A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material

Abstract

The invention relates to the technical field of polyurethane waterproof coatings, and proposes a high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled materials, which is composed of component A and component B, wherein the raw materials of component A include the following components by weight: 15-25 parts of polyether 3010, 30-50 parts of polyether 220, 20-40 parts of isocyanate, and 10-20 parts of a plasticizer; the raw materials of component B include the following components by weight: 10-15 parts of polyether 403, 5-10 parts of polyether 220, 10-35 parts of b plasticizer, 3-5 parts of organic solvent, 20-30 parts of filler, 0.03-0.06 parts of catalyst, 5-25 parts of curing agent, 0.02-0.04 parts of silane coupling agent, 0.05-0.15 parts of acidic regulator, and 0.02-0.05 parts of defoaming agent. Through the above technical scheme, the problems of low tensile strength and elongation at break of polyurethane waterproof coatings in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane waterproof coatings, and in particular to a high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled materials. Background Art

[0002] Waterproof membrane is mainly used in building walls, roofs, tunnels, roads, landfills and other places. It is a flexible building material product that can resist leakage of external rainwater and groundwater. As a leak-free connection between the engineering foundation and the building, it is the first barrier of the entire waterproofing and plays a vital role in the entire project. However, during the construction process, the adhesion between the waterproof membrane and the building base is poor, which affects the use effect of the waterproof membrane.

[0003] Polyurethane waterproof coating is a reaction-curing polymer waterproof coating with strong adaptability to the expansion and contraction deformation of the base cracks. Polyurethane waterproof coating is divided into three categories in terms of packaging: single-component, two-component and multi-component. Two-component coatings are favored by the coating consumption industry due to their advantages such as easy construction, rapid drying and good waterproof effect. They are widely used in highway construction, highway maintenance and other fields.

[0004] In the process of waterproof construction design or maintenance, waterproof membranes are often compounded with polyurethane waterproof coatings to improve the poor adhesion between the waterproof membranes and the building base. However, the strength of polyurethane waterproof coatings needs to be further enhanced to expand their scope of use and lifespan. Summary of the invention

[0005] The present invention provides a high-strength polyurethane waterproof coating that can bond to asphalt self-adhesive coiled materials, which solves the problems of low tensile strength and elongation at break of polyurethane waterproof coatings in the related art.

[0006] The technical solution of the present invention is as follows:

[0007] A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled materials, comprising component A and component B, wherein the raw materials of component A include the following components in parts by weight: 15-25 parts of polyether 3010, 30-50 parts of polyether 220, 20-40 parts of isocyanate, and 10-20 parts of a plasticizer;

[0008] The raw materials of component B include the following components in parts by weight: 10-15 parts of polyether 403, 5-10 parts of polyether 220, 10-35 parts of plasticizer B, 3-5 parts of organic solvent, 20-30 parts of filler, 0.03-0.06 parts of catalyst, 5-25 parts of curing agent, 0.02-0.04 parts of silane coupling agent, 0.05-0.15 parts of acidic regulator, and 0.02-0.05 parts of defoaming agent.

[0009] As a further technical solution, the organic solvent includes one of toluene, xylene, and butyl acetate.

[0010] As a further technical solution, the defoaming agent is a silicone defoaming agent.

[0011] As a further technical solution, the curing agent includes one of diethyltoluenediamine, dimethylthiotoluenediamine and methylcyclohexanediamine.

[0012] As a further technical solution, the mass ratio of component A to component B is 1:1-3.

[0013] As a further technical solution, the isocyanate consists of aliphatic isocyanate and aromatic isocyanate.

[0014] As a further technical solution, the aliphatic isocyanate includes one of dicyclohexylmethane diisocyanate and hexamethylene diisocyanate.

[0015] As a further technical solution, the aromatic isocyanate includes one of toluene diisocyanate and diphenylmethane diisocyanate.

[0016] As a further technical solution, the mass ratio of the aliphatic isocyanate to the aromatic isocyanate is 1:1.

[0017] As a further technical solution, the plasticizer a and the plasticizer b are independently one or more of dioctyl phthalate, diisononyl phthalate, and dibutyl phthalate.

[0018] As a further technical solution, the filler includes one or more of heavy calcium, barium sulfate, magnesium oxide, calcium oxide and mica powder.

[0019] As a further technical solution, the catalyst includes one of a zinc catalyst and a bismuth catalyst.

[0020] As a further technical solution, the preparation method of component A comprises the following steps:

[0021] A1, after uniformly mixing polyether 3010, polyether 220 and plasticizer a, heating to a first temperature, dehydrating, to obtain mixture I;

[0022] A2, adjusting the temperature to a second temperature, adding isocyanate to the mixture, and performing a first reaction to obtain a mixture II;

[0023] A3, adjusting the temperature to the third temperature, performing the second reaction, and obtaining a mixture III;

[0024] A4, adjust to the fourth temperature, degas, and obtain component A.

[0025] As a further technical solution, the first temperature is 105-115°C, the second temperature is 60-70°C, the third temperature is 75-90°C, and the fourth temperature is 45-55°C.

[0026] As a further technical solution, the time of the first reaction is 1-2h.

[0027] As a further technical solution, the time of the second reaction is 2-3h.

[0028] As a further technical solution, the preparation method of the B component comprises the following steps:

[0029] B1, after polyether 403, polyether 220, b plasticizer, defoamer and silane coupling agent are uniformly mixed, the mixture is heated to the first temperature, and then fillers and curing agents are added, and dehydration is performed to obtain a mixture b1;

[0030] B2, adjusting the temperature to the second temperature, adding the organic solvent, the catalyst and the acidity regulator to the mixture b1 and mixing them evenly to obtain a mixture b2;

[0031] B3, adjust to the third temperature, dehydrate, and obtain component B.

[0032] As a further technical solution, the first temperature is 100-120°C, the second temperature is 50-60°C, and the third temperature is 40-50°C.

[0033] The working principle and beneficial effects of the present invention are:

[0034] The present invention relates to a two-component polyurethane waterproof coating. In component A, isocyanate is reacted with hydroxyl groups in polyether 3010 and polyether 220 to obtain a prepolymer, and then the prepolymer is reacted with polyether 403, polyether 220, a filler, a curing agent and a catalyst to obtain a waterproof coating. By limiting the types and reaction sequence of specific stearyl polyether, soft polyether and high-activity amino ether, the polyurethane chain segment is controlled, so that the prepared waterproof coating has higher tensile strength and elongation at break. DETAILED DESCRIPTION

[0035] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In the following embodiments and comparative examples:

[0037] The defoamer was an organosilicon defoamer, model 67845, purchased from Langfang Haoyang Environmental Protection Technology Co., Ltd.

[0038] Example 1

[0039] A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material, comprising component A and component B in a mass ratio of 1:1;

[0040] The preparation method of component A is as follows:

[0041] A1. Add 15 parts of polyether 3010, 30 parts of polyether 220 and 10 parts of dioctyl phthalate into a reactor, stir evenly at a speed of 1000 r / min, heat to 105° C., and vacuum dehydrate to obtain a mixture I;

[0042] A2, adjusting the temperature to 60°C, adding 10 parts of dicyclohexylmethane diisocyanate and 10 parts of toluene diisocyanate to the mixture at a speed of 1500 r / min, and reacting for 2 hours to obtain a mixture II;

[0043] A3, adjusting the temperature to 75°C, continuing the reaction at a speed of 1500 r / min for 3 h to obtain a mixture III;

[0044] A4. Adjust the temperature to 45°C, perform vacuum degassing, and discharge the material to obtain component A.

[0045] The preparation method of component B is as follows:

[0046] B1, add 10 parts of polyether 403, 5 parts of polyether 220, 10 parts of dioctyl phthalate, 0.02 parts of defoamer and 0.02 parts of silane coupling agent KH550 into a reactor, stir evenly at a speed of 1000 r / min, heat to 100° C., add 20 parts of heavy calcium and 5 parts of diethyltoluenediamine, and dehydrate under vacuum to obtain a mixture b1;

[0047] B2, adjusting the temperature to 50° C., adding 3 parts of toluene, 0.03 parts of zinc neodecanoate and 0.05 parts of acidity regulator to the mixture b1 at a speed of 2000 r / min, and mixing evenly to obtain a mixture b2;

[0048] B3. Adjust the temperature to 40°C, perform vacuum dehydration, and discharge the material to obtain component B.

[0049] Example 2

[0050] A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material, comprising component A and component B in a mass ratio of 1:1;

[0051] The preparation method of component A is as follows:

[0052] A1. Add 20 parts of polyether 3010, 40 parts of polyether 220 and 15 parts of dibutyl phthalate into a reaction kettle, stir evenly at a speed of 1000 r / min, heat to 110° C., and vacuum dehydrate to obtain a mixture I;

[0053] A2, adjusting the temperature to 65°C, adding 15 parts of hexamethylene diisocyanate and 15 parts of toluene diisocyanate to the mixture at a speed of 1500 r / min, and reacting for 1.5 hours to obtain a mixture II;

[0054] A3, adjusting the temperature to 80°C, continuing the reaction at a speed of 1500 r / min for 2.5 h to obtain a mixture III;

[0055] A4. Adjust the temperature to 50°C, perform vacuum degassing, and discharge the material to obtain component A.

[0056] The preparation method of component B is as follows:

[0057] B1, add 13 parts of polyether 403, 8 parts of polyether 220, 20 parts of diisononyl phthalate, 0.03 parts of defoamer and 0.03 parts of silane coupling agent KH550 into a reactor, stir evenly at a speed of 1000 r / min, raise the temperature to 110° C., then add 25 parts of barium sulfate and 15 parts of dimethylthiotoluenediamine, and dehydrate under vacuum to obtain a mixture b1;

[0058] B2, adjusting the temperature to 55° C., adding 4 parts of xylene, 0.04 parts of bismuth isooctanoate and 0.10 parts of acidity regulator to the mixture b1 at a speed of 2000 r / min, and mixing evenly to obtain a mixture b2;

[0059] B3. Adjust the temperature to 45°C, vacuum dehydrate, and discharge to obtain component B.

[0060] Example 3

[0061] A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material, comprising component A and component B in a mass ratio of 1:1;

[0062] The preparation method of component A is as follows:

[0063] A1. Add 25 parts of polyether 3010, 50 parts of polyether 220 and 20 parts of dibutyl phthalate into a reaction kettle, stir evenly at a speed of 1000 r / min, heat to 115° C., and vacuum dehydrate to obtain a mixture I;

[0064] A2, adjusting the temperature to 70°C, adding 20 parts of hexamethylene diisocyanate and 20 parts of toluene diisocyanate to the mixture at a speed of 1500 r / min, and reacting for 1 hour to obtain a mixture II;

[0065] A3, adjusting the temperature to 90°C, continuing the reaction at a speed of 1500 r / min for 2 h to obtain a mixture III;

[0066] A4. Adjust the temperature to 55°C, perform vacuum degassing, and discharge the material to obtain component A.

[0067] The preparation method of component B is as follows:

[0068] B1, add 15 parts of polyether 403, 10 parts of polyether 220, 35 parts of dioctyl phthalate, 0.05 parts of defoamer and 0.04 parts of silane coupling agent KH550 into a reactor, stir evenly at a speed of 1000 r / min, raise the temperature to 120° C., add 30 parts of calcium oxide and 25 parts of dimethylthiotoluenediamine, and dehydrate under vacuum to obtain a mixture b1;

[0069] B2, adjusting the temperature to 60° C., adding 5 parts of butyl acetate, 0.06 parts of zinc neodecanoate and 0.15 parts of acidity regulator to the mixture b1 at a speed of 2000 r / min and mixing evenly to obtain a mixture b2;

[0070] B3. Adjust the temperature to 50°C, perform vacuum dehydration, and discharge the material to obtain component B.

[0071] Example 4

[0072] Compared with Example 1, the difference of Example 4 is that the mass ratio of component A to component B is 1:2.

[0073] Example 5

[0074] Compared with Example 1, the difference of Example 5 is that the mass ratio of component A to component B is 1:3.

[0075] Example 6

[0076] Compared with Example 1, the difference in Example 6 is that the mass ratio of component A to component B is 1:2.5.

[0077] Comparative Example 1

[0078] Compared with Example 1, in Comparative Example 1, the polyether 3010 in component A is replaced with an equal amount of polyether 220, and the rest is the same as Example 1.

[0079] Comparative Example 2

[0080] Compared with Example 1, in Comparative Example 2, the polyether 220 in component A is replaced with an equal amount of polyether 3010, and the rest is the same as Example 1.

[0081] Comparative Example 3

[0082] Compared with Example 1, polyether 403 is not added to component B of Comparative Example 3, and the rest is the same as Example 1.

[0083] Comparative Example 4

[0084] Compared with Example 1, polyether 220 is not added to component B of Comparative Example 4, and the other components are the same as those of Example 1.

[0085] Comparative Example 5

[0086] Compared with Example 1, in Comparative Example 5, component B does not contain polyether 403 and polyether 220, and the rest is the same as Example 1.

[0087] Comparative Example 6

[0088] Compared with Example 1, in Comparative Example 6, the polyether 403 in component B is replaced with an equal amount of polyether 480, and the rest is the same as Example 1.

[0089] Test example

[0090] The tensile strength and elongation at break of the coatings in Examples 1-6 and Comparative Examples 1-6 were measured according to the measurement method in GB / T19250-2013 "Polyurethane Waterproof Coatings". The measurement results are shown in Table 1.

[0091] Table 1 Performance test results of coatings in Examples 1-6 and Comparative Examples 1-6

[0092]

[0093] Compared with Example 1, Comparative Example 1 replaces the polyether 3010 in component A with an equal amount of polyether 220, and Comparative Example 2 replaces the polyether 220 in component A with an equal amount of polyether 3010. As a result, the tensile strength of the polyurethane waterproof coating in Comparative Example 1 is lower than that in Example 1, and the elongation at break of the polyurethane waterproof coating in Comparative Example 2 is lower than that in Example 1, indicating that when polyether 3010 and polyether 220 are added to component A at the same time, the elongation at break and tensile strength of the polyurethane waterproof coating are both higher.

[0094] Compared with Example 1, polyether 403 is not added to component B of Comparative Example 3, polyether 220 is not added to component B of Comparative Example 4, polyether 403 and polyether 220 are not added to component B of Comparative Example 5, and polyether 403 is replaced with an equal amount of polyether 480 in Comparative Example 6. As a result, the tensile strength of the polyurethane waterproof coating in Comparative Example 3 is lower than that in Example 1, the tensile strength of the polyurethane waterproof coating in Comparative Example 4 is lower than that in Example 1, the tensile strength and elongation at break of the polyurethane waterproof coating in Comparative Example 5 are both lower than those in Example 1, and the tensile strength and elongation at break of the polyurethane waterproof coating in Comparative Example 6 are both lower than those in Example 1, indicating that the polyurethane waterproof coating obtained by reacting component B to which polyether 403 and polyether 220 are simultaneously added with component A in the present invention has both high tensile strength and elongation at break.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material, characterized in that: It is composed of component A and component B, wherein the raw materials of component A include the following components by weight: 15-25 parts of polyether 3010, 30-50 parts of polyether 220, 20-40 parts of isocyanate, and 10-20 parts of a plasticizer; The raw materials of component B include the following components by weight: 10-15 parts of polyether 403, 5-10 parts of polyether 220, 10-35 parts of plasticizer B, 3-5 parts of organic solvent, 20-30 parts of filler, 0.03-0.06 parts of catalyst, 5-25 parts of curing agent, 0.02-0.04 parts of silane coupling agent, 0.05-0.15 parts of acidic regulator, and 0.02-0.05 parts of defoaming agent; The preparation method of the component A comprises the following steps: A1, after uniformly mixing polyether 3010, polyether 220 and plasticizer a, heating to a first temperature, dehydrating, to obtain mixture I; A2, adjusting the temperature to a second temperature, adding isocyanate to the mixture, and performing a first reaction to obtain a mixture II; A3, adjusting the temperature to the third temperature, performing the second reaction, and obtaining a mixture III; A4, adjust to the fourth temperature, degas, and obtain component A; The preparation method of the B component comprises the following steps: B1, after polyether 403, polyether 220, b plasticizer, defoamer and silane coupling agent are uniformly mixed, the mixture is heated to the first temperature, and then fillers and curing agents are added, and dehydration is performed to obtain a mixture b1; B2, adjusting the temperature to the second temperature, adding the organic solvent, the catalyst and the acidity regulator to the mixture b1 and mixing them evenly to obtain a mixture b2; B3, adjust to the third temperature, dehydrate, and obtain component B.

2. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: The mass ratio of the component A to the component B is 1:1-3.

3. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: The isocyanate consists of aliphatic isocyanate and aromatic isocyanate.

4. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: The plasticizer a and the plasticizer b are independently selected from one or more of dioctyl phthalate, diisononyl phthalate and dibutyl phthalate.

5. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: The filler includes one or more of heavy calcium, barium sulfate, magnesium oxide, calcium oxide and mica powder.

6. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: The catalyst includes one of a zinc catalyst and a bismuth catalyst.

7. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: In the preparation method of component A, the first temperature is 105-115°C, the second temperature is 60-70°C, the third temperature is 75-90°C, and the fourth temperature is 45-55°C.

8. The high-strength polyurethane waterproof coating capable of bonding asphalt self-adhesive coiled material according to claim 1, characterized in that: In the preparation method of the B component, the first temperature is 100-120°C, the second temperature is 50-60°C, and the third temperature is 40-50°C.

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