Polyureas copolymer with main chain containing siloxane composition unit and preparation method thereof

A technology of structural units and copolymers, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of low surface energy of polyurea, unfavorable for industrial scale production, difficult to prepare and so on

Active Publication Date: 2014-06-04
HUBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent uses cycloalkylamino to prepare polysiloxane. Although this patent achieves the purpose of improving the low surface energy of polyurea, the cycloaminosilane compound used in practical applications is difficult to prepare, which is not conducive to industrial scale production
[0007] In summary, since the silane coupling agent is a low-molecular compound, introducing it into the polyurea system will easily lead to low-molecular alcohol produced by the silane coupling agent relying on the moisture in the air to hydrolyze and cross-link during the polyurea polymerization process, which will affect the performance of the polyurea resin. Cross-linking and curing; the introduction of too little silane coupling agent is difficult to reflect the excellent performance of silicone materials

Method used

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  • Polyureas copolymer with main chain containing siloxane composition unit and preparation method thereof
  • Polyureas copolymer with main chain containing siloxane composition unit and preparation method thereof
  • Polyureas copolymer with main chain containing siloxane composition unit and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] This example prepares polyurea copolymers containing siloxane structural units from prepolymer A and prepolymer B according to the molar ratio of 1.1:1, wherein the molar fraction of each component in prepolymer A and prepolymer B The mole fraction of each component in is as shown in table 1:

[0047] Table 1 Example 1 The molar fraction of each component of prepolymer A and each component of prepolymer B

[0048]

[0049]

[0050] The preparation method of the polyurea copolymer containing siloxane structural unit of the present embodiment, it may further comprise the steps:

[0051] 1) 60 molar parts of MDI and 20 molar parts of polytetrahydrofuran diol (M n =2000) into the reaction flask, react at room temperature for 4 hours at a stirring speed of 200-300rpm, and then add 15 molar parts of polytetrahydrofuran diol (M n =2000) and 5 mole fractions of polytetrahydrofuran trihydric alcohol were stirred for 30 minutes, and then heated to 70°C to react to the sto...

Embodiment 2

[0055] In this example, a polyurea copolymer containing siloxane structural units is prepared from prepolymer A and prepolymer B according to a molar ratio of 1.0:1, wherein the molar fraction of each component in prepolymer A and prepolymer B The molar fraction of each component in is as shown in table 2:

[0056] The molar fraction of each component of table 2 embodiment 2 prepolymer A and each component of prepolymer B

[0057]

[0058]

[0059] The preparation method of the polyurea copolymer containing siloxane structural unit of the present embodiment, it may further comprise the steps:

[0060] 1) Linear polysiloxane (M n =600) and 15 mole fractions of polytetrahydrofuran diol (M n =2000) into the reaction flask, react at room temperature for 3 hours at a stirring speed of 200-300rpm, and then add 15 molar parts of polytetrahydrofuran diol (M n =2000) and 5 mole fractions of polytetrahydrofuran trihydric alcohol were stirred for 30 minutes, and the temperature ...

Embodiment 3

[0064] This example prepares polyurea copolymers containing siloxane structural units from prepolymer A and prepolymer B according to the molar ratio of 1.1:1, wherein the molar fraction of each component in prepolymer A and prepolymer B The molar fraction of each component in is as shown in table 3:

[0065] The mole fraction of each component and each component of prepolymer B in the embodiment 3 prepolymer A of table 3

[0066]

[0067]

[0068] The preparation method of the polyurea copolymer containing siloxane structural unit of the present embodiment, it may further comprise the steps:

[0069] 1) Polymethylmethoxysiloxane (M n =600) and 15 mole fractions of polytetrahydrofuran diol (M n=2000) into the reaction flask, react at room temperature for 5 hours at a stirring speed of 200-300rpm, and then add 10 molar parts of polytetrahydrofuran diol (M n =2000) and 5 mole fractions of polytetrahydrofuran trihydric alcohol were stirred for 30 minutes, and the tempera...

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Abstract

The invention discloses a polyureas copolymer with a main chain containing siloxane composition units; the polyureas copolymer comprises the following constitution units: polysiloxanes constitutional units of aminoalkyl termination; polyether constitutional units of high-molecular amino termination; polyether alcohol or polyester alcohol constitutional units; single molecule chain extension double amine or low molecular amino termination polyether constitutional units; isocyanate constitutional units. Through the design of polysiloxanes molecular composition of aminoalkyl termination and adjustment of molecule mass; on one hand, a reaction amino group and an alkyloxy crosslinking group are introduced on a terminal group; on the other hand, a chain alkyl group or a perfluoro alkyl group are designed on a side chain; simultaneously three function hydroxy or amino groups are embedded in the composition, thereby obtaining excellent anti adhesiveness, abrasion resistance, corrosion resisting, impact resistance and anti contamination functions, effectively preventing contamination objects from pasting on special equipment, improving anti pollution function, solving adherence of adherence fluid, anti pollution and wearing corrosion problems, satisfying demands of different application fields, and prolonging service life of the special equipment.

Description

technical field [0001] The invention relates to a polyurea coating material, in particular to a main chain silicon-containing material with high wear resistance, high anti-pollution and low surface performance, which is widely used in the fields of special mechanical equipment for field operations, military equipment, nuclear power equipment, and wind power industry equipment. Oxyalkylene structural unit polyurea copolymer and its preparation method. Background technique [0002] With the continuous development of modern science and technology and the increasing social life of human beings, the requirements for high performance of special equipment special environmental protection coating materials have become more and more stringent. For example, coating materials used on the surface of special mechanical equipment, military equipment, nuclear power equipment, wind power industry equipment and municipal engineering equipment for field operations not only require good adhesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G18/76C08G18/75C08G18/48C08G18/50C08G18/32C08G18/61C08G18/42C09D175/02
Inventor 张群朝李国荣蒋涛谢亦富杨金鑫王秋娣廖有为
Owner HUBEI UNIV
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