CN105238070A - One-component addition type liquid silicone rubber and preparation method thereof - Google Patents
One-component addition type liquid silicone rubber and preparation method thereof Download PDFInfo
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Abstract
The invention discloses one-component addition type liquid silicone rubber and a preparation method thereof. The one-component addition type liquid silicone rubber comprises the following raw materials in parts by mass: 100 parts of base rubber, 0.01-0.05 part of platinum catalyst, 1-5 parts of hydrogen-containing silicone oil and 0.02-0.1 part of inhibitor. The invention also discloses a preparation method of the one-component addition type liquid silicone rubber. The prepared one-component addition type liquid silicone rubber and the preparation method have the beneficial effects that one-component storage of the liquid silicone rubber is achieved by adding the reaction inhibitor; the liquid silicone rubber is unnecessary to be divided into components A and B; meanwhile, the liquid silicone rubber also has longer shelf life, high strength and good flowability and has industrial value; the preparation method is simple and practicable, is low in cost and is suitable for large-scale production.
Description
Technical field
The present invention relates to Silica hydrogel technical field, single component liquid silicon rubber that particularly a kind of storage characteristics is good and preparation method thereof
Background technology
Liquid silastic is also known as two component additive properties silicon rubber.Liquid silastic is a class organic silica gel of relative mixed milling type semi-solid state silicon rubber and common self cure single component silica gel, and this kind of glue has good fluidity, and sulfuration is fast, can casting can injection molding.Fluid silicone rubber is divided into again selfadhesive and the large class of non-self-adhesive two.Liquid-state silicon gel can ambient cure can hot setting.Hot setting can complete solidification process within the several seconds.
Liquid silastic generally needs to make AB two components for the ease of preserving, and during use, AB component is mixed generation crosslinking reaction by a certain percentage, obtains the goods needed.But do like this and greatly improve production cost.
Summary of the invention
The object of the invention is to provide a kind of single-component add-on type liquid silicon rubber and preparation method thereof, to solve the high problem of existing add-on type liquid silicon rubber production cost.
For solving the problem, the present invention by the following technical solutions:
A kind of single-component add-on type liquid silicon rubber, according to the mass fraction, its raw material is composed of the following components:
Wherein, described base glue is made up of according to mass ratio 100:20 ~ 40 vinyl silicone oil and MQ silicone resin; Described vinyl silicone oil is that viscosity is 500 ~ 1000mPa.s, vinyl mass content is the polysiloxane of the ethenyl blocking of 0.8 ~ 1.6% at 25 DEG C, and composition general formula is: R
2siO (SiRR ' O)
nsiR
2, wherein R is vinyl, and R ' is vinyl or methyl; Described MQ silicone resin be at 25 DEG C viscosity be 200 ~ 500mPa.s, vinyl mass content be 2.0 ~ 3.0% containing the MQ silicone resin of vinyl;
Described containing hydrogen silicone oil is that viscosity is 60 ~ 300mPa.s at 25 DEG C, and hydrogen mass content is the hydrogen containing siloxane of 0.1 ~ 1.5%.
Further, described vinyl silicone oil is prepared by following method: by octamethylcyclotetrasiloxane and tetramethyl divinyl disiloxane mixing, catalyzer Tetramethylammonium hydroxide is added under the state stirred, be warming up to 80 ~ 120 DEG C of polymerization 2 ~ 6h, be warming up to 150 ~ 200 DEG C again, de-low molecule 6 ~ 10h, obtains described vinyl silicone oil after cooling;
Wherein, the mass ratio of octamethylcyclotetrasiloxane, tetramethyl divinyl disiloxane, catalyzer Tetramethylammonium hydroxide is 100:0.1 ~ 3:0.01 ~ 0.5.
Further, described MQ silicone resin is prepared by following method:
(1) at 20 ~ 60 DEG C, be hydrolyzed in acid condition by water glass, then add tetramethyl divinyl disiloxane, hexamethyldisiloxane cohydrolysis 0.5 ~ 2h, backflow 2 ~ 6h synthesizes MQ extraction solution;
(2) after adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 2 ~ 6h under 80 ~ 150 DEG C of backflows;
(3) the MQ resin solution obtained is washed to neutrality, dry filter, underpressure distillation obtains described MQ resin;
Wherein, the mass ratio of water glass, tetramethyl divinyl disiloxane, hexamethyldisiloxane is 100:8 ~ 20:5 ~ 20.
Further, described containing hydrogen silicone oil is prepared by following methods: by hydrogen mass content be 1.5 ~ 1.6% high containing hydrogen silicone oil and octamethylcyclotetrasiloxane be added in reactor, add an acidic catalyst, stir, at the temperature of 40 ~ 80 DEG C, react 2 ~ 10h, stop stirring, filter, be warming up to 150 ~ 200 DEG C, de-low molecule 2 ~ 6h, obtains described containing hydrogen silicone oil after cooling;
Wherein, hydrogen mass content be 1.5 ~ 1.6% high containing hydrogen silicone oil, octamethylcyclotetrasiloxane, an acidic catalyst mass ratio be 100:50 ~ 150:15 ~ 30.
Further, described an acidic catalyst is atlapulgite or Zeo-karb.
Further, described platinum catalyst is synthesized by Platinic chloride and Virahol coordination, and platinum mass content is 500 ~ 3000ppm.
Further, described inhibitor is, and to be that 1 ~ 2:1 is composite modified under Platinic chloride effect in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin form.
The preparation method of above-mentioned single-component add-on type liquid silicon rubber, comprises the following steps:
(1) prepare base glue: 100 mass parts vinyl silicone oils are added stirring at room temperature 0.5 ~ 1h in kneader, the MQ silicone resin adding formula ratio 25% ~ 50% stirs 0.5 ~ 1h, then adds residue MQ silicone resin, continues stirring 3 ~ 5h, obtains base glue;
(2) 100 mass parts base glue, 0.01 ~ 0.05 mass parts platinum catalyst and 1 ~ 5 mass parts containing hydrogen silicone oil, 0.02 ~ 0.1 mass parts inhibitor are added in stirring tank, mix;
(3) liquid silastic prepared in step (2) is carried out molded vulcanization on vulcanizing press, obtain described single component liquid silicon rubber.
Further, in step (3), curing temperature is 100 ~ 140 DEG C, and curing time is 5 ~ 10min.
Beneficial effect of the present invention:
1, the single component liquid silicon rubber prepared of the present invention, by adding inhibitor, the storge quality of silicon rubber is promoted, being reduced to single-component from two component has again saved production cost simultaneously, has industrial value.
2, preparation method of the present invention is simple, with low cost, is applicable to large-scale production.
Embodiment
Below in conjunction with embodiment the present invention done and further explain.The following example only for illustration of the present invention, but is not used for limiting practical range of the present invention.
A kind of single-component add-on type liquid silicon rubber, according to the mass fraction, its raw material is composed of the following components:
Described base glue is made up of the vinyl silicone oil of 100 mass parts and the MQ silicone resin of 20 ~ 40 mass parts.Described vinyl silicone oil is that viscosity is 500 ~ 1000mPa.s, vinyl mass content is the polysiloxane of the ethenyl blocking of 0.8 ~ 1.6% at 25 DEG C, and composition general formula is: R
2siO (SiRR ' O)
nsiR
2, wherein R is vinyl, and R ' is vinyl or methyl.Preparation method is as follows: by 100 mass parts octamethylcyclotetrasiloxanes and the mixing of 0.1 ~ 3 mass parts tetramethyl divinyl disiloxane, 0.01 ~ 0.5 mass parts of catalyst Tetramethylammonium hydroxide is added under the state stirred, be warming up to 80 ~ 120 DEG C of polymerization 2 ~ 6h, be warming up to 150 ~ 200 DEG C again, de-low molecule 6 ~ 10h, obtains described vinyl silicone oil after cooling.Described MQ silicone resin be at 25 DEG C viscosity be 200 ~ 500mPa.s, vinyl mass content be 2.0 ~ 3.0% containing the MQ silicone resin of vinyl.Preparation method is as follows: (1) is at 20 ~ 60 DEG C, 100 mass parts water glass are hydrolyzed in acid condition, then add 8 ~ 20 mass parts tetramethyl divinyl disiloxanes, 5 ~ 20 mass parts hexamethyldisiloxane cohydrolysis 0.5 ~ 2h, backflow 2 ~ 6h synthesizes MQ extraction solution; (2) after adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 2 ~ 6h under 80 ~ 150 DEG C of backflows; (3) the MQ resin solution obtained is washed to neutrality, dry filter, underpressure distillation obtains described MQ resin.
Described platinum catalyst is synthesized by Platinic chloride and Virahol coordination, and platinum mass content is 500 ~ 3000ppm.Containing hydrogen silicone oil is that viscosity is 60 ~ 300mPa.s at 25 DEG C, and hydrogen mass content is the hydrogen containing siloxane of 0.1 ~ 1.5%.Preparation method is as follows: be that the high containing hydrogen silicone oil of 1.5 ~ 1.6% and the octamethylcyclotetrasiloxane of 50 ~ 150 mass parts are added in reactor by 100 mass parts hydrogen mass content, add 15 ~ 30 mass parts an acidic catalysts, stir, 2 ~ 10h is reacted at the temperature of 40 ~ 80 DEG C, stop stirring, filter, be warming up to 150 ~ 200 DEG C, de-low molecule 2 ~ 6h, obtains described containing hydrogen silicone oil after cooling.Described an acidic catalyst is atlapulgite or Zeo-karb.Described inhibitor is, and to be that 1 ~ 2:1 is composite modified under Platinic chloride effect in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin form.
The preparation method of above-mentioned single-component add-on type liquid silicon rubber is:
(1) prepare base glue: 100 mass parts vinyl silicone oils are added stirring at room temperature 0.5 ~ 1h in kneader, the MQ silicone resin adding formula ratio 25% ~ 50% stirs 0.5 ~ 1h, then adds residue MQ silicone resin, continues stirring 3 ~ 5h, obtains base glue;
(2) 100 mass parts base glue, 1 ~ 5 mass parts containing hydrogen silicone oil, 0.01 ~ 0.05 mass parts inhibitor add in stirring tank, mix;
(3) in step (2), add 0.01 ~ 0.05 mass parts platinum catalyst, mix;
(4) product is carried out molded vulcanization on vulcanizing press, curing temperature is 100 ~ 140 DEG C, and curing time is 5 ~ 10min, obtains described single component liquid silicon rubber.
Embodiment 1
The vinyl silicone oil that the present embodiment relates to is that at 25 DEG C, viscosity is 1000mPa.s, and vinyl mass content is the polysiloxane of the ethenyl blocking of 1.2%; MQ silicone resin is that at 25 DEG C, viscosity is 200mPa.s, and vinyl mass content is the MQ silicone resin containing vinyl of 2.5%; The platinum mass content of platinum catalyst is 2000ppm; Containing hydrogen silicone oil is that at 25 DEG C, viscosity is 300mPa.s, and hydrogen mass content is the hydrogen containing siloxane of 1.0%; Inhibitor is 1 ~ 2 composite modifiedly under Platinic chloride effect to form in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin.
Vinyl silicone oil preparation method is as follows: by 100 mass parts octamethylcyclotetrasiloxanes and the mixing of 3 mass parts tetramethyl divinyl disiloxanes, 0.03 mass parts of catalyst Tetramethylammonium hydroxide is added under the state stirred, be warming up to 120 DEG C of polymerization 2h, be warming up to 180 DEG C again, de-low molecule 8h, obtains described vinyl silicone oil after cooling.
Preparation method is as follows for MQ silicone resin: at 45 DEG C, is hydrolyzed in acid condition by 100 mass parts water glass, then adds 15 mass parts tetramethyl divinyl disiloxanes, 5 mass parts hexamethyldisiloxane cohydrolysis 1h, and backflow 6h synthesizes MQ extraction solution; After adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 2h under 120 DEG C of backflows; The MQ resin solution obtained is washed to neutrality, dry filter, and underpressure distillation obtains described MQ resin.
Containing hydrogen silicone oil preparation method is as follows: be that the high containing hydrogen silicone oil of 1.5% and the octamethylcyclotetrasiloxane of 50 mass parts are added in reactor by 100 mass parts hydrogen mass content, add 20 mass parts an acidic catalysts, stir, 10h is reacted at the temperature of 60 DEG C, stop stirring, filter, be warming up to 150 DEG C, de-low molecule 6h, obtains described containing hydrogen silicone oil after cooling.Wherein, an acidic catalyst is atlapulgite.
The preparation method of single-component add-on type liquid silicon rubber is as follows:
(1) prepare base glue: 400Kg vinyl silicone oil is added stirring at room temperature 1h in kneader, the MQ silicone resin adding 60Kg stirs 1h, then adds 60KgMQ silicone resin, continues to stir 3h, obtains base glue;
(2) 200Kg base glue, 5Kg containing hydrogen silicone oil, 0.05Kg inhibitor, add in stirring tank, mix;
(3) add 0.1Kg platinum catalyst in the mixture obtained to step (2), mix;
(4) product will prepared, vulcanizing press carries out molded vulcanization, and curing temperature is 120 DEG C, and curing time is 5min, obtains described silicon rubber.
It is as shown in table 1 that the parameter obtained tested by the silicon rubber prepared:
Table 1
| Test event | Performance |
| Outward appearance | Clear viscous liquids |
| Hardness (shore) | 45 |
| Tensile strength (MPa) | 8.0 |
| Tearing strength (KN/m) | 25 |
| Elongation at break (%) | 550 |
| Elasticity | 66 |
| Compressive set (%) | 11.5 |
Embodiment 2
The vinyl silicone oil that the present embodiment relates to is that at 25 DEG C, viscosity is 500mPa.s, and vinyl mass content is the polysiloxane of the ethenyl blocking of 1.6%; MQ silicone resin is that at 25 DEG C, viscosity is 500mPa.s, and vinyl mass content is the MQ silicone resin containing vinyl of 2.0%; The platinum mass content of platinum catalyst is 3000ppm; Containing hydrogen silicone oil is that at 25 DEG C, viscosity is 60mPa.s, and hydrogen mass content is the hydrogen containing siloxane of 1.5%; Inhibitor is 1 ~ 1 composite modifiedly under Platinic chloride effect to form in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin.
Vinyl silicone oil preparation method is as follows: by 100 mass parts octamethylcyclotetrasiloxanes and the mixing of 0.1 mass parts tetramethyl divinyl disiloxane, 0.01 mass parts of catalyst Tetramethylammonium hydroxide is added under the state stirred, be warming up to 100 DEG C of polymerization 4h, be warming up to 150 DEG C again, de-low molecule 10h, obtains described vinyl silicone oil after cooling.
Preparation method is as follows for MQ silicone resin: at 60 DEG C, is hydrolyzed in acid condition by 100 mass parts water glass, then adds 20 mass parts tetramethyl divinyl disiloxanes, 10 mass parts hexamethyldisiloxane cohydrolysis 2h, and backflow 4h synthesizes MQ extraction solution; After adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 6h under 150 DEG C of backflows; The MQ resin solution obtained is washed to neutrality, dry filter, and underpressure distillation obtains described MQ resin.
Containing hydrogen silicone oil preparation method is as follows: be that the high containing hydrogen silicone oil of 1.6% and the octamethylcyclotetrasiloxane of 150 mass parts are added in reactor by 100 mass parts hydrogen mass content, add 30 mass parts an acidic catalysts, stir, 8h is reacted at the temperature of 40 DEG C, stop stirring, filter, be warming up to 200 DEG C, de-low molecule 2h, obtains described containing hydrogen silicone oil after cooling.Wherein, an acidic catalyst is atlapulgite.
The preparation method of single-component add-on type liquid silicon rubber is as follows:
(1) prepare base glue: 400Kg vinyl silicone oil is added stirring at room temperature 1h in kneader, the MQ silicone resin adding 20Kg stirs 1h, then adds 60KgMQ silicone resin, continues to stir 3h, obtains base glue;
(2) 200Kg base glue, 2Kg containing hydrogen silicone oil, 0.2Kg inhibitor, add in stirring tank, mix;
(3) add 0.05Kg platinum catalyst in the mixture obtained to step (2), mix;
(4) product will prepared, vulcanizing press carries out molded vulcanization, and curing temperature is 120 DEG C, and curing time is 5min, obtains described silicon rubber.
It is as shown in table 2 that the parameter obtained tested by the silicon rubber prepared:
Table 2
| Test event | Performance |
| Outward appearance | Clear viscous liquids |
| Hardness (shore) | 50 |
| Tensile strength (MPa) | 8.2 |
| Tearing strength (KN/m) | 27 |
| Elongation at break (%) | 570 |
| Elasticity | 71 |
| Compressive set (%) | 12.0 |
Embodiment 3
The vinyl silicone oil that the present embodiment relates to is that at 25 DEG C, viscosity is 800mPa.s, and vinyl mass content is the polysiloxane of the ethenyl blocking of 0.8%; MQ silicone resin is that at 25 DEG C, viscosity is 300mPa.s, and vinyl mass content is the MQ silicone resin containing vinyl of 3.0%; The platinum mass content of platinum catalyst is 500ppm; Containing hydrogen silicone oil is that at 25 DEG C, viscosity is 200mPa.s, and hydrogen mass content is the hydrogen containing siloxane of 0.1%; Inhibitor is 1 ~ 1.5 composite modifiedly under Platinic chloride effect to form in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin.
Vinyl silicone oil preparation method is as follows: by 100 mass parts octamethylcyclotetrasiloxanes and the mixing of 1.5 mass parts tetramethyl divinyl disiloxanes, 0.5 mass parts of catalyst Tetramethylammonium hydroxide is added under the state stirred, be warming up to 80 DEG C of polymerization 6h, be warming up to 200 DEG C again, de-low molecule 6h, obtains described vinyl silicone oil after cooling.
Preparation method is as follows for MQ silicone resin: at 20 DEG C, is hydrolyzed in acid condition by 100 mass parts water glass, then adds 8 mass parts tetramethyl divinyl disiloxanes, 20 mass parts hexamethyldisiloxane cohydrolysis 0.5h, and backflow 2h synthesizes MQ extraction solution; After adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 4h under 80 DEG C of backflows; The MQ resin solution obtained is washed to neutrality, dry filter, and underpressure distillation obtains described MQ resin.
Containing hydrogen silicone oil preparation method is as follows: be that the high containing hydrogen silicone oil of 1.6% and the octamethylcyclotetrasiloxane of 100 mass parts are added in reactor by 100 mass parts hydrogen mass content, add 20 mass parts an acidic catalysts, stir, 2h is reacted at the temperature of 80 DEG C, stop stirring, filter, be warming up to 180 DEG C, de-low molecule 4h, obtains described containing hydrogen silicone oil after cooling.Wherein, an acidic catalyst is Zeo-karb.
The preparation method of single-component add-on type liquid silicon rubber is as follows:
(1) prepare base glue: 400Kg vinyl silicone oil is added stirring at room temperature 0.5h in kneader, the MQ silicone resin adding 60Kg stirs 0.5h, then adds 100KgMQ silicone resin, continues to stir 5h, obtains base glue;
(2) 200Kg base glue, 10Kg containing hydrogen silicone oil, 0.04Kg inhibitor, add in stirring tank, mix;
(3) add 0.02Kg platinum catalyst in the mixture obtained to step (2), mix;
(4) product will prepared, vulcanizing press carries out molded vulcanization, and curing temperature is 100 DEG C, and curing time is 10min, obtains described silicon rubber.
It is as shown in table 3 that the parameter obtained tested by the silicon rubber prepared:
Table 3
| Test event | Performance |
| Outward appearance | Clear viscous liquids |
| Hardness (shore) | 42 |
| Tensile strength (MPa) | 7.8 |
| Tearing strength (KN/m) | 22 |
| Elongation at break (%) | 535 |
| Elasticity | 68 |
| Compressive set (%) | 11.0 |
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a single-component add-on type liquid silicon rubber, is characterized in that: according to the mass fraction, and its raw material is composed of the following components:
Wherein, described base glue is made up of according to mass ratio 100:20 ~ 40 vinyl silicone oil and MQ silicone resin;
Described vinyl silicone oil is that viscosity is 500 ~ 1000mPa.s, vinyl mass content is the polysiloxane of the ethenyl blocking of 0.8 ~ 1.6% at 25 DEG C, and composition general formula is: R
2siO (SiRR ' O)
nsiR
2, wherein R is vinyl, and R ' is vinyl or methyl; Described MQ silicone resin be at 25 DEG C viscosity be 200 ~ 500mPa.s, vinyl mass content be 2.0 ~ 3.0% containing the MQ silicone resin of vinyl;
Described containing hydrogen silicone oil is that viscosity is 60 ~ 300mPa.s at 25 DEG C, and hydrogen mass content is the hydrogen containing siloxane of 0.1 ~ 1.5%.
2. single-component add-on type liquid silicon rubber according to claim 1, it is characterized in that: described vinyl silicone oil is prepared by following method: by octamethylcyclotetrasiloxane and tetramethyl divinyl disiloxane mixing, catalyzer Tetramethylammonium hydroxide is added under the state stirred, be warming up to 80 ~ 120 DEG C of polymerization 2 ~ 6h, be warming up to 150 ~ 200 DEG C again, de-low molecule 6 ~ 10h, obtains described vinyl silicone oil after cooling;
Wherein, the mass ratio of octamethylcyclotetrasiloxane, tetramethyl divinyl disiloxane, catalyzer Tetramethylammonium hydroxide is 100:0.1 ~ 3:0.01 ~ 0.5.
3. single-component add-on type liquid silicon rubber according to claim 1, is characterized in that: described MQ silicone resin is prepared by following method:
(1) at 20 ~ 60 DEG C, be hydrolyzed in acid condition by water glass, then add tetramethyl divinyl disiloxane, hexamethyldisiloxane cohydrolysis 0.5 ~ 2h, backflow 2 ~ 6h synthesizes MQ extraction solution;
(2) after adding isopyknic toluene in MQ extraction solution, dehydrating polycondensation 2 ~ 6h under 80 ~ 150 DEG C of backflows;
(3) the MQ resin solution obtained is washed to neutrality, dry filter, underpressure distillation obtains described MQ resin;
Wherein, the mass ratio of water glass, tetramethyl divinyl disiloxane, hexamethyldisiloxane is 100:8 ~ 20:5 ~ 20.
4. single-component add-on type liquid silicon rubber according to claim 1, it is characterized in that: described containing hydrogen silicone oil is prepared by following methods: by hydrogen mass content be 1.5 ~ 1.6% high containing hydrogen silicone oil and octamethylcyclotetrasiloxane be added in reactor, add an acidic catalyst, stir, at the temperature of 40 ~ 80 DEG C, react 2 ~ 10h, stop stirring, filter, be warming up to 150 ~ 200 DEG C, de-low molecule 2 ~ 6h, obtains described containing hydrogen silicone oil after cooling;
Wherein, hydrogen mass content be 1.5 ~ 1.6% high containing hydrogen silicone oil, octamethylcyclotetrasiloxane, an acidic catalyst mass ratio be 100:50 ~ 150:15 ~ 30.
5. single-component add-on type liquid silicon rubber according to claim 4, is characterized in that: described an acidic catalyst is atlapulgite or Zeo-karb.
6. single-component add-on type liquid silicon rubber according to claim 1, is characterized in that: described platinum catalyst is synthesized by Platinic chloride and Virahol coordination, and platinum mass content is 500 ~ 3000ppm.
7. single-component add-on type liquid silicon rubber according to claim 1, is characterized in that: described inhibitor is, and to be that 1 ~ 2:1 is composite modified under Platinic chloride effect in molar ratio by heptamethylcyclotetrasiloxane and ethynyl-1-hexalin form.
8. a preparation method for the arbitrary described single-component add-on type liquid silicon rubber of claim 1 ~ 7, is characterized in that: comprise the following steps:
(1) prepare base glue: 100 mass parts vinyl silicone oils are added stirring at room temperature 0.5 ~ 1h in kneader, the MQ silicone resin adding formula ratio 25% ~ 50% stirs 0.5 ~ 1h, then adds residue MQ silicone resin, continues stirring 3 ~ 5h, obtains base glue;
(2) 100 mass parts base glue, 0.01 ~ 0.05 mass parts platinum catalyst and 1 ~ 5 mass parts containing hydrogen silicone oil, 0.02 ~ 0.1 mass parts inhibitor are added in stirring tank, mix;
(3) liquid silastic prepared in step (2) is carried out molded vulcanization on vulcanizing press, obtain described single component liquid silicon rubber.
9. the preparation method of single-component add-on type liquid silicon rubber as claimed in claim 8, it is characterized in that: in step (3), curing temperature is 100 ~ 140 DEG C, and curing time is 5 ~ 10min.
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| CN115779970A (en) * | 2021-11-18 | 2023-03-14 | 广州市矽友新材料科技有限公司 | Platinum catalyst for single-component addition type liquid silicone rubber and preparation method and application thereof |
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| CN115519868A (en) * | 2022-08-26 | 2022-12-27 | 广东君点科技有限公司 | Silicone oil permeation-preventing temperature-resistant pressure-resistant fluorosilicone rubber belt and preparation method thereof |
| CN115519868B (en) * | 2022-08-26 | 2024-05-28 | 广东君点科技有限公司 | Silicone oil permeation-resistant temperature-resistant pressure-resistant fluorosilicone rubber belt and preparation method thereof |
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Application publication date: 20160113 |