CN104386983B - A kind of water-fast silicate coating and preparation method thereof - Google Patents
A kind of water-fast silicate coating and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of water-fast silicate coating and preparation method thereof, the mass percent that its feed composition and each component account for raw material total amount is respectively: aqueous silicate solution 30% ~ 45%, water-soluble polymers 1% ~ 3%, Nano-meter SiO_2
25% ~ 10%, sericite 15% ~ 20%, titanium dioxide 15% ~ 25%, calcium carbonate 10% ~ 20%; Obtained silicate coating has following characteristics: cheap, applied range; Water-resistant coating is good; Coating adopts water solution system, nontoxic, environmental protection.
Description
Technical field
The invention belongs to inorganic paint technical field, particularly relate to a kind of water-fast silicate coating and preparation method thereof.
Background technology
Coating is widely used in building field, but most of coating is all take organism as filmogen, and these coating in use can produce some problem of environmental pollutions, all cause great harm to HUMAN HEALTH and environment.Conventional inorganic paint is mainly main film forming substance, mainly water glass or potassium silicate aqueous solution with silicate.But after water glass or potassium silicate film forming, meet water and be easy to dissolve, water resistance is very poor, greatly limit the use of silicate inorganic coating.
Summary of the invention
Object of the present invention provides a kind of water-fast silicate coating to improve the deficiencies in the prior art, another object of the present invention is to provide the above-mentioned preparation method being to provide a kind of water-fast silicate coating, make the silicate coating obtained obtain excellent water resistance, thus promote the development of inorganic paint.
Technical scheme of the present invention is: a kind of water-fast silicate coating, it is characterized in that the mass percent that its feed composition and each component account for raw material total amount is respectively: aqueous silicate solution 30% ~ 45%, water-soluble polymers 1% ~ 3%, Nano-meter SiO_2
25% ~ 10%, sericite 15% ~ 20%, titanium dioxide 15% ~ 25%, calcium carbonate 10% ~ 20%; Wherein SiO in aqueous silicate solution
2mass content is 20% ~ 30%; Polyvinyl alcohol (PVA) aqueous solution that water-soluble polymers is benzene emulsion, waterbased urethane solution or mass concentration are 3% ~ 6%.
Preferably above-mentioned aqueous silicate solution is prepared by following methods, its concrete steps are as follows: by modulus be 2.5 ~ 3.1 sodium silicate or potash water glass join in distilled water heat 25 ~ 100 DEG C of stirrings, then add acidic aqueous solution wherein to separate out completely to precipitation, neutrality is precipitated to distilled water wash, then in precipitation, alkaline organic is added, heat 30 ~ 80 DEG C of reactions, obtain clear transparent solutions.
Preferably above-mentioned acidic aqueous solution is the acidic aqueous solutions such as boric acid, sulfuric acid or hydrochloric acid; Described alkaline organic is sodium methyl silicate or potassium methyl silicate etc.
The volume ratio of preferably above-mentioned sodium silicate or potash water glass and distilled water is 1:(1 ~ 3); The add-on of alkaline organic is that alkaline organic accounts for 15% ~ 30% of precipitation and alkaline organic total mass.
Present invention also offers the preparation method of above-mentioned water-fast silicate coating; Its concrete steps are as follows:
A. aqueous silicate solution heated and stirred 5 ~ 10min is measured; Wherein Heating temperature is 35 ~ 50 DEG C, and rotating speed is 500rpm ~ 800rpm;
B. drip water-soluble polymers, stir 5 ~ 10min;
C. Nano-meter SiO_2 is added again
2, work as Nano-meter SiO_2
2be dissolved completely in solution, then add sericite, titanium dioxide and calcium carbonate, stir 3 ~ 8h discharging.
The present invention, by adding the mineral acid aqueous solution such as boric acid in the low concentration of water glass of dilution, produces silicate hydrate precipitation, and sodium ion is removed in washing afterwards, and last and sodium methyl silicate or methyl siliconic acid nak response obtain transparent aqueous silicate solution.Because be incorporated into by methyl in water glass film forming framework, kept out the attack of water molecules, after the film forming of the water glass of modification, waterproof ability improves greatly.The Nano-meter SiO_2 simultaneously added in coating
2, improve the modulus of water glass, also enhance cohesive strength and the waterproof ability of water glass.Sericite is a kind of flaky substance that radius-thickness ratio is very large, exists in coating film process with sheet form, effectively can keep out water molecules and infiltrate.Water-soluble polymers be added in the film-forming properties greatly enhancing coating.
Beneficial effect:
(1) cheap, applied range;
(2), water-resistant coating is good;
(3) coating adopts water solution system, nontoxic, environmental protection;
Embodiment
For convenience of explanation, feed components consumption is all weight percentage.
Example 1
| Aqueous silicate solution | 30％ |
| Water-soluble polymers | 1％ |
| Nano-meter SiO_2 2 | 10％ |
| Sericite | 15％ |
| Titanium dioxide | 24％ |
| Calcium carbonate | 20％ |
Preparation process is as follows:
1. by modulus be 2.5 sodium silicate to join volume ratio be in the distilled water of 1:1, agitation and dilution under 30 DEG C of conditions, then boric acid aqueous solution is added wherein, precipitation is first separated out and is dissolved afterwards, continue to add boric acid aqueous solution to a large amount of Precipitation, be precipitated to neutrality with distilled water wash, in precipitation, then add sodium methyl silicate (add-on of sodium methyl silicate is that alkaline organic accounts for 15% of precipitation and alkaline organic total mass), clear is obtained, SiO at 80 DEG C of reaction 5min
2mass content is the aqueous silicate solution of 30%.
2. (1) gets aqueous silicate solution heated and stirred 10min, and Heating temperature is 50 DEG C, and rotating speed is 500rpm.
(2) slowly drip the PVA aqueous solution of massfraction 3%, stir 10min, make it fully fused.
(3) Nano-meter SiO_2 is added
2, to SiO
2be dissolved completely in solution, then add sericite respectively, titanium dioxide, pearl filler, stir 8h discharging.
By obtained coating ph value between 8 ~ 9, surface drying time is 1.2h, and coating is immersed in 240h in water, and without bubbling, flawless, without peeling off.Acid-and base-resisting time 170h.
Example 2
| Aqueous silicate solution | 45％ |
| Water-soluble polymers | 3％ |
| Nano-meter SiO_2 2 | 5％ |
| Sericite | 15％ |
| Titanium dioxide | 22％ |
| Calcium carbonate | 10％ |
Preparation process is as follows:
1. by modulus be 3.1 sodium silicate to join volume ratio be in the distilled water of 1:2, agitation and dilution under 50 DEG C of conditions, then boric acid aqueous solution is added wherein, precipitation is first separated out and is dissolved afterwards, continue to add boric acid aqueous solution to a large amount of Precipitation, be precipitated to neutrality with distilled water wash, in precipitation, then add sodium methyl silicate (add-on of sodium methyl silicate is that alkaline organic accounts for 15% of precipitation and alkaline organic total mass), clear is obtained, SiO at 30 DEG C of reaction 35min
2content is the aqueous silicate solution of 30%.
2. (1) gets aqueous silicate solution heated and stirred 5min, and Heating temperature is 40 DEG C, and rotating speed is 800rpm.
(2) slowly drip the PVA aqueous solution of massfraction 6%, stir 5min, make it fully fused.
(3) Nano-meter SiO_2 is added
2, work as SiO
2be dissolved completely in solution, then add sericite respectively, titanium dioxide, pearl filler stirs 5h discharging.
By obtained coating ph value between 8 ~ 9, surface drying time is 2h, and coating is immersed in 230h in water, and without bubbling, flawless, without peeling off.Acid-and base-resisting time 168h.
Example 3
| Aqueous silicate solution | 43％ |
| Water-soluble polymers | 2％ |
| Nano-meter SiO_2 2 | 10％ |
| Sericite | 15％ |
| Titanium dioxide | 15％ |
| Calcium carbonate | 15％ |
Preparation process is as follows:
1. by modulus be 2.5 sodium silicate to join volume ratio be in the distilled water of 1:3, agitation and dilution under 90 DEG C of conditions, then aqueous sulfuric acid is added wherein, precipitation is first separated out and is dissolved afterwards, continue to add aqueous sulfuric acid to a large amount of Precipitation, be precipitated to neutrality with distilled water wash, in precipitation, then add sodium methyl silicate (add-on of sodium methyl silicate is that alkaline organic accounts for 30% of precipitation and alkaline organic total mass), clear is obtained, SiO at 60 DEG C of reaction 10min
2content is the aqueous silicate solution of 20%.
2. (1) gets aqueous silicate solution heated and stirred 8min, and Heating temperature is 35 DEG C, and rotating speed is 600rpm.
(2) slowly drip the PVA aqueous solution of massfraction 5%, stir 8min, make it fully fused.
(3) Nano-meter SiO_2 is added
2, work as SiO
2be dissolved completely in solution, then add sericite respectively, titanium dioxide, pearl filler stirs 3h discharging.
By obtained coating ph value between 8 ~ 9, surface drying time is 1h, and coating is immersed in 160h in water, and without bubbling, flawless, without peeling off.Acidproof, the alkaline-resisting time is 120h.
Example 4
| Aqueous silicate solution | 38％ |
| Water-soluble polymers | 2％ |
| Nano-meter SiO_2 2 | 8％ |
| Sericite | 20％ |
| Titanium dioxide | 15％ |
| Calcium carbonate | 17％ |
Preparation process is as follows:
1. by modulus be 2.5 potash water glass to join volume ratio be in the distilled water of 1:3, agitation and dilution under 90 DEG C of conditions, then aqueous sulfuric acid is added wherein, precipitation is first separated out and is dissolved afterwards, continue to add aqueous sulfuric acid to a large amount of Precipitation, be precipitated to neutrality with distilled water wash, in precipitation, then add the sodium methyl silicate of 20%, clear is obtained, SiO at 60 DEG C of reaction 10min
2content is the aqueous silicate solution of 20%.
2. (1) gets aqueous silicate solution heated and stirred 10min, and Heating temperature is 50 DEG C, and rotating speed is 800rpm.
(2) drip benzene emulsion, stir 5min, make it fully fused.
(3) Nano-meter SiO_2 is added
2, work as SiO
2be dissolved completely in solution, then add sericite respectively, titanium dioxide, pearl filler stirs 8h discharging.
By obtained coating ph value between 8 ~ 9, surface drying time is 1.5, and coating is immersed in 170h in water, and without bubbling, flawless, without peeling off.The acid-and base-resisting time is 150h.
Example 5
Preparation process is as follows:
1. by modulus be 2.8 potash water glass to join volume ratio be in the distilled water of 1:3, agitation and dilution under 70 DEG C of conditions, then aqueous hydrochloric acid is added wherein, precipitation is first separated out and is dissolved afterwards, continue to add aqueous hydrochloric acid to a large amount of Precipitation, be precipitated to neutrality with distilled water wash, in precipitation, then add the sodium methyl silicate of 15%, clear is obtained, SiO at 55 DEG C of reaction 15min
2content is the aqueous silicate solution of 26%.
2. (1) gets aqueous silicate solution heated and stirred 10min, and Heating temperature is 50 DEG C, and rotating speed is 800rpm.
(2) slowly drip polyurethane solution, stir 5min.
(3) Nano-meter SiO_2 is added
2, work as SiO
2be dissolved completely in solution, then add sericite respectively, titanium dioxide, pearl filler stirs 8h discharging.
By obtained coating ph value between 8 ~ 9, surface drying time is 2h, and coating is immersed in 190h in water, and without bubbling, flawless, without peeling off.Acid-and base-resisting time 150h.
Claims (2)
1. a water-fast silicate coating, is characterized in that the mass percent that its feed composition and each component account for raw material total amount is respectively: aqueous silicate solution 30% ~ 45%, water-soluble polymers 1% ~ 3%, Nano-meter SiO_2
25% ~ 10%, sericite 15% ~ 20%, titanium dioxide 15% ~ 25%, calcium carbonate 10% ~ 20%; Wherein SiO in aqueous silicate solution
2mass content is 20% ~ 30%; Water-soluble polymers is benzene emulsion, waterbased urethane solution or mass concentration are the polyvinyl alcohol water solution of 3% ~ 6%; Wherein said aqueous silicate solution is prepared by following methods, its concrete steps are as follows: by modulus be 2.5 ~ 3.1 sodium silicate or potash water glass join in distilled water heat 25 ~ 100 DEG C of stirrings, then add acidic aqueous solution wherein to separate out completely to precipitation, neutrality is precipitated to distilled water wash, then in precipitation, alkaline organic is added, heat 30 ~ 80 DEG C of reactions, obtain clear transparent solutions; Wherein said acidic aqueous solution is boric acid, sulfuric acid or aqueous hydrochloric acid; Described alkaline organic is sodium methyl silicate or potassium methyl silicate; The volume ratio of sodium silicate or potash water glass and distilled water is 1:(1 ~ 3); The add-on of alkaline organic is that alkaline organic accounts for 15% ~ 30% of precipitation and alkaline organic total mass.
2. prepare the method for water-fast silicate coating as claimed in claim 1 for one kind; Its concrete steps are as follows:
A. aqueous silicate solution heated and stirred 5 ~ 10min is measured; Wherein Heating temperature is 35 ~ 50 DEG C, and rotating speed is 500rpm ~ 800rpm;
B. drip water-soluble polymers, stir 5 ~ 10min;
C. Nano-meter SiO_2 is added again
2, work as Nano-meter SiO_2
2be dissolved completely in solution, then add sericite, titanium dioxide and calcium carbonate, stir 3 ~ 8h discharging.
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| CN106084925A (en) * | 2016-07-20 | 2016-11-09 | 中科院广州化学有限公司南雄材料生产基地 | A kind of containing high antifouling inorganic silicate coating of organosilicon and its preparation method and application |
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| CN109175219A (en) * | 2018-09-30 | 2019-01-11 | 郑州远东耐火材料有限公司 | A kind of waterproof, modifier of easy mold release and its preparation method and application |
| CN110183139A (en) * | 2019-06-24 | 2019-08-30 | 东北大学 | A kind of concrete anti-seepage agent and preparation method |
| CN112480728B (en) * | 2020-12-01 | 2021-12-28 | 东莞大宝化工制品有限公司 | Preparation method of inorganic coating |
| CN115717004A (en) * | 2022-11-23 | 2023-02-28 | 沪宝新材料科技（上海）股份有限公司 | Silicate exterior wall coating and preparation method thereof |
| CN115785706B (en) * | 2022-12-28 | 2024-02-02 | 江苏集萃道路工程技术与装备研究所有限公司 | Environment-friendly inorganic static-conductive anticorrosive paint and preparation method thereof |
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| CN1297614C (en) * | 2004-03-30 | 2007-01-31 | 赵力 | Method for preparing high modulus potassium metasilicate solution for coating |
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