CN115806770A - Double-component waterproof coating, preparation method thereof and building waterproof structure - Google Patents
Double-component waterproof coating, preparation method thereof and building waterproof structure Download PDFInfo
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Abstract
The application provides a two-component waterproof coating, a preparation method thereof and a building waterproof structure. The two-component waterproof coating is formed by mixing and reacting a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1; the component A comprises: 40-50 parts by weight of hydroxyl-terminated polybutadiene; 20-30 parts of liquid rubber; 16-26 parts of tackifying resin; 4-14 parts of polyisocyanate; the component B is as follows: 59-69 parts by weight of hydroxyl-terminated polybutadiene; 13-23 parts of liquid rubber; 13 to 23 parts of tackifying resin. The application provides a two ingredient water proof coating belongs to reaction type bond coating, utilizes terminal hydroxyl polybutadiene to have very high activity's hydroxyl-OH to polyisocyanate is as the chain extension group, realizes permanent incomplete solidification state after this coating reaction, is applicable to the bonding polymer waterproofing membrane, can make its intermolecular formation compact bonding structure of polymer waterproofing membrane, has fine waterproof and prevents scurrying the water property.
Description
Technical Field
The application belongs to the technical field of waterproof coatings, and particularly relates to a double-component waterproof coating, a preparation method and a building waterproof structure.
Background
At present, the waterproof roll is mainly divided into two types, namely a high polymer modified asphalt waterproof roll and a high polymer waterproof roll, wherein the high polymer waterproof roll comprises a polyvinyl chloride (PVC) waterproof roll, a Thermoplastic Polyolefin (TPO) waterproof roll, a high polymer self-adhesive film pre-paved anti-adhesive waterproof roll, a Chlorinated Polyethylene (CPE) waterproof roll and the like.
The polymer waterproof roll has the advantages of high performance, simplicity and convenience in construction and the like as a novel waterproof material, and the waterproof roll has the advantages of simple structure, environmental friendliness and the like, and is widely applied to basement bottom plates. In the construction of waterproof engineering projects, when a high-molecular waterproof coiled material is paved, lap joint construction needs to be carried out on the coiled material and the coiled material, a waterproof system is formed on a concrete layer, and the splicing mode mainly comprises hot air welding and adhesive tape lap joint, but hidden dangers such as missing welding, small welding surface, unfirm welding points and the like can occur in the hot air welding; the problems of poor low-temperature viscosity, insufficient bonding with a concrete base layer and the like exist in the overlapping of the adhesive tapes.
Disclosure of Invention
In view of the above problems, the present application provides, in a first aspect, a two-component waterproof coating material formed by mixing and reacting a component a and a component B, wherein the mixing mass ratio of the component a to the component B is 1:0.9 to 1:1.1;
the component A comprises: 40-50 parts by weight of hydroxyl-terminated polybutadiene; 20-30 parts of liquid rubber; 16-26 parts of viscose resin; 4-14 parts by weight of polyisocyanate;
the component B comprises: 59-69 parts by weight of hydroxyl-terminated polybutadiene; 13-23 parts of liquid rubber; 13 to 23 parts by weight of tackifying resin.
Optionally, the two-component waterproof coating is formed by mixing and reacting a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1;
the component A is as follows: 40-50 parts by weight of hydroxyl-terminated polybutadiene; 20-30 parts of liquid rubber; 16-26 parts of viscose resin; 4-14 parts by weight of polyisocyanate; 0-0.5 parts by weight of a first additive;
the component B comprises: 59-69 parts by weight of hydroxyl-terminated polybutadiene; 13-23 parts of liquid rubber; 13-23 parts of tackifying resin; 0-10 parts of second additive.
Alternatively, in the two-component waterproof coating, n (-NCO/-OH) =0.8:1 to 0.9:1.
optionally, the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.45-1.40 mmol/g; and/or the hydroxyl-terminated polybutadiene has a number average molecular weight of 1400 to 4500g/mol.
Optionally, the polyisocyanate comprises at least one of dicyclohexylmethane diisocyanate (HMDI), toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI).
Optionally, the liquid rubber comprises one or more of polyisobutylene PB400, polyisobutylene PB450, polyisobutylene PB680, polyisobutylene PB 950.
Optionally, the liquid rubber has a number average molecular weight of 400 to 950.
Optionally, the tackifying resin comprises one or more of a C5 petroleum resin, a C9 petroleum resin, a rosin modified resin, a terpene resin, a coumarone resin, a copolymer resin, a hydrogenated petroleum resin, a modified petroleum resin.
Optionally, the first additive comprises one or more of sodium oleate, octadecylamine, sodium laurate, cocoamine, sodium stearate, sodium lauryl sulfate, dodecylamine, sodium dodecylbenzenesulfonate, or the like.
Optionally, the second additive comprises one or more of attapulgite, china clay, porcelain powder, alumina powder, and the like.
In a second aspect, the present application provides a method for preparing a two-component waterproof coating material, for preparing the waterproof coating material, including the following steps:
preparation of the component A: mixing and dissolving 40-50 parts by weight of hydroxyl-terminated polybutadiene, 20-30 parts by weight of liquid rubber, 16-26 parts by weight of tackifying resin and 0-0.5 part by weight of first additive, carrying out vacuum dehydration to obtain a first mixed material, adding 4-14 parts by weight of polyisocyanate into the first mixed material for reaction, cooling and carrying out vacuum defoaming to obtain a component A;
preparation of the component B: mixing and dissolving 59-69 parts by weight of hydroxyl-terminated polybutadiene, 13-23 parts by weight of liquid rubber, 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive, performing vacuum dehydration, and performing vacuum defoaming after cooling to obtain a component B;
the preparation of the component A and the preparation of the component B are carried out according to the mixing mass ratio of 1:0.9 to 1:1.1 mixing was carried out.
Optionally, the step of obtaining component a comprises: mixing 40-50 parts by weight of hydroxyl-terminated polybutadiene and 20-30 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 16-26 parts by weight of tackifying resin and 0-0.5 part by weight of first additive in batches, and after complete dissolution, carrying out vacuum dehydration, wherein the vacuum degree is as follows: dewatering for 2-3 h at-0.09-0.1 mPa to obtain a first mixed material, cooling the mixed material to 85-90 ℃, adding 4-14 parts by weight of polyisocyanate, reacting for 3h, cooling to 65 ℃, and defoaming in vacuum;
the step of obtaining the component B comprises the following steps: mixing 59-69 parts by weight of hydroxyl-terminated polybutadiene and 13-23 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive in batches, and after completely dissolving, carrying out vacuum dehydration, wherein the vacuum degree is as follows: dewatering for 2-3 h under minus 0.09-minus 0.1 mPa; after dehydration, the temperature is reduced to 70 ℃ and then vacuum defoamation is carried out.
In a third aspect, the present application provides a waterproof structure for building, comprising a two-component waterproof coating material as described above, and a polymeric waterproof roll bonded by the two-component waterproof coating material.
Compared with the prior art, the application has at least the following beneficial effects:
the application provides a two-component waterproof coating, which is suitable for bonding a high-molecular waterproof coiled material. The application provides a two-component waterproof coating, which belongs to a reaction type bonding coating, utilizes hydroxyl-OH with high activity of hydroxyl-terminated polybutadiene, takes polyisocyanate as a chain extension group, realizes a permanent incomplete curing state after the reaction of the coating, adds liquid rubber and tackifying resin into a formula system, increases the Van der Waals force among molecules, can form a compact bonding structure among molecules of a high-molecular waterproof coiled material by adjusting the content of each raw material component, and has good waterproof and water channeling prevention performances.
Detailed Description
In order to make the purpose, technical solution and advantageous technical effects of the present invention clearer, the present invention is further described in detail with reference to the following embodiments. It should be understood that the embodiments described in this specification are only for the purpose of explaining the present application and are not intended to limit the present application.
For the sake of brevity, only some numerical ranges are explicitly disclosed herein. However, any lower limit may be combined with any upper limit to form ranges not explicitly recited; and any lower limit may be combined with any other lower limit to form a range not explicitly recited, and similarly any upper limit may be combined with any other upper limit to form a range not explicitly recited. Also, although not explicitly recited, each point or individual numerical value between the endpoints of a range is encompassed within that range. Thus, each point or individual value may, as its lower or upper limit, be combined with any other point or individual value or with other lower or upper limits to form ranges not explicitly recited.
In the description herein, when a composition is described as containing, comprising, or including a particular component, or when a process is described as containing, comprising, or including a particular process step, it is contemplated that the composition of the present application also consists essentially of, or consists of, the component, and that the process of the present application also consists essentially of, or consists of, the process step.
The use of the terms "comprising," "including," "containing," and "having" are generally to be construed as open-ended and non-limiting unless otherwise expressly specified.
In the description herein, it is to be noted that, unless otherwise specified, "above" and "below" are inclusive, and "a plurality" of "one or more" means two or more.
The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through a list of embodiments that can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.
The polymer waterproof coiled material has the advantages of high performance, simplicity and convenience in construction and the like as a novel waterproof material, and the construction process is characterized in that the coiled material is lapped with the coiled material to form a waterproof system on the concrete layer. In the prior art, when the coiled material is lapped with the coiled material, the lapping of the long edge of the coiled material is carried out by utilizing a self-adhesive layer and the lapped coiled material, and the adhesive layer mainly comprises hot-melt pressure-sensitive adhesive and butyl adhesive. And the short edges, the internal and external corners, the parapet walls, the drainage pipe fittings, the ventilation pipelines, the reserved wall upright column corners and other joint parts are all welded by hot air or lapped by adhesive tapes for lapping.
The inventor of the application notices that hidden troubles such as welding leakage, small welding surface, infirm welding spot and the like can occur in hot air welding; the lap joint mode of the lap joint adhesive tape is that joint lap joint is carried out on coiled materials, adhesive tapes and coiled materials, the problems of poor low-temperature viscosity, insufficient bonding with a concrete base layer and poor self-healing exist, particularly, the effect of full-adhesion in percentage cannot be achieved at joints, chamfers, internal and external corners and the like, and furthermore, shrinkage phenomena possibly occur at cutting edges of the adhesive tapes, namely, hidden dangers exist at the lap joints of all nodes to cause the water resistance to lose efficacy.
In view of the above problems, the present application provides a two-component waterproof coating and a preparation method thereof, so as to improve the bonding strength.
The application provides in a first aspect a waterproof coating for two ingredients, is formed by the mixing reaction of a component A and a component B, and the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1;
the component A comprises the following raw materials: 40-50 parts by weight of hydroxyl-terminated polybutadiene; 20-30 parts of liquid rubber; 16-26 parts of tackifying resin; 4-14 parts of polyisocyanate;
the component B comprises the following raw materials: 59-69 parts by weight of hydroxyl-terminated polybutadiene; 13-23 parts of liquid rubber; 13 to 23 parts by weight of tackifying resin.
The raw materials of the component A comprise hydroxyl-terminated polybutadiene and polyisocyanate, the hydroxyl-terminated polybutadiene and the polyisocyanate are dissolved and then react for 3 hours at a set reaction temperature, illustratively, the reaction temperature is 85-90 ℃, the reaction time is 3 hours, polymerization reaction occurs after dehydration, and-OH groups in the hydroxyl-terminated polybutadiene and-NCO groups in the polyisocyanate are combined.
The polyisocyanate may be a diisocyanate or a triisocyanate, which is not limited in this application.
The raw material of the component B comprises hydroxyl-terminated polybutadiene, the component A is mixed with the dissolved component B, and the weight part of the hydroxyl-terminated polybutadiene in the component B is controlled, so that the residual-NCO groups in the polybutadiene prepolymer in the component A can continuously react with the-OH groups in the hydroxyl-terminated polybutadiene in the component B, and the permanent waterproof coating in the incomplete curing state is obtained after the reaction is finished.
According to the embodiment of the application, the liquid rubber and the tackifying resin are added into the formula system, so that the intermolecular van der Waals force is increased, and the contents of the raw material components are adjusted, so that a compact bonding structure can be formed among the molecules of the high-molecular waterproof roll, and the high-molecular waterproof roll has good waterproof and water channeling prevention performances.
The two-component waterproof coating provided by the embodiment of the application belongs to a reactive type bonding coating, hydroxyl-OH with high activity of hydroxyl-terminated polybutadiene is utilized, polyisocyanate is used as a chain extension group, and the A component and the B component react to obtain the permanent waterproof coating in a non-complete curing state, so that the two-component waterproof coating is suitable for bonding high-molecular waterproof rolls, and liquid rubber and tackifying resin are added into a formula system, so that the van der Waals force among molecules is increased, the bonding of the high-molecular waterproof rolls is facilitated, a compact structure is formed among the molecules, and the two-component waterproof coating has good waterproof and water channeling prevention performances.
The waterproof coating has good flow characteristic, is mixed according to a specified proportion during application and construction, is simple and convenient to construct, and can be constructed in a large area. Compared with the traditional lap joint adhesive tape, when the joint part is bonded, the effect of full adhesion in percentage is well realized, and the hidden waterproof troubles of missing welding, insufficient welding, adhesive tape shrinkage, incomplete adhesion of joints and the like during the lap joint of the high-molecular waterproof coiled material are completely avoided. As a reaction type bonding coating, the adhesive has the advantages of simple and convenient construction, no seam, simple node treatment, good initial adhesion, excellent mechanical property, environmental protection, no pollution, good waterproof and waterproof properties, and certain initial adhesion in a low-temperature environment.
In some embodiments, the two-component waterproof coating is formed by mixing and reacting a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1;
the component A is as follows: 40-50 parts by weight of hydroxyl-terminated polybutadiene; 20-30 parts of liquid rubber; 16-26 parts of viscose resin; 4-14 parts by weight of polyisocyanate; 0-0.5 parts by weight of a first additive;
the component B is as follows: 59-69 parts by weight of hydroxyl-terminated polybutadiene; 13-23 parts of liquid rubber; 13-23 parts of tackifying resin; 0-10 parts of second additive.
In some embodiments, n (-NCO/-OH) =0.8:1 to 0.9:1. according to an embodiment according to the present application, the ratio of n (-NCO/-OH) =0.8:1 to 0.9:1, on one hand, the-NCO group in the system can be completely reacted, and the linearity of a molecular chain is ensured; on the other hand, in this range, a polymer having a larger molecular weight can be produced, and the initial adhesion, mechanical properties and the like of the coating film of the waterproof coating material can be optimized.
In some embodiments, the hydroxyl terminated polybutadiene has a hydroxyl number of 0.45 to 1.40mmol/g; and/or the hydroxyl-terminated polybutadiene has a number average molecular weight of 1400 to 4500g/mol.
The molecular weight of the hydroxyl-terminated polybutadiene is controlled within the proper range, so that the processing performance and the service performance of the waterproof coating can be improved.
Illustratively, the hydroxyl-terminated liquid polybutadiene is one or a mixture of more of Zibozilong chemical industry Co., ltd, HTPB-I, HTPB-II, HTPB-III, HTPB-IV, HTPB-V and HTPB-VI.
In some embodiments, the polyisocyanate includes at least one of dicyclohexylmethane diisocyanate (HMDI), toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI).
In some embodiments, the liquid rubber comprises one or more of polyisobutylene PB400, polyisobutylene PB450, polyisobutylene PB680, polyisobutylene PB 950. The polyisobutylene has good air tightness, chemical resistance and good compatibility with rubber. The waterproof coating contains polyisobutylene, and can improve the aging resistance, weather resistance, bending fracture resistance, water tightness and air tightness of the coating at high temperature.
The liquid rubber is polyisobutylene, and is selected from one or more of polyisobutylene with the trade names of PB400, PB450, PB680 and PB950 from Korean Dalin company.
In some embodiments, the tackifying resin comprises at least one of a C5 petroleum resin, a C9 petroleum resin, a rosin modified resin, a terpene resin, a coumarone resin, a copolymer resin, a hydrogenated petroleum resin, a modified petroleum resin. For example, the tackifying resin may be a C5 petroleum resin, and the tackifying resin may be a mixture of a C5 petroleum resin and a rosin-modified resin.
Illustratively, the tackifying resin is petroleum resin selected from one or more of C9 heat polymerized petroleum resins of the type PR-100-10, PR-110-10, PR-100-11 and PR-110-11 from the Ghe materials science and technology corporation.
In some embodiments, the polyisobutylene has a number average molecular weight of 400 to 950. The polyisobutylene with the molecular weight range has low viscosity, is convenient to operate, and is beneficial to improving the adhesion of the waterproof coating to the coiled material.
In some embodiments, the mixing mass ratio of the component A and the component B is 1:0.9 to 1:1.
mixing the component A and the component B according to the mass ratio of 1:0.9 to 1:1, on one hand, the-NCO group in the system can be completely reacted, and the molecular chain is ensured to be linear; on the other hand, in this range, a polymer having a larger molecular weight can be produced, and the initial adhesion, mechanical properties and the like of the coating film of the waterproof coating material can be optimized.
In some embodiments, the first additive is a surfactant, illustratively including one or more of sodium oleate, octadecylamine, sodium laurate, cocoamine, sodium stearate, sodium lauryl sulfate, dodecylamine, sodium dodecylbenzenesulfonate, or the like. The first additive is a surfactant, so that the surface tension can be reduced, and the affinity of the waterproof coating to the coiled material can be improved.
In some embodiments, the second additive comprises one or more of attapulgite, china clay, china powder, alumina powder, and the like. The filler can improve the adhesion of the waterproof coating.
In some embodiments, component A includes 0 to 10 parts by weight of the second additive and component B includes 0 to 0.5 parts by weight of the first additive. In a second aspect, the present application provides a method for preparing a two-component waterproof coating, for preparing the two-component waterproof coating, comprising the following steps:
preparation of the component A: mixing and dissolving 40-50 parts by weight of hydroxyl-terminated polybutadiene, 20-30 parts by weight of liquid rubber, 16-26 parts by weight of tackifying resin and 0-0.5 part by weight of first additive, carrying out vacuum dehydration to obtain a first mixed material, adding 4-14 parts by weight of polyisocyanate into the first mixed material for reaction, cooling and carrying out vacuum defoaming to obtain a component A;
preparation of the component B: mixing and dissolving 59-69 parts by weight of hydroxyl-terminated polybutadiene, 13-23 parts by weight of liquid rubber, 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive, performing vacuum dehydration, and performing vacuum defoaming after cooling to obtain a component B;
the preparation of the component A and the preparation of the component B are carried out according to the mixing mass ratio of 1:0.9 to 1:1.1 mixing.
The preparation method of the double-component waterproof coating is simple and convenient to operate, the prepared waterproof coating can generate good adhesive force with a high-molecular coiled material, can be soaked in water for a long time without falling off, and can resist various severe environments.
In some embodiments, the step of obtaining component a comprises: mixing 40-50 parts by weight of hydroxyl-terminated polybutadiene and 20-30 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 16-26 parts by weight of tackifying resin and 0-0.5 part by weight of first additive in batches, and after completely dissolving, carrying out vacuum dehydration, wherein the vacuum degree is as follows: dehydrating for 2-3 h under the pressure of-0.09 to-0.1 mPa to obtain a first mixed material, cooling the mixed material to 85-90 ℃, adding 4-14 parts by weight of polyisocyanate, reacting for 3h, cooling to 65 ℃, and defoaming in vacuum;
the step of obtaining the component B comprises the following steps: mixing 59-69 parts by weight of hydroxyl-terminated polybutadiene and 13-23 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive in batches, and after completely dissolving, carrying out vacuum dehydration, wherein the vacuum degree is as follows: dewatering for 2-3 h under minus 0.09-minus 0.1 mPa; after dehydration, the temperature is reduced to 70 ℃ and then vacuum defoamation is carried out.
The third aspect of the present application provides a building waterproof structure, which comprises the two-component waterproof coating material as described above, and a polymer waterproof coiled material bonded by the two-component waterproof coating material.
Examples
The present disclosure is more particularly described in the following examples that are intended as illustrations only, since various modifications and changes within the scope of the present disclosure will be apparent to those skilled in the art. Unless otherwise indicated, all parts, percentages, and ratios reported in the following examples are on a weight basis, and all reagents used in the examples are commercially available or synthesized according to conventional methods and can be used directly without further treatment, and the equipment used in the examples is commercially available.
The following examples use the following sources of starting materials:
hydroxyl-terminated polybutadiene: purchased from ZiboQilong chemical Co., ltd, brand: HTPB-I, HTPB-II, HTPB-III, HTPB-IV, HTPB-V, HTPB-VI;
petroleum resin: commercially available from Henghe materials science and technology Co., ltd, C9 thermal polymerized petroleum resin, brand: PR-100-10, PR-110-10, PR-100-11, PR-110-11;
polyisobutylene: purchased from korea daling corporation under the brand: at least one of PB400, PB450, PB680, and PB 950.
Example 1:
the component A comprises the following raw materials:
45 parts of HTPB-IV;
PB400, 25 parts;
PR-100-10, 21 parts;
HMDI,9 parts;
the component B comprises the following raw materials:
64 parts of HTPB-IV;
PB400, 18 parts;
PR-100-10, 18 parts;
the coating material proportion is as follows: a: B =1
The preparation of the component A comprises the following steps:
adding 45 parts of HTPB-IV and 25 parts of PB400 into a four-neck flask, starting stirring, heating to 105-110 ℃, gradually adding 21 parts of petroleum resin PR-100-10 in batches, and after complete dissolution, performing vacuum dehydration in a vacuum degree: 0.09 to 0.1mPa below zero, and dehydrating for 2.5h;
cooling to 85-90 ℃, adding 9 parts of HMDI, and reacting for 3h;
after the reaction is finished, the temperature is reduced to 65 ℃, and the materials are discharged after vacuum defoamation.
The preparation step of the component B:
adding 64 parts of HTPB-IV and 18 parts of PB400 into a four-neck flask, starting stirring, heating to 105-110 ℃, gradually adding 18 parts of petroleum resin PR-100-10 in batches, and after complete dissolution, performing vacuum dehydration with a vacuum degree: 0.09 to 0.1mPa below zero, and dehydrating for 2.5h;
after dehydration is finished, cooling to 70 ℃;
and (4) vacuum defoaming and discharging.
Example 2:
the component A comprises the following raw materials:
42 parts of HTPB-II;
PB400, 27 parts;
PR-100-10, 22 parts;
TDI,8 parts;
0.2 part by weight of sodium oleate;
the component B comprises the following raw materials:
67 parts of HTPB-II;
PB400, 19 parts;
PR-100-10, 19 parts;
clay (300 mesh), 5 parts by weight.
The coating comprises the following components in percentage by weight: a: B =1
The preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in example 2.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in example 2.
Example 3:
the component A comprises the following raw materials:
48 parts of HTPB-V;
PB400, 26 parts;
PR-100-10 in 22 portions;
MDI (diphenyl-methane-diisocyanate) 10 parts;
the component B comprises the following raw materials:
67 parts of HTPB-V;
PB400, 18 parts;
PR-100-10, 20 portions;
the coating comprises the following components in percentage by weight: a: B =1
The preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in example 2.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in example 2.
Comparative example 1: ( Polyether polyol D-2000, molecular weight: 2000, bifunctionality )
The component A comprises:
d-2000, 45 parts;
PB400, 25 parts
PR-100-10, 21 parts;
HMDI,9 parts;
and the component B comprises:
d-2000, 64 parts;
PB400, 18 parts;
PR-100-10, 18 parts;
the coating material proportion is as follows: a: B =1
The preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in comparative example 1.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in comparative example 1.
Comparative example 2: ( Polyester polyol PE-2348, molecular weight: 2300, bifunctionality, zhejiang Huafeng New materials Co., ltd )
And (2) component A:
45 parts of PE-2348;
PB400, 25 parts;
PR-100-10 parts;
HMDI,9 parts;
and B component:
PE-2348, 64 parts;
PB400, 18 parts;
PR-100-10, 18 parts;
the coating material proportion is as follows: a: B =1
The preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in comparative example 2.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in comparative example 2.
Comparative example 3:
the component A comprises the following raw materials:
45 parts of HTPB-IV;
PB400, 25 parts;
PR-100-10, 21 parts;
HMDI,9 parts;
the component B comprises the following raw materials:
50 parts of HTPB-IV;
PB400, 23 parts;
PR-100-10, 23 parts;
the coating comprises the following components in percentage by weight: a: B =1
The preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in comparative example 3.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in comparative example 3.
Comparative example 4:
the component A comprises the following raw materials:
45 parts of HTPB-IV;
HMDI,9 parts;
the component B comprises the following raw materials:
64 parts of HTPB-IV;
PB400, 43 parts;
PR-100-10, 39 parts;
the coating comprises the following components in percentage by weight: a: B = 1;
the preparation of the component A comprises the following steps: similar to example 1, except that the weight parts of each raw material were added as in comparative example 4.
The preparation step of the component B: similar to example 1, except that the weight parts of each raw material were added as in comparative example 4.
Comparative example 5:
the component A comprises the following raw materials:
45 parts of HTPB-IV;
PB400, 25 parts;
PR-100-10, 21 parts;
HMDI,9 parts;
the component B comprises the following raw materials:
64 parts of HTPB-IV;
PB400, 18 parts;
PR-100-10, 18 parts;
the coating material proportion is as follows: a: B = 1.
The preparation steps of the component A and the component B are as follows: same as in example 1.
Comparative example 6:
the component A comprises the following raw materials:
45 parts of HTPB-IV;
PB400, 25 parts;
PR-100-10, 21 parts;
HMDI,9 parts;
the component B comprises the following raw materials:
64 parts of HTPB-IV;
PB400, 18 parts;
PR-100-10, 18 parts;
the coating material proportion is as follows: a: B = 1.3.
The preparation steps of the component A and the component B are as follows: same as in example 1.
Performance test
Test item 1: viscosity. And (4) testing standard: according to GB/T2794.
Test item 2: coil to coil peel strength. And (4) testing standard: according to GB/T328.20-2007.
Test item 3: low temperature bendability. And (4) testing standard: according to GB/T16777-2008.
Test item 4: water channeling resistance. And (4) testing standard: according to JC/T2428-2017.
Test item 5: and (4) self-healing. And (4) testing standard: according to GB/T23457-2017.
Comparing examples 1-3 with comparative examples 1-3, it can be seen that the present application provides excellent performance of waterproof coatings by adding hydroxyl polybutadiene to the coating and using polyisocyanate as a chain extension group to react component A with component B. Compared with comparative examples 1 and 2, the hydroxyl-terminated polybutadiene is adopted instead of polyester polyol or polyether polyol, so that the peeling strength between the coiled material and the coiled material is obviously enhanced, and the viscosity is enhanced; compared with the comparative example 3, the low-temperature performance of the waterproof coating is enhanced by adjusting the content of the raw material components. Compared with comparative example 4, the viscosity is reduced by adjusting the liquid rubber in the raw materials, and the processing is facilitated. Compared with comparative example 5 and comparative example 6, the waterproof performance is improved by adjusting the proportion relation of the components A and B in the raw materials, and the reason that the comparative example 5 and comparative example 6 can not effectively prevent water is probably that the waterproof coating which can obtain a permanent incomplete curing state can not be formed because the hydroxyl-OH in the hydroxyl-terminated polybutadiene is not matched with the number of-NCO groups in polyisocyanate.
To sum up, the application provides a two-component waterproof coating, belong to reaction type adhesive coating, utilize terminal hydroxyl polybutadiene to have very high active hydroxyl-OH, regard polyisocyanate as chain extension group, through A component and B component reaction, obtain the waterproof coating of permanent incomplete solidification state, be applicable to bonding polymer waterproof coiled material, and add liquid rubber, tackifying resin in the formula system, make intermolecular van der Waals' force increase, be favorable to bonding polymer waterproof coiled material its intermolecular formation compact structure, have fine waterproof and prevent scurrying the water quality.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The two-component waterproof coating is characterized by being formed by mixing and reacting a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1;
the component A comprises:
40-50 parts by weight of hydroxyl-terminated polybutadiene;
20-30 parts of liquid rubber;
16-26 parts of tackifying resin;
4-14 parts by weight of polyisocyanate;
the component B comprises:
59-69 parts by weight of hydroxyl-terminated polybutadiene;
13-23 parts of liquid rubber;
13 to 23 parts by weight of tackifying resin.
2. The two-component waterproof coating material of claim 1, which is formed by mixing and reacting a component A and a component B, wherein the mixing mass ratio of the component A to the component B is 1:0.9 to 1:1.1;
the component A comprises the following components:
40-50 parts by weight of hydroxyl-terminated polybutadiene;
20-30 parts of liquid rubber;
16-26 parts of tackifying resin;
4-14 parts by weight of polyisocyanate;
0-0.5 parts by weight of a first additive;
the component B comprises:
59-69 parts by weight of hydroxyl-terminated polybutadiene;
13-23 parts of liquid rubber;
13-23 parts of tackifying resin;
0-10 parts of second additive.
3. The two-component waterproof coating material according to claim 1 or 2, wherein n (-NCO/-OH) =0.8:1 to 0.9:1.
4. the two-component waterproof coating material according to claim 1 or 2, wherein the hydroxyl value of the hydroxyl-terminated polybutadiene is 0.45 to 1.40mmol/g; and/or the presence of a gas in the gas,
the number average molecular weight of the hydroxyl-terminated polybutadiene is 1400-4500.
5. The two-component waterproof coating material according to claim 1 or 2, wherein the polyisocyanate comprises at least one of dicyclohexylmethane diisocyanate (HMDI), toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI).
6. The two-component waterproof coating material according to claim 1 or 2, wherein the liquid rubber comprises one or more of polyisobutylene PB400, polyisobutylene PB450, polyisobutylene PB680, polyisobutylene PB 950; and/or the presence of a gas in the gas,
the number average molecular weight of the liquid rubber is 400-950; and/or the presence of a gas in the atmosphere,
the tackifying resin comprises one or more of C5 petroleum resin, C9 petroleum resin, rosin modified resin, terpene resin, coumarone resin, copolymer resin, hydrogenated petroleum resin and modified petroleum resin.
7. The two-component waterproof coating of claim 2, wherein the first additive comprises one or more of sodium oleate, octadecylamine, sodium laurate, cocoamine, sodium stearate, sodium lauryl sulfate, dodecylamine, sodium dodecylbenzenesulfonate, or the like; and/or the presence of a gas in the gas,
the second additive comprises one or more of attapulgite, argil, clay, porcelain powder, alumina powder and the like.
8. A method for preparing a two-component waterproof coating material for preparing the waterproof coating material according to any one of claims 1 to 7, comprising the steps of:
preparation of the component A: mixing and dissolving 40-50 parts by weight of hydroxyl-terminated polybutadiene, 20-30 parts by weight of liquid rubber, 16-26 parts by weight of tackifying resin and 0-0.5 part by weight of first additive, performing vacuum dehydration to obtain a first mixed material, adding 4-14 parts by weight of polyisocyanate into the first mixed material for reaction, and performing vacuum deaeration after cooling to obtain the component A;
b, preparation of a component: mixing and dissolving 59-69 parts by weight of hydroxyl-terminated polybutadiene, 13-23 parts by weight of liquid rubber, 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive, performing vacuum dehydration, and performing vacuum defoaming after cooling to obtain the component B;
the preparation of the component A and the preparation of the component B are carried out according to the mixing mass ratio of 1:0.9 to 1.1.
9. The method for preparing a two-component waterproof coating material according to claim 8,
the step of obtaining the component A comprises the following steps: mixing 40-50 parts by weight of hydroxyl-terminated polybutadiene and 20-30 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 16-26 parts of tackifying resin and 0-0.5 part by weight of first additive in batches, and after completely dissolving, carrying out vacuum dehydration, wherein the vacuum degree is as follows: dewatering for 2-3 h at-0.09-0.1 mPa to obtain a first mixed material, cooling the mixed material to 85-90 ℃, adding 4-14 parts by weight of polyisocyanate, reacting for 3h, cooling to 65 ℃, and defoaming in vacuum;
the step of obtaining the component B comprises the following steps: mixing 59-69 parts by weight of hydroxyl-terminated polybutadiene and 13-23 parts by weight of liquid rubber, starting stirring, heating to 105-110 ℃, gradually adding 13-23 parts by weight of tackifying resin and 0-10 parts by weight of second additive in batches, and after completely dissolving, carrying out vacuum dehydration, wherein the vacuum degree is as follows: 0.09 to 0.1mPa below zero, and dehydrating for 2 to 3 hours; after dehydration, the temperature is reduced to 70 ℃ and vacuum defoamation is carried out.
10. A waterproof structure for buildings comprising the two-component waterproof coating material of any one of claims 1 to 7 and a polymeric waterproof roll bonded by the two-component waterproof coating material.
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| CN115418162A (en) * | 2022-09-30 | 2022-12-02 | 佛山市科顺建筑材料有限公司 | Two-component polyurethane waterproof coating composition, preparation method thereof and structure applying two-component polyurethane waterproof coating composition |
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| JPS63120785A (en) * | 1986-11-10 | 1988-05-25 | Yokohama Rubber Co Ltd:The | Reactive hot-melt adhesive composition |
| CN112920701A (en) * | 2019-08-02 | 2021-06-08 | 江苏凯伦建材股份有限公司 | Preparation method of double-component normal-temperature non-cured asphalt polyurethane waterproof coating |
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