CN108659628B - Silicone rubber modified styrene butadiene rubber strippable protective coating - Google Patents
Silicone rubber modified styrene butadiene rubber strippable protective coating Download PDFInfo
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- CN108659628B CN108659628B CN201810618397.9A CN201810618397A CN108659628B CN 108659628 B CN108659628 B CN 108659628B CN 201810618397 A CN201810618397 A CN 201810618397A CN 108659628 B CN108659628 B CN 108659628B
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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
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
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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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
A silicon rubber modified styrene-butadiene rubber strippable protective coating comprises the following components: 100 parts by weight of thermoplastic styrene-butadiene rubber, 100-200 parts by weight of solvent, 2-10 parts by weight of compatibilizer and 30-80 parts by weight of room temperature vulcanization type silicone rubber. The compatibilizer is prepared from phenyl siloxane and alkyl siloxane and plays a role in effectively promoting the compatibility of the silicon rubber and the styrene-butadiene rubber. The strippable protective coating combines the body strength of styrene butadiene rubber and the excellent adhesiveness, electrical property and water resistance of silicon rubber; the coating has excellent thixotropy and does not sag after being coated; the adhesive force with the metal base material is moderate, the stripping performance is good, the coating has no residue after stripping, and the coating is effectively used for the local temporary protection of various metal surfaces, and particularly meets the use of the temporary protection of metals in harsh environments such as micro-arc oxidation, chemical nickel plating process and the like.
Description
Technical Field
The invention discloses a silicon rubber modified styrene butadiene rubber strippable protective coating, and relates to the field of sealing coatings.
Background
The strippable protective coating is a sealing coating with a temporary protective effect, forms a strippable protective coating after being coated on the surface of a base material such as metal and the like, has the effects of dirt prevention, rust prevention, acid and alkali prevention and the like on the whole or partial surface of the base material, and is widely applied to the fields of local electroplating, micro-arc oxidation, chemical milling protection and the like. Common strippable protective coatings include neoprene, styrene butadiene rubber, butyl rubber, SBS thermoplastic elastomer and the like. The commercial SZS type butylbenzene strippable paint is prepared by blending butylbenzene rubber resin, plasticizer, pigment and organic solvent, and is used for temporary protection layers of metals such as stainless steel, aluminum alloy and the like. The patent CN 102492336B discloses a benzene-free, low-toxicity, non-combustible, non-explosive and strippable electroplating protective coating and a preparation method thereof, hydrogenated styrene-butadiene rubber is used as a base material, white carbon black, calcium carbonate and diatomite are used as fillers, open milling is carried out at 120 ℃, terpene resin and silicone resin are used for adjusting adhesion and stripping properties, chlorinated paraffin and tetrachloroethylene are used as solvents, and the electroplating protective coating is prepared by stirring.
The existing strippable protective coating is prepared from thermoplastic rubber, a solvent, a filler, tackifying resin and other auxiliaries, and has certain limitations: (1) although the strength of the cured coating body is high, the crosslinking degree of the coating is low, and the medium resistance and the temperature resistance are not high; (2) the coating has good fluidity, is easy to flow after being coated on the corner part of the workpiece, has poor coating quality and can cause the problem of 'leakage corrosion' of the corner part. These problems are particularly acute in some harsh use environments. For example, in the micro-arc oxidation process of metals, the instantaneous high temperature and high pressure are generated on the surfaces of aluminum, magnesium, titanium and alloys thereof by means of arc discharge through the electrolyte under the conditions of high voltage of 500-1000V and large current of 100-200A, so that the ceramic film layer mainly comprising the matrix metal oxide can be generated; some localized plating processes involve high temperature resistant electroless nickel plating processes (chemical reaction of metal with nickel in aqueous solutions above 90 ℃). The existing strippable protective coating can not meet the requirements when being used for protection in the occasions, and the protective coating has the phenomena of electric breakdown, peeling, shrinkage and even shedding.
Disclosure of Invention
The invention relates to a silicon rubber modified styrene butadiene rubber strippable protective coating which comprises the following components: 100 parts by weight of thermoplastic styrene-butadiene rubber, 100-200 parts by weight of solvent, 2-10 parts by weight of compatibilizer and 30-80 parts by weight of room temperature vulcanization type silicone rubber.
The room temperature vulcanized silicone rubber has excellent electrical insulation performance and chemical stability, is water-resistant, ozone-resistant and weather-resistant and has good adhesion to various metal and non-metal materials, but when the room temperature vulcanized silicone rubber is directly used as a protective coating, the body strength is low, the adhesion performance is good, and the strippability is poor. The styrene butadiene rubber coating has high body strength and strong strippability, but has poor adhesive property with base materials such as metal and the like, and the coating is easy to peel and fall off and has weak protection. The invention aims to effectively combine the adhesive property of the silicon rubber and the body strength of the styrene butadiene rubber through a reasonable formula, so that the styrene butadiene rubber has excellent protection and stripping properties. But the styrene butadiene rubber and the silicon rubber have poor compatibility, and can be separated out by phase separation when being directly mixed, the compatibilizer is prepared, the compatibility problem is solved, and the silicon rubber particles are dispersed in the styrene butadiene rubber solution by controlling the particle size of dozens of nanometers through adjusting the dosage of the compatibilizer to form colloidal dispersion, so that the styrene butadiene rubber strippable protective coating modified by the silicon rubber has the non-flowability similar to yellow oil and has the characteristic of no sagging after coating.
A silicon rubber modified styrene-butadiene rubber strippable protective coating is prepared by the following steps:
a.100 parts by weight of thermoplastic styrene-butadiene rubber is dissolved in 100-200 parts by weight of solvent, and the mixture is stirred and mixed uniformly. Preferably, the solvent is one or a combination of two or more of toluene, xylene, naphthenic oil, pentanone, tetrahydrofuran, or cyclohexane.
B.1-3 parts by weight of diphenyldimethoxysilane, 1-2 parts by weight of aniline methyltriethoxysilane, 0.1-3 parts by weight of octyl trimethoxysilane and 0.1-2 parts by weight of butanone are mixed, then 0.01-0.08 part by weight of water is added, and the mixture is stirred and mixed for 0.5-1 hour at room temperature.
C.30-80 parts by weight of room temperature vulcanization type silicone rubber
And evenly mixing the A, B, C solution to prepare the silicon rubber modified styrene butadiene rubber strippable protective coating.
Instructions for use: before use, the surface of a base material to be protected is clean and is required to be anhydrous and oilless; preparing strippable protective paint in proportion, and painting the strippable protective paint on the surface of a base material, wherein the thickness is required to be more than 200 mu m; curing at room temperature for 2 days or at 60 deg.C for 6 hr or more.
The main properties are as follows: the tensile strength is 1.8-2.5 MPa, the elongation at break is 250-400%, the peel strength of the alloy and metals such as aluminum, copper or iron is 0.15-0.4 kN/m, and the peel strength is maintained at 0.15-0.3 kN/m after the alloy is soaked in water at 23 ℃ for 3 days or in water at 95 ℃ for 1 hour.
The invention has the beneficial effects that:
(1) the invention mixes a certain proportion of diphenyl dimethoxysilane, aniline methyl triethoxysilane and octyl trimethoxysilane, and carries out partial hydrolysis reaction at room temperature to prepare the compatibilizer. The compatibilizer contains phenyl and octyl and has good compatibility with styrene butadiene rubber; the siloxane group in the molecular structure has good compatibility with the silicon rubber. The compatibilizer is utilized to promote the effective combination of two different polarity materials of styrene butadiene rubber and silicon rubber to form uniform and stable strippable protective paint.
(2) The strippable protective coating combines the body strength of styrene butadiene rubber and the excellent adhesiveness, electrical property and water resistance of silicon rubber, has moderate adhesive force with a metal substrate and good strippability, and has no residue on a coating after stripping; the method is effectively used for the local temporary protection of various metal surfaces, and particularly meets the requirement of the temporary protection of metals in harsh environments such as micro-arc oxidation, chemical nickel plating process and the like.
(3) The strippable protective coating has excellent thixotropy, does not sag after being coated, meets the construction protection requirement of a vertical surface of a substrate, and particularly solves the problems that the conventional strippable protective coating is easy to sag after being coated on corner parts of a workpiece, the coating quality is poor, and the corner parts are subjected to 'leakage corrosion'.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example 1
A.100 parts by weight of thermoplastic styrene-butadiene rubber is added into a mixed solvent of 150 parts by weight of toluene and 30 parts by weight of xylene, and the mixture is stirred and mixed uniformly.
B.1 part by weight of diphenyldimethoxysilane, 2 parts by weight of aniline methyltriethoxysilane, 0.1 part by weight of octyltrimethoxysilane and 0.3 part by weight of methyl ethyl ketone were taken, mixed, added with 0.03 part by weight of water, and stirred and mixed at room temperature for 0.5 hour.
C.60 parts by weight of room temperature vulcanization type silicone rubber.
A, B, C solution is evenly mixed to prepare the silicon rubber modified styrene butadiene rubber strippable protective paint.
The main properties are as follows: the tensile strength of the bulk is 2.4MPa, the elongation at break is 350 percent, and the peel strength with an aluminum substrate is 0.24kN/m, and after the sample is respectively soaked in water at 23 ℃ for 7 days and water at 95 ℃ for 1 hour, the peel strength is 0.22kN/m and 0.20 kN/m.
Example 2
A.100 parts by weight of thermoplastic styrene-butadiene rubber is added into a mixed solvent of 70 parts by weight of toluene, 70 parts by weight of xylene and 60 parts by weight of cyclohexane, and the mixture is stirred and mixed uniformly.
B. 2 parts by weight of diphenyldimethoxysilane, 2 parts by weight of anilinomethyltriethoxysilane, 1 part by weight of octyltrimethoxysilane and 1 part by weight of methyl ethyl ketone were taken, and after mixing, 0.05 part by weight of water was added, and the mixture was stirred and mixed at room temperature for 0.5 hour.
C.70 parts by weight of room temperature vulcanization type silicone rubber.
A, B, C solution is evenly mixed to prepare the silicon rubber modified styrene butadiene rubber strippable protective paint.
The main properties are as follows: the tensile strength of the bulk is 2.2MPa, the elongation at break is 280%, and the peel strength with an aluminum substrate is 0.28kN/m, and after the sample is respectively soaked in water at 23 ℃ for 7 days and water at 95 ℃ for 1 hour, the peel strength is 0.24kN/m and 0.21 kN/m.
Claims (1)
1. The silicon rubber modified styrene butadiene rubber strippable protective coating comprises 100 parts by weight of thermoplastic styrene butadiene rubber and 100-200 parts by weight of solvent, and is characterized in that: 2-10 parts of a compatibilizer and 30-80 parts of room temperature vulcanization type silicone rubber; the solvent is one or a composition of more than two of toluene, xylene, naphthenic oil, pentanone, tetrahydrofuran or cyclohexane; the compatibilizer is prepared by mixing 1-3 parts by weight of diphenyldimethoxysilane, 1-2 parts by weight of aniline methyl triethoxysilane, 0.1-3 parts by weight of octyl trimethoxysilane, 0.1-2 parts by weight of butanone and 0.01-0.08 part by weight of water.
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| CN108659628B true CN108659628B (en) | 2020-06-16 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110452599B (en) * | 2019-08-30 | 2021-08-03 | 西安强微电气设备有限公司 | Protective coating for micro-arc oxidation and preparation method thereof |
| CN110863224B (en) * | 2019-11-22 | 2022-09-30 | 中国船舶重工集团公司第十二研究所 | Non-ferrous metal part micro-arc oxidation protective agent and local protection method |
| CN110904488B (en) * | 2019-12-09 | 2021-08-10 | 湖南湘投金天科技集团有限责任公司 | Micro-arc oxidation method and titanium alloy structural part obtained by adopting same |
| CN113725085B (en) * | 2021-08-31 | 2024-03-29 | 深圳技术大学 | Assembling process method of packaging part and packaging part |
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| CN103030828A (en) * | 2012-12-19 | 2013-04-10 | 华南理工大学 | Preparation method of rubber-based composite material with super-hydrophobic surface |
| CN105176403A (en) * | 2015-07-24 | 2015-12-23 | 中山市伯伦克专用化学产品有限公司 | High-temperature-resistant peelable blue glue |
| KR101730021B1 (en) * | 2016-03-07 | 2017-05-12 | 김희영 | Cold-resistant Coating Composition for Absorbing Infrared Rays |
| CN107109169A (en) * | 2015-01-08 | 2017-08-29 | 3M创新有限公司 | Moisture curable siloxanes composition |
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| US20140370279A1 (en) * | 2010-08-02 | 2014-12-18 | Novel Polymer Solutions Limited | Methods of coating a low surface energy substrate |
| JP2013018887A (en) * | 2011-07-12 | 2013-01-31 | Build Mentec Kk | Coating film peeling agent, and method for peeling coating film |
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| CN1721484A (en) * | 2004-07-13 | 2006-01-18 | 舟山市海山密封材料有限公司 | Rubber sealed and shock-reducing sound-absorbent material coated on metal sheet and method for preparing same |
| CN103030828A (en) * | 2012-12-19 | 2013-04-10 | 华南理工大学 | Preparation method of rubber-based composite material with super-hydrophobic surface |
| CN107109169A (en) * | 2015-01-08 | 2017-08-29 | 3M创新有限公司 | Moisture curable siloxanes composition |
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| KR101730021B1 (en) * | 2016-03-07 | 2017-05-12 | 김희영 | Cold-resistant Coating Composition for Absorbing Infrared Rays |
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