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Three-layer core-shell structure interpenetrating network emulsion having high adhesion force to metal substrate and synthesis method of emulsion

A core-shell structure, interpenetrating network technology, applied in the coating and other directions, can solve the problems of unreported damping performance, and achieve the effects of good film-forming performance, wide effective damping temperature range, and high damping factor

Inactive Publication Date: 2015-05-06
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on an excellent emulsion with these properties at the same time.
For example, patent CN 100560626 discloses a self-crosslinking interpenetrating network polymer antirust emulsion and its preparation method, which solves the problems of weather resistance, water resistance and salt spray resistance of the existing antirust emulsion, but does not Not reported to have good damping properties
Another example is disclosed in the patent CN 102731731 B a kind of preparation method of hyperbranched polyurethane / polyacrylate damping material, the water-based polyurethane prepolymer of partial termination is synthesized by traditional method first; React with isocyanate groups, graft to water-based polyurethane prepolymer to obtain hyperbranched water-based polyurethane prepolymer; then add triethylamine and some vinyl monomers for ionization, and add water to disperse under high-speed stirring to obtain polyurethane / Vinyl monomer dispersion; finally, raise the temperature of the above dispersion to 65-80 °C, start to add the remaining vinyl monomer, initiator and crosslinking agent dropwise, continue to keep warm for 2-6 hours, and cool down to obtain hyperbranched polyurethane / polymer Acrylate emulsion, the material after the coating film is cured has relatively good damping performance and heat resistance performance, but there is no report that it has excellent antirust performance

Method used

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  • Three-layer core-shell structure interpenetrating network emulsion having high adhesion force to metal substrate and synthesis method of emulsion
  • Three-layer core-shell structure interpenetrating network emulsion having high adhesion force to metal substrate and synthesis method of emulsion
  • Three-layer core-shell structure interpenetrating network emulsion having high adhesion force to metal substrate and synthesis method of emulsion

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: each raw material constitutes as follows by mass parts:

[0021]

[0022] The preparation steps of the three-layer core-shell structure interpenetrating network emulsion of embodiment 1 are as follows:

[0023] (1) Preparation of nuclear pre-emulsion

[0024] According to the above formula, slowly add the core mixed monomer and cross-linking monomer ethylene glycol dimethacrylate (EGDMA) into a container with a certain amount of emulsifier, water and initiator, and stir at a high speed of 900 rpm Pre-emulsification was performed for 30 minutes to prepare a nuclear pre-emulsion.

[0025] Take 15% pre-emulsion from the nuclear pre-emulsion as the seed pre-emulsion.

[0026] (2) Preparation of seed emulsion

[0027] Add 15% nuclear pre-emulsion to a reaction kettle equipped with part of emulsifier and deionized water and protected by inert gas, heat to 82°C to initiate polymerization, and keep warm for half an hour after the blue light appears to prepar...

Embodiment 2

[0037] Embodiment 2: each raw material constitutes as follows by mass parts:

[0038]

[0039] Example 2 Synthesis steps are the same as Example 1.

[0040]The detection of adhesion is carried out according to the national standard "Cross-cut test of paint and varnish film" GB / T 9286-1998, and the damping performance is analyzed by dynamic thermomechanical, and the film-forming performance is analyzed by atomic force microscope. The result is: latex film The adhesion reaches level 1, the damping peak can reach 1.12, the effective damping temperature range (tanσ>0.3) between -40 and 80 °C is about 87 °C, and it has good film-forming properties.

Embodiment 3

[0041] Embodiment 3: each raw material constitutes as follows by mass parts:

[0042]

[0043] Embodiment 3 synthesis steps are the same as embodiment 1.

[0044] The detection of adhesion is carried out according to the national standard "Cross-cut test of paint and varnish film" GB / T 9286-1998, and the damping performance is analyzed by dynamic thermomechanical, and the film-forming performance is analyzed by atomic force microscope. The result is: latex film The adhesion reaches level 1, the damping peak can reach 0.75, the effective damping temperature range (tanσ>0.3) between -40 and 80 °C is about 60 °C, and it has good film-forming properties.

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Abstract

The invention relates to a three-layer core-shell structure interpenetrating network emulsion having high adhesion force to metal substrate and a synthesis method of the emulsion. The content of a solid in the three-layer core-shell structure interpenetrating network emulsion is 30-45%; the core of the three-layer core-shell structure interpenetrating network polymer is prepared by polymerizing a core layer monomer and a cross-linking monomer in the presence of an initiator; an interlayer of the three-layer core-shell structure interpenetrating network polymer is prepared by polymerizing an interlayer monomer and a cross-linking monomer in the presence of an initiator; and the outer layer shell of the three-layer core-shell structure interpenetrating network polymer is prepared by polymerizing an outer layer shell monomer and phosphate ester monomer in the presence of an initiator. The emulsion has the advantages of good adhesion force to the metal substrate, wide effective damping temperature range (tan sigma is greater than 0.3), high damping factor of which the maximum value reaches 1.2 and good film-forming property.

Description

technical field [0001] The invention relates to a three-layer core-shell structure interpenetrating network emulsion with high adhesion to metal substrates and a synthesis method thereof. Background technique [0002] Interpenetrating network (IPN) polymers are a class of polymer materials with good comprehensive properties developed in recent years. It is formed by the cross-linked network of cross-linked polymer A and cross-linked polymer B, which is continuously interpenetrated with each other, and has a special spatial topology, in which at least one polymer is network-like, and other polymers Can exist in linear form. Due to the cross-penetration and mechanical entanglement between the polymer networks, it plays the role of forced mutual compatibility and synergistic effect, which provides an effective method for improving the performance of polymers. Due to the two effects of thermodynamic incompatibility and forced compatibility of physical entanglement, a microphas...

Claims

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Application Information

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IPC IPC(8): C08F220/14C08F220/18C08F222/14C08F230/02C08F2/30C08F2/24C09D133/12
Inventor 俞成丙陈赛赛杨丹伍芳芳胡季华林明玲朱文婷
Owner SHANGHAI UNIV
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