阅读说明：本技术 一种阻燃硅酮密封胶及其制备方法 (Flame-retardant silicone sealant and preparation method thereof ) 是由 吴义川 于 2020-03-19 设计创作，主要内容包括：本发明公开了一种阻燃硅酮密封胶,包括以下重量份的原料：三甲氧基封端聚二甲基硅氧烷、增塑剂、填料、交联剂、偶联剂、阻燃剂、催化剂、有机羟基硅酮、有机甲基硅酮、碳酸钙、橡胶、十二烷基硫酸钠、单氟磷酸钠、双氧水、乙二醇、酚醛树脂、水玻璃、香料、端乙烯基硅油、高乙烯基硅油、催化剂、二甲基硅油、乙炔环己醇、硅氮烷、绢云母粉、丙烯酸树脂和硅烷偶联剂；一种阻燃硅酮密封胶的制备方法,包括以下步骤：S1、搅拌混合；S2、加入溶剂；S3、加入香料：将S2中形成的胶体物逐渐加入等量重量份的香料,进行搅拌混合,形成所述的一种阻燃硅酮密封胶。(The invention discloses a flame-retardant silicone sealant which comprises the following raw materials in parts by weight: trimethoxy end-capped polydimethylsiloxane, a plasticizer, a filler, a cross-linking agent, a coupling agent, a flame retardant, a catalyst, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, hydrogen peroxide, ethylene glycol, phenolic resin, water glass, a spice, vinyl-terminated silicone oil, high vinyl silicone oil, a catalyst, dimethyl silicone oil, ethyne cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent; the preparation method of the flame-retardant silicone sealant comprises the following steps: s1, stirring and mixing; s2, adding a solvent; s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.)

1. The flame-retardant silicone sealant is characterized by comprising the following raw materials in parts by weight: 40-55 parts of trimethoxy terminated polydimethylsiloxane, 15-25 parts of plasticizer, 30-50 parts of filler, 0.1-3 parts of cross-linking agent, 1-10 parts of coupling agent, 4-8 parts of flame retardant, 0.1-3 parts of catalyst, 10-20 parts of organic hydroxyl silicone, 10-30 parts of organic methyl silicone, 80-90 parts of calcium carbonate, 4-6 parts of rubber, 1-2 parts of sodium dodecyl sulfate, 0.5-2 parts of sodium monofluorophosphate, 0.5-2 parts of hydrogen peroxide, 0.5-2 parts of ethylene glycol, 1-4 parts of phenolic resin, 0.5-2 parts of water glass, 0.5-2 parts of spice, 0.5-2 parts of terminal vinyl silicone oil, 0.5-2 parts of high vinyl silicone oil, 0.5-2 parts of catalyst, 10-15 parts of dimethyl silicone oil, 10-15 parts of acetylene cyclohexanol, 10-20 parts of silazane, 10-30 parts of sericite powder, 10-20 parts of acrylic resin and 10-20 parts of silane coupling agent.

2. The flame-retardant silicone sealant according to claim 1, characterized by comprising the following raw materials in parts by weight: 40 parts of trimethoxy end-capped polydimethylsiloxane, 15 parts of plasticizer, 30 parts of filler, 0.1 part of cross-linking agent, 1 part of coupling agent, 4 parts of flame retardant, 0.1 part of catalyst, 10 parts of organic hydroxyl silicone, 10 parts of organic methyl silicone, 80 parts of calcium carbonate, 4 parts of rubber, 1 part of sodium dodecyl sulfate, 0.5 part of sodium monofluorophosphate, 0.5 part of hydrogen peroxide, 0.5 part of ethylene glycol, 1 part of phenolic resin, 0.5 part of water glass, 0.5 part of spice, 0.5 part of terminal vinyl silicone oil, 0.5 part of high vinyl silicone oil, 0.5 part of catalyst, 10 parts of dimethyl silicone oil, 10 parts of ethyne cyclohexanol, 10 parts of silazane, 10 parts of sericite powder, 10 parts of acrylic resin and 10 parts of silane coupling agent.

3. The flame-retardant silicone sealant according to claim 1, characterized by comprising the following raw materials in parts by weight: 50 parts of trimethoxy end-capped polydimethylsiloxane, 20 parts of plasticizer, 45 parts of filler, 1.5 parts of cross-linking agent, 8 parts of coupling agent, 6 parts of flame retardant, 1.5 parts of catalyst, 15 parts of organic hydroxyl silicone, 20 parts of organic methyl silicone, 85 parts of calcium carbonate, 5 parts of rubber, 1.5 parts of sodium dodecyl sulfate, 1 part of sodium monofluorophosphate, 1 part of hydrogen peroxide, 1 part of ethylene glycol, 1.5 parts of phenolic resin, 1 part of water glass, 1 part of perfume, 1 part of vinyl-terminated silicone oil, 1 part of high vinyl silicone oil, 1 part of catalyst, 13 parts of dimethyl silicone oil, 13 parts of acetylene cyclohexanol, 15 parts of silazane, 20 parts of sericite powder, 15 parts of acrylic resin and 15 parts of silane coupling agent.

4. The flame-retardant silicone sealant according to claim 1, characterized by comprising the following raw materials in parts by weight: 55 parts of trimethoxy terminated polydimethylsiloxane, 25 parts of plasticizer, 50 parts of filler, 3 parts of cross-linking agent, 10 parts of coupling agent, 8 parts of flame retardant, 3 parts of catalyst, 20 parts of organic hydroxyl silicone, 30 parts of organic methyl silicone, 90 parts of calcium carbonate, 6 parts of rubber, 2 parts of sodium dodecyl sulfate, 2 parts of sodium monofluorophosphate, 2 parts of hydrogen peroxide, 2 parts of ethylene glycol, 3 parts of olive oil, 4 parts of phenolic resin, 2 parts of water glass, 2 parts of perfume, 2 parts of vinyl-terminated silicone oil, 2 parts of high vinyl silicone oil, 2 parts of catalyst, 15 parts of dimethyl silicone oil, 15 parts of acetylene cyclohexanol, 20 parts of silazane, 30 parts of sericite powder, 20 parts of acrylic resin and 20 parts of silane coupling agent.

5. A method for preparing a flame retardant silicone sealant for use in preparing a flame retardant silicone sealant according to claims 1-4, comprising the steps of:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

6. The method of claim 5, wherein the stirring speed of the chemical stirrer in S1 is controlled to be 40-50 r/min.

7. The method of claim 5, wherein the stirring speed of the chemical stirrer in S2 is controlled to be 65 r/min-75 r/min.

8. The method of claim 5, wherein the stirring speed of the chemical stirrer in S3 is controlled to be 25 r/min-35 r/min.

Technical Field

The invention relates to the field of sealants, in particular to a flame-retardant silicone sealant and a preparation method thereof.

Background

The silicone sealant has the characteristics of excellent temperature resistance, weather resistance, ageing resistance, no cracking, shock resistance, moisture resistance and the like, and is widely applied to the fields of buildings, electronic appliances, automobiles, aerospace and aviation. The general low-elongation fireproof flame-retardant sealant cannot meet the requirement of the high displacement capacity of a concrete joint, has poor bonding performance with concrete, is easy to crack, loses the sealing effect and has overhigh maintenance cost. Along with the enhancement of the fire safety awareness of people, the requirement on the fire-proof level of the sealant is higher and higher. Although the common silicone sealant has certain flame retardant property, the flame retardant property of the common silicone sealant still can not meet the requirement of the industry.

Disclosure of Invention

The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.

The flame-retardant silicone sealant comprises the following raw materials in parts by weight: 40-55 parts of trimethoxy terminated polydimethylsiloxane, 15-25 parts of plasticizer, 30-50 parts of filler, 0.1-3 parts of cross-linking agent, 1-10 parts of coupling agent, 4-8 parts of flame retardant, 0.1-3 parts of catalyst, 10-20 parts of organic hydroxyl silicone, 10-30 parts of organic methyl silicone, 80-90 parts of calcium carbonate, 4-6 parts of rubber, 1-2 parts of sodium dodecyl sulfate, 0.5-2 parts of sodium monofluorophosphate, 0.5-2 parts of hydrogen peroxide, 0.5-2 parts of ethylene glycol, 1-4 parts of phenolic resin, 0.5-2 parts of water glass, 0.5-2 parts of spice, 0.5-2 parts of terminal vinyl silicone oil, 0.5-2 parts of high vinyl silicone oil, 0.5-2 parts of catalyst, 10-15 parts of dimethyl silicone oil, 10-15 parts of acetylene cyclohexanol, 10-20 parts of silazane, 10-30 parts of sericite powder, 10-20 parts of acrylic resin and 10-20 parts of silane coupling agent.

The preparation method of the flame-retardant silicone sealant is used for preparing the flame-retardant silicone sealant and comprises the following steps:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

As a further scheme of the invention: and in the S1, the stirring speed of the chemical stirrer is controlled to be 40 r/min-50 r/min.

As a further scheme of the invention: and in the S2, the stirring speed of the chemical stirrer is controlled to be 65 r/min-75 r/min.

As a further scheme of the invention: and in the S3, the stirring speed of the chemical stirrer is controlled to be 25 r/min-35 r/min.

Compared with the prior art, the invention has the beneficial effects that: the smoke generated during combustion can be absorbed in time, and the effects of isolating flame and smoke and preventing fire are achieved; in addition, the addition amount of the fire retardant exceeds that of the common fire retardant, and meanwhile, the fire-proof flame-retardant sealant is not influenced to have excellent adhesion with building materials such as concrete, stone and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

The flame-retardant silicone sealant comprises the following raw materials in parts by weight: 40-55 parts of trimethoxy terminated polydimethylsiloxane, 15-25 parts of plasticizer, 30-50 parts of filler, 0.1-3 parts of cross-linking agent, 1-10 parts of coupling agent, 4-8 parts of flame retardant, 0.1-3 parts of catalyst, 10-20 parts of organic hydroxyl silicone, 10-30 parts of organic methyl silicone, 80-90 parts of calcium carbonate, 4-6 parts of rubber, 1-2 parts of sodium dodecyl sulfate, 0.5-2 parts of sodium monofluorophosphate, 0.5-2 parts of hydrogen peroxide, 0.5-2 parts of ethylene glycol, 1-4 parts of phenolic resin, 0.5-2 parts of water glass, 0.5-2 parts of spice, 0.5-2 parts of terminal vinyl silicone oil, 0.5-2 parts of high vinyl silicone oil, 0.5-2 parts of catalyst, 10-15 parts of dimethyl silicone oil, 10-15 parts of acetylene cyclohexanol, 10-20 parts of silazane, 10-30 parts of sericite powder, 10-20 parts of acrylic resin and 10-20 parts of silane coupling agent.

The preparation method of the flame-retardant silicone sealant is used for preparing the flame-retardant silicone sealant and comprises the following steps:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

Example two

The flame-retardant silicone sealant comprises the following raw materials in parts by weight: 40 parts of trimethoxy end-capped polydimethylsiloxane, 15 parts of plasticizer, 30 parts of filler, 0.1 part of cross-linking agent, 1 part of coupling agent, 4 parts of flame retardant, 0.1 part of catalyst, 10 parts of organic hydroxyl silicone, 10 parts of organic methyl silicone, 80 parts of calcium carbonate, 4 parts of rubber, 1 part of sodium dodecyl sulfate, 0.5 part of sodium monofluorophosphate, 0.5 part of hydrogen peroxide, 0.5 part of ethylene glycol, 1 part of phenolic resin, 0.5 part of water glass, 0.5 part of spice, 0.5 part of terminal vinyl silicone oil, 0.5 part of high vinyl silicone oil, 0.5 part of catalyst, 10 parts of dimethyl silicone oil, 10 parts of ethyne cyclohexanol, 10 parts of silazane, 10 parts of sericite powder, 10 parts of acrylic resin and 10 parts of silane coupling agent.

The preparation method of the flame-retardant silicone sealant is used for preparing the flame-retardant silicone sealant and comprises the following steps:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

EXAMPLE III

The flame-retardant silicone sealant comprises the following raw materials in parts by weight: 50 parts of trimethoxy end-capped polydimethylsiloxane, 20 parts of plasticizer, 45 parts of filler, 1.5 parts of cross-linking agent, 8 parts of coupling agent, 6 parts of flame retardant, 1.5 parts of catalyst, 15 parts of organic hydroxyl silicone, 20 parts of organic methyl silicone, 85 parts of calcium carbonate, 5 parts of rubber, 1.5 parts of sodium dodecyl sulfate, 1 part of sodium monofluorophosphate, 1 part of hydrogen peroxide, 1 part of ethylene glycol, 1.5 parts of phenolic resin, 1 part of water glass, 1 part of perfume, 1 part of vinyl-terminated silicone oil, 1 part of high vinyl silicone oil, 1 part of catalyst, 13 parts of dimethyl silicone oil, 13 parts of acetylene cyclohexanol, 15 parts of silazane, 20 parts of sericite powder, 15 parts of acrylic resin and 15 parts of silane coupling agent.

The preparation method of the flame-retardant silicone sealant is used for preparing the flame-retardant silicone sealant and comprises the following steps:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

Example four

The flame-retardant silicone sealant comprises the following raw materials in parts by weight: 55 parts of trimethoxy terminated polydimethylsiloxane, 25 parts of plasticizer, 50 parts of filler, 3 parts of cross-linking agent, 10 parts of coupling agent, 8 parts of flame retardant, 3 parts of catalyst, 20 parts of organic hydroxyl silicone, 30 parts of organic methyl silicone, 90 parts of calcium carbonate, 6 parts of rubber, 2 parts of sodium dodecyl sulfate, 2 parts of sodium monofluorophosphate, 2 parts of hydrogen peroxide, 2 parts of ethylene glycol, 3 parts of olive oil, 4 parts of phenolic resin, 2 parts of water glass, 2 parts of perfume, 2 parts of vinyl-terminated silicone oil, 2 parts of high vinyl silicone oil, 2 parts of catalyst, 15 parts of dimethyl silicone oil, 15 parts of acetylene cyclohexanol, 20 parts of silazane, 30 parts of sericite powder, 20 parts of acrylic resin and 20 parts of silane coupling agent.

The preparation method of the flame-retardant silicone sealant is used for preparing the flame-retardant silicone sealant and comprises the following steps:

s1, stirring and mixing: respectively pouring trimethoxy end-capped polydimethylsiloxane, organic hydroxyl silicone, organic methyl silicone, calcium carbonate, rubber, sodium dodecyl sulfate, sodium monofluorophosphate, phenolic resin, water glass, acetylene cyclohexanol, silazane, sericite powder, acrylic resin and a silane coupling agent which are equal in weight part into a chemical stirrer, and stirring and mixing to form a mixture;

s2, adding a solvent: gradually adding the same amount of plasticizer, filler, cross-linking agent, coupling agent, flame retardant, catalyst, hydrogen peroxide, ethylene glycol, olive oil, terminal vinyl silicone oil, high vinyl silicone oil, catalyst and dimethyl silicone oil into the mixture formed in S1, and stirring and mixing to form a colloid substance;

s3, adding spice: gradually adding the same amount of perfume by weight into the colloid formed in the S2, and stirring and mixing to form the flame-retardant silicone sealant.

The trimethoxy terminated polydimethylsiloxane is synthesized by hydrolysis by using primary form dimethyl cyclosiloxane as a main raw material, takes a silicon-oxygen (Si-O) bond as a main chain, and is an organic-inorganic compound with a silicon atom directly connected with an organic group; the primary form dimethyl cyclosiloxane molecular structure is annular, mainly comprises hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6), hexamethylcyclotrisiloxane (D3), or octamethylcyclotetrasiloxane (D4), or decamethylcyclopentasiloxane (D5) and or dodecamethylcyclohexasiloxane (D6), and is colorless transparent or milky liquid with the content of more than 50 percent, is combustible, free of peculiar smell, insoluble in water and soluble in organic solvents such as benzene.

The rubber is a high-elasticity polymer material with reversible deformation, is rich in elasticity at room temperature, can generate large deformation under the action of small external force, and can recover the original shape after the external force is removed; the rubber is one of natural rubber or synthetic rubber, and the rubber of the invention adopts natural rubber; the natural rubber is produced from a latex in which a part of non-rubber components contained therein is left in the solid natural rubber. Natural rubber typically contains 92% to 95% rubber hydrocarbons, while non-rubber hydrocarbons comprise 5% to 8%.

The phenolic resin is also called bakelite, also called bakelite powder. The raw material is colorless or yellow brown transparent, and the raw material is usually sold in markets and is red, yellow, black, green, brown, blue and the like by adding a coloring agent, and the raw material is in a granular or powdery state; the corrosion inhibitor is resistant to weak acid and weak base, can be decomposed when meeting strong acid, and can be corroded when meeting strong base. Insoluble in water, and soluble in organic solvents such as acetone and alcohol. Phenol formaldehyde or its derivatives.

The high vinyl silicone oil mainly comprises vinyl-terminated polydimethylsiloxane (Vi-PDMS) and vinyl-terminated polymethylvinylsiloxane (Vi-PMVS), and can provide products with different viscosities and vinyl contents according to requirements; high vinyl silicone oils can be divided into: the terminal vinyl silicone oil and the high vinyl silicone oil are main raw materials of addition type liquid silicone rubber, organic silicone gel and the like; modifier/plastic additive/reinforcing material of the rubber compound, and the like.

The dimethyl silicone oil is also called methyl silicone oil and polydimethylsiloxane liquid; colorless transparent viscous liquid, tasteless, odorless and nontoxic; the molecular formula is CH3[ Si (cH3)2] nSi (CH3)3, and the average molecular weight is 5000-100000; the kinematic viscosity varies from 1.0 x 10 < -6 > to 100000 x 10 < -6 > square meters per second according to the difference of molecular weight; the long-term use temperature range is-50-180 ℃, and the long-term use can be carried out under the condition of air isolation or in inert gas at the temperature of 200 ℃; the viscosity coefficient is 0.31-0.61; the surface tension is 1.59-2.15 multiplied by 10 < -4 > N/cm; a dielectric constant (23 ℃, 100Hz) of 2.18 to 2.17; a volume resistivity (23 ℃) of 1.0 × 1014 to 1.0 × 1016 Ω cm 3; a dielectric loss tangent value (23 ℃, 100Hz) of 0.00002-0.00004; the breakdown voltage strength is 13.7-17.7 kV/mm.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.