CN111778729A - Organic silicon composition for improving waterproof effect of fabric surface and preparation method and application thereof - Google Patents
Organic silicon composition for improving waterproof effect of fabric surface and preparation method and application thereof Download PDFInfo
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- CN111778729A CN111778729A CN202010687008.5A CN202010687008A CN111778729A CN 111778729 A CN111778729 A CN 111778729A CN 202010687008 A CN202010687008 A CN 202010687008A CN 111778729 A CN111778729 A CN 111778729A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
- D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
- D06M2200/10—Repellency against liquids
- D06M2200/12—Hydrophobic properties
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Abstract
The invention discloses an organic silicon composition for improving the surface waterproof effect of a fabric, a preparation method thereof and application of the organic silicon composition in improving the surface waterproof effect of the fabric. The organic silicon composition comprises raw materials of dimethyl silicone polymer with end-capped double-end hydroxyl groups, dimethyl silicone polymer with molecules containing silicon vinyl functional groups, organic silicon resin with molecules containing silicon vinyl functional groups, dimethyl silicone polymer with molecules containing silicon hydrogen functional groups, an inhibitor, an organic solvent and a platinum catalyst, and can be obtained by directly and uniformly mixing the raw materials. The organic silicon composition can be diluted by using a low-boiling-point organic solvent and can also be emulsified by adding water and diluted for use. After the organic silicon composition is heated and cured, the organic silicon composition has strong adhesive force with the surface of the fabric, and effectively improves the washing resistance times of the fabric.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to an organic silicon composition for improving the waterproof effect of the surface of a fabric, and a preparation method and application thereof.
Background
The surface of the base material of various fabrics contains a large amount of hydrophilic hydroxyl groups, and the existence of the hydroxyl groups enables the surfaces of the fabrics and various clothes and appliances obtained by further processing the fabrics to be easily soaked by water, so that the fabrics and various processing products thereof are weighted after contacting with the water and polluted by toxic and harmful substances dissolved in the water, thereby causing harm to the health of human beings. In order to avoid the harm, human beings invent fluorine-containing fabric finishing agents, the extremely low surface tension of the surface of an organic fluorine material and the large surface contact angle between organic fluoride and water are utilized, so that the fabric surface has a hydrophobic effect similar to the lotus leaf surface, and various fabrics, various clothes and appliances with excellent surface waterproof effect are prepared, and the main component of the fluorine-containing fabric finishing agents is perfluorooctyl sulfonic acid.
With the increasing concern on health and environment and the progress of environmental science and technology since the 90 s of the last century, the harm of various fluorine-containing compounds such as fluorine-containing refrigerants, fluorine-containing detergents, fluorine-containing surface treatment agents and the like to human living environment and atmosphere has attracted extensive attention of international society. In the stockholm convention on persistent organic pollutants, issued on 26.8.2010, perfluorooctylsulfonic acid and its salts and perfluorooctylsulfonyl chloride have been specifically listed in the newly added regulatory list; heretofore, according to the requirements of the montreal protocol, HCFCs-type second-generation fluorine-containing refrigerants represented by R22 and HFCs-type third-generation fluorine-containing refrigerants represented by R32 have been put into a phase-out sequence because of their high ODP values or GWP values.
In order to solve the persistent harm of the fluorine-containing fabric finishing agent to the environment, foreign companies such as American 3M, German Rudaff, Hensmei and the like successively develop fluorine-free waterproof agents, the fluorine-free waterproof agents do not contain compounds with persistent harm to the environment such as PFOS, PFOA, APEO and the like, are not easy to deposit in organisms and degrade in the manufacturing and using processes, and are regarded as safe and environment-friendly products harmless to human bodies, the fluorine-free waterproof agents can be used independently, and can also be used in a form of a waterproof synergist in a compounding manner with other components, so that the waterproof grade of the fabric can be effectively improved, and the fluorine-free waterproof agent presents better compatibility. However, the current fluorine-free fabric waterproof agent still has the defects of poor oil resistance, weak universality, poor effect stability, harsh use conditions and the like, and particularly requires that the treated fabric does not contain impurities and has strict requirements on the pH value of the fabric, so that the application range and the application effect of the fluorine-free fabric waterproof agent are limited by the defects.
In order to solve the performance defects of the existing fluorine-free fabric waterproof agent, Chinese invention patent CN 107558237A discloses an organosilicon waterproof agent for fabric finishing and a preparation method thereof, wherein the organosilicon waterproof agent comprises hydroxyl silicone oil, hydrogen-containing silicone oil, hydroxyl-terminated polymethylvinylsiloxane, a cationic surfactant, a dehydrogenation reaction inhibitor, a pH regulator, deionized water and the like, and the obtained organosilicon waterproof agent has excellent waterproof effect and good stability and is suitable for various fiber fabrics. As is well known, the cohesive energy density of the organosilicon polymer material is small, and the mechanical property of the organosilicon material without reinforcement is poor, for example, the tensile strength of the organosilicon polymer without reinforcement is only 0.4MPa, and the organosilicon polymer can only be applied to the application fields such as encapsulation of electronic components and the like which have low requirements on the mechanical property. The flexibility and low strength of silicone materials often preclude durable water repellency. Although the organic silicon material as the fabric waterproof agent does not require excessively high mechanical properties, the organic silicon material for fabric waterproofing is required to have not only a large water contact angle but also strong adhesion and washing resistance between the organic silicon material and the fabric because of long-term contact with water (such as washing).
Disclosure of Invention
In order to overcome the defects of poor effect stability, harsh use conditions and insufficient water washing resistance of a fluorine-free fabric waterproof agent and the existing organic silicon fabric waterproof agent, the invention provides an organic silicon composition for improving the waterproof effect of the fabric surface. According to the invention, the resin phase is introduced into the polymer matrix, and the organosilicon polymer is reinforced by utilizing the good compatibility between the organosilicon resin and the organosilicon polymer material and the interaction between the organosilicon resin and the organosilicon polymer material, so that the high water contact angle performance of the organosilicon material is maintained, the interface strength between the fabric and the organosilicon waterproofing agent is effectively improved, and the retention period of the organosilicon waterproofing effect is prolonged.
An organosilicon composition for improving the surface waterproof effect of fabric comprises the following raw materials in percentage by mass:
platinum catalyst, the mass of platinum element is 3.0 × 10 of the total mass of the raw materials-6～50.0×10-6；
The viscosity of the double-end hydroxyl-terminated polydimethylsiloxane at 25 ℃ is η2515 to 25mPa.s, and the hydroxyl content is 6.0 to 9.0 weight percent;
the viscosity of the polydimethylsiloxane containing silicon vinyl functional groups in the molecule is η at 25 DEG C25100 to 8000mPa.s, the vinyl content is 0.1 to 10.0 weight percent, and the vinyl-containing polymer is at least one selected from dimethyl vinyl siloxane-terminated polydimethylsiloxane at double ends, dimethyl vinyl siloxane-terminated poly (dimethyl-methyl vinyl) siloxane copolymer at double ends, trimethyl siloxane-terminated poly (dimethyl-methyl vinyl) siloxane copolymer at double ends and dimethyl vinyl siloxane-terminated poly (dimethyl-methyl vinyl) siloxane copolymer at single ends;
the organic silicon resin containing silicon vinyl functional groups in molecules is liquid at room temperature, and has the viscosity of η at 25 DEG C25800-12000 mPa.s, the vinyl content is 0.05-2.0 wt%, and the resin is at least one of vinyl MQ resin, vinyl T-type silicon resin, vinyl MDQ-type silicon resin and vinyl MTQ-type silicon resin;
the viscosity of the polydimethylsiloxane containing a silicon-hydrogen functional group in a molecule is η at 25 DEG C255.0 to 50.0mPa.s, 0.1 to 1.6 wt% of hydrogen, selected from bis-end dimethyl-hydrosiloxy-terminated polydimethylsiloxane, bis-end dimethyl-hydrosiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer, and bis-end trimethylsiloxy-terminated poly (dimethyl-methyl-silyl)At least one of a monohydroxy) siloxane copolymer, a single-ended dimethylhydrogensiloxy terminated poly (dimethyl-methylhydrogen) siloxane copolymer;
the inhibitor is selected from at least one of ethynyl cyclohexanol, maleic acid ester, fumaric acid ester, triphenyl phosphite and triethyl phosphite;
the organic solvent is at least one of petroleum ether, alkane, aliphatic olefin, aliphatic saturated ester compounds and aliphatic saturated ketone compounds.
In order to solve the technical problems to be solved by the invention and improve the water washing resistance of the organosilicon waterproofing agent while keeping a high water contact angle, the limitations of the components (such as the introduction of the vinyl organosilicon resin component), the proportion, the parameters, the conditions and the like listed above are necessary and indispensable.
In order to better solve the technical problems, the invention adopts the following preferred technical scheme:
preferably, the mass of the double-end hydroxyl-terminated polydimethylsiloxane is 0.25 to 1.25 percent of the total mass of the raw materials.
Preferably, the polydimethylsiloxane having a silicon vinyl functional group in the molecule has a viscosity of η at 25 ℃25300 to 4000mPa.s, a vinyl content of 0.2 to 8.0 wt%, and at least one selected from a dimethylvinylsiloxy-terminated polydimethylsiloxane-both end, and a dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer-both end;
the mass of the polydimethylsiloxane containing silicon vinyl functional groups in the molecules is 3-15% of the total mass of the raw materials.
Preferably, the silicone resin having a silicon vinyl functional group in the molecule has a viscosity of η at 25 ℃251200-10000 mPa.s, the vinyl content is 0.1-1.0 wt%, and the resin is at least one of liquid vinyl MQ resin and liquid vinyl T-type silicon resin;
the mass of the organic silicon resin containing silicon-vinyl functional groups in the molecules is 1-10% of the total mass of the raw materials.
Preferably, the polydimethylsiloxane containing a silicon-hydrogen functional group in the molecule has a viscosity of η at 25 DEG C2515.0 to 45.0mPa.s, 0.2 to 1.5 weight percent of hydrogen, and at least one selected from a bis-end-dimethylhydrogensiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer and a bis-end-trimethylsiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer;
the mass of the polydimethylsiloxane containing the silicon-hydrogen functional group in the molecule is 0.1-10% of the total mass of the raw materials.
Preferably, the inhibitor is selected from at least one of ethynylcyclohexanol, triethyl phosphite, triphenyl phosphite and maleate;
the mass of the inhibitor is 0.05-0.25% of the total mass of the raw materials.
Preferably, the organic solvent has a boiling point of less than 180 ℃ at normal pressure, and is selected from at least one of petroleum ether and aliphatic saturated esters;
the mass of the organic solvent is 72-90% of the total mass of the raw materials.
Further preferably, the organic solvent is aliphatic saturated ester, and the boiling point at normal pressure is less than 150 ℃;
the mass of the organic solvent is 75-85% of the total mass of the raw materials.
Preferably, the mass concentration of the platinum element in the platinum catalyst is 0.3-4.0%, and the platinum catalyst is selected from at least one of Speier catalyst (isopropanol solution of chloroplatinic acid) and Karstedt catalyst (vinyl siloxane complex of platinum).
More preferably, the platinum catalyst is Karstedt catalyst, the mass concentration of platinum element in the platinum catalyst is 0.6-3.0%, and the mass of the platinum element in the platinum catalyst is 7.0 × 10% of the total mass of the raw materials-6～20.0×10-6。
The invention also provides a preparation method of the organic silicon composition, which is characterized in that all the raw materials are stirred and mixed uniformly at room temperature or at the temperature lower than the boiling point of the inhibitor or the temperature lower than the boiling point of the organic solvent.
The invention also provides application of the organic silicon composition in improving the surface waterproof effect of the fabric.
The invention also provides a method for improving the waterproof effect of the surface of the fabric, which comprises the following steps:
(1) diluting the organic silicon composition with a solvent to obtain a mixed solution;
the solvent is at least one of water, petroleum ether, alkane, aliphatic olefin, aliphatic saturated ester compounds and aliphatic saturated ketone compounds;
(2) and immersing the fabric in the mixed solution, taking out the fabric after the fabric is fully soaked, draining the liquid, then placing the fabric at 100-180 ℃ for reaction and solidification for 1-5 min, and cooling to obtain the fabric with the waterproof surface.
After the organic silicon composition is heated and cured, the organic silicon composition has strong adhesive force with the surface of the fabric, and effectively improves the washing resistance times of the fabric.
Compared with the prior art, the invention has the main advantages that: according to the invention, the organosilicon resin containing silicon-vinyl functional groups is used for reinforcing the organosilicon polymer, so that the mechanical properties of the organosilicon polymer and the interface strength of the organosilicon polymer and a fabric substrate are improved, the high water contact angle of the organosilicon waterproofing agent is kept, the washing resistance times of the organosilicon waterproofing agent are effectively improved, and the service life of the organosilicon waterproofing agent is prolonged. The invention can replace fluorine-containing waterproofing agents such as perfluorooctyl sulfonic acid and the like, thereby avoiding the lasting harm to the environment, and overcoming the defects of insufficient oil resistance, poor universality and effect stability, strict requirements on the cleanliness and pH range of the cloth and the like of the current fluorine-free waterproofing agent.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer. The raw materials used in the following examples and comparative examples are commercially available or prepared by a conventional method. Unless otherwise specified, parts are parts by mass.
Comparative example 1
1 part of 25 ℃ viscosity (η)25) A double-terminal-hydroxyl-terminated polydimethylsiloxane having a hydroxyl content of 6.0% by weight and a viscosity at 25 ℃ of 25 parts (η)25) A dimethylvinylsiloxy-terminated polydimethylsiloxane having a vinyl content of 0.2% by weight and a viscosity at 25 ℃ of 3000.0mPa.s of 5 parts (η)25) The organic silicon composition is obtained by uniformly mixing 20.0mPa.s, 1.5 wt% hydrogen content of double-end dimethyl hydrogen siloxy terminated polydimethylsiloxane, 0.1 part of Karstedt catalyst with 0.75 wt% Pt content, 0.1 part of ethynyl cyclohexanol and 83.8 parts of ethyl acetate at room temperature by adopting mechanical stirring.
Comparative example 2
1 part of 25 ℃ viscosity (η)25) A terminal hydroxyl-terminated polydimethylsiloxane having a hydroxyl content of 7.0% by weight and a viscosity at 25 ℃ of 20.0mPa.s of 10 parts (η)25) A dimethylvinylsiloxy-terminated polydimethylsiloxane having a vinyl content of 0.3% by weight and a viscosity at 25 ℃ of 5 parts (η)25) 4000.0mPa.s, vinyl MQ resin with the vinyl content of 0.16 wt%, Spiere catalyst with the Pt content of 2.60 wt%, 0.1 part of dimethyl maleate and 83.8 parts of petroleum ether with the boiling range of 60-90 ℃ are mechanically stirred and uniformly mixed at room temperature to obtain the organic silicon composition.
Comparative example 3
1 part of 25 ℃ viscosity (η)25) 18.0 mPas, hydroxyl content 8.0 wt.% of a double-terminal-hydroxyl-terminated polydimethylsiloxane, 10 parts of a viscosity at 25 ℃ (η)25) A double-ended dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having a vinyl content of 5.0% by weight of 4000.0mPa.s, 5 parts of viscosity at 25 ℃ (η)25) 3500.0mPa.s methyl MQ resin, 5 parts of 25 ℃ viscosity (η)25) 30.0mPa.s, 0.25 wt% hydrogen content of double-end dimethyl hydrogen siloxy terminated polydimethylsiloxane, 0.1 part of Karstedt catalyst with 1.50 wt% Pt content, 0.1 part of triethyl phosphite and 83.8 parts of n-hexane are uniformly mixed by mechanical stirring at room temperature to obtain the catalystAn organosilicon composition.
Comparative examples 1 to 3 do not satisfy the limitations of the components (e.g., the vinyl silicone resin component introduced), the ratio, the parameters, the conditions, etc., which are necessary for solving the technical problems of the present invention, respectively.
Example 1
1 part of 25 ℃ viscosity (η)25) A double-terminal-hydroxyl-terminated polydimethylsiloxane having a hydroxyl content of 9.0% by weight and a viscosity at 25 ℃ of 15.0mPa.s of 10 parts (η)25) A dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having a vinyl content of 7.5% by weight of 3000.0mPa.s, 5 parts of viscosity at 25 ℃ (η)25) 8000.0 mPas, vinyl T-silicone with a vinyl content of 0.25 wt.%, 5 parts viscosity at 25 ℃ (η)25) The organosilicon composition was obtained by uniformly mixing 28.0mpa.s of a bis-terminal dimethylhydrogensiloxy terminated poly (dimethyl-methylhydrogen) siloxane copolymer having a hydrogen content of 1.2 wt%, 0.1 part of a Karstedt catalyst having a Pt content of 1.00 wt%, 0.1 part of ethynylcyclohexanol, and 83.8 parts of ethyl acetate at room temperature with mechanical stirring.
Example 2
1 part of 25 ℃ viscosity (η)25) 15.0 mPas, 9.0% by weight of hydroxy-terminated polydimethylsiloxane, 5 parts of 25 ℃ viscosity (η)25) A dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having a vinyl content of 3.0% by weight of 2000.0mPa.s, 5 parts of viscosity at 25 ℃ (η)25) 6000.0mPa.s, vinyl MDQ silicone resin having a vinyl content of 0.18% by weight, 5 parts viscosity at 25 ℃ (η)25) The organosilicon composition was obtained by uniformly mixing 32.0mpa.s of a bis-terminal dimethylhydrogensiloxy terminated poly (dimethyl-methylhydrogen) siloxane copolymer having a hydrogen content of 1.0 wt%, 0.1 part of a Karstedt catalyst having a Pt content of 1.20 wt%, 0.1 part of ethynylcyclohexanol, and 83.8 parts of ethyl acetate at room temperature with mechanical stirring.
Example 3
0.5 part of 25 ℃ viscosity (η)25) A double-terminal-hydroxyl-terminated polydimethylsiloxane having a hydroxyl content of 6.0% by weight and a viscosity at 25 ℃ of 25.5 parts (η)25) 300.0 mPas, vinyl content 5.0% by weight of a double-ended trimethylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer, 5 parts viscosity at 25 ℃ (η)25) 3500.0mPa.s vinyl MDQ silicone resin with a vinyl content of 0.20% by weight, 5 parts viscosity at 25 ℃ (η)25) 26.0mPa.s, 0.75 wt% of hydrogen, 0.20 wt% of Spiere catalyst at one end, 0.1 part of ethynylcyclohexanol and 83.8 parts of butyl acetate, and mechanically stirring at 40 ℃ to uniformly mix to obtain the organic silicon composition.
Example 4
0.3 part of 25 ℃ viscosity (η)25) A double-terminal-hydroxyl-terminated polydimethylsiloxane having a hydroxyl content of 7.0% by weight and a viscosity at 25 ℃ of 20.0mPa.s of 5.5 parts (η)25) 3500.0 mPas, terminal trimethylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having a vinyl content of 0.5% by weight, 8 parts of 25 ℃ viscosity (η)25) An ethylene-based MTD silicone resin having an ethylene content of 0.40 wt% of 1500.0mPa.s, 5.5 parts of 25 ℃ viscosity (η)25) A double-terminal trimethylsiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer having a hydrogen content of 1.0 wt% and 35.0mpa.s, 0.1 part of Karstedt's catalyst having a Pt content of 0.30 wt%, 0.1 part of triphenyl phosphite, and 83.8 parts of propyl acetate were uniformly mixed at room temperature by mechanical stirring to obtain an organosilicon composition.
Preparation of a test sample:
2 parts of the organosilicon compositions (organosilicon waterproofing agents) prepared according to the above proportions and examples are respectively taken, 8 parts of ethyl acetate is respectively added for dilution, after uniform stirring, the fabric sample piece to be tested is immersed in the mixed solution, after 30min, the fabric sample piece is taken out of the mixed solution, after liquid is drained, the fabric sample piece is put into an oven which is pre-kept at the constant temperature of 150 ℃ and is kept for 3min, then the sample piece is taken out, is put into a dryer for cooling to room temperature, and then water resistance and contact angle measurement are carried out.
And (3) testing water resistance:
after the fabric sample piece was fixed horizontally, 250mL of deionized water was sprayed evenly from a height of 30cm, and it was observed whether water penetrated the fabric. If there is no water penetration, the test is repeated until there is water penetration, and the number of repetitions is recorded.
Contact angle measurement:
using a contact angle tester, 0.3mL of deionized water was placed on the surface of the fabric, and the contact angle between the fabric and water was measured.
The test results for the silicone water repellent prepared in each comparative example and example are shown in table 1 below.
TABLE 1
| Sample name | Water contact Angle (°) | Maximum number of times of water resistance |
| Comparative example 1 | 106 | 10 |
| Comparative example 2 | 105 | 7 |
| Comparative example 3 | 104 | 15 |
| Example 1 | 106 | 50 |
| Example 2 | 106 | 55 |
| Example 3 | 105 | 48 |
| Example 4 | 105 | 45 |
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.
Claims (10)
1. The organic silicon composition for improving the waterproof effect of the fabric surface is characterized by comprising the following raw materials in percentage by mass:
platinum catalyst, the mass of platinum element is 3.0 × 10 of the total mass of the raw materials-6～50.0×10-6；
The viscosity of the double-end hydroxyl-terminated polydimethylsiloxane at 25 ℃ is η2515 to 25mPa.s, and the hydroxyl content is 6.0 to 9.0 weight percent;
the viscosity of the polydimethylsiloxane containing silicon vinyl functional groups in the molecule is η at 25 DEG C25100 to 8000mPa.s, a vinyl content of 0.1 to 10.0 wt%, selected from the group consisting of a dimethylvinylsiloxy-terminated polydimethylsiloxane having both ends, a dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having both ends, a trimethylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer having both ends, a dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane having one endAt least one of a copolymer;
the organic silicon resin containing silicon vinyl functional groups in molecules is liquid at room temperature, and has the viscosity of η at 25 DEG C25800-12000 mPa.s, the vinyl content is 0.05-2.0 wt%, and the resin is at least one of vinyl MQ resin, vinyl T-type silicon resin, vinyl MDQ-type silicon resin and vinyl MTQ-type silicon resin;
the viscosity of the polydimethylsiloxane containing a silicon-hydrogen functional group in a molecule is η at 25 DEG C255.0 to 50.0mPa.s, 0.1 to 1.6 weight percent of hydrogen, and at least one selected from dimethyl hydrogen siloxy-terminated polydimethylsiloxane double-end, dimethyl hydrogen siloxy-terminated poly (dimethyl-methyl hydrogen) siloxane copolymer double-end, trimethyl siloxy-terminated poly (dimethyl-methyl hydrogen) siloxane copolymer double-end and dimethyl hydrogen siloxy-terminated poly (dimethyl-methyl hydrogen) siloxane copolymer single-end;
the inhibitor is selected from at least one of ethynyl cyclohexanol, maleic acid ester, fumaric acid ester, triphenyl phosphite and triethyl phosphite;
the organic solvent is at least one of petroleum ether, alkane, aliphatic olefin, aliphatic saturated ester compounds and aliphatic saturated ketone compounds.
2. The silicone composition according to claim 1, wherein the mass of the double-terminal hydroxyl group-terminated polydimethylsiloxane is 0.25% to 1.25% of the total mass of the raw materials.
3. The silicone composition according to claim 1, wherein the polydimethylsiloxane having a silicon vinyl functional group in the molecule has a viscosity of η at 25 ℃25300 to 4000mPa.s, a vinyl content of 0.2 to 8.0 wt%, and at least one selected from a dimethylvinylsiloxy-terminated polydimethylsiloxane-both end, and a dimethylvinylsiloxy-terminated poly (dimethyl-methylvinyl) siloxane copolymer-both end;
the mass of the polydimethylsiloxane containing silicon vinyl functional groups in the molecules is 3-15% of the total mass of the raw materials.
4. The silicone composition according to claim 1, wherein the silicone resin having a silicon vinyl functional group in the molecule has a viscosity of η at 25 ℃251200-10000 mPa.s, the vinyl content is 0.1-1.0 wt%, and the resin is at least one of liquid vinyl MQ resin and liquid vinyl T-type silicon resin;
the mass of the organic silicon resin containing silicon-vinyl functional groups in the molecules is 1-10% of the total mass of the raw materials.
5. The silicone composition according to claim 1, wherein the polydimethylsiloxane having a hydrosilicon functional group in the molecule has a viscosity of η at 25 ℃2515.0 to 45.0mPa.s, 0.2 to 1.5 weight percent of hydrogen, and at least one selected from a bis-end-dimethylhydrogensiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer and a bis-end-trimethylsiloxy-terminated poly (dimethyl-methylhydrogen) siloxane copolymer;
the mass of the polydimethylsiloxane containing the silicon-hydrogen functional group in the molecule is 0.1-10% of the total mass of the raw materials.
6. The silicone composition of claim 1, wherein the inhibitor is selected from at least one of ethynylcyclohexanol, triethyl phosphite, triphenyl phosphite, and maleate;
the mass of the inhibitor is 0.05-0.25% of the total mass of the raw materials.
7. The silicone composition according to claim 1, wherein the organic solvent has an atmospheric boiling point of less than 180 ℃ and is at least one selected from the group consisting of petroleum ether and aliphatic saturated esters;
the mass of the organic solvent is 72-90% of the total mass of the raw materials.
8. The method for preparing the organosilicon composition according to any of claims 1 to 7, wherein the organosilicon composition is prepared by stirring and mixing all the raw materials uniformly at room temperature or below the boiling point temperature of the inhibitor or below the boiling point temperature of the organic solvent.
9. Use of the silicone composition according to any one of claims 1 to 7 for improving the water-repellent effect of a fabric surface.
10. A method for enhancing the water-repellent effect of a fabric surface, comprising the steps of:
(1) diluting the silicone composition according to any one of claims 1 to 7 with a solvent to obtain a mixed solution;
the solvent is at least one of water, petroleum ether, alkane, aliphatic olefin, aliphatic saturated ester compounds and aliphatic saturated ketone compounds;
(2) and immersing the fabric in the mixed solution, taking out the fabric after the fabric is fully soaked, draining the liquid, then placing the fabric at 100-180 ℃ for reaction and solidification for 1-5 min, and cooling to obtain the fabric with the waterproof surface.
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| CN114855462A (en) * | 2022-06-10 | 2022-08-05 | 杭州正立生物科技有限公司 | Water-based silicone resin composition and preparation method thereof |
| CN116731609A (en) * | 2023-07-25 | 2023-09-12 | 尚德环保科技有限公司 | Silicone rubber sound absorption coating and preparation method thereof |
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| CN114855462B (en) * | 2022-06-10 | 2023-02-07 | 杭州正立生物科技有限公司 | Water-based silicone resin composition and preparation method thereof |
| CN116731609A (en) * | 2023-07-25 | 2023-09-12 | 尚德环保科技有限公司 | Silicone rubber sound absorption coating and preparation method thereof |
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