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Polyacrylate pressure-sensitive adhesive and preparation method thereof

A polyacrylate and pressure-sensitive adhesive technology, applied in the field of pressure-sensitive adhesives, can solve the problems of difficulty in air permeability, molecular chain entanglement, and difficulty in waterproofing, and achieve the effects of excellent air permeability and waterproof performance, simple preparation process and excellent waterproof performance.

Active Publication Date: 2020-06-23
HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the large molecular weight of water-based acrylate, the serious entanglement of molecular chains, and the very weak movement ability of molecular chains, when used as medical adhesives, its disadvantages of being difficult to breathe and waterproof hinder its advancement to higher-end applications.

Method used

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  • Polyacrylate pressure-sensitive adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weigh 35g of deionized water and 1g of emulsifier SC-09 into the pre-emulsification kettle, turn on the stirring device, add 0.02g of hyperbranched polysilane, 99.98g of methyl methacrylate, and stir for 30 minutes. Add 50g of deionized water and 1g of emulsifier SC-09 into the reaction kettle, turn on the condensation reflux device, stir and raise the temperature to 80°C, dissolve 0.8g of initiator ammonium persulfate in 20g of water, add it to the reaction kettle at one time, and raise the temperature to 83 ℃, add 17g of core structure pre-emulsion, and react for 30 minutes. Dissolve 1 g of the initiator ammonium persulfate in 45 g of water, drop it into the reaction kettle simultaneously with the remaining core structure pre-emulsion, drop it for 3 hours, and keep it warm for 30 minutes.

[0030] Weigh 60g isooctyl acrylate, 40g butyl acrylate, weigh 1g emulsifier SC-09 and mix with isooctyl acrylate and butyl acrylate; weigh 1g initiator ammonium persulfate and diss...

Embodiment 2

[0033] Weigh 33g of deionized water and 1g of emulsifier SC-09 into the pre-emulsification tank, turn on the stirring device, add 0.06g of hyperbranched polysilane, 99.94g of methyl methacrylate, and stir for 30 minutes. Add 50g of deionized water and 1g of emulsifier SC-09 into the reaction kettle, turn on the condensation reflux device, stir and raise the temperature to 80°C, dissolve 0.8g of initiator ammonium persulfate in 20g of water, add it to the reaction kettle at one time, and raise the temperature to 83 ℃. Dissolve 1 g of the initiator ammonium persulfate in 47 g of water, drop it into the reaction kettle simultaneously with the core structure pre-emulsion, drop it for 3 hours, and keep it warm for 30 minutes.

[0034] Weigh 50g isooctyl acrylate, 50g butyl acrylate, weigh 1g emulsifier SC-09 and mix with isooctyl acrylate and butyl acrylate; weigh 1g initiator ammonium persulfate and dissolve in 50g water; weigh the above The substance was added dropwise in the re...

Embodiment 3

[0037] Weigh 38g of deionized water and 1g of emulsifier CO-436 into the pre-emulsification tank, turn on the stirring device, add 0.1g of hyperbranched polysilane, 99.9g of styrene, and stir for 30 minutes. Add 40g of deionized water and 1g of emulsifier CO-436 into the reaction kettle, turn on the condensation reflux device, stir and raise the temperature to 80°C, dissolve 0.8g of initiator ammonium persulfate in 12g of water, add it to the reaction kettle at one time, and raise the temperature to 82 ℃, add 20 g of core structure pre-emulsion, and react for 30 minutes. Dissolve 1 g of the initiator ammonium persulfate in 55 g of water, drop it into the reaction kettle simultaneously with the remaining core structure pre-emulsion, drop it for 3 hours, and keep it warm for 30 minutes.

[0038] Weigh 60g isooctyl acrylate, 40g butyl acrylate, weigh 1g emulsifier CO-436 and mix with isooctyl acrylate and butyl acrylate; weigh 1g initiator ammonium persulfate and dissolve in 55g ...

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Abstract

The invention discloses a polyacrylate pressure-sensitive adhesive which has a core-shell double-layer structure formed by a hyperbranched polysilane core and a polyacrylate shell, and a preparation method of the polyacrylate pressure-sensitive adhesive; and the weight percentage of the core-shell double-layer structure is (0.01 to 5 percent) : (95 to 99.99 percent). According to the polyacrylate pressure-sensitive adhesive, hyperbranched polysilane is taken as a core, and a special spacial three-dimensional network tree structure of the core, lager molecular chain intervals and a cavity structure among molecular chains supply superexcellent air permeability for the pressure-sensitive adhesive; and an acrylate molecular chain segment in a pressure-sensitive adhesive shell structure supplies the adhesion, and a silicon-containing molecular chain segment in a core structure supplies the waterproofness. The polyacrylate pressure-sensitive adhesive is low in cost, excellent in air permeability and waterproofness, is environment-friendly, does not have side and toxic effects, and can be widely used as a medical adhesive.

Description

technical field [0001] The invention relates to the technical field of pressure-sensitive adhesives, in particular to a polyacrylate pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] Due to its environmental friendliness, non-toxicity, no VOC emission, large molecular weight, high solid content, and low price, water-based acrylic pressure-sensitive adhesives have been widely used in more and more fields, especially in the medical field. Gauze patches, hemostatic patches, medicated patches and other medical products are the link between the human body, and water-based acrylate has natural advantages. [0003] However, due to the large molecular weight of water-based acrylate, the molecular chains are seriously entangled, and the movement ability of the molecular chain is very weak. When used as a medical adhesive, its disadvantages of being difficult to breathe and waterproof hinder its advancement to higher-end applications. Conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/38C09J7/25C09J151/08C08F283/12C08F220/14C08F220/18C08F212/08
CPCC08F283/124C09J7/22C09J7/38C09J151/08C08F220/14C08F212/08
Inventor 白永平岳利培李卫东席丹殷晓芬李晶波
Owner HARBIN INST OF TECH WUXI RES INST OF NEW MATERIALS
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