CN113462293A - Silane modified resin waterproof coating and preparation method thereof - Google Patents
Silane modified resin waterproof coating and preparation method thereof Download PDFInfo
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- CN113462293A CN113462293A CN202110749368.8A CN202110749368A CN113462293A CN 113462293 A CN113462293 A CN 113462293A CN 202110749368 A CN202110749368 A CN 202110749368A CN 113462293 A CN113462293 A CN 113462293A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention relates to a silane modified resin waterproof coating and a preparation method thereof, wherein the silane modified resin waterproof coating is mainly prepared from the following components in parts by weight: compounding plasticizer: filling: thixotropic agent: silane-modified polymer resin: coupling agent: light stabilizer: 0.4-0.7% of catalyst: 0.9-1.2: 0.05-0.12: 1: 0.05-0.12: 0.05-0.12: 0.02-0.05. The invention overcomes the defects that the existing silane modified coating has high strength and weather resistance, but has high viscosity and is not beneficial to construction operation, and the silane modified resin waterproof coating has high strength and weather resistance, reduces the viscosity and improves the construction performance of the coating by adopting the specially prepared composite plasticizer and matching with the types and the dosage proportions of other components.
Description
Technical Field
The invention relates to a silane modified resin waterproof coating and a preparation method thereof, which are applied to the production field of waterproof coatings.
Background
The waterproof coating is a coating which can form a waterproof film with certain extensibility, elastoplasticity, crack resistance, impermeability and weather resistance on the surface of an object after being coated and cured so as to play roles of waterproofing, seepage prevention and protection. The waterproof coating is applied to the surface of a building to effectively prevent water erosion, so that the waterproof coating is welcomed, but the waterproof coating also has the defects of low strength, poor weather resistance and easy damage after coating, so that the waterproof effect is influenced. The waterproof coating on the market at present mainly comprises products such as polyurethane waterproof coating, acrylic waterproof coating, JS waterproof coating and the like. The polyurethane waterproof coating has excellent mechanical property and good waterproof property, but has poor weather resistance, and is easy to generate bubbles when being constructed in a high-temperature and high-humidity environment, so that the requirement on the drying degree of a base material to be constructed is high, and free isocyanate harmful to a human body can be released; the acrylic waterproof paint has good weather resistance and environmental protection, but the water resistance of the paint film is poor, and the construction is difficult under the conditions of low temperature and high humidity; the JS waterproof paint is easy to bond with a wet base layer, is convenient to construct, but also has the problems of difficult construction at low temperature and the like.
The silane modified polymer is a novel high molecular material and is generally divided into two categories of silane modified polyether and silane modified polyurethane. The main chain of the polymer is macromolecular polyether or polyurethane prepolymer and is formed by end capping with isocyanate silane or amino silane, and the curing mechanism is moisture curing and generates a cross-linked network structure by reacting with external moisture. The silane modified paint prepared by the silane modified polymer has good strength and weather resistance. In order to improve the high strength and high thixotropy of the silane modified coating, people usually adopt a method of increasing the addition amount of the filler, which can fully utilize the reinforcing effect of the filler, but therefore, the prepared silane modified coating has higher viscosity and is not beneficial to construction operation.
Therefore, it is desirable to provide a silane modified resin waterproof coating material which has good strength and weather resistance, low viscosity and easy application, and a preparation method thereof.
Disclosure of Invention
In order to overcome the defects that the existing silane modified coating has good strength and weather resistance at the same time, but has high viscosity and is not beneficial to construction operation, the invention provides the silane modified resin waterproof coating and the preparation method thereof.
The technical scheme of the invention is as follows:
the silane modified resin waterproof coating is mainly prepared from the following components in parts by weight:
40-70 parts of composite plasticizer
204 portions of filler 126
8-12 parts of thixotropic agent
Silane modified polymer resin 100 parts
8-12 parts of coupling agent
8-12 parts of light stabilizer
3-5 parts of a catalyst;
the composite plasticizer is mainly prepared by polymerizing the following components in parts by weight:
90-110 parts of synthetic vegetable ester
25-40 parts of acetyl tributyl citrate
5-8 parts of dioctyl phthalate
20-30 parts of polyethylene glycol
0.5-1 part of dibutyltin dilaurate.
The silane modified resin waterproof coating adopts a special composite plasticizer, and the composite plasticizer is formed by polymerizing synthetic resin, dioctyl phthalate, polyethylene glycol and acetyl tributyl citrate under the action of a catalyst dibutyltin dilaurate. The generated composite plasticizer greatly improves the mobility of resin molecular bonds, reduces the crystallinity of the resin molecules, increases the plasticity of the resin molecules, reduces the processing temperature of the waterproof coating, shortens the stirring time by mixing under a vacuum condition, and still has excellent mechanical properties and higher elongation. The optimized composite plasticizer has better plasticizing effect than that of simple mixing of a single component or four components (synthetic resin ester, dioctyl phthalate, polyethylene glycol and acetyl tributyl citrate), and improves the compatibility among the components of the waterproof coating, so that the waterproof coating has better mechanical strength and flexibility. In addition, in the use process of the waterproof coating, the composite plasticizer is not easy to escape from the coating, so that the service life and the effect of the waterproof coating are improved. The silane modified polymer resin is prepared by adopting a micromolecular siloxane end-capping mode, the silicon content in the structure of the silane modified polymer resin is greatly improved, the number of Si-O bonds is also greatly increased, and the Si-O bond energy is greater than the C-C bond energy, so that the silane modified polymer resin has excellent heat resistance and weather resistance. And the water repellency of silicon is good, so that the water absorption of the waterproof coating is low. The composite plasticizer has good compatibility with the silane modified polymeric resin, so that the overall viscosity of the waterproof coating is reduced, other components are uniformly dispersed, the tensile property of the waterproof coating is improved, and the waterproof coating has excellent leveling property. Meanwhile, the synthetic vegetable ester is an environment-friendly plasticizer, so that the using amount of dioctyl phthalate can be reduced in the preparation of the composite plasticizer, and therefore, the silane modified resin waterproof coating has high environmental protection property. The silane modified resin waterproof coating has the advantages of high curing rate in the bonding process, excellent water resistance, bonding force and bonding strength, low viscosity, easiness in construction, and good economic value and social value.
The filler is one or any combination of more than two of heavy calcium, calcium hydrogen, barium sulfate, carbon black or titanium dioxide.
The preferred filler can improve the strength of the silane modified resin waterproof coating.
The thixotropic agent is air silicon or carbon black.
The preferable thixotropic agent can further reduce the viscosity of the silane modified resin waterproof coating and improve the workability.
The coupling agent is any one of KH-175, A-174 or SH-6030.
The preferable coupling agent can improve the strength of the silane modified resin waterproof coating.
The light stabilizer is any combination of titanium dioxide and an ultraviolet absorbent UV-O or any combination of titanium dioxide and an ultraviolet absorbent UV-9.
The preferable light stabilizer can improve the weather resistance of the silane modified resin waterproof coating.
The catalyst is dibutyltin dilaurate or dibutyltin bisacetylacetonate.
The optimized catalyst has high catalytic efficiency, and can integrally improve the strength of the silane modified resin waterproof coating.
The preparation method of the silane modified resin waterproof coating is characterized by comprising the following steps: mainly comprises the following steps which are carried out in sequence:
(1) preparing a composite plasticizer: adding synthetic vegetable ester into polyethylene glycol, uniformly mixing, heating to 40-50 ℃, adding dibutyltin dilaurate and acetyl tributyl citrate into the mixture, stirring for 25-35 min, adding dioctyl phthalate, and stirring for 1-2 h to obtain the composite plasticizer;
(2) adding a composite plasticizer, a filler and a thixotropic agent into a container, stirring for 1-2 hours at the temperature of 100-120 ℃ and the vacuum degree of-0.08 MPa-0.09 MPa, cooling to 20-30 ℃, and relieving vacuum;
(3) adding silane modified polymer resin into the mixture obtained in the step (2), and stirring for 30-45 min at 20-30 ℃ under normal pressure;
(4) and (3) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (3), dispersing and mixing for 25-35 min, stirring for 5-10 min under the condition that the vacuum degree is-0.08 MPa-0.09 MPa, and finally releasing the vacuum to obtain the high-strength silane modified resin waterproof coating.
The preparation method of the preferred silane modified resin waterproof coating is simple and convenient and easy to operate. The optimized working procedures and technological parameters can integrally improve the strength, weather resistance and workability of the silane modified resin waterproof coating.
Compared with the prior art, the method has the following advantages:
1) the silane modified resin waterproof coating adopts the specially prepared composite plasticizer, and is matched with other component types and the dosage proportion thereof, so that the silane modified resin waterproof coating has good strength and weather resistance, simultaneously reduces the viscosity, and improves the construction performance of the coating;
2) the preparation method of the silane modified resin waterproof coating is simple and convenient, the operation is easy, and the optimized working procedures and technological parameters can integrally improve the strength, weather resistance and construction performance of the silane modified resin waterproof coating.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the embodiments of the specification.
Example 1
The silane modified resin waterproof coating is mainly prepared from the following components: composite plasticizer, filler, thixotropic agent, silane modified polymer resin, coupling agent, light stabilizer and catalyst; the composite plasticizer is mainly prepared by polymerizing the following components: synthetic vegetable esters, acetyl tributyl citrate, dioctyl phthalate, polyethylene glycol and dibutyltin dilaurate.
The preparation method of the silane modified resin waterproof coating mainly comprises the following steps of:
(1) preparing a composite plasticizer: adding 100g of synthetic vegetable ester into 30g of polyethylene glycol, uniformly mixing, heating to 50 ℃, adding 1g of dibutyltin dilaurate and 40g of acetyl tributyl citrate into the mixture, stirring for 30min, adding 5g of dioctyl phthalate, and stirring for 1h to obtain the composite plasticizer;
(2) adding 400g of composite plasticizer, 1kg of heavy calcium, 260g of calcium hydrogen and 80g of thixotropic agent gas silicon into a container, stirring for 2 hours at the temperature of 100 ℃ and the vacuum degree of-0.08 MPa, cooling to 25 ℃, and removing the vacuum;
(3) adding 1kg of silane modified polymer resin into the mixture obtained in the step (2), and stirring for 45min at the temperature of 25 ℃ and under the normal pressure;
(4) and (3) adding 80g of coupling agent KH-175, 120g of light stabilizer and 50g of catalyst dibutyltin dilaurate into the mixture obtained in the step (3), dispersing and mixing for 30min, stirring for 5min under the condition that the vacuum degree is-0.08 MPa, and finally relieving the vacuum to obtain the high-strength silane modified resin waterproof coating.
The light stabilizer is formed by mixing titanium dioxide and an ultraviolet absorbent UV-O according to the mass ratio of 3: 1.
Example 2
The silane modified resin waterproof coating is mainly prepared from the following components: composite plasticizer, filler, thixotropic agent, silane modified polymer resin, coupling agent, light stabilizer and catalyst; the composite plasticizer is mainly prepared by polymerizing the following components: synthetic vegetable esters, acetyl tributyl citrate, dioctyl phthalate, polyethylene glycol and dibutyltin dilaurate.
The preparation method of the silane modified resin waterproof coating mainly comprises the following steps of:
(1) preparing a composite plasticizer: adding 90g of synthetic vegetable ester into 20g of polyethylene glycol, uniformly mixing, heating to 40 ℃, adding 0.5g of dibutyltin dilaurate and 25g of acetyl tributyl citrate into the mixture, stirring for 35min, adding 8g of dioctyl phthalate, and stirring for 2h to obtain the composite plasticizer;
(2) adding 700g of composite plasticizer, 1.04kg of barium sulfate, 1kg of calcium hydrogen and 120g of thixotropic agent carbon black into a container, stirring for 1h at the temperature of 120 ℃ and the vacuum degree of-0.09 MPa, cooling to 20 ℃, and removing the vacuum;
(3) adding 1kg of silane modified polymer resin into the mixture obtained in the step (2), and stirring for 30min at 20 ℃ under normal pressure;
(4) and (3) adding 120g of coupling agent A-174, 80g of light stabilizer and 30g of catalyst dibutyltin bisacetylacetonate into the mixture obtained in the step (3), dispersing and mixing for 35min, stirring for 10min under the condition that the vacuum degree is-0.09 MPa, and finally releasing the vacuum to obtain the high-strength silane modified resin waterproof coating.
The light stabilizer is formed by mixing titanium dioxide and an ultraviolet absorbent UV-9 according to the mass ratio of 2: 1.
Example 3
The silane modified resin waterproof coating is mainly prepared from the following components: composite plasticizer, filler, thixotropic agent, silane modified polymer resin, coupling agent, light stabilizer and catalyst; the composite plasticizer is mainly prepared by polymerizing the following components: synthetic vegetable esters, acetyl tributyl citrate, dioctyl phthalate, polyethylene glycol and dibutyltin dilaurate.
The preparation method of the silane modified resin waterproof coating mainly comprises the following steps of:
(1) preparing a composite plasticizer: adding 110g of synthetic vegetable ester into 25g of polyethylene glycol, uniformly mixing, heating to 45 ℃, adding 0.9g of dibutyltin dilaurate and 36g of acetyl tributyl citrate into the mixture, stirring for 25min, adding 6g of dioctyl phthalate, and stirring for 1.5h to obtain the composite plasticizer;
(2) adding 500g of composite plasticizer, 1.5kg of filler carbon black and 120g of thixotropic agent gas silicon into a container, stirring for 1.5h under the conditions that the temperature is 110 ℃ and the vacuum degree is-0.085 MPa, then cooling to 30 ℃, and removing the vacuum;
(3) adding 1kg of silane modified polymer resin into the mixture obtained in the step (2), and stirring for 40min at the temperature of 30 ℃ and under the normal pressure;
(4) and (3) adding 100g of coupling agent SH-6030 and 20g of catalyst dibutyltin bisacetylacetonate into the mixture obtained in the step (3), dispersing and mixing for 25min, stirring for 8min under the condition that the vacuum degree is-0.085 MPa, and finally removing the vacuum to obtain the high-strength silane modified resin waterproof coating.
The light stabilizer is prepared by mixing titanium dioxide and an ultraviolet absorbent UV-9 according to the mass ratio of 1: 1.
The relevant information of the raw materials and the equipment in the embodiments:
silane-modified polymer resin: SPUR 1015LM, advanced new materials group of mai map;
synthesizing plant ester: manufactured by eagle specializers, Suzhou, Inc.
Experimental data:
and (3) comparison: existing polyurethane resin waterproof coating
The preparation method of the control sample comprises the following steps: mainly comprises the following steps which are carried out in sequence: adding 500g of dioctyl phthalate, 1.5kg of carbon black and 120g of thixotropic agent gas silicon into a container, stirring for 2 hours at the temperature of 110 ℃ and the vacuum degree of-0.08 MPa, cooling to the normal temperature of 23-25 ℃, and removing vacuum; then adding 1kg of waterborne polyurethane resin into the mixture, and continuously stirring for 60min at normal temperature and normal pressure; then 100g of coupling agent SH-6030, 90g of ultraviolet absorbent UV-9 and 35g of catalyst dibutyltin bis (acetyl acetonate) are added into the mixture, and after dispersion and mixing are carried out for 30min, the mixture is stirred for 10min under the vacuum degree of-0.08 MPa. Finally, the vacuum is relieved, and the existing polyurethane resin waterproof coating is obtained.
Wherein the aqueous polyurethane resin is Impranil DL 1554 which is a Kostew aqueous polyurethane resin.
The detection method comprises the following steps:
after the paint products of examples 1 to 3 and the control were sealed and left for 24 hours, the paint was applied to a mold to form a coating film having a thickness of about 1.5mm, and the film was cured under standard test conditions (23 ℃. + -. 2 ℃ C., 50% relative humidity) for 7 days, and then each parameter was measured. The test method of tensile strength and elongation at break refers to the dumbbell I type specified in GB/T528, the test method of tear strength refers to the non-cutting right-angle shape specified in GB/T529-2008, the test method of heat resistance refers to the specification of 9.2.2 in GB/T16777-2008, and the test method of weather resistance refers to the specification of 6.6 method A cycle 1 in GB/T16422.3-2014. Method for testing viscosity parameters: and (3) placing the sample to be tested in a standard test environment (23 +/-2 ℃ and 50% relative humidity) for 24 hours in a sealed manner, and then performing viscosity test in the standard test environment by adopting a Brookfield rotary viscometer. The specific test results are as follows:
TABLE 1 detection results of the silane modified resin waterproof coating performance of each example
From the test results of the above table, the tensile strength, the tear strength and the elongation at break of the silane modified resin waterproof coating are obviously improved compared with those of a control sample, and the silane modified resin waterproof coating has lower viscosity and obviously improves the construction performance. In addition, the heat resistance, the weather resistance and the leveling property of the material all reach the standard of a control sample.
The silane modified resin waterproof coating material and the preparation method thereof according to the present invention are not limited to the above-mentioned examples, and any modification or replacement according to the principle of the present invention should be within the scope of the present invention.
Claims (7)
1. A silane modified resin waterproof coating is characterized in that: the composition is mainly prepared from the following components in parts by weight:
40-70 parts of composite plasticizer
204 portions of filler 126
8-12 parts of thixotropic agent
Silane modified polymer resin 100 parts
8-12 parts of coupling agent
8-12 parts of light stabilizer
3-5 parts of a catalyst;
the composite plasticizer is mainly prepared by polymerizing the following components in parts by weight:
90-110 parts of synthetic vegetable ester
25-40 parts of acetyl tributyl citrate
5-8 parts of dioctyl phthalate
20-30 parts of polyethylene glycol
0.5-1 part of dibutyltin dilaurate.
2. The silane-modified resin waterproof coating material according to claim 1, characterized in that: the filler is one or any combination of more than two of heavy calcium, calcium hydrogen, barium sulfate, carbon black or titanium dioxide.
3. The silane-modified resin waterproof coating material according to claim 1, characterized in that: the thixotropic agent is air silicon or carbon black.
4. The silane-modified resin waterproof coating material according to claim 1, characterized in that: the coupling agent is any one of KH-175, A-174 or SH-6030.
5. The silane-modified resin waterproof coating material according to claim 1, characterized in that: the light stabilizer is any combination of titanium dioxide and an ultraviolet absorbent UV-O or any combination of titanium dioxide and an ultraviolet absorbent UV-9.
6. The silane-modified resin waterproof coating material according to claim 1, characterized in that: the catalyst is dibutyltin dilaurate or dibutyltin bisacetylacetonate.
7. The method for producing the silane-modified resin waterproof coating material according to any one of claims 1 to 6, characterized in that: mainly comprises the following steps which are carried out in sequence:
(1) preparing a composite plasticizer: adding synthetic vegetable ester into polyethylene glycol, uniformly mixing, heating to 40-50 ℃, adding dibutyltin dilaurate and acetyl tributyl citrate into the mixture, stirring for 25-35 min, adding dioctyl phthalate, and stirring for 1-2 h to obtain the composite plasticizer;
(2) adding a composite plasticizer, a filler and a thixotropic agent into a container, stirring for 1-2 hours at the temperature of 100-120 ℃ and the vacuum degree of-0.08 MPa-0.09 MPa, cooling to 20-30 ℃, and relieving vacuum;
(3) adding silane modified polymer resin into the mixture obtained in the step (2), and stirring for 30-45 min at 20-30 ℃ under normal pressure;
(4) and (3) adding a coupling agent, a light stabilizer and a catalyst into the mixture obtained in the step (3), dispersing and mixing for 25-35 min, stirring for 5-10 min under the condition that the vacuum degree is-0.08 MPa-0.09 MPa, and finally releasing the vacuum to obtain the high-strength silane modified resin waterproof coating.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113930147A (en) * | 2021-11-12 | 2022-01-14 | 上海三棵树防水技术有限公司 | Silane modified aliphatic epoxy resin waterproof coating and preparation method thereof |
| CN114410199A (en) * | 2022-02-24 | 2022-04-29 | 山东崇舜新材料科技有限公司 | Low-viscosity silane modified waterproof coating and preparation method thereof |
| CN114574018A (en) * | 2021-12-24 | 2022-06-03 | 上海三棵树防水技术有限公司 | Silane modified waterproof coating non-exposed roof waterproof construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930147A (en) * | 2021-11-12 | 2022-01-14 | 上海三棵树防水技术有限公司 | Silane modified aliphatic epoxy resin waterproof coating and preparation method thereof |
| CN114574018A (en) * | 2021-12-24 | 2022-06-03 | 上海三棵树防水技术有限公司 | Silane modified waterproof coating non-exposed roof waterproof construction method |
| CN114574018B (en) * | 2021-12-24 | 2022-12-06 | 上海三棵树防水技术有限公司 | Silane modified waterproof coating non-exposed roof waterproof construction method |
| CN114410199A (en) * | 2022-02-24 | 2022-04-29 | 山东崇舜新材料科技有限公司 | Low-viscosity silane modified waterproof coating and preparation method thereof |
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