CN104151916A - Formula of high-thixotropy emulsion coating containing glass fiber micropowder - Google Patents
Formula of high-thixotropy emulsion coating containing glass fiber micropowder Download PDFInfo
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- CN104151916A CN104151916A CN201410363702.6A CN201410363702A CN104151916A CN 104151916 A CN104151916 A CN 104151916A CN 201410363702 A CN201410363702 A CN 201410363702A CN 104151916 A CN104151916 A CN 104151916A
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Abstract
The invention discloses a novel formula of a high-thixotropy emulsion coating containing glass fiber micropowder. The glass fiber micropowder with a specific length-diameter ratio is added into the emulsion coating; the emulsion coating comprises the following components in percentage by weight: (a) 35%-40% of polymer emulsion, (b) 35%-40% of inorganic fillers, (c) 0%-0.2% of a thickener, (d) 0.5%-5% of glass fiber micropowder with specific length-diameter ratio of (20: 1) to (30: 1), (d) 0%-2% of other assistant and (e) 20%-25% of purified water. According to the formula, the emulsion coating is filled and modified with the glass fiber micropowder with the specific length-diameter ratio, so that the stability and thixotropy of the emulsion coating are remarkably improved; the formula can be widely used in emulsion coatings of polyurethane, polyvinyl acetate, polyacrylate, styrene-acrylic resin and the like, and the processing, storage and transport performance and brushing performance of the emulsion coating are effectively improved on the premise of not changing a basic formula, a production process and production equipment of the emulsion coating.
Description
Technical field
The present invention relates to a kind of emulsion coatings of modification, particularly relate to a kind of high thixotropic emulsion coatings containing specific length-to-diameter ratio glass fibre micro mist and newly fill a prescription.
Background technology
Thixotropy refers to that liquid can become the state that mobility is larger from thickness state under shearing action, and after shearing action is cancelled, liquid returns to the performance of original thickness state again.Thixotropy is the important factor that determines coating quality.Good thixotropy can ensure that coating has lower viscosity in brushing process, be conducive to the carrying out of brushing work, and can improve the levelling property of coating, and also can promote the rapid rising of viscosity after coating brushing simultaneously, avoid brushing the generation of rear sagging phenomenon; And good thixotropy is conducive to the stability in coating storage and transportation.Therefore, the thixotropic property of raising coating is to improve the important method of coating over-all properties.
At present, glass fibre micro mist is mainly that the waste silk producing during by glass fiber wire-drawing prepares through industrial means such as ball millings.Due to its relatively cheap price, glass fibre micro mist uses mainly as the compatibilization filler of matrix material at present.According to different ball-milling technologies and working method, can obtain the glass fibre micro mist of different length-to-diameter ratios.Wherein, the glass fibre micro mist of length-to-diameter ratio between 20:1-30:1 is the glass fibre micro mist compared with high length-diameter ratio.Glass fibre micro mist never uses in coating or other industry as thixotropic agent.
Summary of the invention
The object of the present invention is to provide a kind of high thixotropic emulsion coatings formula that contains glass fibre micro mist, adopt the glass fibre micro mist of specific length-to-diameter ratio to carry out filling-modified to emulsion coatings, can significantly improve the thixotropy of emulsion coatings, thereby improve the stability of emulsion coatings storage and transport, improve brushing performance and the levelling property of coating.
The object of the invention is to realize by following measures:
A high thixotropic emulsion coatings formula that contains glass fibre micro mist, is characterized in that, by weight percentage, described emulsion coatings is made up of following component:
(a) polymer emulsion, consumption is 35-40%;
(b) mineral filler, consumption is 35-40%;
(c) thickening material, consumption is 0-0.2%;
(d) the glass fibre micro mist of length-to-diameter ratio between 20:1-30:1, consumption is 0.5-5%;
(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 (PVA), polyacrylic ester or styrene-acrylic resin emulsion, and its solid content is 50 wt %-60 wt %.
Mineral filler of the present invention comprises one or more in titanium dioxide, talcum powder, calcium carbonate, zinc sulfide white, aluminium sesquioxide, silicon-dioxide, is the conventional products of market sale.
Thickening material of the present invention, preferably from Xylo-Mucine or sodium lauryl sulphate, is the conventional products of market sale.
Specific length-to-diameter ratio glass fibre micro mist of the present invention, as the thixotroping conditioning agent in emulsion coatings formula, refers in particular to length-to-diameter ratio between 20:1-30:1, the glass fibre micro mist that diameter is 7-11um, and there is sale in market.
Other auxiliary agents of the present invention include but not limited to, one or more in mould inhibitor (as sodium pentachlorophenate), defoamer (as tributyl phosphate), pigment (as phthalocyanine blue) are the conventional auxiliary agent of coating of market sale.
Applicant finds under study for action, when length-to-diameter ratio is between 20:1-30:1, and thixotropy tool the increase significantly effect of glass fibre micro mist to emulsion coatings formula.The present invention, according to above-mentioned discovery, adds the glass fibre micro mist of length-to-diameter ratio between 20:1-30:1 in emulsion coatings formula.The glass fibre micro mist of this length-to-diameter ratio scope adds after coating, can form certain sterically hindered, avoid the reunion again of mineral filler in coating, improve to a certain extent the static viscosity of coating, thereby effectively reduce the generation of coating mineral filler sedimentation in preparation and storage and transport process.And when coating being applied after external force shearing, the glass fibre micro mist of this length-to-diameter ratio scope can be rapidly along shearing action direction ordered arrangement, the shear viscosity of coating is obviously declined, thereby effectively improve the thixotropic property of coating, be conducive to the brushing of coating and the raising of flow leveling.
In the present invention, using the glass fibre micro mist of specific length-to-diameter ratio (20:1-30:1) is key problem in technology key element wherein.If while using length-to-diameter ratio to be greater than the glass fibre micro mist of 30:1, larger length-to-diameter ratio can cause the entanglement of glass fibre micro mist self, causes dope viscosity too high, preparation difficulty strengthens; Meanwhile, under shearing action, the excessive glass fibre micro mist of length-to-diameter ratio is difficult to realize ordered arrangement along shearing action direction, cannot obtain the raising of paint thixotropy.And in the time using length-to-diameter ratio to be less than the glass fibre micro mist of 20:1, too short length-to-diameter ratio makes this sterically hindered effect be difficult to embody, and under shearing action, promote that dope viscosity decline phenomenon is also not obvious, thereby cannot realize the high thixotropic of coating.
Prioritization scheme of the present invention is: be the polymer emulsion 40g of 50-60wt % by solid content, 25g titanium dioxide, 5g calcium carbonate, 5g talcum powder, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after stirring evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 25:1, the glass fibre micro mist of diameter 10um, and said components is mixed and is stirred.Emulsion coatings prepared by this formula, due to the sterically hindered effect of glass fibre micro mist, makes coating have better static stability, can effectively avoid the generation of coating mineral filler sedimentation in preparation and accumulating, improves stability and the storage time of coating.And the ordered arrangement of glass fibre micro mist under shearing action, has improved the thixotropy of coating, is more conducive to brushing performance and the levelling property of coating, the generation of sagging while reducing brushing.
Beneficial effect of the present invention: the present invention adds the glass fibre micro mist of the specific length-to-diameter ratio of length-to-diameter ratio between 20:1-30:1 as the thixotropy conditioning agent in emulsion coatings formula in emulsion coatings formula, has significantly improved the thixotropy of emulsion coatings.Modified emulsion coating preparation technology of the present invention is simple, and processing ease, without extra additional investment and scrap build.Coating prepared by formula according to the present invention, due to the sterically hindered effect of glass fibre micro mist, make coating there is better static stability, can effectively avoid the generation of coating mineral filler sedimentation in preparation and accumulating, improve stability and the storage time of coating.And the ordered arrangement of glass fibre micro mist under shearing action, has also improved the thixotropy of coating, is more conducive to brushing performance and the levelling property of coating, the generation of sagging while reducing brushing.And the glass fibre micro mist in this formula is the waste silk preparation that glass fibre is produced, and cheap, raw material is easy to get, and can not increase the production cost of product.
In a word, the high thixotropic emulsion coatings formula that contains glass fibre micro mist of the present invention can be widely used in the emulsion coatingss such as urethane, polyvinyl acetate (PVA), polyacrylic ester, styrene-acrylic resin, under the prerequisite of basic components, fundamental property, production technique and production unit that does not change emulsion coatings, significantly improve the thixotropic property of emulsion coatings, thereby effectively improve processing, accumulating ability and the brushing performance of emulsion coatings.
Describe the present invention below in conjunction with specific embodiment.Protection scope of the present invention is not limited with embodiment, but is limited by claim.
Brief description of the drawings
The emulsion coatings thixotropy of the glass fibre micro mist that Fig. 1 contains different length-to-diameter ratios improves proportional curve.
Embodiment
Embodiment 1:
A high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the aqueous polyvinyl acetate emulsion 40g that is 50% by solid content, with 25g titanium dioxide, 5g calcium carbonate, 5g talcum powder, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stir evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 25:1, the glass fibre micro mist of diameter 10um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 22%, thixotropy improve 24%.
Embodiment 2:
A kind of high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the polyaminoester emulsion 40g that is 50% by solid content, with 20g titanium dioxide, 10g zinc sulfide white, 5g talcum powder, 20g pure water, 0.5g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stirring evenly, adding 4g length-to-diameter ratio is 30:1, the glass fibre micro mist of diameter 11um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 21%, thixotropy improve 23%.
Embodiment 3:
A high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the polyacrylate dispersion 35g that is 60% by solid content, with 15g calcium carbonate, 10g zinc sulfide white, 3g aluminium sesquioxide, 5g talcum powder, 25g pure water, 0.5g tributyl phosphate, 1.5g phthalocyanine blue, after mixing, stirring evenly, adding 5g length-to-diameter ratio is 25:1, the glass fibre micro mist of diameter 7um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 20%, thixotropy improve 22%.
Embodiment 4:
A kind of high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the benzene emulsion 35g that is 60% by solid content, with 20g titanium dioxide, 10g zinc sulfide white, 5g talcum powder, 25g pure water, after mixing, stirring evenly, adding 5g length-to-diameter ratio is 20:1, the glass fibre micro mist of diameter 7um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 13%, thixotropy improve 15%.
Embodiment 5:
A high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the aqueous polyvinyl acetate emulsion 40g that is 50% by solid content, with 20g titanium dioxide, 10g talcum powder, 5g silicon-dioxide, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stirring evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 25:1, the glass fibre micro mist of diameter 11um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 20%, thixotropy improve 22%.
Embodiment 6:
A kind of high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the aqueous polyvinyl acetate emulsion 39g that is 50% by solid content, with 25g titanium dioxide, 10g talcum powder, 5g silicon-dioxide, 20g pure water, 0.3g tributyl phosphate, after mixing, stirring evenly, add 0.2g Xylo-Mucine, 0.5g length-to-diameter ratio is 30:1, the glass fibre micro mist of diameter 7um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 1%, 100
-stime shear viscosity reduce by 15%, thixotropy improve 16%.
Embodiment 7:
A kind of high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the polyacrylate dispersion 35g that is 60% by solid content, with 20g titanium dioxide, 10g zinc sulfide white, 5g talcum powder, 25g pure water, after mixing, stirring evenly, adding 5g length-to-diameter ratio is 20:1, the glass fibre micro mist of diameter 11um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 14%, thixotropy improve 16%.
Embodiment 8:
A high thixotropic emulsion coatings formula that contains specific length-to-diameter ratio glass fibre micro mist, the polyacrylate dispersion 40g that is 50% by solid content, with 20g titanium dioxide, 10g zinc sulfide white, 5g talcum powder, 25g pure water, 0.3g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stirring evenly, add 0.2g sodium lauryl sulphate, 4g length-to-diameter ratio is 30:1, the glass fibre micro mist of diameter 11um, the said components high thixotropic emulsion coatings that contains glass fibre micro mist described in can obtaining that stirs.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 20%, thixotropy improve 22%.
Comparative example 1
The aqueous polyvinyl acetate emulsion 40g that an emulsion coatings formula that contains glass fibre micro mist is 50% by solid content, with 25g titanium dioxide, 5g calcium carbonate, 5g talcum powder, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stir evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 10:1, the glass fibre micro mist of diameter 10um, said components stirs and can obtain the emulsion coatings that contains glass fibre micro mist.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 1%, thixotropy improve 3%.
Comparative example 2
The aqueous polyvinyl acetate emulsion 40g that an emulsion coatings formula that contains glass fibre micro mist is 50% by solid content, with 25g titanium dioxide, 5g calcium carbonate, 5g talcum powder, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stir evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 18:1, the glass fibre micro mist of diameter 10um, said components stirs and can obtain the emulsion coatings that contains glass fibre micro mist.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 2%, 100
-stime shear viscosity reduce by 2%, thixotropy improve 4%.
Comparative example 3
The aqueous polyvinyl acetate emulsion 40g that an emulsion coatings formula that contains glass fibre micro mist is 50% by solid content, with 25g titanium dioxide, 5g calcium carbonate, 5g talcum powder, 20g pure water, 0.4g tributyl phosphate, 0.5g sodium pentachlorophenate, after mixing, stir evenly, add 0.1g Xylo-Mucine, 4g length-to-diameter ratio is 32:1, the glass fibre micro mist of diameter 10um, said components stirs and can obtain the emulsion coatings that contains glass fibre micro mist.
Above-mentioned modified emulsion coating is not compared with adding the emulsion coatings of glass fibre micro mist, and 0 shear viscosity improves 16%, 100
-stime shear viscosity improve 7%.Although thixotropy improves 9%, viscosity rise under high shear rate, brushing difficulty improves, and modification is unsuccessful.
Claims (6)
1. a high thixotropic emulsion coatings formula that contains glass fibre micro mist, is characterized in that, by weight percentage, described emulsion coatings is made up of following component:
(a) polymer emulsion, consumption is 35-40%;
(b) mineral filler, consumption is 35-40%;
(c) thickening material, consumption is 0-0.2%;
(d) the glass fibre micro mist of length-to-diameter ratio between 20:1-30:1, consumption is 0.5-5%;
(e) other auxiliary agents, consumption is 0-2%;
(f) pure water, consumption is 20-25%.
2. the high thixotropic emulsion coatings formula that contains glass fibre micro mist according to claim 1, it is characterized in that, described polymer emulsion is urethane, polyvinyl acetate (PVA), polyacrylic ester or styrene-acrylic resin emulsion, and its solid content is 50 wt %-60 wt %.
3. the high thixotropic emulsion coatings formula that contains glass fibre micro mist according to claim 1, is characterized in that, described mineral filler is one or more in titanium dioxide, talcum powder, calcium carbonate, zinc sulfide white, aluminium sesquioxide, silicon-dioxide.
4. the high thixotropic emulsion coatings formula that contains glass fibre micro mist according to claim 1, is characterized in that, described thickening material is Xylo-Mucine or sodium lauryl sulphate.
5. the high thixotropic emulsion coatings formula that contains glass fibre micro mist according to claim 1, is characterized in that, described glass fibre micro mist be commercially available length-to-diameter ratio between 20:1-30:1, the glass fibre micro mist that diameter is 7-11um.
6. the high thixotropic emulsion coatings formula that contains glass fibre micro mist according to claim 1, is characterized in that, other described auxiliary agents are one or more in mould inhibitor, defoamer, pigment.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106957569A (en) * | 2017-03-29 | 2017-07-18 | 崔玉香 | A kind of negative oxygen liquid wall clothing and preparation method thereof |
| CN107793914A (en) * | 2017-11-21 | 2018-03-13 | 广西吉宽太阳能设备有限公司 | Flame-retardant architectural paint and production method |
| CN111378410A (en) * | 2018-12-28 | 2020-07-07 | 浙江荣泰科技企业有限公司 | Single-component rheologically stable high-strength epoxy encapsulating resin adhesive and preparation method thereof |
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Patent Citations (5)
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