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A kind of branch point fracture type hyperbranched resin and its preparation method and application

A technology of hyperbranched resin and branch point, which can be applied to biocide-containing paints, coatings, anti-fouling/underwater coatings, etc., and can solve the problem that the resin cannot be detached from the coating surface

Active Publication Date: 2020-11-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the implementation of the above technologies is based on the traditional linear polymer resin, which still cannot make the hydrolyzed resin detach from the coating surface in time to achieve controllable self-polishing, which is satisfactory for static anti-corrosion in areas with high fouling pressure. Pollution demand

Method used

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  • A kind of branch point fracture type hyperbranched resin and its preparation method and application
  • A kind of branch point fracture type hyperbranched resin and its preparation method and application
  • A kind of branch point fracture type hyperbranched resin and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Under stirring conditions, add 50g of xylene and 35g of propylene glycol methyl ether to the reaction vessel, raise the temperature to 90°C under a nitrogen atmosphere, and dropwise add 50g of bis(trimethylsiloxane)methyl methacrylate in 6 hours. Silicone ester (purchased from Momentive, USA), 20g ethyl acrylate, 30g polyglycolide with a molecular weight of 500g / mol at both ends of the vinyl group, 5g azobisisobutyronitrile, 2g diisopropyl disulfide The mixture of xanthate and 10g dimethylbenzene forms, after dropwise addition, continue to dropwise add the mixture of 0.5g di-tert-butyl peroxide and 10g dimethylbenzene in 30 minutes, then stir for 1.5 hours again, obtain hyperbranched silicon base Self-polishing resin.

[0074] The number average molecular weight Mn of the hyperbranched silicon-based self-polishing resin in the present embodiment is 4.5×10 3 g / mol, the silicon content is 4.6%, and the acid value is 92mgKOH / g; its paint film adhesion is grade 2; the drag...

Embodiment 2

[0076] Under the condition of stirring, add 20g of xylene and 70g of methyl isobutyl ketone into the reaction vessel, raise the temperature to 95°C under nitrogen atmosphere, and dropwise add 70g of tri-n-butylsilyl methacrylate (purchased In Bailingwei Technology Co., Ltd.), 30g magnesium acrylate, 2g azobisisovaleronitrile, 5g S-(thiobenzoyl) thioacetic acid, and 10g methyl isobutyl ketone. After the dropwise addition, keep warm for 3 hours , and then dropwise added 1 g of azobisisobutyronitrile and 10 g of xylene at a constant speed within 30 minutes, and stirred for another 4 hours to obtain a hyperbranched silicon-based self-polishing resin.

[0077] The number average molecular weight Mn of the hyperbranched silicon-based self-polishing resin in the present embodiment is 4.5×10 3 g / mol, the silicon content is 6.9%, and the acid value is 138mgKOH / g; its paint film adhesion is grade 1; the drag reduction rate is 4.8%; it is compounded with 10wt% 5-octyl-2-furanone to prepa...

Embodiment 3

[0079] (1) Synthesis of vinyl zinc ester monomer:

[0080] Add 10.4g of zinc oxide, 20g of propylene glycol methyl ether and 7g of xylene to the reaction vessel, heat to 75°C, dropwise add a mixture of 9.3g of acrylic acid, 7.7g of acetic acid and 1g of deionized water at a constant rate, and control it within 3 hours After the dropwise addition, after the dropwise addition, the insulation reaction was carried out for 2 hours, and the solvent was removed by rotary evaporation to obtain the vinyl zinc ester monomer;

[0081] (2) Synthesis of hyperbranched zinc-based self-polishing resin:

[0082] Under the condition of stirring, add 50g of xylene and 35g of propylene glycol methyl ether into the reaction vessel, raise the temperature to 90°C under a nitrogen atmosphere, and add 25g of vinyl zinc ester monomer, 30g of methacrylic acid-2 - Methoxyethyl ester, 15g methyl methacrylate, 30g polycaprolactone with a molecular weight of 500g / mol and vinyl groups at both ends, 5g azobi...

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Abstract

The invention discloses a branch point rupture type hyperbranched resin, a method and an application thereof. The branch point rupture type hyperbranched resin is mainly prepared from the following components in parts by weight: 0-70 parts of vinyl anti-fouling functional monomer, 1-60 parts of difunctional monomer, vinyl mono- 0-90 parts of body, 1-20 parts of initiator, 0.5-10 parts of chain transfer agent, 50-150 parts of organic solvent. The branch point of the resin can be broken under the attack of seawater, and after breaking, small molecular fragments that are easily absorbed by the environment can be formed, which can effectively avoid marine microplastic pollution. At the same time, the side chain silane ester bond / zinc ester bond / copper ester bond / betaine-type zwitterion precursor can also be hydrolyzed in seawater, and the synergy between the two and the branch point breaking can further accelerate the hydrolysis rate of the material and achieve fast Polishing, so as to solve the dependence of traditional self-polishing materials on the speed of the ship, and meet the static antifouling needs of large areas with fouling pressure.

Description

technical field [0001] The invention belongs to the technical field of marine antifouling materials, and in particular relates to a branch point fracture type hyperbranched resin and a preparation method and application thereof. Background technique [0002] The problem of marine biofouling will cause huge economic losses and potential safety hazards. Therefore, marine antifouling is a subject closely related to the major needs of the environment, energy, and national defense, and is of great significance. At present, the application of marine antifouling coatings is the most economical, convenient and common method to solve the problem of marine biofouling. The mainstream self-polishing resin technology is represented by polysilyl acrylate, zinc polyacrylate and copper polyacrylate resins, all of which are side chain hydrolyzed, and their performance has certain requirements on the stopping ratio and speed. In the static stage, it is difficult to achieve the ideal self-pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/01C08F230/08C08F230/04C08F220/18C08F220/06C08F220/14C08F220/34C08F220/20C08F2/38C09D151/08C09D143/04C09D143/00C09D133/14C09D5/16
CPCC08F283/01C08F2/38C08F230/08C08F230/04C08F220/18C08F220/14C08F220/20C08F220/34C09D151/08C09D143/04C09D143/00C09D133/14C09D5/1662C08F220/06C08F222/385
Inventor 张广照马春风潘健森谢庆宜
Owner SOUTH CHINA UNIV OF TECH
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