阅读说明：本技术 一种中性环保板材专用结构胶 (Special structural adhesive for neutral environment-friendly boards ) 是由 张加科 沈惠林 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种中性环保板材专用结构胶,其组份包括主料中的α,ω-二羟基聚二甲基硅氧烷100份、填料40～60份、色料3～15份和二甲基硅油10～50份,所述α,ω-二羟基聚二甲基硅氧烷的动力粘度为5Pa·S～45Pa·S。通过选用无污染的配方材料：α,ω-二羟基聚二甲基硅氧烷作为胶基料,并配用二甲基硅油、填料、色料和各种辅助配料消泡剂、硅烷偶联剂、交联剂、耐热添加剂、催化剂、增塑剂和阻燃剂,使结构胶符合板材的使用,具有优异的效能。(The invention discloses a special structural adhesive for a neutral environment-friendly plate, which comprises 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 40-60 parts of filler, 3-15 parts of pigment and 10-50 parts of simethicone in a main material, wherein the dynamic viscosity of the alpha, omega-dihydroxy polydimethylsiloxane is 5 Pa.S-45 Pa.S. The method comprises the following steps of selecting pollution-free formula materials: the alpha, omega-dihydroxy polydimethylsiloxane is used as a glue base material, and is matched with dimethyl silicone oil, a filler, a pigment, various auxiliary ingredients such as a defoaming agent, a silane coupling agent, a cross-linking agent, a heat-resistant additive, a catalyst, a plasticizer and a flame retardant, so that the structural glue conforms to the use of plates and has excellent efficiency.)

1. The special structural adhesive for the neutral environment-friendly plate comprises main materials and is characterized in that the main materials comprise 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 10-50 parts of simethicone, 40-60 parts of filler and 3-15 parts of pigment, and the dynamic viscosity of the alpha, omega-dihydroxy polydimethylsiloxane is 5 Pa.S-45 Pa.S.

2. The special structural adhesive for the neutral environment-friendly plate as claimed in claim 1, further comprising auxiliary materials, and is characterized in that: the auxiliary materials comprise 10-15 parts of defoaming agent, 8-12 parts of silane coupling agent, 8-18 parts of cross-linking agent, 1-3 parts of heat-resistant additive, 0.5-1 part of catalyst, 30-60 parts of plasticizer and 20-30 parts of flame retardant.

3. The special structural adhesive for neutral environment-friendly boards as claimed in claim 1, wherein the structural adhesive comprises: the filler comprises any one or the combination of at least two of light calcium carbonate, heavy calcium carbonate or fumed silica, and the pigment comprises any one or the combination of at least two of titanium dioxide, carbon black or white carbon black.

4. The special structural adhesive for neutral environment-friendly boards as claimed in claim 2, wherein the structural adhesive comprises: the silane coupling agent comprises any one or a combination of at least two of vinyltriethoxysilane, vinyltrimethoxysilane or vinyltris (beta-methoxyethoxy) silane, the crosslinking agent comprises any one or a combination of at least two of methyltriacetoxysilane, an organotitanium complex or aziridine, the catalyst comprises any one or a combination of at least two of dibutyl tin dilaurate, NT CAT SI220 or NT CATE-14, and the plasticizer comprises any one or a combination of two of DOP or dibutyl phthalate.

5. The special structural adhesive for the neutral environment-friendly plates as claimed in claim 2, wherein the preparation method comprises the following steps:

1) adding alpha, omega-dihydroxy polydimethylsiloxane, filler, pigment and dimethyl silicone oil into a base material barrel in sequence, adding into a dispersion machine, stirring, and then putting into a three-roller machine for grinding;

2) adding the ground main material and the plasticizer into a reaction kettle keeping the temperature below 20 ℃, and adding alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) sequentially adding a silane coupling agent, a defoaming agent, a heat-resistant additive and a crosslinking agent every 5 minutes while stirring continuously;

4) stirring for 10 minutes, adding a catalyst, stirring for 15 minutes, adding a flame retardant, and finally adding alpha, omega-dihydroxy polydimethylsiloxane for full stirring;

5) and (3) sealing the charging opening, pumping air by using a vacuum pump while stirring, stirring for 50 minutes under the vacuum pressure, and then opening an air valve to pressurize and discharge.

6. The special structural adhesive for neutral environment-friendly boards as claimed in claim 5, wherein the structural adhesive comprises: the addition amount of the alpha, omega-dihydroxy polydimethylsiloxane in the step 1) is 30 parts, the addition amount of the alpha, omega-dihydroxy polydimethylsiloxane in the step 2) is 60 parts, and the addition amount of the alpha, omega-dihydroxy polydimethylsiloxane in the step 4) is 10 parts.

7. The special structural adhesive for neutral environment-friendly boards as claimed in claim 5, wherein the structural adhesive comprises: and 1) grinding by using the three-roller grinding machine for 5 times, wherein the rough grinding is carried out firstly, and then the fine grinding is carried out, and the stirring of the dispersing machine in the step 1) is controlled within 20-60 minutes.

8. The special structural adhesive for neutral environment-friendly boards as claimed in claim 5, wherein the structural adhesive comprises: and 4) fully stirring the alpha, omega-dihydroxy polydimethylsiloxane for 20-60 minutes after the alpha, omega-dihydroxy polydimethylsiloxane is added.

9. The special structural adhesive for neutral environment-friendly boards as claimed in claim 5, wherein the structural adhesive comprises: and 5) keeping the vacuum pressure below 0.4Kpa, and increasing the pressure during the pressure discharge to 2 Kpa-4 Kpa in the step 5).

10. The special structural adhesive for neutral environment-friendly boards as claimed in claim 9, wherein: and 5) standing for 60-90 minutes under the negative pressure of less than 0.4Kpa before pressurizing and discharging.

Technical Field

The invention belongs to the technical field of adhesives. In particular to a special structural adhesive for neutral environment-friendly boards.

Background

The silicone adhesives on the market are various, and include acidic silicone adhesive, neutral glass adhesive, neutral silicone adhesive, mildew-proof silicone adhesive, weather-resistant silicone adhesive and the like. The acid glass cement can release irritant gas in the curing process, and has irritant effects on eyes and respiratory tracts of people. Alcohol-type neutral gums release methanol during curing. Methanol has a potential carcinogenic risk and is a known skin and respiratory allergy, and volatile gases can irritate the eyes, nose and throat. The gel on the market can be completely cured after 2 to 24 hours. The product aims at building construction, the curing time is long, no problem exists, and air pollution in a short-term construction process can be accepted. But the exhibitions industry adhesive problem is a serious drawback. In addition, the silicone adhesive purchased in the market has overlarge viscosity and is used for bonding the plate and the plate, the bonding is not tight enough, the bonding degree is poor, and the colloid does not have a fireproof function.

Especially, under the condition that corrugated boards are used in exhibitions, because the bearing force of the corrugated boards is poor, part of the corrugated boards are exposed after being carved to influence the attractiveness, an adhesive is required to be used, the stress surface of the board surface is increased, the bearing strength is improved, and the adhesive matched with corresponding color paste is used for corrugated edge sealing to increase the attractiveness.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a special structural adhesive for a neutral environment-friendly plate, which is prepared by selecting 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 40-60 parts of filler, 3-15 parts of pigment and 10-50 parts of simethicone, wherein the dynamic viscosity of the alpha, omega-dihydroxy polydimethylsiloxane is 5 Pa.S-45 Pa.S. The method comprises the following steps of selecting pollution-free formula materials: alpha, omega-dihydroxy polydimethylsiloxane is used as a glue base material, and is matched with dimethyl silicone oil, a filler, a pigment and auxiliary materials, and the auxiliary materials comprise: the structural adhesive is in accordance with the use of the plate and has excellent efficiency.

The preparation raw materials of the special structural adhesive for the neutral environment-friendly plate are measured according to the relative ratio of the mass, 100 parts of alpha, omega-dihydroxy polydimethylsiloxane, 40-60 parts of filler, 3-15 parts of pigment and 10-50 parts of simethicone are contained in a main material, and the dynamic viscosity of the alpha, omega-dihydroxy polydimethylsiloxane is 5 Pa.S-45 Pa.S.

In the present invention, the α, ω -dihydroxypolydimethylsiloxane has a dynamic viscosity of 5Pa · S to 45Pa · S, for example 5Pa · S, 9Pa · S, 13Pa · S, 20Pa · S, 23Pa · S, 25Pa · S, 29Pa · S, 32Pa · S, 38Pa · S, 42Pa · S, or 45Pa · S, and specific point values between the above point values are not exhaustive and are not limited to specific point values included in the range.

The filler is 40 to 60 parts, such as 40, 42, 44, 45, 47, 50, 51, 55, 57, or 60 parts, and the particular points between the above, are not intended to be exhaustive for purposes of limitation.

The colorant is 3-15 parts, such as 3, 4, 5, 6, 7, 9, 10, 12, 14, or 15 parts, and the particular points between the above points are not exhaustive for purposes of space and are not intended to be exhaustive.

10-50 parts, such as 10 parts, 15 parts, 19 parts, 24 parts, 28 parts, 30 parts, 35 parts, 38 parts, 47 parts, or 50 parts, of the dimethicone, and specific values therebetween, are not intended to be exhaustive of the specific values included in the range for space considerations.

Preferably, the filler comprises any one or a combination of at least two of light calcium carbonate, heavy calcium carbonate or fumed silica, and the pigment comprises any one or a combination of at least two of toning materials such as titanium dioxide, carbon black or white carbon black.

The auxiliary materials comprise 10-15 parts of defoaming agent, 8-12 parts of silane coupling agent, 8-18 parts of cross-linking agent, 1-3 parts of heat-resistant additive, 0.5-1 part of catalyst, 30-60 parts of plasticizer and 20-30 parts of flame retardant.

The defoamer is 10-15 parts, such as 10 parts, 10.5 parts, 11 parts, 11.5 parts, 12 parts, 12.5 parts, 13 parts, 13.5 parts, 14 parts, or 15 parts, and the specific points therebetween are not exhaustive for purposes of disclosure.

The silane coupling agent is present in 8 to 12 parts, such as 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, 10.2 parts, 11 parts, 11.5 parts, 11.7 parts, or 12 parts, and the specific points therebetween are not exhaustive for purposes of disclosure.

The crosslinker is present in 8 to 18 parts, such as 8, 8.5, 9, 9.5, 10, 13, 14.5, 16, 17, or 18 parts, and the ranges therebetween are not exhaustive for purposes of space.

The heat resistant additive is present in 1 to 3 parts, such as 1 part, 1.5 parts, 2 parts, 2.5 parts, or 3 parts, and the particular points between the foregoing, are not exhaustive of the particular points included in the ranges for space considerations.

The catalyst is present in an amount of 0.5 to 1 part, such as 0.5 part, 0.55 part, 0.6 part, 0.65 part, 0.7 part, 0.75 part, 0.8 part, 0.85 part, 0.9 part, or 1 part, and specific values therebetween, not to be considered an exhaustive list of specific values included in the range.

The plasticizer is 30 to 60 parts, such as 30 parts, 34 parts, 37 parts, 41 parts, 45 parts, 49 parts, 51 parts, 55 parts, 57 parts, or 60 parts, and the specific points therebetween are not exhaustive for the sake of space.

The flame retardant is 20 to 30 parts, such as 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, 26 parts, 27 parts, 29 parts, or 30 parts, and the specific points therebetween are not exhaustive for purposes of space.

Preferably, the silane coupling agent comprises any one or a combination of at least two of vinyltriethoxysilane, vinyltrimethoxysilane or vinyltris (β -methoxyethoxy) silane, the crosslinking agent comprises any one or a combination of at least two of methyltriacetoxysilane, an organotitanium complex or aziridine, the catalyst comprises any one or a combination of at least two of dibutyltin dilaurate, NT CAT SI220 or NT CATE-14, and the plasticizer comprises any one or a combination of two of DOP or dibutyl phthalate.

The preparation method comprises the following steps:

1) adding alpha, omega-dihydroxy polydimethylsiloxane, filler, pigment and dimethyl silicone oil into a base material barrel in sequence, adding into a dispersion machine, stirring, and then putting into a three-roller machine for grinding;

2) adding the ground main material and the plasticizer into a reaction kettle keeping the temperature below 20 ℃, and adding alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) sequentially adding a silane coupling agent, a defoaming agent, a heat-resistant additive and a crosslinking agent every 5 minutes while stirring continuously;

4) stirring for 10 minutes, adding a catalyst, stirring for 15 minutes, adding a flame retardant, and finally adding alpha, omega-dihydroxy polydimethylsiloxane for full stirring;

5) and sealing the charging hole, stirring while vacuumizing the vacuum pump, keeping stirring for 50 minutes under vacuum pressure, then closing a vacuum pump valve, opening a valve of an air compressor to increase air pressure, and extruding and discharging.

Preferably, the amount of the α, ω -dihydroxypolydimethylsiloxane added in step 1) is 30 parts, the amount of the α, ω -dihydroxypolydimethylsiloxane added in step 2) is 60 parts, and the amount of the α, ω -dihydroxypolydimethylsiloxane added in step 4) is 10 parts.

Preferably, the three-roll grinding in step 1) is performed at least 2 times after coarse grinding, and the stirring of the disperser in step 1) is controlled within a range of 20 to 60 minutes, such as 20 minutes, 22 minutes, 25 minutes, 27 minutes, 35 minutes, 40 minutes, 45 minutes, 52 minutes, 57 minutes or 60 minutes, and the specific values therebetween are not exhaustive for reasons of space.

Preferably, the α, ω -dihydroxy polydimethylsiloxane of step 4) requires sufficient stirring for 20 to 60 minutes after addition, such as 20 minutes, 22 minutes, 25 minutes, 27 minutes, 35 minutes, 40 minutes, 45 minutes, 52 minutes, 57 minutes or 60 minutes, and the specific values therebetween are not exhaustive for reasons of space.

Preferably, step 5) maintains the vacuum pressure below 0.4Kpa, such as 0.1Kpa, 0.12Kpa, 0.2Kpa, 0.25Kpa, or 0.4Kpa, and specific points therebetween, not exhaustive list of the specific points included in the range for space considerations.

Preferably, the pressure of the pressurized discharge of step 5) is increased to 2 to 4Kpa, for example 2Kpa, 2.2Kpa, 3Kpa, 3.5Kpa or 4Kpa, and the specific values therebetween, are not exhaustive for reasons of space and are not included in the range.

Preferably, the pressurized material in step 5) is allowed to stand for 60 to 90 minutes under a negative pressure of 0.4Kpa, such as 60 minutes, 63 minutes, 67 minutes, 71 minutes, 75 minutes, 79 minutes, 83 minutes, 86 minutes, 89 minutes or 90 minutes, and the specific values therebetween are not exhaustive for the purpose of disclosure.

The invention has the advantages that:

the silicone sealant with the formula ratio can ensure the bonding strength, the fitting degree and the flame retardant property, has good tensile strength, elongation at break and heat resistance, and is nontoxic, odorless and corrosion-free after being cured. The neutral silicone sealant is cured in a single component mode, is convenient to use, has good extrudability and thixotropy within the temperature range of-4-40 ℃, and can be directly constructed by extruding with a glue gun. Due to the control of the dynamic viscosity of the alpha, omega-dihydroxy polydimethylsiloxane, the viscosity is reduced, and the plate fitting and installation are easier. The surface drying time of the neutral structure adhesive can be controlled within half an hour, and the curing time is short. It has no corrosiveness to metal, coated glass, concrete, marble, granite and other building materials, and has wide application. Excellent aging resistance, ultraviolet resistance, ozone resistance, temperature resistance and the like, and can keep good elasticity at minus 50 ℃ to 150 ℃ after being cured. Has excellent adhesive performance to most building materials and good compatibility with other neutral silicone adhesives.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments. In the following examples, light calcium carbonate is used as a filler, titanium dioxide is used as a pigment, vinyltris (beta-methoxyethoxy) silane is used as a silane coupling agent, methyltriacetoxysilane is used as a crosslinking agent, NT CAT SI220 (an environment-friendly metal composite catalyst produced by New chemical materials Co., Ltd.) is used as a catalyst, dibutyl phthalate is used as a plasticizer, Dow Corning DC51 siloxane emulsion is used as a heat-resistant additive, Dow Corning defoaming agent AFE-1410 is used as a defoaming agent, and Germany Wake is used as a flame retardant. It should be understood by those skilled in the art that the present embodiment is only for the understanding of the present invention and should not be construed as a specific limitation of the present invention.

Example 1

A special structural adhesive for neutral environment-friendly boards is prepared from the following raw materials: 100g of alpha, omega-dihydroxy polydimethylsiloxane with the dynamic viscosity of 5 Pa.S, 40g of light calcium carbonate, 3g of titanium dioxide, 10g of simethicone, 10g of defoaming agent, 8g of vinyl tri (beta-methoxyethoxy) silane, 8g of methyl triacetoxysilane, 1g of heat-resistant additive, NT CAT SI2200.5g, 30g of dibutyl phthalate and 20g of flame retardant;

the preparation steps are as follows:

1) adding 30g of alpha, omega-dihydroxy polydimethylsiloxane, 40g of light calcium carbonate, 3g of titanium dioxide and 10g of simethicone into a base material barrel in sequence, adding the mixture into a dispersion machine, stirring for 20 minutes, and then putting the mixture into a three-roller machine to grind for at least more than 2 times;

2) adding the ground main material and 45g of dibutyl phthalate into a reaction kettle keeping the temperature below 20 ℃, and adding 60g of alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) 10g of vinyl tri (beta-methoxyethoxy) silane, 12.5g of defoaming agent, 2g of heat-resistant additive and 8g of methyl triacetoxysilane are added in turn every 5 minutes while stirring is not stopped;

4) stirring for 10 minutes, adding NT CAT SI2200.5g, stirring for 15 minutes, adding 20g of flame retardant, and finally adding 10g of alpha, omega-dihydroxy polydimethylsiloxane, and fully stirring for 20 minutes;

5) sealing the charging port, stirring while evacuating the vacuum pump, keeping the vacuum pressure above 0.4Kpa, stirring for 50 min, standing for 60 min, opening the air valve, pressurizing to 2Kpa, and extruding to discharge.

Example 2

The preparation raw materials comprise: 100g of alpha, omega-dihydroxy polydimethylsiloxane with dynamic viscosity of 25 Pa.S, 50g of light calcium carbonate, 9g of titanium dioxide, 30g of simethicone, 12.5g of defoaming agent, 10g of vinyl tri (beta-methoxyethoxy) silane, 13g of methyl triacetoxysilane, 2g of heat-resistant additive, 2200.75g of NT CAT, 45g of dibutyl phthalate and 25g of flame retardant;

the preparation steps are as follows:

1) adding 30g of alpha, omega-dihydroxy polydimethylsiloxane, 50g of light calcium carbonate, 9g of titanium dioxide and 30g of simethicone into a base material barrel in sequence, adding the mixture into a dispersion machine, stirring for 40 minutes, and then putting the mixture into a three-roller machine to grind for at least more than 2 times;

2) adding the ground main material and 45g of dibutyl phthalate into a reaction kettle keeping the temperature below 20 ℃, and adding 60g of alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) 10g of vinyl tri (beta-methoxyethoxy) silane, 12.5g of defoaming agent, 2g of heat-resistant additive and 13g of methyl triacetoxysilane are added in turn every 5 minutes while stirring is not stopped;

4) stirring for 10 minutes, adding NT CAT SI2200.75g, stirring for 15 minutes, adding 25g of flame retardant, and finally adding 10g of alpha, omega-dihydroxy polydimethylsiloxane and fully stirring for 40 minutes;

5) sealing the charging port, stirring while evacuating the vacuum pump, keeping the vacuum pressure below 0.4Kpa, stirring for 50 min, standing for 75 min, opening the air valve, pressurizing to 3Kpa, and extruding to discharge.

Example 3

The preparation raw materials comprise: 100g of alpha, omega-dihydroxy polydimethylsiloxane with dynamic viscosity of 45 Pa.S, 60g of light calcium carbonate, 15g of titanium dioxide, 50g of simethicone, 15g of defoaming agent, 12g of vinyl tri (beta-methoxyethoxy) silane, 18g of methyl triacetoxysilane, heat-resistant additive DC 513 g, NT CAT 2201 g, 60g of dibutyl phthalate and 30g of flame retardant;

the preparation steps are as follows:

1) adding 30g of alpha, omega-dihydroxy polydimethylsiloxane, 60g of light calcium carbonate, 15g of titanium dioxide and 50g of simethicone into a base material barrel in sequence, adding the mixture into a dispersion machine, stirring for 60 minutes, and then putting the mixture into a three-roller machine to grind for at least more than 2 times;

2) adding the ground main material and 60g of dibutyl phthalate into a reaction kettle keeping the temperature below 20 ℃, and adding 60g of alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) while stirring continuously, adding 12g of vinyl tri (beta-methoxyethoxy) silane, 15g of defoaming agent, 3g of heat-resistant additive and 18g of methyl triacetoxysilane in turn every 5 minutes;

4) stirring for 10 minutes, adding NT CAT SI 2201 g, stirring for 15 minutes, adding 30g of flame retardant, and finally adding 10g of alpha, omega-dihydroxy polydimethylsiloxane, and fully stirring for 60 minutes;

5) sealing the charging port, stirring while evacuating the vacuum pump, keeping the vacuum pressure below 0.4Kpa, stirring for 50 min, standing for 90 min, opening the air valve, pressurizing to 4Kpa, and extruding to discharge.

Comparative example 1

The preparation raw materials comprise: 100g of alpha, omega-dihydroxy polydimethylsiloxane with dynamic viscosity of 60 Pa.S, 60g of light calcium carbonate, 15g of titanium dioxide, 50g of simethicone, 15g of defoaming agent, 12g of vinyl tri (beta-methoxyethoxy) silane, 18g of methyl triacetoxysilane, 3g of heat-resistant additive, NT CAT SI 2201 g, 60g of dibutyl phthalate and 30g of flame retardant;

the preparation steps are as follows:

1) adding 30g of alpha, omega-dihydroxy polydimethylsiloxane, 60g of light calcium carbonate, 15g of titanium dioxide and 50g of simethicone into a base material barrel in sequence, adding the mixture into a dispersion machine, stirring for 60 minutes, and then putting the mixture into a three-roller machine to grind for at least more than 2 times;

2) adding the ground main material and 60g of dibutyl phthalate into a reaction kettle keeping the temperature below 20 ℃, and adding 60g of alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) while stirring continuously, adding 12g of vinyl tri (beta-methoxyethoxy) silane, 15g of defoaming agent, 3g of heat-resistant additive and 18g of methyl triacetoxysilane in turn every 5 minutes;

4) stirring for 10 minutes, adding NT CAT SI 2201 g, stirring for 15 minutes, adding 30g of flame retardant, and finally adding 10g of alpha, omega-dihydroxy polydimethylsiloxane, and fully stirring for 60 minutes;

5) sealing the charging port, stirring while evacuating the vacuum pump, keeping the vacuum pressure below 0.4Kpa, stirring for 50 min, standing for 90 min, opening the air valve, pressurizing to 4Kpa, and extruding to discharge.

In comparative example 1, the kinematic viscosity of α, ω -dihydroxypolydimethylsiloxane was set to 60Pa · S, and under the same conditions and operation mode, the curing time of the structural adhesive in comparative example 1 was increased by 10 minutes without changing the other additive materials, and it was found that the kinematic viscosity of α, ω -dihydroxypolydimethylsiloxane increased, and then the mixing rate between the ingredients increased to some extent, and the evaporation of the amount of colloidal gas and the air bubbles and water mixed in during the colloid preparation process were reduced.

Comparative example 2

The preparation raw materials comprise: 100g of alpha, omega-dihydroxy polydimethylsiloxane with the dynamic viscosity of 1 Pa.S, 60g of light calcium carbonate, 15g of titanium dioxide, 50g of simethicone, 15g of defoaming agent, 12g of vinyl tri (beta-methoxyethoxy) silane, 18g of methyl triacetoxysilane, 3g of heat-resistant additive, NT CAT SI 2201 g, 60g of dibutyl phthalate and 30g of flame retardant;

the preparation steps are as follows:

1) adding 30g of alpha, omega-dihydroxy polydimethylsiloxane, 60g of light calcium carbonate, 15g of titanium dioxide and 50g of simethicone into a base material barrel in sequence, adding the mixture into a dispersion machine, stirring for 60 minutes, and then putting the mixture into a three-roller machine to grind for at least more than 2 times;

2) adding the ground main material and 60g of dibutyl phthalate into a reaction kettle keeping the temperature below 20 ℃, and adding 60g of alpha, omega-dihydroxy polydimethylsiloxane while stirring;

3) while stirring continuously, adding 12g of vinyl tri (beta-methoxyethoxy) silane, 15g of defoaming agent, 3g of heat-resistant additive and 18g of methyl triacetoxysilane in turn every 5 minutes;

4) stirring for 10 minutes, adding NT CAT SI 2201 g, stirring for 15 minutes, adding 30g of flame retardant, and finally adding 10g of alpha, omega-dihydroxy polydimethylsiloxane, and fully stirring for 60 minutes;

5) sealing the charging port, stirring while evacuating the vacuum pump, keeping the vacuum pressure below 0.4Kpa, stirring for 50 min, standing for 90 min, opening the air valve, pressurizing to 4Kpa, and extruding to discharge.

While the kinematic viscosity of α, ω -dihydroxypolydimethylsiloxane was set to 60Pa · S in comparative example 1, the remaining additive materials were unchanged and under the same conditions and operating mode, comparative example 2 did not form an effective cure over the test time, and it was seen that after the kinematic viscosity of α, ω -dihydroxypolydimethylsiloxane decreased, the main filler was not effectively coagulated due to too much fluidity between the components.

The invention is particularly suitable for the use of corrugated plates in the exhibition industry, the corrugated plates are faster to build compared with the traditional wood, the production efficiency is high, no noise exists, and the corrugated plates can be completely recycled for the second time after exhibition is finished. After the invention overcomes the defects of the corrugated board, the thickness of the board surface is increased, so that the stress is increased, and the adhesive is matched with the corresponding color paste for edge sealing of the corrugated board, thereby increasing the aesthetic degree.

Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.