A two-component room temperature non-curing asphalt polyurethane waterproof coating and its preparation method

A technology of asphalt waterproof coating and two-component polyurethane, which is applied in the direction of polyurea/polyurethane coating, asphalt coating, coating, etc., can solve the problem of damage to the physical and mechanical properties of coatings, uneven crosslinking degree of coatings, and reduce the performance of waterproof coatings, etc. problems, to achieve stable and excellent physical and mechanical properties, fast curing speed, thorough and uniform crosslinking

Active Publication Date: 2021-02-02
JIANGSU CANLON BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, although this patent achieves a better non-curing effect, in order to solve the poor compatibility between polyurethane prepolymer and petroleum asphalt, a specific compatibilizer is added, but these compatibilizers will gradually segregate over time The problems that come out, and then cause the polyurethane prepolymer and petroleum asphalt to delaminate each other, destroy the physical and mechanical properties of the coating, on the one hand reduce the storage stability, even if it has been applied to the wall waterproof, the gradually segregated compatibilizer will still reduce The performance of waterproof coating, on the other hand, this waterproof coating is a single component, which requires latent curing agent to react in the presence of water to produce amine or alcohol amine and then react with isocyanate group to cure, but after it is applied to the wall waterproof, It takes a long time for it to absorb moisture in the air or concrete to cross-link, which not only delays the construction period, but also has uneven cross-linking degree and insufficient cross-linking in the coating.

Method used

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  • A two-component room temperature non-curing asphalt polyurethane waterproof coating and its preparation method
  • A two-component room temperature non-curing asphalt polyurethane waterproof coating and its preparation method
  • A two-component room temperature non-curing asphalt polyurethane waterproof coating and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example provides a two-component room temperature non-curing asphalt polyurethane waterproof coating, including A component and B component. The mass ratio of A component to B component is 1:5; the raw material of A component includes 100kg Dongda Polyether diol 2000, 30kg Dongda polyether triol 3050, 50kg BASF TDI80, 20kg functionality is 2 and number average molecular weight is 2800 hydroxyl-terminated polybutadiene (purchased from Evonik); B group Including 300kg of No. 70 petroleum asphalt, 100kg of talcum powder 1250 mesh, 200kg of DINP plasticizer produced by China Taiwan Liancheng, 130kg of hydroxyl-terminated polybutadiene with a functionality of 2 and a number average molecular weight of 2800 (purchased from Evonik Co., Ltd. ), Xiangyuan Chemical's curing agent MOCA 20kg, asphalt modifier polyethylene wax SLT 3kg, high temperature additive meteorological silica 2kg, zinc isooctanoate 10kg, defoamer 6800 2kg;

[0040] Its preparation method specifically inc...

Embodiment 2

[0046] This example provides a two-component room temperature non-curing asphalt polyurethane waterproof coating, including A component and B component. The mass ratio of A component to B component is 1:5; the raw material of A component includes 110kg Dongda Polyether diol 2000, 80kg BASF MDI, 10kg functionality is 2.2 and number average molecular weight is 3000 hydroxyl-terminated polybutadiene (purchased from Evonik); B component includes No. 70 petroleum asphalt 200kg, titanium dioxide 10kg, heavy calcium 1500 mesh 80kg, 100kg DINP plasticizer produced by China Taiwan Liancheng, 60kg functionality is 2.4 and number average molecular weight is 3000 hydroxyl-terminated polybutadiene (purchased from Evonik Company), Xiangyuan Chemical Co., Ltd. Curing agent ML200 40kg, asphalt modifier polyacetamide wax powder 5kg, high temperature additive nano-calcium 3kg, dibutyltin dilaurate 1kg, defoamer BYK066N 1kg.

[0047] Its preparation method is as follows:

[0048] Preparation of...

Embodiment 3

[0054] This example provides a two-component room temperature non-curing asphalt polyurethane waterproof coating, including A component and B component. The mass ratio of A component to B component is 1:5; the raw material of A component includes 20kg Dongda Polyether diol 2000, polyether triol 330N100kg, 40kg BASF HMDI, 20kgHDI and 10kg hydroxyl-terminated polybutadiene (purchased from Evonik) with a functionality of 2.4 and a number average molecular weight of 2900; B component Including No. 200 petroleum asphalt 200kg, talcum powder 1250 order 100kg, heavy calcium 1500 order 20kg, 150kg China Taiwan Liancheng produced DINP plasticizer, 60kg functionality is 2.4 and the number average molecular weight is 2900 hydroxyl-terminated polybutadiene ( Purchased from Evonik), 40kg of curing agent ML200 from Xiangyuan Chemical, 1kg of asphalt modifier polyacetamide wax powder, 2kg of polyethylene wax, 1kg of high-temperature additive gypsum whisker, 3kg of nano calcium carbonate, cata...

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Abstract

The invention discloses a two-component polyurethane asphalt waterproof coating and a preparation method thereof. Modified polyurethane prepolymer, polyurethane prepolymer is made by reacting polyol and polyisocyanate; B component contains petroleum asphalt, second hydroxyl terminal polybutadiene, secondary amine curing agent and / or primary amine curing agent; 1. The second hydroxyl-terminated polybutadiene is independently selected from one or more combinations of the compounds described in formula (I), and among the structural monomers in the formula, the monomer represented by a accounts for 10-30% , b accounts for 50-70%, and c accounts for 10-30%; preparation method: prepare components A and B separately and mix them; the present invention can not only realize the effect of non-curing at room temperature, but also has good coating stability and can always maintain Good dispersion uniformity ensures stable physical and mechanical properties of the coating.

Description

technical field [0001] The invention belongs to the field of building waterproofing, in particular to a two-component room temperature non-curing asphalt polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Waterproof coating The waterproof film formed by the coating on the base layer after curing has certain strength, good extensibility, crack resistance, impermeability and weather resistance, and has good temperature adaptability, easy operation and easy maintenance. and maintenance. Compared with the waterproof membrane, the waterproof coating has strong adaptability to the base layer, and the waterproof layer has no seams, which is more reliable. Due to the above characteristics, waterproof coating is one of the main waterproof materials often used in waterproofing projects. [0003] Currently used waterproof coatings are generally emulsions or contain solvents, but solvents are gradually abandoned due to the need for environm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D195/00C09D7/65C08G18/69C08G18/66C08G18/48C08G18/12C08G18/10
CPCC09D175/14C09D7/65C08G18/69C08G18/12C08G18/4812C08G18/4829C08G18/10C08G18/4825C08L2205/03C08L2205/035C08L95/00
Inventor 贺小钢李忠人赵祖兵徐加康李俊
Owner JIANGSU CANLON BUILDING MATERIALS
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