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Sealant for food and beverage cans and preparation method thereof

A technology for beverage cans and sealants, applied in adhesives, sustainable manufacturing/processing, bio-packaging, etc., can solve problems such as poor retort resistance

Pending Publication Date: 2022-08-09
福建合润包装涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealant in the related art can meet the requirements of food contact, but its cooking resistance is poor

Method used

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  • Sealant for food and beverage cans and preparation method thereof
  • Sealant for food and beverage cans and preparation method thereof
  • Sealant for food and beverage cans and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] Each component and its parts by weight in the embodiment 1-8 of table 2

[0027]

[0028]

[0029] Wherein, the preparation of epoxy-aminosiloxane-modified water-based polyether polyurethane dispersion is as follows:

[0030] Under nitrogen protection, 50 g of polyether polyol (polypropylene glycol, PPG-2000), 5 g of hexamethylene diisocyanate (HDI) and 0.1 g of dibutyltin dilaurate (DBTDL) after vacuum dehydration were added to the In the three-necked flask with reflux condenser, stirrer and thermometer, the temperature was raised to about 90°C for reaction for 2h; 6g epoxy resin E-44 was added, 10g acetone was added to adjust the viscosity of the system, after 1h of reaction, the temperature of the system was lowered to 60°C, 5g was added 3-Aminopropyltriethoxysilane (KH550), react for 1h; then sample and measure the isocyanate content in the reactant; after reaching 0.78%, add 2g of dimethylolpropionic acid (DMPA) to react for 1h; add 1.5g Triethylamine (TEA) ...

Embodiment 9

[0037] Example 9: a sealant for food and beverage cans, the difference from Example 8 is that the weight part of silica sol is set to 1 part, and the weight part of water is set to 19.95 parts.

Embodiment 10

[0038] Example 10: A sealant for food and beverage cans, the difference from Example 8 is that the parts by weight of silica sol are set to 3 parts, and the parts by weight of water are set to 17.95 parts.

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Abstract

The invention relates to the field of polymer sealing materials, and particularly provides a sealant for food and beverage cans and a preparation method of the sealant. The sealant is prepared from the following raw materials in parts by weight: 30 to 50 parts of waterborne polyurethane dispersion, 1 to 100 parts of silica sol, 15 to 35 parts of filler, 1.0 to 3.0 parts of pigment, 0.02 to 0.15 part of defoaming agent, 0.2 to 2.0 parts of dispersing agent, 0.2 to 2.0 parts of antioxidant, 0.5 to 2.5 parts of surfactant, 0.1 to 1.0 part of thickening agent, 0 to 10 parts of tackifying resin and 5 to 25 parts of water, wherein the water-based polyurethane dispersion is an epoxy-amino siloxane modified water-based polyether polyurethane dispersion, and the filler comprises kaolin and nano calcium carbonate, so that the sealant is small in odor and excellent in steaming and boiling resistance, and can meet the food contact requirement.

Description

technical field [0001] The invention belongs to the field of sealing materials, in particular to a sealant for food and beverage cans and a preparation method thereof. Background technique [0002] Sealants for food and beverage cans that are resistant to high temperature cooking are usually made of rubber particles and additives dispersed in water in liquid form, and then flowed into the lid edge of the metal container by a nozzle with a certain pressure, which requires the glue to have suitable fluidity, Viscosity, film-forming, adhesiveness, and good stability, not only resistant to cooking and sterilization after molding, but also resistant to various media such as meat, aquatic products, fruits and vegetables, beverages, etc. Acid and alkali corrosion. [0003] The traditional natural latex ammonia is stored, and the ammonia water has a strong pungent smell, which is not friendly to both producers and users. The sealant in the related art can meet the food contact req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/08C09J11/04C09J11/08
CPCC09J175/08C09J11/04C09J11/08C08K2003/265C08K2201/011C08L93/04C08L45/00C08L33/00C08K3/346C08K3/26C08K3/36Y02W90/10
Inventor 潘文海翁师德赖少波翁锦熙
Owner 福建合润包装涂料有限公司
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