High-strength polyurethane waterproof coating that can adhere to self-adhesive asphalt sheets

Abstract

This invention relates to a polyurethane waterproof coating technology. It proposes a high-strength polyurethane waterproof coating capable of adhering self-adhesive asphalt sheets. The coating consists of two components: Component A, which contains 15-25 parts by weight of Polyether 3010, 30-50 parts by weight of Polyether 220, 20-40 parts by weight of isocyanate, and 10-20 parts by weight of Plasticizer A; and Component B, which contains 10-15 parts by weight of Polyether 403, 5-10 parts by weight of Polyether 220, 10-35 parts by weight of Plasticizer B, 3-5 parts by weight of organic solvent, 20-30 parts by weight of filler, 0.03-0.06 parts by weight of catalyst, 5-25 parts by weight of curing agent, 0.02-0.04 parts by weight of silane coupling agent, 0.05-0.15 parts by weight of acidity regulator, and 0.02-0.05 parts by weight of defoamer. This technical solution solves the problems of conventional polyurethane waterproof coatings, such as low tensile strength and elongation at break.

Description

[Technical Field]

[0001] The present invention relates to the technical field of polyurethane waterproof coatings, and more particularly to high-strength polyurethane waterproof coatings capable of adhering self-adhesive asphalt sheets. [Background technology]

[0002] Waterproofing sheets are mainly used for the exterior walls, roofs, tunnels, roads, and landfills of buildings. Waterproofing sheets are flexible building materials that prevent rainwater and groundwater from seeping in from the outside. Waterproofing sheets, which connect the construction base and the building without leaks, are the first barrier in the entire waterproofing work and play an important role in the overall construction. However, poor adhesion between the waterproofing sheet and the building base during construction can affect the effectiveness of the waterproofing sheet.

[0003] Polyurethane waterproofing paint is a reactive-curing polymer waterproofing paint that is highly adaptable to cracks and elastic deformation of the substrate. Polyurethane waterproofing paint is broadly divided into three types depending on the packaging: one-component, two-component, and multi-component. Two-component paints are popular in the paint consumer industry due to their advantages of easy application, fast drying, and excellent waterproofing, and are widely used in fields such as road construction and road maintenance.

[0004] When designing or repairing waterproofing work, poor adhesion between the waterproof sheet and the building base is often improved by combining the waterproof sheet with polyurethane waterproof paint, but there is a demand for polyurethane waterproof paint to be even stronger in order to allow for a wider range of use and a longer lifespan. Summary of the Invention

[0005] The present invention proposes a high-strength polyurethane waterproof coating that can adhere to self-adhesive asphalt sheets, and solves the problems of low tensile strength and breaking elongation of polyurethane waterproof coatings in related art.

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

[0007] A high-strength polyurethane waterproof coating that can adhere self-adhesive asphalt sheets, As raw materials, a component A containing, by weight, 15 to 25 parts of polyether 3010, 30 to 50 parts of polyether 220, 20 to 40 parts of isocyanate, and 10 to 20 parts of plasticizer a; The raw materials are composed of component B, which contains, by weight, 10 to 15 parts of polyether 403, 5 to 10 parts of polyether 220, 10 to 35 parts of plasticizer b, 3 to 5 parts of organic solvent, 20 to 30 parts of filler, 0.03 to 0.06 parts of catalyst, 5 to 25 parts of curing agent, 0.02 to 0.04 parts of silane coupling agent, 0.05 to 0.15 parts of acidity regulator, and 0.02 to 0.05 parts of antifoaming agent.

[0008] In a further technical solution, the organic solvent includes one of toluene, xylene, and butyl acetate.

[0009] In a further technical solution, the antifoaming agent is a silicone-based antifoaming agent.

[0010] In a further technical solution, the curing agent includes one of diethyltoluenediamine, dimethylthiotoluenediamine, and methylcyclohexanediamine.

[0011] In a further technical solution, the mass ratio of the component A to the component B is 1:1-3.

[0012] In a further technical solution, the isocyanate comprises an aliphatic isocyanate and an aromatic isocyanate.

[0013] In a further technical solution, the aliphatic isocyanate includes one of dicyclohexylmethane diisocyanate and hexamethylene diisocyanate.

[0014] In a further technical solution, the aromatic isocyanate includes one of toluene diisocyanate and diphenylmethane diisocyanate.

[0015] In a further technical solution, the mass ratio of the aliphatic isocyanate to the aromatic isocyanate is 1:1.

[0016] In a further technical solution, the plasticizer a and the plasticizer b are each independently one or more of dioctyl phthalate, diisononyl phthalate, and dibutyl phthalate.

[0017] In a further technical solution, the filler comprises one or more of ground calcium carbonate, barium sulfate, magnesium oxide, calcium oxide and mica powder.

[0018] In a further technical solution, the catalyst includes one of a zinc-based catalyst and a bismuth-based catalyst.

[0019] As a further technical solution, the method for producing the component A includes the steps of: A1. Mixing polyether 3010, polyether 220, and plasticizer a uniformly, then heating the mixture to a first temperature and dehydrating the mixture to obtain a mixture I; A2. Adjusting to a second temperature and adding an isocyanate to the mixture to carry out a first reaction to obtain a mixture II; A3. Adjusting to a third temperature and carrying out a second reaction to obtain a mixture III; A4. Adjusting to a fourth temperature and degassing to obtain component A.

[0020] In 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.

[0021] In a further technical solution, the time for the first reaction is 1 to 2 hours.

[0022] In a further technical solution, the time for the second reaction is 2 to 3 hours.

[0023] As a further technical solution, the method for producing the component B includes: B1. Mixing polyether 403, polyether 220, plasticizer b, antifoaming agent and silane coupling agent uniformly, then raising the temperature to a first temperature, adding filler and curing agent, and dehydrating to obtain mixture b1; B2. Adjusting to a second temperature, adding an organic solvent, a catalyst, and an acidity regulator to the mixture b1, and mixing them uniformly to obtain a mixture b2; B3. Adjusting to a third temperature and dehydrating to obtain component B.

[0024] In 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.

[0025] The mechanism and advantageous effects of the present invention are as follows: This invention is a two-component polyurethane waterproof paint, in which the waterproof paint is obtained by reacting a prepolymer obtained by reacting isocyanate with the hydroxyl groups of polyether 3010 and polyether 220 in component A, with polyether 403, polyether 220, a filler, a curing agent, and a catalyst. By limiting the types and reaction order of specific hard polyethers, soft polyethers, and highly active amino ethers, the polyurethane segments can be controlled, resulting in a waterproof paint with high tensile strength and elongation at break. DETAILED DESCRIPTION OF THE INVENTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely based on the embodiments of the present invention as follows. It is clear that the described embodiments are not all of the embodiments, but only a part of the embodiments of the present invention. All other embodiments that a person skilled in the art can obtain based on the embodiments of the present invention without any creative efforts fall within the scope of protection of the present invention.

[0027] In the following examples and comparative examples, the defoaming agent is a silicone defoaming agent with product number 67845 purchased from Langfang Haoyang Environmental Protection Technology Co., Ltd.

[0028] Example 1 This is a high-strength polyurethane waterproofing paint consisting of component A and component B in a 1:1 mass ratio, which can be used to adhere self-adhesive asphalt sheets.

[0029] The method for producing component A is as follows. A1. 15 parts of polyether 3010, 30 parts of polyether 220, and 10 parts of dioctyl phthalate were placed in a reactor, stirred uniformly at 1000 r / min, heated to 105°C, and vacuum dehydrated to obtain mixture I. A2. The temperature was adjusted to 60°C, and 10 parts of dicyclohexylmethane diisocyanate and 10 parts of toluene diisocyanate were added to the mixture at a rotation speed of 1500 r / min, and the mixture was reacted for 2 hours to obtain mixture II. A3. The temperature was adjusted to 75°C, and the reaction was continued for 3 hours at a rotation speed of 1500 r / min to obtain a mixture III. A4. The temperature was adjusted to 45°C, and the mixture was degassed under vacuum and extracted as component A.

[0030] The method for producing component B is as follows. B1. 10 parts of polyether 403, 5 parts of polyether 220, 10 parts of dioctyl phthalate b, 0.02 parts of antifoaming agent, and 0.02 parts of silane coupling agent KH550 were placed in a reactor, stirred uniformly at a rotation speed of 1000 r / min, and heated to 100°C. 20 parts of heavy calcium carbonate and 5 parts of diethyltoluenediamine were then added, and the mixture was dehydrated under vacuum to obtain mixture b1. B2. The temperature was adjusted to 50°C, and at a rotation speed of 2000 r / min, 3 parts of triene, 0.03 parts of zinc neodecanoate, and 0.05 parts of acidity regulator were added to mixture b1 and mixed uniformly to obtain mixture b2. B3. The temperature was adjusted to 40°C, and the mixture was dehydrated under vacuum and extracted as component B.

[0031] Example 2 This is a high-strength polyurethane waterproofing paint consisting of component A and component B in a 1:1 mass ratio, which can be used to adhere self-adhesive asphalt sheets.

[0032] The method for producing component A is as follows. A1. 20 parts of polyether 3010, 40 parts of polyether 220, and 15 parts of dibutyl phthalate were placed in a reactor, stirred uniformly at 1000 r / min, heated to 110°C, and vacuum dehydrated to obtain mixture I. A2. The temperature was adjusted to 65°C, and 15 parts of hexamethylene diisocyanate and 15 parts of toluene diisocyanate were added to the mixture at a rotation speed of 1500 r / min, and the mixture was reacted for 1.5 hours to obtain mixture II. A3. The temperature was adjusted to 80°C, and the reaction was continued for 2.5 hours at a rotation speed of 1500 r / min to obtain a mixture III. A4. The temperature was adjusted to 50°C, and the mixture was degassed under vacuum and extracted as component A.

[0033] The method for producing component B is as follows. B1. 13 parts of polyether 403, 8 parts of polyether 220, 20 parts of diisononyl phthalate, 0.03 parts of an antifoaming agent, and 0.03 parts of a silane coupling agent KH550 were placed in a reactor, stirred uniformly at a rotation speed of 1000 r / min, and heated to 110°C. 25 parts of barium sulfate and 15 parts of dimethylthiotoluenediamine were then added, and the mixture was dehydrated under vacuum to obtain mixture b1. B2. The temperature was adjusted to 55°C, and 4 parts of xylene, 0.04 parts of bismuth(III) octoate, and 0.10 parts of an acidity regulator were added to mixture b1 at a rotation speed of 2000 r / min, and mixed uniformly to obtain mixture b2. B3. The temperature was adjusted to 45°C, and the mixture was dehydrated under vacuum and extracted as component B.

[0034] Example 3 This is a high-strength polyurethane waterproofing paint consisting of component A and component B in a 1:1 mass ratio, which can be used to adhere self-adhesive asphalt sheets.

[0035] The method for producing component A is as follows. A 1.25 parts of polyether 3010, 50 parts of polyether 220, and 20 parts of dibutyl phthalate were placed in a reactor, stirred uniformly at a rotation speed of 1000 r / min, heated to 115°C, and dehydrated under vacuum to obtain mixture I. A2. The temperature was adjusted to 70°C, and 20 parts of hexamethylene diisocyanate and 20 parts of toluene diisocyanate were added to the mixture at a rotation speed of 1500 r / min, and the mixture was reacted for 1 hour to obtain mixture II. A3. The temperature was adjusted to 90°C, and the reaction was continued for 2 hours at a rotation speed of 1500 r / min to obtain mixture III. A4. The temperature was adjusted to 55°C, and the mixture was degassed under vacuum and extracted as component A.

[0036] The method for producing component B is as follows. B1. 15 parts of polyether 403, 10 parts of polyether 220, 35 parts of dioctyl phthalate, 0.05 parts of antifoaming agent, and 0.04 parts of silane coupling agent KH550 were placed in a reactor, stirred uniformly at a rotation speed of 1000 r / min, and heated to 120°C. 30 parts of calcium oxide and 25 parts of dimethylthiotoluenediamine were then added, and the mixture was dehydrated under vacuum to obtain mixture b1. B2. The temperature was adjusted to 60°C, and 5 parts of butyl acetate, 0.06 parts of zinc neodecanoate, and 0.15 parts of an acidity regulator were added to mixture b1 at a rotation speed of 2000 r / min, and mixed uniformly to obtain mixture b2. B3. The temperature was adjusted to 50°C, and the mixture was dehydrated under vacuum to obtain component B.

[0037] Example 4 Example 4 differed from Example 1 in that the mass ratio of component A to component B was 1:2.

[0038] Example 5 Example 5 differed from Example 1 in that the mass ratio of component A to component B was 1:3.

[0039] Example 6 Example 6 differed from Example 1 in that the mass ratio of component A to component B was 1:2.5.

[0040] Comparative Example 1 Comparative Example 1 was the same as Example 1, except that the polyether 3010 in the component A was replaced with the same amount of polyether 220.

[0041] Comparative Example 2 Comparative Example 2 was the same as Example 1, except that the polyether 220 in the component A was replaced with the same amount of polyether 3010.

[0042] Comparative Example 3 Comparative Example 3 was the same as Example 1 except that, unlike Example 1, polyether 403 was not added as the B component.

[0043] Comparative Example 4 Comparative Example 4 was the same as Example 1 except that, unlike Example 1, polyether 220 was not added as the B component.

[0044] Comparative Example 5 Comparative Example 5 was the same as Example 1 except that, unlike Example 1, polyether 403 and polyether 220 were not added as the B component.

[0045] Comparative Example 6 Comparative Example 6 was the same as Example 1, except that the polyether 403 in the component B was replaced with the same amount of polyether 480.

[0046] Test Example According to the measurement methods in GB / T19250-2013 "Polyurethane Waterproof Coating," the tensile strength and elongation at break of the coating materials in Examples 1 to 6 and Comparative Examples 1 to 6 were measured. The measurement results are shown in Table 1.

[0047] Table 1: Performance measurement results of paints in Examples 1 to 6 and Comparative Examples 1 to 6 [Table 1]

[0048] Compared with Example 1, in Comparative Example 1, polyether 3010 in component A was replaced with the same amount of polyether 220, and in Comparative Example 2, polyether 220 in component A was replaced with the same amount of polyether 3010. As a result, the polyurethane waterproof coating of Comparative Example 1 had a lower tensile strength than Example 1, and the polyurethane waterproof coating of Comparative Example 2 had a lower breaking elongation than Example 1. It was shown that when polyether 3010 and polyether 220 were added simultaneously as component A, the polyurethane waterproof coating had both high breaking elongation and tensile strength.

[0049] Compared to Example 1, in Comparative Example 3, polyether 403 was not added as component B; in Comparative Example 4, polyether 220 was not added as component B; in Comparative Example 5, polyether 403 and polyether 220 were not added as component B; and in Comparative Example 6, polyether 403 was replaced with an equal amount of polyether 480. As a result, the polyurethane waterproof coating of Comparative Example 3 had a lower tensile strength than Example 1; the polyurethane waterproof coating of Comparative Example 4 had a lower tensile strength than Example 1; the polyurethane waterproof coating of Comparative Example 5 had a lower tensile strength and elongation at break than Example 1; and the polyurethane waterproof coating of Comparative Example 6 had a lower tensile strength and elongation at break than Example 1. In the present invention, it has been shown that the polyurethane waterproof coating obtained by reacting component A with component B, to which polyether 403 and polyether 220 are simultaneously added, achieves both high tensile strength and high elongation at break.

[0050] The above is merely a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made in accordance with the spirit and principles of the present invention shall fall within the scope of protection of the present invention.

Claims

1. As raw materials, a component A containing, by weight, 15 to 25 parts of polyether 3010, 30 to 50 parts of polyether 220, 20 to 40 parts of isocyanate, and 10 to 20 parts of plasticizer a; A high-strength polyurethane waterproof coating capable of adhering a self-adhesive asphalt sheet, characterized in that it comprises as raw materials a component B containing, by weight, 10 to 15 parts of polyether 403, 5 to 10 parts of polyether 220, 10 to 35 parts of plasticizer b, 3 to 5 parts of an organic solvent, 20 to 30 parts of a filler, 0.03 to 0.06 parts of a catalyst, 5 to 25 parts of a curing agent, 0.02 to 0.04 parts of a silane coupling agent, 0.05 to 0.15 parts of an acidity regulator, and 0.02 to 0.05 parts of an antifoaming agent.

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

3. 2. The high-strength polyurethane waterproof coating material capable of adhering self-adhesive asphalt sheets according to claim 1, wherein the isocyanate comprises an aliphatic isocyanate and an aromatic isocyanate.

4. 2. The high-strength polyurethane waterproof coating capable of adhering to the self-adhesive asphalt sheet according to claim 1, wherein the plasticizer a and the plasticizer b are each independently one or more of dioctyl phthalate, diisononyl phthalate, and dibutyl phthalate.

5. 2. A high-strength polyurethane waterproof coating capable of adhering to self-adhesive asphalt sheets according to claim 1, characterized in that the filler comprises one or more of heavy calcium carbonate, barium sulfate, magnesium oxide, calcium oxide and mica powder.

6. 2. The high-strength polyurethane waterproof coating capable of adhering to self-adhesive asphalt sheets according to claim 1, wherein the catalyst comprises one of a zinc-based catalyst and a bismuth-based catalyst.

7. The method for producing the component A comprises: A1. Mixing polyether 3010, polyether 220, and plasticizer a uniformly, then heating the mixture to a first temperature and dehydrating the mixture to obtain a mixture I; A2. Adjusting to a second temperature and adding an isocyanate to the mixture to carry out a first reaction to obtain a mixture II; A3. Adjusting to a third temperature and carrying out a second reaction to obtain a mixture III; A4. The high-strength polyurethane waterproof coating material capable of adhering to the self-adhesive asphalt sheet according to claim 1, characterized in that it comprises a step of adjusting to a fourth temperature and degassing to obtain component A.

8. The high-strength polyurethane waterproof coating material capable of adhering to self-adhesive asphalt sheets according to claim 7, characterized in that the first temperature is 105 to 115°C, the second temperature is 60 to 70°C, the third temperature is 75 to 90°C, and the fourth temperature is 45 to 55°C.

9. The method for producing the component B comprises: B1. A step of uniformly mixing polyether 403, polyether 220, plasticizer b, antifoaming agent, and silane coupling agent, then raising the temperature to a first temperature, adding a filler and a curing agent, and dehydrating to obtain a mixture b1; B2. Adjusting to a second temperature, adding an organic solvent, a catalyst, and an acidity regulator to the mixture b1, and mixing them uniformly to obtain a mixture b2; B3. The high-strength polyurethane waterproof coating material capable of adhering to the self-adhesive asphalt sheet according to claim 1, characterized in that it comprises a step of adjusting to a third temperature and dehydrating to obtain component B.

10. The high-strength polyurethane waterproof coating material capable of adhering to self-adhesive asphalt sheets according to claim 9, characterized in that the first temperature is 100 to 120°C, the second temperature is 50 to 60°C, and the third temperature is 40 to 50°C.