CN104140722B - The emulsion coatings formula that a kind of acicular wollastonite is filling-modified - Google Patents
The emulsion coatings formula that a kind of acicular wollastonite is filling-modified Download PDFInfo
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Abstract
The formula of the filling-modified emulsion coatings of a kind of acicular wollastonite, adds the acicular wollastonite filler of high length-diameter ratio in emulsion coatings, consisting of: (a) polymer emulsion, consumption is 35 40%；B () inorganic filler, consumption is 30 40%；C () thickening agent, consumption is 0 0.2%；D the () draw ratio acicular wollastonite more than 20:1, consumption is 4 10%；E () other auxiliary agents, consumption is 0 2%；F () pure water, consumption is 20 25%.The modified emulsion formulation for coating material of the present invention uses high length-diameter ratio acicular wollastonite that emulsion coatings is filled with modification, can be widely used in the emulsion coatingss such as polyurethane, polyvinyl acetate, polyacrylate, styrene-acrylic resin, on the premise of not changing the basic components of emulsion coatings, key property, production technology and production equipment, the thixotropic property of emulsion coatings is greatly improved, thus is effectively improved the processing of emulsion coatings, accumulating ability and brushing performance.
Description
Technical field
The present invention relates to the emulsion coatings of a kind of modification, particularly relate to the new formula of the filling-modified emulsion coatings of a kind of high length-diameter ratio acicular wollastonite.
Background technology
Thixotropy refers to that liquid can be become, from viscous pasty state, the state that mobility is bigger under shear action, and after shear action is cancelled, liquid returns to the performance of original viscous pasty state again.Thixotropy is the key factor determining coating quality.Good thixotropy can ensure that coating has relatively low viscosity, beneficially the carrying out of brushing work in painting process, it is possible to improves the levelability of coating, and after can also promoting coating application, the rapid of viscosity rises simultaneously, it is to avoid the generation of sagging phenomenon after brushing；And good thixotropy is conducive to coating to store and the stability in transportation.Therefore, the thixotropic property improving coating is to improve the important method of coating combination property.
Wollastonite is a kind anorthic system, the most in the form of sheets, radial or fibrous silicate crystal.Color is white, and band light gray, pale red tone, have glassy lustre sometimes.Wollastonite is widely used in the composite industry such as papermaking, pottery, cement and plastic, rubber.Wollastonite is also widely used in coatings industry as bulking agent.Acicular wollastonite (part commodity are also referred to as wollastonite fibre) is the one of wollastonite powder stuffing, also use is had in coatings industry, but it is the needle-like filler (its draw ratio is between 8:1 to 15:1) of common draw ratio, the thixotropic property of coating will not be produced impact.Therefore, acicular wollastonite never uses in coating or other industry as thixotropic agent.
High length-diameter ratio acicular wollastonite is the product occurred on market in recent years, its higher draw ratio has good strengthening action to rubber, thus be applied in rubber industry as rubber reinforcing filler, but the impact thixotropic on emulsion coatings of high length-diameter ratio acicular wollastonite then has no report.
Summary of the invention
It is an object of the invention to provide the emulsion coatings formula that a kind of acicular wollastonite is filling-modified, use high length-diameter ratio acicular wollastonite that emulsion coatings is filled with modification, the thixotropy of modified emulsion coating can be significantly improved, thus improve emulsion coatings storage and the stability of transport, improve brushing performance and the levelability of coating, reduce the generation of sagging.
It is an object of the invention to be realized by following measures:
The emulsion coatings formula that a kind of acicular wollastonite is filling-modified, it is characterised in that by weight percentage, be made up of following component:
A () polymer emulsion, consumption is 35-40%；
B () inorganic filler, consumption is 30-40%；
C () thickening agent, consumption is 0-0.2%；
D the () draw ratio acicular wollastonite more than 20:1, consumption is 4-10%；
E () other auxiliary agents, consumption is 0-2%；
F () pure water, consumption is 20-25%.
Polymer emulsion of the present invention is commercial polyurethane, polyvinyl acetate, polyacrylate or styrene-acrylic resin emulsion, and its solid content is 50 wt %-60wt%.
Inorganic filler of the present invention includes one or more in titanium dioxide, Pulvis Talci, calcium carbonate, lithopone, aluminium sesquioxide, silicon dioxide, is the conventional products of market sale.
Thickening agent of the present invention preferably is selected from sodium carboxymethyl cellulose or sodium lauryl sulphate, for the conventional products of market sale.
The present invention uses a kind of high length-diameter ratio acicular wollastonite as the thixotroping regulator in emulsion coatings formula, and described high length-diameter ratio acicular wollastonite can use the draw ratio acicular wollastonite more than 20:1 of market sale.Preferably draw ratio is the acicular wollastonite of 25-30:1.
Other auxiliary agents of the present invention include but not limited to, antifungus agent (such as penta sodium pentachlorophenate), defoamer (such as tributyl phosphate), one or more in pigment (such as phthalocyanine blue), are the auxiliary agent that the coating of market sale is conventional.
Applicant finds under study for action, and when draw ratio is more than 20:1, acicular wollastonite has, to the thixotropy of emulsion coatings, the effect of increasing significantly.The present invention, according to above-mentioned discovery, adds the draw ratio high length-diameter ratio acicular wollastonite more than 20:1 in emulsion coatings formula.After high length-diameter ratio acicular wollastonite adds coating, can be formed certain sterically hindered, avoid the reunion again of inorganic filler in coating, improve the rest viscosity of coating to a certain extent, thus effectively reduce coating generation of inorganic filler sedimentation in preparation and storage and transport process.And when applying coating after external force shears, high length-diameter ratio acicular wollastonite can make the shear viscosity of coating be decreased obviously rapidly along shear action direction ordered arrangement, thus is effectively improved the thixotropic property of coating, beneficially the brushing of coating and the raising of flow leveling.
In the present invention, the acicular wollastonite (draw ratio is more than 20:1) using high length-diameter ratio is key technology means therein.When the common acicular wollastonite using draw ratio less than 20:1, too short draw ratio makes this sterically hindered effect be difficult to embody, and the coating stability when preparation and accumulating cannot improve；And the coating dope viscosity that ordered arrangement causes under shear action decline phenomenon is the most inconspicuous, thus significantly improving of paint thixotropy cannot be realized.
The prioritization scheme of the present invention is: by the polymer emulsion 40g that solid content is 50-60wt %, 25g titanium dioxide, 5g calcium carbonate, 20g pure water, 0.5g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 9g draw ratio is the acicular wollastonite of 25:1, and said components is mixed and stirred for uniformly.Emulsion coatings prepared by this formula, due to the sterically hindered effect of high length-diameter ratio acicular wollastonite, makes coating have more preferable static stability, can be prevented effectively from coating generation of inorganic filler sedimentation in preparation and accumulating, improve stability and the time of storage of coating.And the ordered arrangement that high length-diameter ratio acicular wollastonite is under shear action, improves the thixotropy of coating, it is more beneficial for brushing performance and the levelability of coating, and the generation of sagging when reducing brushing.
Beneficial effects of the present invention: the present invention adds the draw ratio high length-diameter ratio acicular wollastonite more than 20:1 in emulsion coatings formula, significantly improves the thixotropy of emulsion coatings.The modified emulsion Paint preparation technology of the present invention is simple, processing ease, it is not necessary to extra additional investment and scrap build.Coating prepared by the formula according to the present invention, sterically hindered effect due to high length-diameter ratio acicular wollastonite, make coating have more preferable static stability, coating generation of inorganic filler sedimentation in preparation and accumulating can be prevented effectively from, improve stability and the time of storage of coating.And the ordered arrangement that high length-diameter ratio acicular wollastonite is under shear action, also improves the thixotropy of coating, it is more beneficial for brushing performance and the levelability of coating, the generation of sagging when reducing brushing.In a word, the emulsion coatings formula that the acicular wollastonite of the present invention is filling-modified can be widely used in the emulsion coatingss such as polyurethane, polyvinyl acetate, polyacrylate, styrene-acrylic resin, on the premise of not changing the basic components of emulsion coatings, key property, production technology and production equipment, the thixotropic property of emulsion coatings is greatly improved, thus is effectively improved the processing of emulsion coatings, accumulating ability and brushing performance.
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with detailed description of the invention, but is defined in the claims.
Accompanying drawing explanation
The emulsion coatings thixotropy that the acicular wollastonite of Fig. 1 difference draw ratio is filling-modified improves proportional curve.
Detailed description of the invention
Embodiment 1:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 25g titanium dioxide, 5g calcium carbonate, 20g pure water, 0.4g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 0.1g sodium carboxymethyl cellulose, 9g draw ratio is the acicular wollastonite of 25:1.Said components stirs and i.e. obtains the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 3%, 100-sTime shear viscosity reduce by 20%, i.e. thixotropy improve 23%.
Embodiment 2:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyaminoester emulsion 40g that solid content is 50%, 20g titanium dioxide, 10g lithopone, 5g Pulvis Talci, 20g pure water, 0.5g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 4g draw ratio is the acicular wollastonite of 30:1.Said components stirs and i.e. obtains the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 15%, i.e. thixotropy improve 17%.
Embodiment 3:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyacrylate dispersion 35g that solid content is 60%, 15g calcium carbonate, 10g lithopone, 3g aluminium sesquioxide, 5g Pulvis Talci, 25g pure water, 0.5g tributyl phosphate, 1.5g phthalocyanine blue, 5g draw ratio is the acicular wollastonite of 25:1.Said components stirs and i.e. obtains the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 17%, i.e. thixotropy improve 19%.
Embodiment 4:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the styrene-acrylic emulsion 35g that solid content is 60%, 20g titanium dioxide, 10g lithopone, 25g pure water, 10g draw ratio is the acicular wollastonite of 20:1.Said components stirs and i.e. obtains the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 3%, 100-sTime shear viscosity reduce by 12%, i.e. thixotropy improve 15%.
Embodiment 5:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 20g titanium dioxide, 10g Pulvis Talci, 5g silicon dioxide, 20g pure water, 0.4g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 4g draw ratio is the acicular wollastonite of 25:1, after stirring evenly, add 0.1g sodium carboxymethyl cellulose, stir and i.e. obtain the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 17%, i.e. thixotropy improve 19%.
Embodiment 6:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 24g titanium dioxide, 10g Pulvis Talci, 20g pure water, 0.3g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 5g draw ratio is the acicular wollastonite of 30:1, after stirring evenly, add 0.2g sodium carboxymethyl cellulose, stir and i.e. obtain the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 16%, i.e. thixotropy improve 18%.
Embodiment 7:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyacrylate dispersion 35g that solid content is 60%, 20g titanium dioxide, 10g lithopone, 5g Pulvis Talci, 25g pure water, 5g draw ratio is the acicular wollastonite of 20:1.Said components stirs and i.e. obtains the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 13%, i.e. thixotropy improve 15%.
Embodiment 8:
The emulsion coatings formula that a kind of high length-diameter ratio acicular wollastonite is filling-modified, consisting of: the polyacrylate dispersion 40g that solid content is 50%, 20g titanium dioxide, 10g lithopone, 5g Pulvis Talci, 25g pure water, 0.3g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 4g draw ratio is the acicular wollastonite of 30:1, after stirring evenly, add 0.2g sodium lauryl sulphate, stir and i.e. obtain the emulsion coatings that described wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 2%, 100-sTime shear viscosity reduce by 19%, i.e. thixotropy improve 21%.
Comparative example 1
The emulsion coatings formula that a kind of acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 25g titanium dioxide, 5g calcium carbonate, 20g pure water, 0.4g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 0.1g sodium carboxymethyl cellulose, 9g draw ratio is the acicular wollastonite of 8:1.Said components stirs and i.e. obtains the emulsion coatings that wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 3%, 100-sTime shear viscosity the most unchanged, i.e. thixotropy improve 3%.
Comparative example 2
The emulsion coatings formula that a kind of acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 25g titanium dioxide, 5g calcium carbonate, 20g pure water, 0.4g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 0.1g sodium carboxymethyl cellulose, 9g draw ratio is the acicular wollastonite of 15:1.Said components stirs and i.e. obtains the emulsion coatings that wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 3%, 100-sTime shear viscosity reduce by 1%, i.e. thixotropy improve 4%.
Comparative example 3
The emulsion coatings formula that a kind of acicular wollastonite is filling-modified, consisting of: the polyvinyl acetate emulsion 40g that solid content is 50%, 25g titanium dioxide, 5g calcium carbonate, 20g pure water, 0.4g tributyl phosphate, 0.5g penta sodium pentachlorophenate, 0.1g sodium carboxymethyl cellulose, 9g draw ratio is the acicular wollastonite of 18:1.Said components stirs and i.e. obtains the emulsion coatings that wollastonite is filling-modified.
Above-mentioned modified emulsion coating is compared with the emulsion coatings not adding wollastonite, and 0 shear viscosity improves 3%, 100-sTime shear viscosity reduce by 3%, i.e. thixotropy improve 6%.
Claims (6)
1. the emulsion coatings that an acicular wollastonite is filling-modified, it is characterised in that by weight percentage, described emulsion coatings is made up of following component:
A () polymer emulsion, consumption is 35-40%；
B () inorganic filler, consumption is 30-40%；
C () thickening agent, consumption is 0-0.2%；
D () draw ratio is the acicular wollastonite of 20-30:1, consumption is 4-10%；
E () other auxiliary agents, consumption is 0-2%；
F () pure water, consumption is 20-25%.
The emulsion coatings that acicular wollastonite the most according to claim 1 is filling-modified, it is characterised in that described polymer emulsion is polyurethane, polyvinyl acetate, polyacrylate or styrene-acrylic resin emulsion, its solid content is 50 wt %-60 wt %.
The emulsion coatings that acicular wollastonite the most according to claim 1 is filling-modified, it is characterised in that described inorganic filler is one or more in titanium dioxide, Pulvis Talci, calcium carbonate, lithopone, aluminium sesquioxide, silicon dioxide.
The emulsion coatings that acicular wollastonite the most according to claim 1 is filling-modified, it is characterised in that described thickening agent is sodium carboxymethyl cellulose or sodium lauryl sulphate.
The emulsion coatings that acicular wollastonite the most according to claim 1 is filling-modified, it is characterised in that the draw ratio of described acicular wollastonite is 25-30:1.
The emulsion coatings that acicular wollastonite the most according to claim 1 is filling-modified, it is characterised in that other described auxiliary agents are one or more in antifungus agent, defoamer, pigment.
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| CN105462392A (en) * | 2015-12-30 | 2016-04-06 | 曲少春 | Durable building external wall paint and preparation method thereof |
| CN107641388A (en) * | 2017-11-09 | 2018-01-30 | 安徽艾米伦特建材科技有限公司 | Sheet material water-repellent paint and preparation method thereof |
| CN110358389A (en) * | 2019-06-27 | 2019-10-22 | 河北晨阳工贸集团有限公司 | Floating coating containing sand and preparation method thereof |
| CN114410130A (en) * | 2021-11-23 | 2022-04-29 | 江西广源化工有限责任公司 | Modified wollastonite and preparation method and application thereof |
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