CN114231178B - Hot-melt rubber asphalt waterproof coating and preparation method thereof - Google Patents

Abstract

The invention relates to a hot-melt rubber asphalt waterproof coating and a preparation method thereof. The technical scheme is as follows: the composition is characterized by comprising the following raw materials in parts by weight: 100 to 105 portions of petroleum asphalt, 8 to 12 portions of modifier, 2 to 4 portions of tackifier, 1.5 to 3 portions of functional additive, 14 to 20 portions of compatilizer and 66 to 80 portions of filler; the beneficial effects are as follows: the invention solves the defects of weak lap joint of the coiled materials, sagging in vertical wall construction, falling off of the composite coiled materials, incapability of independent single-channel use and the like caused by low cohesive strength and adhesive strength, water pressure resistance and the like of the hot-melt non-cured rubber asphalt waterproof coating, and improves the construction reliability and the application field thereof; the invention adopts environment-friendly low-smoke asphalt for production, no waste rubber powder is added, air pollutants such as nitrogen oxides, sulfides, asphalt smoke and the like and odor and pungent taste are greatly reduced in the production process, the treatment difficulty of waste water for production and cooling is also obviously reduced, and the invention has obvious quality and environment-friendly advantages.

Description

Hot-melt rubber asphalt waterproof coating and preparation method thereof

Technical Field

The invention relates to a modified asphalt waterproof coating, in particular to a hot-melt rubber asphalt waterproof coating and a preparation method thereof.

Background

Traditional waterproof coatings are generally divided into three main categories according to the curing principle: comprises a reaction type coating which is formed by the reaction of components and components or the reaction and solidification of the components and water vapor in the air, a water-based coating which is formed by the volatilization and solidification of water and a solvent-based coating which is formed by the volatilization and solidification of a solvent. The waterproof coating is generally a liquid material after leaving a factory, and is cured to form a uniform coating after construction and use, and the waterproof coating mainly plays a role in building waterproofing. The hot-melt rubber asphalt waterproof coating is different from the traditional waterproof coating and is a flexible hot-melt construction type elastic waterproof coating prepared by mixing rubber and asphalt as main components and adding an auxiliary agent. The coating is a uniform solid at normal temperature, is heated and melted, is constructed, and forms a uniform coating waterproof layer after cooling. The whole process only has physical reaction and does not have chemical reaction. Similar to the construction and application of the hot-melt rubber asphalt waterproof coating, the non-cured rubber asphalt waterproof coating and the hot-melt rubber asphalt waterproof coating can be collectively called as a hot-melt type waterproof coating. However, the hot-melt rubber asphalt waterproof coating and the non-cured rubber asphalt waterproof coating are not the same product. The following similarities and differences exist between the two:

the similarity mainly includes:

1) The raw materials used by the two are similar, and the two are high-solid-content solvent-free waterproof coatings which adopt modified asphalt as a basic raw material;

2) The construction application methods of the two are similar, and hot melting construction can be adopted. But the non-curing rubber asphalt waterproof coating can be sprayed by hot melting, and the hot melting rubber asphalt waterproof coating is not suitable for spraying due to higher viscosity and is only suitable for blade coating by hot melting;

3) The two have similar purposes, and are constructed and applied by a 'coil coating and compounding' method and matched with waterproof coiled materials such as asphalt base and the like for use;

4) Both are not suitable for exposed use and are only suitable for waterproofing of concealed projects such as underground waterproofing and the like.

The different points mainly include:

1) Appearance and application time states are different: the hot-melt rubber asphalt waterproof coating is in a solid block shape; the non-cured rubber asphalt waterproof coating is an uncured viscous body. When in application, the hot-melt rubber asphalt waterproof coating forms a solid waterproof coating film; the non-cured rubber asphalt waterproof coating always keeps an uncured viscous body state.

2) The performances are different: the hot-melt rubber asphalt waterproof coating has certain cohesive strength and is an elastomer material; the non-cured rubberized asphalt waterproofing paint has little cohesive strength and does not conduct stress generated from deformation of the base layer. When the modified asphalt waterproof coating is used with a coiled material in a composite mode, non-curing rubber asphalt waterproof coating is not suitable for lap joint of the coiled material, the hot-melt rubber asphalt coating has good cohesive strength and bonding strength, and can be used for lap joint of the coiled material and is also suitable for bonding harder and thicker modified asphalt polyester tire waterproof coiled materials and the like.

3) The functions are different: the non-cured rubber asphalt waterproof coating cannot be used independently in a single way underground due to low cohesive strength and water pressure resistance, and must be matched with a coiled material to prepare a secondary waterproof layer; the hot melt rubber asphalt coating can be matched with the tire base for independent single-pass use.

Therefore, the hot-melt rubber asphalt waterproof coating does not have the creep property and dynamic waterproof property of the non-cured rubber asphalt waterproof coating, but is superior to the non-cured rubber asphalt waterproof coating in the application of coil overlapping and underground engineering.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides the hot-melt rubber asphalt waterproof coating and the preparation method thereof, overcomes the defects of infirm lap joint of the coiled materials, sagging in vertical wall construction, falling off of the composite coiled materials, incapability of independent single-pass use and the like caused by low cohesive strength and adhesive strength, water pressure resistance and the like of the hot-melt non-cured rubber asphalt waterproof coating, improves the construction reliability of the waterproof coating, and widens the application field of the waterproof coating.

The invention provides a hot-melt rubber asphalt waterproof coating and a preparation method thereof, and the technical scheme is as follows: the composition is characterized by comprising the following raw materials in parts by weight: 100-105 parts of petroleum asphalt, 8-12 parts of modifier, 2-4 parts of tackifier, 1.5-3 parts of functional additive, 14-20 parts of compatilizer and 66-80 parts of filler;

the petroleum asphalt adopts any one of naphthenic base low-smoke asphalt AH-70 and AH-90, the modifier is a mixture of SBS and SBR, the tackifier is C5/C9 copolymerized petroleum resin, the compatilizer is a mixture of aromatic oil and naphthenic oil in any ratio, and the filler is talcum powder.

Preferably, the functional auxiliary is a linear saturated polyolefin.

Preferably, the polyolefin with a linear saturated structure is an ethylene oxide homopolymer, the main technical parameters of which include: the ring-and-ball method has a softening point of about 130 ℃ and a rotational viscosity of 4000 to 5000mPa.s at 150 ℃.

Preferably, the petroleum asphalt adopts naphthenic base low-smoke asphalt AH-70 produced by an atmospheric and vacuum distillation process, the ring and ball softening point of the petroleum asphalt is above 45 ℃, the needle penetration is about 70dmm, the 15 ℃ time delay is more than 1500mm, and the smoke volatilization volume is 2h under the condition of 180 ℃: the mass fraction is less than or equal to 0.5 percent.

Preferably, the SBS is a mixture of linear and star shapes, and the linear block ratio is S/B =30/70 to 40/60; and the SBS has weight average molecular weight of 10-20 ten thousand, and the melt mass flow rate under 10kg load at 230 deg.c is 0.05-0.8 g/10min.

Preferably, the SBR is a linear solution random copolymer, and the technical parameters comprise: according to the mass fraction, the combined styrene content is 24-26%, the vinyl content is 17-18%, and the melt mass flow rate under 10kg load at 230 ℃ is 0.1-0.6 g/10min; in the case of a mixture with SBS, the preferred mass ratio of SBS to SBR is 2.

The tackifier is C5/C9 copolymerized petroleum resin with a ring-and-ball softening point of more than 105 ℃.

The compatilizer is a mixture of aromatic oil and naphthenic oil in any ratio, and the technical parameters are as follows: the volatile matter content of the mixture is more than or equal to 210 ℃ in an opening flash point and 2h at 180 ℃: the mass fraction is less than or equal to 2.5 percent. The fineness of the talcum powder is 180-400 meshes.

The preparation method of the hot-melt rubber asphalt waterproof coating provided by the invention comprises the following steps of:

1) Uniformly mixing the modifier, the tackifier and the functional auxiliary agent, and preparing modified master batch by mixing a proper amount of heavy traffic asphalt with a mixing type extruder for later use;

2) Adding the heavy traffic asphalt and the compatilizer into a vertical batching tank, stirring and mixing at a stirring speed of 30-40 r/min, and heating to 150-160 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture obtained in the step 2), continuously heating to 165-175 ℃ at a stirring speed of 40-50 r/min, and circularly grinding for 2-3 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding a filler, continuously cooling and stirring at a stirring speed of 20-30 r/min to 140 +/-10 ℃, and then carrying out a filling process.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention has high solid content and almost no solvent and volatile matter;

2. the invention has good heat resistance, low temperature resistance and extensibility;

3. the invention has good self-healing property. During construction, the waterproof layer can be automatically repaired even if the waterproof layer is damaged, and the complete and seamless waterproof layer is maintained;

4. the invention has good bonding property. The waterproof paint can adapt to deformation of a base layer, can be bonded with waterproof base layers such as cement mortar, concrete, wood, metal, glass and the like to form a skin-type waterproof layer, and thoroughly avoids the occurrence of a water channeling phenomenon;

5. the product of the invention can be stored for a long time in a closed state without influencing the service performance.

6. The invention can be used as a single waterproof coating and can be compounded with asphalt-based waterproof coiled materials to form a composite waterproof layer;

7. the invention has low requirement on the water content of the base layer, and the base layer can be constructed without open water. The method creates excellent conditions for shortening the construction period of basement waterproofing construction;

8. the base layer of the invention has strong adaptability. Due to the excellent extensibility and cohesiveness of the material, the waterproof layer can adapt to structural deformation, and the waterproof layer cannot be damaged due to structural deformation.

In a word, the invention solves the defects of infirm lap joint of coiled materials, sagging and falling off in vertical wall construction (referring to composite coiled materials), incapability of independent single-pass use and the like caused by low cohesive strength and adhesive strength, water pressure resistance and the like of the hot-melt non-cured rubber asphalt waterproof coating, and improves the construction reliability and the application field thereof. The production of the environment-friendly low-smoke asphalt is adopted, no waste rubber powder is added, air pollutants such as nitrogen oxides, sulfides, asphalt smoke and the like and odor and pungent taste are greatly reduced in the production process, the treatment difficulty of the waste water for production cooling is also remarkably reduced, and the environment-friendly low-smoke asphalt has remarkable quality and environmental protection advantages.

Detailed Description

The preferred embodiments of the present invention are described below, and it should be understood that the preferred embodiments described herein are only for illustrating and explaining the present invention and are not to be construed as limiting the present invention.

Examples 1 to 4 are specific embodiments of the hot-melt rubber asphalt waterproofing paint and the preparation method thereof, and examples 5 to 8 are comparative examples designed by the inventors.

The raw materials used in the examples and comparative examples are further illustrated below:

wherein, the functional auxiliary agent is polyolefin with a straight chain saturated structure, the polyolefin with the straight chain saturated structure adopts ethylene oxide homopolymer, and the main technical parameters comprise: the softening point of the ring-and-ball method is about 130 ℃, and the rotational viscosity at 150 ℃ is 4000-5000mPa.s.

The petroleum asphalt adopts naphthenic base low-smoke asphalt AH-70 produced by an atmospheric and vacuum distillation process, the ring and ball softening point is above 45 ℃, the penetration degree is about 70dmm, the time delay at 15 ℃ is more than 1500mm, and the smoke volatilization volume is 2h at 180 ℃ as follows: the mass fraction is less than or equal to 0.5 percent.

The modifier is a mixture of SBS and SBR, wherein SBS is a mixture of linear and star type, and the linear block ratio is S/B = 30/70-40/60; the weight-average molecular weight of SBS is 10-20 ten thousand, the melt mass flow rate under 10kg load at 230 deg.C is 0.05-0.8 g/10min;

SBR is a linear solution polymerization random copolymer, and the technical parameters comprise: according to the mass fraction, the combined styrene content is 24-26%, the vinyl content is 17-18%, and the melt mass flow rate under the 10kg load at 230 ℃ is 0.1-0.6 g/10min; in the case of a mixture with SBS, the preferred mass ratio of SBS to SBR is 2.

The tackifier is C5/C9 copolymerized petroleum resin, and the softening point of the tackifier by a ring-and-ball method is more than 105 ℃.

The compatilizer is a mixture of aromatic oil and naphthenic oil in any ratio, and the technical parameters are as follows: the volatile matter content of the mixture is more than or equal to 210 ℃ in an opening flash point and 2h at 180 ℃: the mass fraction is less than or equal to 2.5 percent. The filler is talcum powder, and the fineness of the talcum powder is 180-400 meshes.

Example 1

The hot-melt rubber asphalt waterproof coating provided by the invention comprises the following raw materials in parts by weight: 100 parts of naphthenic heavy-traffic asphalt, 8 parts of modifier, 2 parts of tackifier, 3 parts of functional additive, 14 parts of compatilizer and 80 parts of filler; the preparation method also comprises the following steps:

1) Uniformly mixing the SBS modifier, the C5/C9 copolymerized petroleum resin tackifier and the functional auxiliary agent 8903 according to the formula amount, and mixing with 10 parts of AH-70 cycloalkyl heavy-traffic asphalt to prepare a modified master batch for later use by using a mixing type extruder;

2) Adding 90 parts of AH-70 cycloalkyl heavy-duty asphalt, 5 parts of aromatic oil and 9 parts of a compatilizer consisting of naphthenic oil into a vertical batching tank, stirring and mixing at a stirring speed of 30r/min, and heating to 155 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture in the step 2), continuously heating to 165 ℃ at a stirring speed of 40r/min, and circularly grinding for 2 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding 80 parts of filler, continuously cooling and stirring at a stirring speed of 20r/min to 140 +/-10 ℃, and then carrying out a filling process.

Example 2

The hot-melt rubber asphalt waterproof coating provided by the invention comprises the following raw materials in parts by weight: 90 parts of naphthenic base heavy-traffic asphalt, 10 parts of modifier, 4 parts of tackifier, 2.5 parts of functional additive, 20 parts of compatilizer and 75 parts of filler; the preparation method also comprises the following steps:

1) The formula amounts of SBS and SBR mixture (mass ratio 4: 1) Uniformly mixing a modifier, a C5/C9 copolymerized petroleum resin tackifier and 8903 serving as a functional auxiliary agent, and preparing modified master batch by mixing 10 parts of AH-70 cycloalkyl heavy-traffic asphalt by using a mixing type extruder for later use;

2) Adding 80 parts of AH-70 cycloalkyl heavy-traffic asphalt, 10 parts of aromatic oil and 10 parts of naphthenic oil into a vertical batching tank, stirring and mixing at the stirring speed of 35r/min, and heating to 160 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture in the step 2), continuously heating to 170 ℃ at a stirring speed of 45r/min, and circularly grinding for 2 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding 75 parts of filler, continuously cooling and stirring at a stirring speed of 25r/min to 140 +/-10 ℃, and then performing a filling process.

Example 3

The hot-melt rubber asphalt waterproof coating provided by the invention comprises the following raw materials in parts by weight: 100 parts of naphthenic heavy-traffic asphalt, 10 parts of modifier, 3 parts of tackifier, 2 parts of functional additive, 15 parts of compatilizer and 70 parts of filler; the preparation method also comprises the following steps:

1) Uniformly mixing SBS modifier, C5/C9 copolymerized petroleum resin tackifier and functional assistant 8903 in formula amount, and preparing modified master batch by mixing with 5 parts of AH-70 cycloalkyl heavy-duty asphalt with a mixing type extruder for later use;

2) Adding 95 parts of AH-70 cycloalkyl heavy-traffic asphalt, 5 parts of aromatic oil and 10 parts of naphthenic oil into a vertical batching tank, stirring and mixing at the stirring speed of 30r/min, and heating to 150 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture in the step 2), continuously heating to 175 ℃ at a stirring speed of 50r/min, and circularly grinding for 2 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding 70 parts of filler, continuously cooling and stirring at a stirring speed of 25r/min to 140 +/-10 ℃, and then performing a filling process.

Example 4

The hot-melt rubber asphalt waterproof coating provided by the invention comprises the following raw materials in parts by weight: 105 parts of cycloalkyl heavy-duty asphalt, 12 parts of modifier, 2 parts of tackifier, 1.5 parts of functional additive, 14 parts of compatilizer and 66 parts of filler; the preparation method also comprises the following steps:

1) The formula amounts of SBS and SBR mixture (mass ratio 2: 1) Uniformly mixing a modifier, a C5/C9 copolymerized petroleum resin tackifier and 8903 serving as a functional auxiliary agent, and preparing modified master batch by using a mixing type extruder together with 15 parts of AH-70 cycloalkyl heavy-traffic asphalt for later use;

2) Adding 90 parts of AH-70 cycloalkyl heavy-traffic asphalt, 4 parts of aromatic oil and 10 parts of naphthenic oil into a vertical batching tank, stirring and mixing at the stirring speed of 40r/min, and heating to 155 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture obtained in the step 2), continuously heating to 175 ℃ at a stirring speed of 45r/min, and circularly grinding for 3 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding 66 parts of filler, continuously cooling and stirring at the stirring speed of 30r/min to 140 +/-10 ℃, and then performing a filling process.

Example 5

The difference between the hot-melt rubber asphalt waterproof coating provided by the comparative example and the hot-melt rubber asphalt waterproof coating provided by the example 4 is that the modifier SBS is replaced by star SBS YH4402 to be linear SBS YH1301-1.

Example 6

This comparative example provides a hot-melt rubber asphalt waterproofing paint which is different from example 2 in that the C5/C9 copolymerized petroleum resin is replaced with a C9 petroleum resin.

Example 7

The difference between the hot-melt rubber asphalt waterproof coating provided by the comparative example and the example 3 is that the grade of the functional auxiliary agent ethylene oxide homopolymer is changed from 8903 to 7886.

Example 8

This comparative example provides a hot-melt rubber asphalt waterproofing paint which is different from example 1 in that the base asphalt is replaced with AH-90 cycloalkyl asphalt.

Performance test

As the product has no corresponding national or industrial standard, the product is carried out according to the approval of the Hot melt rubber asphalt waterproof coating of the industrial standard, and the relevant performance test data of the examples 1 to 8 are shown in tables 1 and 2.

TABLE 1 test results of examples 1 to 4

TABLE 2 test results of comparative examples 5 to 8

From the above data, it can be seen that the examples and comparative examples designed by the applicant have excellent physical properties, and the properties completely meet or exceed the approval of the hot-melt rubber asphalt waterproof coating in the industry standard.

The above description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention. Any person skilled in the art may modify or equivalently change the embodiments described above using the teachings set forth. However, any simple modifications and equivalent changes of the above embodiments according to the technical essence of the present invention will fall within the protection scope of the technical solution of the present invention.

Claims (2)

1. A hot-melt rubber asphalt waterproof coating is characterized in that: the composition is characterized by comprising the following raw materials in parts by weight: 100-105 parts of petroleum asphalt, 8-12 parts of modifier, 2-4 parts of tackifier, 1.5-3 parts of functional additive, 14-20 parts of compatilizer and 66-80 parts of filler;

the petroleum asphalt adopts naphthenic base low-smoke asphalt AH-70, the modifier is a mixture of SBS and SBR, the tackifier is C5/C9 copolymerized petroleum resin, the compatilizer is a mixture of aromatic oil and naphthenic oil in any ratio, and the filler is talcum powder;

the functional auxiliary agent is polyolefin with a straight-chain saturated structure;

the polyolefin with a linear chain saturated structure adopts an ethylene oxide homopolymer, and the main technical parameters comprise: the softening point of the ring-ball method is 130 ℃, and the rotational viscosity at 150 ℃ is 4000-5000mPa.s;

the petroleum asphalt adopts naphthenic base low-smoke asphalt AH-70 produced by an atmospheric and vacuum distillation process, the ring and ball softening point of the petroleum asphalt is above 45 ℃, the penetration degree is 70dmm, the delay degree is more than 1500mm at 15 ℃, and the smoke volatilization volume is 2h at 180 ℃: the mass fraction is less than or equal to 0.5 percent;

the SBS is a mixture of a linear type and a star type, and the linear block ratio is S/B = 30/70-40/60; the weight-average molecular weight of SBS is 10-20 ten thousand, the melt mass flow rate under 10kg load at 230 deg.C is 0.05-0.8 g/10min;

the SBR is a linear solution polymerized random copolymer, and the technical parameters comprise: according to the mass fraction, the combined styrene content is 24-26%, the vinyl content is 17-18%, and the melt mass flow rate under the 10kg load at 230 ℃ is 0.1-0.6 g/10min.

2. The method for preparing the hot-melt rubber asphalt waterproof coating material as claimed in claim 1, which is characterized by comprising the following steps: the method comprises the following steps:

1) Uniformly mixing the modifier, the tackifier and the functional auxiliary agent, and preparing modified master batch by mixing a proper amount of heavy traffic asphalt with a mixing type extruder for later use;

2) Adding the heavy traffic asphalt and the compatilizer into a vertical batching tank, stirring and mixing at a stirring speed of 30-40 r/min, and heating to 150-160 ℃;

3) Adding the modified master batch prepared in the step 1) into the mixture obtained in the step 2), continuously heating to 165-175 ℃ at a stirring speed of 40-50 r/min, and circularly grinding for 2-3 times by using a colloid mill until the materials are melted and uniformly mixed;

4) And pumping the mixture obtained in the step 3 into a horizontal filling stirring tank by using modified asphalt, adding a filler, continuously cooling and stirring at a stirring speed of 20-30 r/min to 140 +/-10 ℃, and then performing a filling process.