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N-salicylidene zinc glycinate compound and application thereof as PVC heat stabilizer

A technology based on zinc glycinate and salicinate, which is applied in the field of zinc-containing compounds to achieve the effects of easy availability of raw materials, improvement of initial colorability, and good application prospects

Active Publication Date: 2013-07-03
SHENZHEN AIMSEA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, with N - Zinc salicylidene glycinate is used as an independent zinc source or forms a composite zinc source with fatty acid zinc to improve the thermal stability of PVC. There is no relevant literature disclosure

Method used

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  • N-salicylidene zinc glycinate compound and application thereof as PVC heat stabilizer
  • N-salicylidene zinc glycinate compound and application thereof as PVC heat stabilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] N - Preparation of zinc salicylidene glycinate compound:

[0021] Add 75 g of glycine, 500 mL of deionized water, and 40 g of NaOH into a 2L beaker, and stir to form a solution.

[0022] Salicylaldehyde ethanol solution (122 g of freshly distilled salicylaldehyde dissolved in 500 mL of ethanol) was dropped into the aqueous solution in the above 2L beaker, and stirred for 20 min. An aqueous solution of zinc acetate (184 g of zinc acetate dissolved in 500 mL of deionized water) was added into the above 2 L beaker, and kept stirring for 20 min. After standing overnight, crystals precipitated out. After suction filtration, washing with water, washing with alcohol, and drying, the target product was obtained. The filtrate is retained and can be used for the subsequent synthesis of the target product.

Embodiment 2

[0024] The composition of the test formulations is shown in Table 1 below. The data are in parts by weight based on 100 parts by weight of PVC resin.

[0025] Table 1

[0026]

[0027] Put the above mixture on a two-roller plasticizing machine with a roller temperature of 160°C and a roller distance of 1 mm for 3 minutes. After taking the piece, cut it into a 2 cm × 2cm square test piece. According to the requirements of GB / T 7141-92 standard, put The PVC sheets are grouped and placed in the aging oven in order, and the oven aging test is carried out at 170±1°C. The test pieces are taken out every 10 minutes, and the changes in the color of the test pieces are observed and recorded. The time lasts until the test pieces appear black. , the results are shown in Table 2;

[0028] Table 2

[0029]

[0030] It can be seen from Table 2 that compared with the comparison formulas 1, 2 and 3, formulas 4, 5 and 6 have improved initial coloring and long-term stability to a cert...

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Abstract

The invention relates to a novel N-salicylidene zinc glycinate compound for improving heat stability of PVC. The novel N-salicylidene zinc glycinate compound has a chemical formula of [ZnL].H2O, wherein L represents coordination negative ions generated by a reaction of salicylaldehyde and glycine. The N-salicylidene zinc glycinate or a composition composed of the N-salicylidene zinc glycinate and a conventional stabilizer component can be used as a stabilizer that enables the PVC to have relatively good heat stability, thereby ideally improving initial dyeing property and the long-term heat stability of the PVC. Besides, the N-salicylidene zinc glycinate has the advantages of convenience for synthesis, easily available raw materials, etc. Therefore, the N-salicylidene zinc glycinate compound has good industrial application prospects.

Description

technical field [0001] The present invention relates to a novel zinc-containing compound for improving the thermal stability of PVC, more specifically, the present invention relates to a N - Application of zinc salicylidene glycinate compound in improving the thermal stability of PVC. Background technique [0002] At present, calcium-zinc heat stabilizers are considered as possible substitutes for lead heat stabilizers, and thus are receiving more and more attention in the polyvinyl chloride (PVC) additives industry. Usually, in the calcium zinc heat stabilizer, fatty acid calcium and fatty acid zinc are used as calcium and zinc raw materials respectively. Fatty acid calcium has a long-term heat stabilization effect, but it affects the initial coloring performance of PVC products. Although fatty acid zinc can improve the initial whiteness of PVC products, it will cause rapid thermal aging of the products ("zinc burn") during the long-term aging process. [0003] In order ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C251/24C08L27/06C08K5/29C08K5/00
Inventor 严一丰
Owner SHENZHEN AIMSEA IND
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