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Photocuring double-component polyurea waterproof coating and preparation method thereof

A waterproof coating, two-component technology, used in polyurea/polyurethane coatings, coatings, etc., can solve problems such as low construction efficiency, dependence on ambient temperature, and strength requiring time

Active Publication Date: 2021-05-11
JIANGSU CANLON BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still problems that curing crosslinking needs to depend on ambient temperature, deep curing takes time to increase strength, and construction efficiency is not high.

Method used

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  • Photocuring double-component polyurea waterproof coating and preparation method thereof
  • Photocuring double-component polyurea waterproof coating and preparation method thereof
  • Photocuring double-component polyurea waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The light-cured two-component polyurea waterproof coating provided in this embodiment, its raw material formula is shown in Table 1, wherein,

[0046] The sterically hindered secondary amine has the following structural formula, and JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1 for short:

[0047]

[0048] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respectively CH 2 CH 3 .

[0049] The isocyanate is MDI-MIPS.

[0050] The amino-terminated polyether is Huntsman SD2001.

[0051] The amine chain extender has the following structural formula, specifically JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1:

[0052]

[0053] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respectively CH 2 CH 3 .

[0054] The photoinitiator is JRCURE-1110.

[0055] The defoamer is polysiloxane defoamer 8110.

[0056] The antioxidant is 2,6-tertiary butyl-4-methylphenol.

[0057] ...

Embodiment 2

[0070] The light-curing two-component polyurea waterproof coating provided in this example differs from Example 1 in that in component A, the mass ratio of polyurea prepolymer and acrylic modified polyurea prepolymer is different.

[0071] In this example, the raw material formulations of components A and B are shown in Table 1. Among them, the hindered secondary amine has the following structural formula, and JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1, is selected specifically:

[0072]

[0073] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respectively CH 2 CH 3 .

[0074] The isocyanate is MDI-MIPS.

[0075] The amino-terminated polyether is Huntsman SD2001.

[0076] The amine chain extender has the following structural formula, specifically JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1:

[0077]

[0078] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respective...

Embodiment 3

[0095] The light-curing two-component polyurea waterproof coating provided in this example is different from Example 1 in that in component A, the mass ratio of polyurea prepolymer and acrylic modified polyurea prepolymer is different.

[0096] In this example, the raw material formulations of A and B components are shown in Table 1, wherein,

[0097] The sterically hindered secondary amine has the following structural formula, and JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1 for short:

[0098]

[0099] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respectively CH 2 CH 3 .

[0100] The isocyanate is MDI-MIPS.

[0101] The amino-terminated polyether is Huntsman SD2001.

[0102] The amine chain extender has the following structure, specifically JH334 from Junhe Chemical (Shanghai) Co., Ltd., referred to as amine chain extender No. 1:

[0103]

[0104] In formula I, X is CH 2 , R 1 , R 2 , R 3 , R 4 Respectively...

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Abstract

The invention relates to a photocuring double-component polyurea waterproof coating and a preparation method thereof. The photocuring double-component polyurea waterproof coating is composed of a component A and a component B. The raw material formula of the component A comprises a polyurea prepolymer and an acrylic acid modified polyurea prepolymer, and the polyurea prepolymer is prepared through a reaction of isocyanate and steric hindrance secondary amine. The raw material formula of the component B comprises amino-terminated polyether, an amine chain extender, a photoinitiator, a defoaming agent, an antioxidant and a plasticizer. The steric hindrance secondary amine and the amine chain extender are respectively selected from asparaginic acid ester steric hindrance type secondary amine. An asparaginic acid ester compound is introduced into the component A and the component B at the same time, the photoinitiator is used in cooperation, the coating can be rapidly and deeply dried and cured to form a film after being irradiated by ultraviolet rays, and the weather resistance is good. Acrylic acid is introduced for modification, so that the coating has the flexibility of polyurethane and the hardness of acrylic acid at the same time, and the coating also has excellent cohesiveness, excellent self-repairing and self-healing performance and long opening time.

Description

technical field [0001] The invention belongs to the field of waterproof coatings, in particular to a light-curing two-component polyurea waterproof coating and a preparation method thereof. Background technique [0002] Polyurea coating is a kind of reactive, non-polluting high-performance coating developed this year at home and abroad. In recent years, a polyaspartic ester polyurea coating has been developed, and polyaspartic acid ester is introduced into the polyurea coating, so that the polyaspartic acid ester polyurea coating has excellent weather resistance, good leveling, etc. advantage. [0003] For example, Chinese patent CN111793420A discloses a modified polyaspartate polyurea coating and its preparation method. The polyurea coating is composed of A component and B component, wherein, in parts by weight, A component consists of It is a polymer of isocyanate and / or isocyanate; the material composition of component B is 20-75 parts of silicone and epoxy double-modif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C08G18/66C08G18/50C08G18/62C08G18/32C08G18/10C08G18/12
CPCC09D175/02C08G18/6685C08G18/4063C08G18/5024C08G18/6216C08G18/325C08G18/10C08G18/12
Inventor 贺小钢朱洋洋高凡李忠人谭宇昂周围
Owner JIANGSU CANLON BUILDING MATERIALS
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