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Single-component exposed acrylic acid modified polyurethane waterproof paint and preparation method

A polyurethane waterproof and acrylate technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as pinholes, cracking, construction performance, and low strength, and prevent excessive molecular weight, dense and seamless coatings, The effect of good water resistance

Active Publication Date: 2017-05-10
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional one-component polyurethane waterproof coating uses aromatic isocyanate, and the curing mechanism is that the prepolymer containing -NCO end groups reacts with the base layer or moisture in the air to form a film, and releases CO 2 Therefore, the traditional one-component polyurethane waterproof coating is easily disturbed by the humidity of the construction environment during the construction process, and the construction cannot be thickly coated, and the cured coating film is prone to non-compactness, air bubbles and pinholes.
In addition, the traditional one-component polyurethane has low strength. If it is applied to the exposed type, it can not guarantee the weather resistance, and it is easy to be affected by external forces and cause cracking, which will affect the construction performance.
[0004] In summary, acrylic waterproof coatings have excellent weather resistance, but poor physical properties and low-temperature flexibility, while polyurethane coatings have good physical properties and low-temperature flexibility, but poor weather resistance
If the combination of the two is simply adopted, and the acrylic resin is added to the polyurethane prepolymer, the acrylic resin will be precipitated, and the effect of complementary advantages of the two cannot be achieved.

Method used

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  • Single-component exposed acrylic acid modified polyurethane waterproof paint and preparation method
  • Single-component exposed acrylic acid modified polyurethane waterproof paint and preparation method
  • Single-component exposed acrylic acid modified polyurethane waterproof paint and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Raw material ratio of modified polyurethane waterproof coating:

[0023]

[0024] 2. Process of modified polyurethane waterproof coating:

[0025] (1) Add 20 parts by weight of polyether diol 2000D, 14 parts by weight of polyether trihydric alcohol 330N, 10 parts by weight of chlorinated paraffin and 30 parts by weight of heavy calcium, 0.3 parts by weight of titanium dioxide, and 0.2 parts by weight of iron red in the reaction vessel. parts, respectively, stirred and heated to 100°C-120°C, and dehydrated for 2-3 hours under the condition of vacuum of -0.01MPa;

[0026] (2) Lower the temperature to 60°C to 80°C, add 6.5 parts by weight of isocyanate IPDI, and react for 1 to 2 hours under stirring at 80°C;

[0027] (3) Cool down to 60°C, add 2.5 parts by weight of hydroxyethyl acrylate, heat up to 70°C and react for 2 to 3 hours; then maintain the temperature at 70°C, add 0.2 parts by weight of initiator azobisisobutyronitrile (AIBN) , 0.2 parts by weight of chai...

Embodiment 2

[0031] 1. Raw material ratio of modified polyurethane waterproof coating:

[0032]

[0033]

[0034] 2. Process of modified polyurethane waterproof coating:

[0035] (1) Add 25 parts by weight of polyether diol 2000D, 15 parts by weight of polyether trihydric alcohol 330N, 9 parts by weight of chlorinated paraffin and 24 parts by weight of barium sulfate, 0.4 parts by weight of titanium dioxide, and phthalocyanine blue 0.2 weight, stir separately and heat up to 100 ℃ ~ 120 ℃, dehydration under the condition of -0.01MPa vacuum for 2 ~ 3 hours;

[0036] (2) Lower the temperature to 60°C to 80°C, add 6 parts by weight of isocyanate HDI, and react for 1 to 2 hours under stirring at 80°C;

[0037] (3) Cool down to 60°C, add 2 parts by weight of hydroxyethyl methacrylate, raise the temperature to 70°C for 2-3 hours; then maintain the temperature at 70°C, add 0.2 Parts by weight, chain transfer agent aliphatic mercaptan 0.2 parts by weight, then dropwise add methyl methacrylate...

Embodiment 3

[0041] 1. Raw material ratio of modified polyurethane waterproof coating:

[0042]

[0043]

[0044] 2. Process of modified polyurethane waterproof coating:

[0045] (1) Add 10 parts by weight of polyether diol 2000D, 26 parts by weight of polyether trihydric alcohol 330N, 8 parts by weight of chlorinated paraffin and 21 parts by weight of calcium carbonate, 10 parts by weight of talcum powder, 0.5 parts by weight of titanium dioxide in the reaction vessel Parts by weight, 0.2 parts by weight of bright yellow, respectively stirred and heated to 100°C-120°C, and dehydrated for 2-3 hours under the condition of a vacuum of -0.01MPa;

[0046] (2) Lower the temperature to 60°C-80°C, add 6 parts by weight of isocyanate IPDI, and react for 1 to 2 hours under stirring at 80°C;

[0047] (3) Cool down to 60°C, add 2 parts by weight of hydroxyethyl acrylate, heat up to 70°C and react for 2-3 hours; then maintain the temperature at 70°C, add 0.2 parts by weight of initiator azobisi...

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Abstract

The invention provides single-component exposed acrylic acid modified polyurethane waterproof paint and a preparation method. The modified polyurethane waterproof paint is prepared from the following raw materials in parts by weight: 5 to 20 parts of isocyanate, 20 to 40 parts of hydroxyl terminated polyether, 2 to 10 parts of acrylate, 0.2 to 5 parts of a latent curing agent, 5 to 15 parts of a plasticizer, 5 to 20 parts of a solvent, 10 to 40 parts of pigment filling, 0.2 to 1 part of a catalyst, 0.1 to 1 part of a chain transferring agent, 0.2 to 1 part of an initiator and 0.1 to 1 part of a high-temperature auxiliary agent. The invention further provides the preparation method of the single-component exposed acrylic acid modified polyurethane waterproof paint. The single-component exposed acrylic acid modified polyurethane waterproof paint provided by the invention has the advantages of high strength, dense thin film and reliability of construction; the polyurethane waterproof paint has good weather resistance; the single-component polyurethane waterproof paint has a good waterproof performance, also has excellent weather resistance and high brightness and is suitable for construction of exposed base planes.

Description

technical field [0001] The invention relates to a modified polyurethane waterproof coating and a preparation method, in particular to a one-component exposed acrylic modified polyurethane waterproof coating and a preparation method. Background technique [0002] Polyurethane waterproof coating is a chemical reaction type waterproof coating. After curing, it is a rubber-like high-elastic coating film. The coating film is seamless as a whole. Because of its excellent comprehensive performance, it is called "liquid coil" by the industry. widely used within. After more than 20 years of development, my country's polyurethane waterproof coatings have a wide range of products and excellent performance, occupying an important position in the construction waterproof industry. However, most of the polyurethane products on the market are aromatic polyurethanes, that is, the isocyanate monomers used are aromatic isocyanates. Aromatic polyurethanes cannot be used for exposed constructi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C08G18/48C08G18/67C08G18/75C08G18/73C08G18/66C08K3/22C08K3/26C08K3/30
CPCC08G18/4812C08G18/6666C08G18/672C08G18/73C08G18/755C08K3/22C08K3/26C08K3/30C08K2003/2241C08K2003/2272C08K2003/265C08K2003/3045C09D7/61C09D175/14
Inventor 孙建李红英韩海军焦明明
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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