Low-migrated-amount PVC bottle cap sealant and preparation method thereof

A sealant and bottle cap technology, which is applied in the field of food packaging sealing materials, can solve the problems of unsuitable sealant drop molding processing requirements and impracticality, and achieve good viscosity stability, large free volume, and increased movement The effect of the characteristic

Active Publication Date: 2016-07-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

ZL201310559491.9 discloses PVC bottle caps with polyvinyl chloride paste resin as the main raw material, fatty acid acetyl mono- and diglycerides and self-synthesized polyester as plasticizers, supplemented by heat stabilizers, fillers and lubricants For sealant, the emigration amount of oils and fats simulated by n-hexane and n-heptane reaches a very low level of 123mg / Kg and 174mg / Kg respectively, but the viscosity of the sealant enumerated in the examples reaches more than 8000mPa·S, which is not suitable for sealing at all The processing requirements of glue drop molding, therefore, this patent is not practical

Method used

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  • Low-migrated-amount PVC bottle cap sealant and preparation method thereof
  • Low-migrated-amount PVC bottle cap sealant and preparation method thereof
  • Low-migrated-amount PVC bottle cap sealant and preparation method thereof

Examples

Experimental program
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Embodiment Construction

[0027] First prepare hyperbranched polyester plasticizer as follows:

[0028] In a solution of 500mL polyester polyol P500 (M=1800) in tetrahydrofuran-pyridine (v:v=100:20), at 5-10°C with stirring (150-200 rev / min), slowly add butane After the acid chloride was added dropwise, keep the temperature and continue to stir for 2 hours, then distill off tetrahydrofuran under reduced pressure, wash with 10% NaOH solution, and dry in vacuo to obtain the product. The molar ratio of polyester polyol P500 to butyryl chloride is 1:20, and the obtained hyperbranched polyester plasticizer has a molecular weight of 15,000-20,000 and a viscosity of 50mPa·S.

[0029] Embodiment 1~embodiment 6 formula sees the following table:

[0030]

[0031]The preparation method of PVC bottle cap sealant with low migration amount is as follows:

[0032] (1) Under the condition of 100-200 rpm, mix and stir half of the measured DINCH plasticizer, hyperbranched polyester plasticizer and acetyl tributyl c...

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Abstract

The invention discloses a low-migrated-amount PVC bottle cap sealant and a preparation method thereof. The low-migrated-amount PVC bottle cap sealant is formed by combination of PVC paste resin, PVC blend resin, a DINCH plasticizer, a hyperbranched polyester plasticizer, acetyl tributyl citrate, a foamer, a calcium-zinc stabilizer, titanium dioxide and oleamide. The low-migrated-amount PVC bottle cap sealant does not contain phthalic ester plasticizers at all, and the viscosity and the viscosity stability of the low-migrated-amount PVC bottle cap sealant meet the requirements of the rubber patch process. The migrated amount of a seal ring manufactured by the sealant is lower than 150 mg/Kg in n-hexane and n-heptane simulative material, reaching the international advanced level and satisfying the requirement on food safety.

Description

technical field [0001] The invention relates to a sealing material for food packaging, in particular to a PVC bottle cap sealant with low migration amount and a preparation method thereof. Background technique [0002] Food containers, especially food glass bottles used to hold various fruits, pickles, wine, honey, etc., in order to ensure the airtightness of the glass bottles, are generally applied in the groove of the bottle cap or in the bottle cap by plastic dripping. Apply liquid sealant, heat and plasticize to form a sealing ring with certain adhesion and elasticity to the bottle cap, which plays a role of sealing and anticorrosion. Traditional bottle cap sealants use polyvinyl chloride paste resin as the main raw material, together with phthalate plasticizers and various additives. Since phthalates are the main source of environmental hormone effects, food bottle cap sealants that use phthalates as plasticizers are serious hazards to human health. Environmental regu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L67/00C08K13/02C08K3/22C08K5/11C08K5/20C08J9/12
CPCC08J9/12C08J2327/06C08L27/06C08L67/00C08K13/02C08K2003/2241C08K5/11C08K5/20
Inventor 刘士荣倪忠斌沈俊杰陈明清
Owner JIANGNAN UNIV
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