Portable pressure-free three-component polyurethane foaming joint mixture as well as preparation method and application thereof

Abstract

The invention provides a portable pressure-free three-component polyurethane foaming joint mixture as well as a preparation method and application thereof. The portable pressure-free three-component polyurethane foaming joint mixture comprises a component A, a component B and a component C, the component A is prepared from the following components in parts by weight: 30 to 60 parts of polyether polyol; 10-30 parts of a plasticizer; 5-15 parts of a foam stabilizer; 2-8 parts of a foaming agent; 0-20 parts of an inorganic filler; 0-20 parts of a flame retardant; the component B is prepared from polyisocyanate; the component C comprises the following components in parts by weight: 1-4 parts of a first catalyst; 5-10 parts of a second catalyst; the foaming agent is water; the component A, the component B and the component C are respectively canned in three different cylinders of the integrated three-chamber cylinder. The polyurethane foaming joint mixture provided by the invention is convenient to carry and light in construction; and meanwhile, the materials are stably stored, and the shelf life is prolonged and can be up to 36 months generally.

Description

Technical Field

[0001] The invention belongs to the technical field of adhesives and relates to a portable pressure-free three-component polyurethane foaming sealant and a preparation method and application thereof. Background Art

[0002] The curing of one-component polyurethane foam sealant requires the absorption of moisture in the air to produce a curing reaction. Therefore, the curing time is relatively long and it is highly dependent on the temperature and humidity of the environment. The surface drying time is usually 6-10 minutes and the mechanical cutting time is 1-3 hours. Mixing the very active isocyanate component with polyether polyol, catalyst, foam stabilizer, and gas foaming agent in one can will cause many unstable factors, resulting in a short shelf life of the one-component polyurethane foam sealant, usually within 12 months. In addition, this type of product uses a flammable and explosive gas foaming agent, usually a mixture of dimethyl ether and propane-butane, which poses a safety hazard to the production and transportation links, while increasing production and transportation costs.

[0003] However, the two-component polyurethane foam sealant also has the disadvantage of not having a long enough shelf life.

[0004] Therefore, the present invention is expected to develop a polyurethane foam sealant, which not only has a long shelf life and good storage stability, but also has a short mechanical cutting time, and is safer and more convenient to produce and transport. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a portable pressure-free three-component polyurethane foam sealant and a preparation method and application thereof. The portable pressure-free three-component polyurethane foam sealant provided by the present invention is a new product that is different from the traditional "single-component polyurethane foam sealant" on the market. The active isocyanate component, catalyst component and other components are respectively canned in an integrated three-chamber plastic tube ABC tube, and the total volume of the three tubes can be designed to be 200-1000mL, which is easy to carry and easy to construct. At the same time, the material storage is stable and the shelf life is increased, which can usually reach 36 months. The product formula of the present invention does not contain flammable and explosive compressed gas foaming agents, and there is no expansion pressure on the packaging tank body, making production and transportation safer and more convenient. How to adjust the matching ratio so that the ABC components foam immediately when the glue is discharged, showing a higher adhesion, a certain foaming ratio, and a curing speed is the key to the present invention.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a portable pressure-free three-component polyurethane foam sealant, wherein the portable pressure-free three-component polyurethane foam sealant comprises component A, component B and component C;

[0008] The component A comprises the following components in parts by weight:

[0009]

[0010] The B component includes a polyisocyanate;

[0011] The C component comprises the following components in parts by weight:

[0012] 1-4 parts of the first catalyst;

[0013] 5-10 parts of the second catalyst;

[0014] Preferably, the blowing agent is water, and only water;

[0015] The A component, the B component and the C component are respectively packaged in three different cylinders of the integrated three-chamber cylinder.

[0016] The portable pressure-free three-component polyurethane foaming sealant provided by the present invention does not contain a gas foaming agent, and a pressure-resistant aerosol can or a tin aerosol can can be used. The present invention cans component A, component B and component C into three different barrels of an integrated three-chamber barrel respectively, and one end of the three barrels is pushed and injected at the same time. A mixing head is installed at the glue outlet end of the ABC barrel. When the glue is pushed and injected, the ABC components are mixed and injected by the mixing head at the same time, and foaming occurs immediately. The foam is dense and uniform, and has adhesiveness. It can be completely cured after a few minutes. The cured foam has a certain hardness and elasticity. The production and manufacturing process does not use flammable and explosive gas foaming agents, and production and transportation are safer; the foaming and curing stages are not easily affected by the environment, and the foaming volume and curing time are more stable; the ABC integrated three-chamber plastic barrel is portable and has a longer shelf life.

[0017] The invention limits the raw material selection and dosage of component A, component B and component C, so that the product has excellent performance and a density of 20-32kg / cm 3 The foaming ratio is 30-40 times, the surface drying time is 3-6 seconds, the mechanical cutting time can be as low as 8 minutes, the hardness is 500-730N, and the shelf life can reach 36 months; it is suitable for fixing, bonding, filling and thermal insulation of various doors and windows; waterproofing and thermal insulation of walls, roofs and enclosures; sealing, heat insulation, heat preservation, plugging and filling gaps of various pipes; bonding, filling and insulation of various indoor objects; cushioning and shockproofing of express packaging.

[0018] In the present invention, the amount of polyether polyol in component A can be 30 parts, 32 parts, 34 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts, 50 parts, 52 parts, 54 parts, 56 parts, 58 parts, 60 parts, etc., based on parts by weight.

[0019] In the present invention, the amount of plasticizer in component A can be 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, 22 parts, 24 parts, 26 parts, 28 parts, 30 parts, etc., based on parts by weight.

[0020] In the present invention, the amount of the foam stabilizer in component A can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 15 parts, etc., based on parts by weight.

[0021] In the present invention, the amount of the foaming agent in component A can be 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, etc., based on parts by weight.

[0022] In the present invention, the amount of inorganic filler in component A can be 0 part (i.e., not added), 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, etc., based on parts by weight.

[0023] In the present invention, the amount of flame retardant in component A can be 0 parts (i.e., not added), 1 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 12 parts, 14 parts, 16 parts, 18 parts, 20 parts, etc., based on weight parts.

[0024] In the present invention, the amount of the first catalyst in the C component can be 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, etc., based on parts by weight.

[0025] In the present invention, the amount of the second catalyst in component C can be 5 parts, 5.5 parts, 6 parts, 6.5 parts, 7 parts, 7.5 parts, 8 parts, 8.5 parts, 9 parts, 9.5 parts, 10 parts, etc., based on parts by weight.

[0026] Preferably, the polyether polyol includes a first polyether polyol and a second polyether polyol.

[0027] Preferably, the first polyether polyol has a number average molecular weight of 400-800, for example, 400, 450, 500, 550, 600, 650, 700, 750, 800, etc., a functionality of 2, and a hydroxyl value of 200-300 mgKOH / g, for example, 200 mgKOH / g, 210 mgKOH / g, 220 mgKOH / g, 230 mgKOH / g, 240 mgKOH / g, 250 mgKOH / g, 260 mgKOH / g, 270 mgKOH / g, 280 mgKOH / g, 290 mgKOH / g, 300 mgKOH / g, etc.

[0028] Preferably, the second polyether polyol has a number average molecular weight of 1000-2000, for example, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800, 1900, 2000, etc., a functionality of 3, and a hydroxyl value of 100-200 mgKOH / g, for example, 100 mgKOH / g, 110 mgKOH / g, 120 mgKOH / g, 130 mgKOH / g, 140 mgKOH / g, 150 mgKOH / g, 160 mgKOH / g, 170 mgKOH / g, 180 mgKOH / g, 190 mgKOH / g, 200 mgKOH / g, etc.

[0029] Preferably, the mass ratio of the first polyether polyol to the second polyether polyol is (0.5-2):1, for example, 0.5:1, 0.6:1, 0.7:1, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, etc.

[0030] Preferably, the plasticizer comprises tris(1-chloro-2-propyl) phosphate (TCPP) and / or chlorinated paraffin, wherein TCPP acts as a plasticizer and a flame retardant.

[0031] Preferably, the chlorinated paraffin is an environmentally friendly high-viscosity chlorinated paraffin, and its viscosity at 50° C. is 700-900 Pa·s, for example, 700 Pa·s, 750 Pa·s, 800 Pa·s, 850 Pa·s, 900 Pa·s, etc.

[0032] Preferably, the foam stabilizer comprises silicone oil.

[0033] Preferably, the inorganic filler includes light calcium carbonate, which plays the role of reinforcement and oil absorption.

[0034] Preferably, the flame retardant comprises a flame retardant polyether.

[0035] Preferably, the polyisocyanate comprises diphenylmethane diisocyanate (MDI).

[0036] Preferably, the first catalyst comprises bis(2,2-morpholinoethyl)ether (DMDEE).

[0037] Preferably, the second catalyst comprises polyurethane catalyst A-1, and the polyurethane catalyst A-1 is a mixed solution of bisdimethylaminoethyl ether and dipropylene glycol, consisting of 70 wt % of bisdimethylaminoethyl ether and 30 wt % of dipropylene glycol.

[0038] Preferably, the mass ratio of the first catalyst to the second catalyst is 1:(2-4), for example, 1:2, 1:2.2, 1:2.4, 1:2.6, 1:2.8, 1:3, 1:3.2, 1:3.4, 1:3.6, 1:3.8, 1:4, etc.

[0039] Preferably, the ratio of the sum of the weights of the components A and C to the weight of the component B is (0.8-1.2):1, for example, 0.8:1, 0.9:1, 1:1, 1.1:1, 1.2:1, etc.

[0040] Preferably, the one-piece three-chamber cartridge comprises an one-piece three-chamber plastic cartridge.

[0041] In a second aspect, the present invention provides a method for preparing the portable pressure-free three-component polyurethane foam sealant as described in the first aspect, the preparation method comprising the following steps:

[0042] (1) uniformly mixing a polyether polyol, a plasticizer, a foam stabilizer, a foaming agent, an optional inorganic filler, and an optional flame retardant to obtain the component A;

[0043] (2) mixing the first catalyst and the second catalyst to obtain the C component;

[0044] (3) The component A tank is loaded into the A tube of the integrated three-chamber tube, the component B tank is loaded into the B tube of the integrated three-chamber tube, and the component C tank is loaded into the C tube of the integrated three-chamber tube to obtain the portable pressure-free three-component polyurethane foam sealant.

[0045] In a third aspect, the present invention provides an application of the portable pressure-free three-component polyurethane foam sealant as described in the first aspect in bonding or thermal insulation and waterproofing of doors and windows, buildings, pipelines, and express packaging.

[0046] Compared with the prior art, the present invention has at least the following beneficial effects:

[0047] (1) The portable pressure-free three-component polyurethane foaming sealant provided by the present invention can respectively can the active isocyanate component, the catalyst component and other components in an integrated three-chamber plastic tube ABC tube, and the total volume of the three tubes can be designed to be 200-1000mL, which is easy to carry and easy to construct. At the same time, the material storage is stable and the shelf life is increased, which can usually reach 36 months. The product formula of the present invention does not contain flammable and explosive compressed gas foaming agents, and there is no expansion pressure on the packaging tank body, making production and transportation safer and more convenient.

[0048] (2) The present invention limits the selection and dosage of raw materials for component A, component B and component C, so that the product has excellent performance and a density of 20-32 kg / cm 3The foaming ratio is 30-40 times, the surface drying time is 3-6 seconds, the mechanical cutting time can be as low as 8 minutes, the hardness is 500-730N, and the shelf life can reach 36 months; it is suitable for fixing, bonding, filling and thermal insulation of various doors and windows; waterproofing and thermal insulation of walls, roofs, and enclosures; sealing, heat insulation, heat preservation, plugging, and filling gaps of various pipes; bonding, filling, and insulation of various indoor objects; express packaging buffering and shockproof use. Its superior physical properties, portability, safety, and easy construction characteristics will become one of the important development trends of the polyurethane foam sealant industry. DETAILED DESCRIPTION

[0049] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0050] Unless otherwise specified, the raw material information used in the examples and comparative examples of the present invention is as follows:

[0051] (1) Polyether polyol

[0052] The first polyether polyol: molecular weight is 400, functionality is 2, hydroxyl value is 280mgKOH / g, brand is Bluestar Dongda Polyether 204;

[0053] The second polyether polyol has a molecular weight of 1000, a functionality of 3, a hydroxyl value of 168 mgKOH / g, and a brand name of Bluestar Dongda Polyether 310;

[0054] (2) Plasticizer

[0055] Tris(1-chloro-2-propyl) phosphate (TCPP): a high-purity product from Jiangsu Yak Technology Co., Ltd.;

[0056] Chlorinated paraffin: paraffin with a viscosity of 800 Pa.s (50°C) from Huaderui Chemical Co., Ltd., Jiaozuo City, Henan Province;

[0057] (3) Foam stabilizer: open-pore silicone oil 88711 produced by Jiangsu Meside Chemical Co., Ltd.

[0058] (4) Foaming agent: water

[0059] (5) Inorganic filler: light calcium carbonate

[0060] (6) Flame retardant: flame retardant polyether 3714 imported from Italy, with a hydroxyl value of 190 mgKOH / g;

[0061] (7) Polyisocyanate: diphenylmethane diisocyanate (MDI);

[0062] (8) First Catalyst

[0063] Bis(2,2-morpholinoethyl)ether (DMDEE) was obtained from Meside (Jilin) ​​New Materials Co., Ltd.;

[0064] (9) Second catalyst: polyurethane catalyst A-1, which is a mixed solution of bis(dimethylaminoethyl) ether and dipropylene glycol, composed of 70 wt % of bis(dimethylaminoethyl) ether and 30 wt % of dipropylene glycol, and is obtained from Nanjing Meside New Materials Co., Ltd.

[0065] Example 1

[0066] In this embodiment, a portable pressure-free three-component polyurethane foam sealant is provided, and the portable pressure-free three-component polyurethane foam sealant includes component A, component B and component C. The specific selection and dosage (weight parts) of each component are shown in Table 1.

[0067] The preparation method comprises the following steps:

[0068] (1) according to the formula in Table 1, a polyether polyol, a plasticizer, a foam stabilizer, a foaming agent, an optional inorganic filler and an optional flame retardant are uniformly mixed to obtain the component A;

[0069] (2) mixing the first catalyst and the second catalyst to obtain the C component;

[0070] (3) The component A tank is loaded into the A tube of the one-piece three-chamber plastic tube, the component B tank is loaded into the B tube of the one-piece three-chamber plastic tube, the component C tank is loaded into the C tube of the one-piece three-chamber plastic tube, and the tail sealing plug of the ABC tube is sealed to obtain the portable pressure-free three-component polyurethane foaming sealant.

[0071] Examples 2-6, Comparative Examples 1-6

[0072] The difference between Examples 2-6 and Comparative Examples 1-6 and Example 1 is that the raw material formulas are different, as shown in Tables 1 and 2.

[0073] Table 1

[0074]

[0075] Table 2

[0076]

[0077] Comparative Example 7

[0078] The only difference between this comparative example and Example 1 is that component A and component C are both canned into cylinder A of an integrated three-chamber plastic cylinder (and component A and component C are evenly mixed before canning), and component B is canned into cylinder B of an integrated three-chamber plastic cylinder, that is, this comparative example provides a portable pressure-free two-component polyurethane foam sealant.

[0079] The polyurethane foam sealant provided in the embodiment and the comparative example was tested for performance, and the test method was as follows:

[0080] (1) Density: Take samples and cut the cured foam into small pieces of 10cm*10cm*2.5cm. Weigh three pieces and calculate the density by dividing the weight by the volume.

[0081] (2) Foaming ratio: After a tube of foam is fully beaten out and the foam is completely solidified, the foam volume is measured using the water displacement method. The foam volume is divided by the total volume of the material filled in the one-piece three-chamber plastic barrel to obtain the foaming ratio.

[0082] (3) Surface drying time: Liquid foam is distributed in strips on a horizontal surface. After a certain period of solidification, a small stick or tube is used to touch the foam surface. When the surface is no longer sticky, the surface drying time is reached.

[0083] (4) Cutting time: The liquid foam is beaten into a specified strip on a horizontal surface. After curing for a certain period of time, the foam strip is cut; when the cut surface is not sticky, the blade remains clean, there is no prepolymer residue, and the pores are not squeezed, the cutting time is reached.

[0084] (5) Hardness: Cut the solidified foam into foam blocks of 10 cm*10 cm*5 cm and perform a compression test using a universal testing machine. The force value when the foam is compressed by 30% is taken as the hardness value.

[0085] (6) Bond strength: All specimens were prepared by foaming between two wooden boards. One day later, two wooden boards were glued together as a tearing device. After the specimens were fully cured, they were stretched using a tensile testing machine, gradually increasing the stretching distance at a set speed until the specimen broke. The tensile strength (bonding strength) is the maximum force that the specimen can withstand. The actual cavity volume between the two wooden boards is 5cm*5cm*2cm.

[0086] (7) Shelf life: After the polyurethane foam sealant is placed for a period of time, its foaming volume is tested. When the foaming volume is 90% of the new glue, the placement time is the shelf life.

[0087] The performance test results are shown in Table 3.

[0088] Table 3

[0089]

[0090] As can be seen from Table 3, the three-component polyurethane foam sealant provided by the embodiment of the present invention has a shorter surface drying time (3-6 seconds), a shorter cutting time (8-13 minutes), and a longer shelf life (up to 36 months). Embodiments 1-4 are the preferred formulas of the present invention, and all indicators of the foam are very good. Embodiments 5 and 6 use only one polyether polyol. The foam of embodiment 5 is brittle after curing, and the foam of embodiment 6 shrinks after curing. Comparative Example 1 uses only the first catalyst, the foam foaming effect is poor, the foam does not foam, and the foam foaming multiple is affected. Comparative Example 2 uses only the second catalyst, the foam is slowly cured, and the foam is easy to shrink. In Comparative Example 3, less foaming agent water is added, the foam foaming amount is small, the foam post-maturation time is long, and even incomplete curing may occur. In Comparative Example 4, too much foam glue is added and the foam foams quickly. The foam is soft. In Comparative Example 5, the amount of the second catalyst added is too small, the foam foams slowly, and the foaming multiple is low. In comparative example 6, the amount of the second catalyst added is too much, the foam foams quickly, and the foam is easy to solidify in the nozzle, which affects the use. Comparative example 7 provides a two-component polyurethane foaming sealant with a short shelf life, so examples 1-4 are the optimal ratio combination of polyether catalyst and foaming agent.

[0091] The applicant declares that the present invention uses the above-mentioned embodiments to illustrate the portable pressure-free three-component polyurethane foaming sealant and its preparation method and application, but the present invention is not limited to the above-mentioned embodiments, that is, it does not mean that the present invention must rely on the above-mentioned embodiments to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of various raw materials of the product of the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A portable, pressure-free three-component polyurethane foam sealant, characterized in that: The portable pressure-free three-component polyurethane foaming sealant comprises component A, component B and component C; The component A comprises the following components in parts by weight: The B component includes a polyisocyanate; The C component comprises the following components in parts by weight: 1-4 parts of the first catalyst; 5-10 parts of the second catalyst; The foaming agent is water; The A component, the B component and the C component are respectively packaged in three different cylinders of the integrated three-chamber cylinder.

2. The portable pressure-free three-component polyurethane foam sealant according to claim 1, characterized in that: The polyether polyol comprises a first polyether polyol and a second polyether polyol; Preferably, the first polyether polyol has a number average molecular weight of 400-800, a functionality of 2, and a hydroxyl value of 200-300 mgKOH / g; Preferably, the second polyether polyol has a number average molecular weight of 1000-2000, a functionality of 3, and a hydroxyl value of 100-200 mgKOH / g; Preferably, the mass ratio of the first polyether polyol to the second polyether polyol is (0.5-2):

1.

3. The portable pressure-free three-component polyurethane foam sealant according to claim 1 or 2, characterized in that: The plasticizer includes tris(1-chloro-2-propyl) phosphate and / or chlorinated paraffin; Preferably, the chlorinated paraffin is environmentally friendly high-viscosity chlorinated paraffin.

4. The portable pressure-free three-component polyurethane foam sealant according to any one of claims 1 to 3, characterized in that: The foam stabilizer includes silicone oil.

5. The portable pressure-free three-component polyurethane foam sealant according to any one of claims 1 to 4, characterized in that: The inorganic filler includes light calcium carbonate; Preferably, the flame retardant comprises a flame retardant polyether.

6. The portable pressure-free three-component polyurethane foam sealant according to any one of claims 1 to 5, characterized in that: The polyisocyanate includes diphenylmethane diisocyanate.

7. The portable pressure-free three-component polyurethane foam sealant according to any one of claims 1 to 6, characterized in that: The first catalyst includes bis(2,2-morpholinoethyl) ether; Preferably, the second catalyst comprises a polyurethane catalyst A-1, wherein the polyurethane catalyst A-1 is a mixed solution of bis(dimethylaminoethyl)ether and dipropylene glycol, and is composed of 70 wt % of bis(dimethylaminoethyl)ether and 30 wt % of dipropylene glycol; Preferably, the mass ratio of the first catalyst to the second catalyst is 1:(2-4).

8. The portable pressure-free three-component polyurethane foam sealant according to any one of claims 1 to 7, characterized in that: The ratio of the sum of the weights of the A component and the C component to the weight of the B component is (0.8-1.2):1; Preferably, the one-piece three-chamber cartridge comprises an one-piece three-chamber plastic cartridge.

9. A method for preparing a portable pressure-free three-component polyurethane foaming sealant as claimed in any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: (1) mixing a polyether polyol, a plasticizer, a foam stabilizer, a foaming agent, an optional inorganic filler, and an optional flame retardant to obtain the component A; (2) mixing the first catalyst and the second catalyst to obtain the C component; (3) The component A tank is loaded into the A tube of the integrated three-chamber tube, the component B tank is loaded into the B tube of the integrated three-chamber tube, and the component C tank is loaded into the C tube of the integrated three-chamber tube to obtain the portable pressure-free three-component polyurethane foam sealant.

10. Use of the portable pressure-free three-component polyurethane foam sealant as described in any one of claims 1 to 8 in door and window, building, pipeline, express packaging bonding or thermal insulation and waterproofing.

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