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Composite heat stabilizer for PVC (polyvinyl chloride)

A composite heat stabilizer and heat stabilizer technology, which is applied in the field of polymer materials, can solve problems such as unsatisfactory effects, environmental pollution, and inability to use, and achieve good thermal stability effects and weather resistance effects, heat stability effects, and weather resistance effects. Good, excellent thermal stability effect

Inactive Publication Date: 2015-08-26
GUANGZHOU XIANGHUAN NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional PVC heat stabilizers contain heavy metals such as lead and cadmium, which are highly toxic and bioaccumulative, and will pollute the environment after being discarded, and cannot be used in food, medical and hygiene products, and toys that have high safety requirements Products, has gradually withdrawn from the stage of history
Organotin heat stabilizers have excellent heat stability, but are expensive; while calcium / zinc metal soaps are clean, environmentally friendly, and inexpensive, but the effect of pure metal soap heat stabilizers is not very satisfactory, especially in hard products

Method used

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  • Composite heat stabilizer for PVC (polyvinyl chloride)
  • Composite heat stabilizer for PVC (polyvinyl chloride)
  • Composite heat stabilizer for PVC (polyvinyl chloride)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 Preparation of aromatic 1,3,4 oxadiazole derivatives and complexes thereof

[0033] One, the preparation of aromatic 1,3,4 oxadiazole derivatives, its structural formula is as follows:

[0034]

[0035] Preparation method: Mix benzohydrazide and phosphoric acid in a molar ratio (1:10), then slowly heat to 200-220°C while stirring, react for 1 hour, then cool to 120°C and add the precipitate obtained into sodium carbonate solution to dissolve Remove the residue, filter, wash repeatedly, and recrystallize through N,N-2-methylacetamide to obtain a solid, which is the aromatic 1,3,4 oxadiazole derivative of the above structure.

[0036] 2. Preparation of complexes of aromatic 1,3,4 oxadiazole derivatives

[0037] Co(NO) was titrated with ethylenediaminetetraacetic acid (EDTA) 3 ) 2 ·6H 2 The concentration of O is 0.01mol / L, and in KNO with a concentration of 0.1mol / L 3 The solution is mixed with the aromatic 1,3,4 oxadiazole derivative prepared in this exa...

Embodiment 2

[0038] Example 2 Preparation of aromatic 1,3,4 oxadiazole derivatives and complexes thereof

[0039] One, the preparation of aromatic 1,3,4 oxadiazole derivatives, its structural formula is as follows:

[0040]

[0041] Preparation method: Mix benzohydrazide, p-aminobenzohydrazide and phosphoric acid in a molar ratio (0.5:0.5:10), then slowly heat to 200-220°C while stirring, react for 1 hour, and then cool to 120°C to obtain Add the precipitate into the sodium carbonate solution to remove the residual count, filter, wash repeatedly, and then recrystallize through N,N-2-methylacetamide to obtain a solid, that is, the aromatic 1,3,4 oxadiazole derivative of the above structure thing.

[0042] 2. Preparation of complexes of aromatic 1,3,4 oxadiazole derivatives

[0043] Co(NO) was titrated with ethylenediaminetetraacetic acid (EDTA) 3 ) 2 ·6H 2 The concentration of O is 0.01mol / L, and in KNO with a concentration of 0.1mol / L 3 The solution is mixed with the aromatic 1,3,...

Embodiment 3

[0044] Example 3 Preparation of aromatic 1,3,4 oxadiazole derivatives and complexes thereof

[0045] One, the preparation of aromatic 1,3,4 oxadiazole derivatives, its structural formula is as follows:

[0046]

[0047] Preparation method: Mix benzohydrazide, salicylic acid hydrazide hydrazide and phosphoric acid in a molar ratio (0.5:0.5:10), then slowly heat to 200-220°C while stirring, react for 1 hour, and then cool to 120°C The obtained precipitate is added to sodium carbonate solution to remove the residual count, filtered, washed repeatedly, and then recrystallized by N,N-2-methylacetamide to obtain a solid, that is, the aromatic 1,3,4 oxadiazole of the above structure derivative.

[0048] 2. Preparation of complexes of aromatic 1,3,4 oxadiazole derivatives

[0049] Co(NO) was titrated with ethylenediaminetetraacetic acid (EDTA) 3 ) 2 ·6H 2 The concentration of O is 0.01mol / L, and in KNO with a concentration of 0.1mol / L 3 The solution is mixed with the aromatic...

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Abstract

The invention relates to the technical field of polymer materials, and particularly discloses a composite heat stabilizer for PVC (polyvinyl chloride). The composite heat stabilizer for PVC comprises the following components: (1), an aromatic 1,3,4 oxadiazole derivative or an aromatic 1,3,4 oxadiazole derivative complex; (2), a Ca / Zn heat stabilizer. The composite heat stabilizer takes the aromatic 1,3,4 oxadiazole derivative or the aromatic 1,3,4 oxadiazole derivative complex as a main-effect stabilizer, contains no heavy metal, is non-toxic and environment-friendly, and can be widely applied to food, health care and toy products with higher safety requirements.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a composite thermal stabilizer for PVC. Background technique [0002] Polyvinyl chloride (PVC) is the second largest general-purpose plastic in terms of output after polyethylene. It has the advantages of high strength, corrosion resistance, flame retardancy, insulation, and transparency. It is widely used in industrial construction, agriculture, daily necessities, packaging, Ceremony, public utilities and other fields. However, since the PVC polymer chain contains unstable chlorine atoms, it begins to decompose and release HCl at 100°C, and a jerky conjugated polyene structure is formed on the molecular chain, and the product changes color. HCl has a catalytic effect on the degradation of PVC. The accumulation of HCl greatly accelerates the degradation of PVC, which makes the material acceptance sharply deepened, the physical and mechanical properties decrease, and ev...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08K5/00C08K5/353C08K5/098
CPCC08K5/098C08K5/353C08K2201/014C08L2201/08C08L27/06
Inventor 朱建湘周进
Owner GUANGZHOU XIANGHUAN NEW MATERIAL CO LTD
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