of 2438 elastic emulsions of Primal and Primal AC
Mixed ratio is 5.5~4.0:4.5~6.0.
Preferably, polyacrylate dispersion is by 2438 type elastomeric polypropylenes acid esters lotions of Primal and Primal AC-
The two kinds of lotion blending of 398A type polyacrylate dispersions forms.
Further, 2438 type elastomeric polypropylenes acid esters lotions of Primal and Primal AC-398A types polyacrylate breast
The blending ratio of liquid is 5.5~4.0:4.5~6.0.
Preferably, fibre length for length below 1mm staple fiber.
Preferably, cellulose ether is M30 type Bermocoll high-viscosity cellulose ethers, and ester alcohol is Texanol ester alcohol mould inhibitors
For A20 type mould inhibitors, dispersant is " fast easy " dispersant, and antifoaming agent is 921 antifoaming agent.
Preferably, the grain size of quartz sand is 0.1mm~0.6mm, and the fineness of silica flour is 100 mesh.
In order to directly add weather-proof color wherein, colour and the decoration type plastering glue with facing is made
Slurry, this protective polymer decoration rubber cement further include the pigment or dispersible pigment color paste of good weatherability.
In the case where keeping polyacrylate dispersion that there is basic dosage, by adjusting consolidating for this protective polymer rubber cement
Body content can very easily keep ARS rubber cements to have good initial dry cracking resistance；This protective polymer decoration rubber cement
Solid content accounts for the 65%~75% of gross mass.
Beneficial effects of the present invention：1. barrier propterty is strong：Common cement base is replaced with this protective polymer decoration rubber cement
Thin finishing mucilage can eliminate cracking, the infiltration phenomenon of current external insulating system for thinly plastered external wall generally existing, so as to generate more
Good protective action.2. solve the problems, such as finish coat " accumulation of salt in the surface soil ", yellowing：Alkalescence is not both contained in this protective polymer decoration rubber cement
Substance, and with extraordinary impermeability, because may be not present conventional cement base finishing mucilage it is general subtract, the possibility of yellowing, energy
It is enough thoroughly to eliminate " accumulation of salt in the surface soil " phenomenon, it ensure that the decorative effect of external thermal insulation system.It is protected 3. alleviating outside thin-coat plaster class exterior wall
The dead weight of warm system：Rubber cement is decorated using this protective polymer, makes protection with decoration integrated, thin-coat plaster layer can be thinned,
It is possible thereby to make weight reduction (3~5) kg/m2 of system, make the safety of structure of system is opposite to enhance.It is protected 4. simplifying outside exterior wall
The construction of warm system：Finish coat can be eliminated due to the use of this protective polymer decoration rubber cement, protects and decoration integrated, makes
The construction of external thermal insulation system simplifies, and reduces the interface between structure sheaf, enhances structural stability, while also shorten and apply
The work duration.
Below with reference to embodiment, the present invention is described in detail.
Specific embodiment
Embodiment 1, a kind of protective polymer decorate rubber cement, and component includes according to the mass fraction：6.0 parts of ester alcohol, fiber
Plain 3.5 parts of ether, 1.5 parts of mould inhibitor, 1.0 parts of ammonium hydroxide, 2.0 parts of dispersant, 12.0 parts of propylene glycol, 1.5 parts of antifoaming agent, wood fibre
0.2 part, 450.0 parts of quartz sand, 200.0 parts of silica flour,；It further includes 100.0 parts of water and accounts for 14% polyacrylate of gross mass
Lotion, polyacrylate dispersion are formed by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters lotion blending.
Embodiment 2, a kind of protective polymer decorate rubber cement, and component includes according to the mass fraction：Polyacrylate dispersion
300.0 parts, 12.0 parts of ester alcohol, 6.0 parts of cellulose ether, 1.5 parts of mould inhibitor, 2.0 parts of ammonium hydroxide, 3.0 parts of dispersant, propylene glycol 16.0
Part, 1.5 parts of antifoaming agent, 1.2 parts of wood fibre, 600.0 parts of quartz sand, 300.0 parts of silica flour；It further includes 150.0 parts of water and accounts for
16% polyacrylate dispersion of gross mass, polyacrylate dispersion is by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters
Lotion blending forms.
Embodiment 3, a kind of protective polymer decorate rubber cement, and component includes according to the mass fraction：Polyacrylate dispersion
250.0 parts, 9.0 parts of ester alcohol, 4.0 parts of cellulose ether, 1.5 parts of mould inhibitor, 1.5 parts of ammonium hydroxide, 2.5 parts of dispersant, propylene glycol 14.0
Part, 1.5 parts of antifoaming agent, 0.7 part of wood fibre, 525.0 parts of quartz sand, 250.0 parts of silica flour；It further includes 125.0 parts of water and accounts for
15% polyacrylate dispersion of gross mass, polyacrylate dispersion is by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters
Lotion blending forms.
Embodiment 4, on the basis of embodiment 1 to 3, polyacrylate dispersion by 2438 elastic emulsions of Primal and
996 interpolymer latex of polystyrene and acrylic ester blendings of Primal AC form.2438 elastic emulsions of Primal and Primal AC
The blending ratio of 996 interpolymer latex of polystyrene and acrylic ester is 5.5~4.0:4.5~6.0.
Embodiment 5, on the basis of embodiment 1 to 3, polyacrylate dispersion is by 2438 type elastomeric polypropylenes of Primal
Acid esters lotion and the two kinds of lotion blending of 996 interpolymer latex of polystyrene and acrylic ester of Primal AC form.Primal
2438 type elastomeric polypropylenes acid esters lotions and the blending ratio of 996 interpolymer latex of polystyrene and acrylic ester of Primal AC are 5.5
~4.0:4.5~6.0.
Embodiment 6, on the basis of embodiment 1 to 5, fibre length for length below 1mm staple fiber.Cellulose
Ether is M30 type Bermocoll high-viscosity cellulose ethers, and ester alcohol is that Texanol ester alcohol mould inhibitors are A20 type mould inhibitors, dispersant
For " fast easy " dispersant, antifoaming agent is 921 antifoaming agent.The grain size of quartz sand is 0.1mm~0.6mm, and the fineness of silica flour is 100
Mesh.The additive amount of water controls the solid content of this protective polymer decoration rubber cement to account for the 65%~75% of gross mass, this polymer
Protected decoration rubber cement further includes the pigment or dispersible pigment color paste of good weatherability.
In the selection of material, Rhom and Hass of U.S. production Primal 2438 type elastomeric polypropylenes acid esters breasts can be selected
Liquid, Primal AC-398A type polyacrylate dispersions；Eastman company of the U.S. produces Texanol ester alcohols；Akzo Nobel produces
M30 type Bermocoll high-viscosity cellulose ethers；German Shu Mei companies produce A20 mould inhibitors；SILVER REAGENT ammonium hydroxide；Commercially available quartz sand is (thin
Spend 0.1mm~0.5mm)；Commercially available silica flour (100 mesh), Shanghai Si Nuo Chemical Co., Ltd.s produce 921 antifoaming agent；Shanghai iron of fine quality source
Work Science and Technology Ltd. supplies putty Special wooden fiber.
In the manufacturing process of this protective polymer decoration rubber cement, by water, mould inhibitor, propylene glycol, Texanol ester alcohols, " fast
Easily " dispersant, ammonium hydroxide and proper quantity of defoaming agent etc. are uniformly mixed in mixing tank, after mixed slurry is made, in the shape of stirring at low speed
Polyacrylate dispersion is added under condition and is stirred evenly, and adjusts pH value again to 8.5~9.0.Then, filler (stone is put into
Sand, powder, pigment etc.) it stirs evenly.Most backsight ARS protective polymers decoration rubber cement in foam number, be supplemented antifoaming agent,
Stirring defoaming.
The properties of this protective polymer decoration rubber cement are described in detail according to result of the test below：
1. the selection of polyacrylate dispersion
It is generally used for the cream such as exterior wall true stone paint, the film forming matter of pasty products is polyacrylate dispersion.Polymer cement
Sill can be cream, pasty products or powder product.Polymer for cream, polymer paste cement-based material is also
Polyacrylate dispersion；What it is for powdery polymer cement-based material is VAE class latex powders.Exterior wall true stone paint polyacrylate
Lotion is the higher lotion of glass transition temperature, and fracture elongation is very low, does not possess the flexibility requirements of finishing mucilage；For polymerizeing
The polyacrylate dispersion of object cement-based material is specific to the material of modified cement, and glass transition temperature is relatively low, is used alone
Shi Xingneng is bad, it is impossible to be individually used for exterior wall.Thus, in order to meet the comprehensive performance requirement of this protective polymer decoration rubber cement,
We have selected the method for using common and elastic two kinds of polyacrylate dispersion blendings, but the two should have proper ratio
Example, the result of the test carried out therefore are as shown in table 3.
Influence of the 3 different proportion lotion blending of table to this protective polymer decoration rubber cement performance
| Blending ratio① | Tensile bond strength (MPa) | Tensile strength (MPa) | Elongation at break (%) |
| 10∶0 | 0.36 | 2.21 | 362 |
| 8.5∶1.5 | 0.63 | 2.13 | 330 |
| 7.0∶3.0 | 0.97 | 1.95 | 260 |
| 5.5∶4.5 | 1.32 | 1.80 | 114 |
| 4.0∶6.0 | 1.67 | 1.77 | 103 |
Note：1. lotion blending is 2438 elastic emulsion Primal AC-398A type polyacrylate dispersions of Primal.
Energy when preparing this protective polymer decoration rubber cement using elastic building emulsion according to obtained results showed that
Good tensile strength and elongation at break are accessed, but it is very poor to the adhesive property of base, two kinds of lotion blendings are used into energy
Enough make up this deficiency.Two kinds of lotion blendings are in use, blending ratio with Primal AC-398A type polyacrylate dispersions
Example increase so that this protective polymer, which decorates rubber cement, improves the adhesive property of base, but its tensile strength and elongation at break
It decreases, the amplitude that especially elongation at break reduces is very big.Thus, in order to make this protective polymer decoration rubber cement that there is institute
Elastic building emulsion and common building lotion with the way that proper ratio blending uses are practical by the flexibility needed
's.Especially common building lotion is interpolymer latex of polystyrene and acrylic ester, and cost was both low, and water resistance compares polyacrylic acid again
Ester lotion is more preferable.But when selecting two kinds of lotions, it should be noted that the compatibility of two kinds of lotions especially carries out before the use
Compatibility test is verified.Primal AC-398A types polyacrylate dispersion can use 996 styrene-the third of Primal AC
Olefin(e) acid ester copolymer emulsion substitutes, the effects of Primal AC-398A type polyacrylate dispersions than 996 styrene of Primal AC-
Acrylate copolymer emulsion is more preferable, and compare in 996 interpolymer latex of polystyrene and acrylic ester relative prices of Primal AC have it is excellent
Gesture.
By two kinds of lotion blendings with compatibility in use, understanding blending lotion to this polymerization except through testing above
Outside the influence of object protected decoration rubber cement mechanical property, in order to which the performance for ensureing this protective polymer decoration rubber cement is stablized, should also it survey
The glass transition temperature of two kinds of blending lotions is tried, and as the index of control product quality.In general, in order to ensure this polymer
Protected decoration rubber cement has preferable flexibility, its glass transition temperature should be not higher than 10 DEG C after two kinds of lotion blendings.
2. polyacrylate dispersion dosage is to this protective polymer decoration protective polymer decoration rubber cement tensile bond strength
Influence
(1) tensile bond strength between extruded polystyrene board
Polyacrylate dispersion is the film forming matter of this protective polymer decoration protective polymer decoration rubber cement, and dosage is shown
Writing influences a series of physical mechanical property and endurance quality of this protective polymer decoration rubber cement.But when material has preferable power
Can also have corresponding endurance quality in class hour, thus general Study is all that material is first made to have preferable mechanical property, because
The detection of mechanical property is more convenient, direct.Polyacrylate dispersion dosage gathers this protective polymer decoration rubber cement with extrusion molding
The influence of tensile bond strength is as shown in table 4 between benzene plate.
4 polyacrylate dispersion of table①It is strong that dosage decorates this protective polymer stretch-bonded between rubber cement and extruded polystyrene board
The influence of degree
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
2. water-fast intensity is immersion 48h, the proof strength after dry 7d.
As can be seen from Table 4, in this protective polymer decoration protective polymer decoration rubber cement proportioning, with polypropylene
The increase of acid esters lotion dosage, tensile bond strength uniformly improves between this protective polymer decoration rubber cement and extruded polystyrene board.
This explanation, in order to ensure that there is reliable adhesion strength, polypropylene between this protective polymer decoration rubber cement and extruded polystyrene board
Acid esters lotion is not lower than a certain minimum amount.Since polyacrylate dispersion is suitable in this protective polymer decoration rubber cement
The grain size and dosage of additive amount and filler are closely related, thus in the case where testing using material, this protective polymer decoration
The polyacrylate dispersion dosage of rubber cement is not lower than 14%.
(2) tensile bond strength between reinforced cement-mortar board
JG 149-2003 standards and GB 30595-2014 standards are all not specified by between finishing mucilage and reinforced cement-mortar board
Tensile bond strength because finishing mucilage surface need not bond cement mortar.But in order to investigate polyacrylate dispersion
Dosage is to the actual influence of this protective polymer decoration rubber cement, and still experiments are conducted on this for we, because preventing in this polymer
Between shield decoration rubber cement and extruded polystyrene board in the experiment of tensile bond strength, when this protective polymer decorates polypropylene in rubber cement
The actual change situation for not coming out adhesion strength is just examined in the increase of acid esters lotion dosage to a certain extent, and is simply examined at the trial
Test the destruction of extruded polystyrene board.
Polyacrylate dispersion dosage decorates tensile bond strength between rubber cement and reinforced cement-mortar board to this protective polymer
Influence it is as shown in table 5.
5 polyacrylate dispersion of table①It is strong that dosage decorates this protective polymer stretch-bonded between rubber cement and reinforced cement-mortar board
The influence of degree
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
2. water-fast intensity is immersion 48h, the proof strength after dry 7d.
As can be seen from Table 5, decorated in this protective polymer in rubber cement, the additive amount of polyacrylate dispersion to its with
Adhesion strength between reinforced cement-mortar board have a case that with extruded polystyrene board it is similar, i.e., before this with lotion additive amount be increase and
It gradually steps up, increases unobvious when reaching a certain level.
On the other hand, after water resistant test or freeze-thawing resistant experiment, although intensity decreases adhesion strength sample, but simultaneously
Unobvious, the water resistance of lotion is very good selected by explanation, and the reduction of intensity is also smaller after freeze-thawing resistant experiment, this also complies with some
The very strong rule of ability that organic resin class material is destroyed to bearing water logging erosion.
(3) polyacrylate dispersion dosage is to this protective polymer decoration protective polymer decoration rubber cement compression shear adhesion strength
Influence
Influence of the polyacrylate dispersion dosage to this protective polymer decoration rubber cement compression shear adhesion strength is as shown in table 6.
6 polyacrylate dispersion of table①Influence of the dosage to compression shear adhesion strength
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
2. water-fast intensity is immersion 48h, the proof strength after dry 7d.
As can be seen from Table 6, polyacrylate dispersion dosage decorates rubber cement compression shear adhesion strength to this protective polymer
Influence have the relation and numerical value similar with adhesion strength.
3. influence of the polyacrylate dispersion dosage to this protective polymer decoration protective polymer decoration rubber cement water absorption
Water absorption is one of important embodiment index of finishing mucilage barrier propterty, thus we have also prepared polyacrylate
Different this protective polymer decorating glue slurry samples of lotion dosage, to investigate shadow of the polyacrylate dispersion dosage to its water absorption
It rings.Result of the test is as shown in table 7.
7 polyacrylate dispersion of table①Influence of the dosage to this protective polymer decoration rubber cement water absorption
| Polyacrylate dispersion dosage (quality %) | Water absorption (g/m2) |
| 10.0 | 279 |
| 12.0 | 201 |
| 14.0 | 151 |
| 16.0 | 135 |
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
Result explanation in table 7, when polyacrylate dispersion dosage is 10%, this protective polymer decorates the suction of rubber cement
Water is 279g/m2；For 14% when be 151g/m2, it is seen that this protective polymer decoration rubber cement water absorption it is relatively low, this be exactly have
The inherent characteristic and polymer matrix finishing mucilage of machine material are better than one of characteristic of cement-base plastering rubber cement.
4. the research pair this protective polymer decoration rubber cement impact strength
Impact strength is all important property for decorating rubber cement and External Thermal Insulation Composite Systems to this protective polymer
It can index.Common polyalcohol cement basis finishing mucilage (i.e. current powder product) is using high quality latex powder and is having
In the case of enough additive amounts, enhanced using individual layer alkali-proof glass fiber mesh and after 28d standard curings, shock resistance
Intensity is generally 3J~8J, and after complete aquation of generally soaking, and it is even lower that the flexibility of rubber cement drops to 3J.
Polyacrylate dispersion dosage is shown in Table the influence result of the test of this protective polymer decoration rubber cement impact strength
8.Numerical value in table is using the enhancing of individual layer alkali-proof glass fiber mesh, this protective polymer decoration mucilage layer thickness 3mm feelings
Result under condition.
8 polyacrylate dispersion of table①Influence of the dosage to this protective polymer decoration rubber cement impact strength
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
In table 8, the impact strength after immersion refers to that test specimen soaks the experiment knot after 7d, re-dry 7d after 14d is conserved
Fruit.As can be seen from Table 8, even if in the case where polyacrylate dispersion dosage is down to 10%, the shock resistance of finishing mucilage
Intensity also reaches 12J.And with the raising of polyacrylate dispersion dosage, impact strength can reach more than 20J, even
Test specimen after water resistant test, impact strength are also up to 16J.As it can be seen that compared with common polyalcohol cement basis finishing mucilage,
The basic protective polymer decoration rubber cement of polymer has extraordinary shock resistance.This is such finishing mucilage with good soft
Toughness has an embodiment.On the other hand, this protective polymer decoration protective polymer decorates rubber cement after the 7d re-dries 7d that soaks
Still very high impact strength is retained, it is excellent that this has absolutely proved that this protective polymer decoration protective polymer decoration rubber cement has
Different long-term flexibility and shock resistance.
5. improve the research of this protective polymer decoration rubber cement drying property
In polyalcohol cement basis finishing mucilage, since the dosage of cement is very big, and hydrated cementitious needs to consume its own
The water of weight 25% or so, and intensity constantly increases after its initial set.Thus, except (such as low in the low temperature that should not be constructed
In 5 DEG C) in the case of drying time it is longer and cannot meet the requirements it is outer, there is usually no drying it is slow the problem of, and even if not
Construct in the case of the low temperature preferably constructed, can by improve cement-based material condensation hardening and gain in strength speed come very square
Just solution it.But for moisture evaporation, polymer particles is leaned on to be deformed coalescing and the polymer matrix of drying and forming-film completely
For finishing mucilage, it is exactly the important technology in its practical application to solve the problems, such as its drying.
This is because the water evaporation rate in this protective polymer decoration rubber cement is very big to the dependence of air humidity,
Such as when air humidity is big, i.e., rainy season construction synthetic resin emulsion sand textured coating (decorates rubber cement with this protective polymer
It is made of similar) when, dry problem can usually influence the construction quality of coating, this is the proper property of this kind of material, usually only
It can be by giving in work progress note that being solved in itself from material there is presently no method.Another problem is summer gas
When temperature is higher, air humidity is smaller, surface layer and internal dehydration may be caused not because dry very fast when this kind of material is constructed
Unanimously, make surface layer dry first, form one layer of densification and fluid-tight surface layer film and blocked the evaporation of internal moisture, influence
To the actual drying of material.It takes measures to solve for this problem needs.The method that we take is that addition can be to drying
Performance generates the wood fibre for the effect that significantly improves.
The principle that wood fibre improves polymer matrix finishing mucilage is played since fiber can generate capillary effect
Architecture, and it is more uniformly distributed the drying process of material system due to generation is ventilative, avoid the decoration plastering of this protective polymer
Mucilage layer influences actual drying phenomenon when constructing in high temperature drying season due to drying is too fast causes surface skining.
(1) influence of the wood fibre to this protective polymer decoration rubber cement drying property
The result of the test that wood fibre influences this protective polymer decoration rubber cement drying property is shown in Table 9.Result in table
Experimental condition is：This protective polymer decoration mucilage layer thickness is 3mm；40 DEG C of dry environment temperature；Dry environment relative humidity
25%；Drying is accelerated with the wind-force of 3m/s flow velocitys.
Influence of the 9 wood fibre dosage of table to this protective polymer decoration rubber cement drying property
It can be seen that from the result of the test in table 9 in the case where accelerating drying test, the addition of wood fibre can be bright
The aobvious drying property for improving this protective polymer decoration rubber cement, and with the increase of wood fibre additive amount, this protective polymer
The drying time of decoration rubber cement is shortened, and inside and outside drying reaches unanimity.
(2) influence of the wood fibre to this protective polymer decoration rubber cement water absorbing properties
Water absorption rate is also the important performance indexes of this protective polymer decoration mucilage layer, since wood fibre has similar hair
The Water conductance of capillary action, thus it uses the water absorption rate that may increase this protective polymer decoration mucilage layer.But it tries
Verify the addition of bright wood fibre to the influence very little of this protective polymer decoration mucilage layer water absorption rate, result of the test such as table 10
It is shown.In table 10, wood fibre is only under 3% additive amount, and the water absorption rate of this protective polymer decoration mucilage layer is
It is high by about 0.3% during than not adding.
Influence of the 10 wood fibre dosage of table to this protective polymer decoration rubber cement water absorption rate
Note：Wood fibre 1 is the shorter product of fibre length；Wood fibre 2 is the longer product of fibre length.
Wood fibre is can be seen that from the result of the test in table 10, and rubber cement is decorated almost without apparent to this protective polymer
Harmful effect.When the additive amount of wood fibre is up to 3%, the water absorption rate of this protective polymer decoration rubber cement is all without apparent
Improve, this is because when this protective polymer decorate rubber cement film forming is fully cured after, due to polyacrylate dispersion it is excellent into
Film properties and the film forming good physical and mechanical property of rear film so that wood fibre, in closed state, eliminates in film layer
Harmful effect to water absorption rate.
It should be noted that the staple fiber that should select fibre length in below 1mm when selecting wood fibre, and also tackle additive amount
It is limited, because long fibre the appearance of mucilage layer can be decorated to this protective polymer and adhesive property generates harmful effect.
6. the research pair this protective polymer decoration rubber cement workability
For practical angle, workability is one of important performance of this protective polymer decoration rubber cement.This polymerization
Object protected decoration rubber cement mainly takes spraying and trowel trowelling two ways to construct.Both construction methods are to this protective polymer
The workability requirement for decorating rubber cement is different.
Requirement of the spraying application to this protective polymer decoration rubber cement application property is that should have preferable cohesiveness and anti-current
Extension property, this can be by the hydroxyethyl cellulose product that selects viscosity model moderate, and is met the requirements by properly increasing dosage.
Requirement of the trowelling construction to this protective polymer decoration rubber cement application property is that should have preferable thixotropy, during trowelling
It is smooth and without viscous sense, this can be met the requirements by the hydroxyethyl cellulose product for selecting viscosity model higher.
Since experiment is since experienced construction personnel carries out practice of construction inspection, thus apply spraying application and trowelling
This protective polymer decoration rubber cement of work is respectively provided with good workability, and the application property met when building site is largely constructed will
It asks.
7. the research to the decorative energy of this protective polymer decoration rubber cement
This protective polymer decorates rubber cement due to the polyacrylate dispersion using high water-fast and high durable, can be into
Row is mixed colours directly as decorative layer, and this decorative layer may be generally referred to as texture coating, be referred to as polymeric trim sand
It starches (or facing mortar).
This protective polymer decoration rubber cement is the material with protection and decoration dual function, thus dicoration is that its is important
Performance indicator.The research of performance is decorated for it should be according to the requirement of decorative material (such as lacquer), as initial stage drying is anti-
Fragility, abrasion resistance and stain resistance etc..In order to ensure the decoration performance of this protective polymer decoration rubber cement, we are respectively to this
Several performances are studied.
(1) influence of this protective polymer decoration rubber cement solid content to initial dry cracking resistance
The result of the test that polyacrylate dispersion dosage influences this protective polymer decoration rubber cement initial dry cracking resistance
It is shown in Table 11.
Influence of the 11 protective polymer decoration rubber cement solid contents of table to initial dry cracking resistance
As the coatings such as lacquer, the initial stage season cracking of this protective polymer decoration mucilage layer is due to its formula group
Low into middle solid content, fluid loss is excessive and cause volume contraction in the drying process, when shrinkage stress is prevented more than this polymer
Cracking phenomenon during the tensile strength of shield decoration mucilage layer.
Result of the test in table 11 is consistent with this Cracking Mechanism, i.e., decorates rubber cement solid content in this protective polymer
In the case of very low, initial dry cracking resistance can be poor, and more hair check occurs in test plate (panel) surface；And when solid content improves
During to 60%, test plate (panel) is in addition to corner, basic flawless.As it can be seen that there is basic dosage in holding polyacrylate dispersion
Under, by adjusting the solid content of this protective polymer decoration rubber cement, it can very easily keep this protective polymer decorating glue
Slurry has good initial dry cracking resistance.
(2) influence of the polyacrylate dispersion dosage to this protective polymer decoration rubber cement wash-resistant property
The result of the test that polyacrylate dispersion dosage influences this protective polymer decoration rubber cement wash-resistant property is shown in Table
12。
12 polyacrylate dispersion of table①Influence of the dosage to this protective polymer decoration rubber cement abrasion resistance
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
Test result in table 12 shows that this protective polymer decoration rubber cement has extraordinary wash-resistant property.Even if
In the case of lotion dosage is less than 12%, after 2000 times are scrubbed, mass loss is also only 0.16g.This is because due to
The two kinds of polyacrylate dispersion blending of Primal 2438 and Primal AC-398A of good performance has been selected to use,
Make this protective polymer decoration mucilage layer that there is very high cohesive strength, thus the ability for bearing to scrub destruction is stronger, shows
Be exactly that abrasion resistance is good in result of the test, be subjected to 2000 times scrub experiment after almost without mass loss.
(3) influence of the polyacrylate dispersion dosage to this protective polymer decoration rubber cement stain resistance
Influence the grain because being known as polyacrylate dispersion dosage and sand grains of this protective polymer decoration rubber cement stain resistance
Footpath etc., but due to consideration that the sand grains used in research process is thinner, and trowelling may be used to construct in practical engineering application
It is more, thus the main influence for having investigated polyacrylate dispersion dosage to this protective polymer decoration rubber cement stain resistance, because
Pressure effect is smeared due to trowel when constructing for trowelling so that influence of the sand grains grain size to stain resistant unobvious.Polyacrylate
The result of the test that lotion dosage influences this protective polymer decoration rubber cement stain resistance is listed in table 13.Stain resistance experiment according to
JG/T 24—2000《SAND SLURRY SYNTHETIC EMULSION ARCHITECTURAL COATINGS》Defined method carries out.
13 polyacrylate dispersion of table①Influence of the dosage to this protective polymer decoration rubber cement stain resistance
| Polyacrylate dispersion dosage (quality %) | Stain resistance result (grade) |
| 10 | 3 |
| 12 | 2 |
| 14 | 1 |
| 16 | 1 |
Note：1. polyacrylate dispersion is made by the two kinds of lotion blendings of Primal 2438 and Primal AC-398A
With.
It is decorated in this protective polymer in rubber cement, when polyacrylate dispersion dosage is 10%, this protective polymer dress
The stain resistance of rubber cement is adornd as 3 grades, illustrates that the sand grains in this protective polymer decoration mucilage layer surface may also be enough to influence
Stain resistance, but when polyacrylate dispersion dosage further increases, this protective polymer decorates the stain resistance of rubber cement
Improved.This illustrates the polyacrylate dispersion film of this protective polymer decoration mucilage layer surface aggregated sufficient amount, from
And good effect is generated to the stain resistance of this protective polymer decoration mucilage layer.
(4) the anti-yellowing property analysis of this protective polymer decoration rubber cement
The two kinds of this kind of elastic emulsion paints of polyacrylate dispersion blending of Primal 2438 and Primal AC-398A
Yellowing resistance it is fine, 500h artificial ageing resistances experiment after value of chromatism (△ E) be respectively less than 1.It can from this empirical analysis
Know that this protective polymer decoration rubber cement there can be good yellowing resistance.
Meanwhile the Master Cost of this protective polymer decorative layer than it using lacquer as the thin plastering of the cement base of finish coat
Layer can reduce by 4.1 yuan of Master Cost；During than it using common external wall elastic emulsion paint as finish coat, every square metre can subtract
Master Cost 2.3 yuan few.
Claims (9)
1. a kind of protective polymer decorates rubber cement, it is characterised in that：Its component includes according to the mass fraction：Ester alcohol 6.0~12.0
Part, 3.5~6.0 parts of cellulose ether, 1.5 parts of mould inhibitor, 1.0~2.0 parts of ammonium hydroxide, 2.0~3.0 parts of dispersant, propylene glycol 12.0
~16.0 parts, 1.5 parts of antifoaming agent, 0.2~1.2 part of wood fibre, 450.0~600.0 parts of quartz sand, silica flour 200.0~
300.0 part；It further includes 100.0~150.0 parts of water and accounts for the polyacrylate dispersion of gross mass 14%~16%, polyacrylate
Lotion is formed by plain polypropylene acid esters lotion and elastomeric polypropylenes acid esters lotion blending.
2. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：Polyacrylate dispersion is by Primal
2438 elastic emulsions and 996 interpolymer latex of polystyrene and acrylic ester blendings of Primal AC form.
3. protective polymer according to claim 2 decorates rubber cement, it is characterised in that：Primal2438 elastic emulsions and
The blending ratio of 996 interpolymer latex of polystyrene and acrylic ester of Primal AC is 5.5~4.0:4.5~6.0.
4. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：Polyacrylate dispersion is by Primal
2438 type elastomeric polypropylenes acid esters lotions and the two kinds of lotion blending of Primal AC-398A type polyacrylate dispersions and
Into.
5. protective polymer according to claim 4 decorates rubber cement, it is characterised in that：2438 types of Primal elasticity poly- third
Olefin(e) acid ester lotion and the blending ratio of Primal AC-398A type polyacrylate dispersions are 5.5~4.0:4.5~6.0.
6. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：Fibre length is being length in 1mm
Following staple fiber.
7. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：Cellulose ether is M30 types
Bermocoll high-viscosity cellulose ethers, ester alcohol are that Texanol ester alcohol mould inhibitors are A20 type mould inhibitors, and dispersant is " fast easy " point
Powder, antifoaming agent are 921 antifoaming agent.
8. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：The grain size of quartz sand for 0.1mm~
0.6mm, the fineness of silica flour is 100 mesh.
9. protective polymer according to claim 1 decorates rubber cement, it is characterised in that：This protective polymer decoration rubber cement
Solid content accounts for the 65%~75% of gross mass, this protective polymer decoration rubber cement further includes the pigment or pigment colour of good weatherability
Slurry.
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| CN110105037A (en) * | 2019-04-04 | 2019-08-09 | 湖北汇林建材有限公司 | A kind of quick-dry type scene adds sand to reconcile self-leveling cement and its application method |
| CN111039647B (en) * | 2019-12-18 | 2022-07-15 | 浙江传化涂料有限公司 | Composite coating and wall surface construction method |
| CN111944373A (en) * | 2020-08-14 | 2020-11-17 | 赣州市犇牛防水建材有限公司 | High-elasticity anti-cracking leakage-repairing coating and preparation method thereof |
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