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High-heat-resistance PVC/ABS alloy material modified by nanometer calcium carbonate filling material and preparation method thereof

A technology of nano-calcium carbonate and alloy materials, which is applied in the field of high heat-resistant PVC/ABS alloy materials and their preparation, and can solve problems such as mechanical performance degradation, PVC fluidity deterioration, and unfeasible products.

Active Publication Date: 2017-10-24
RES INST OF ZHEJIANG UNIV TAIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, adding a large amount of calcium carbonate to polyvinyl chloride will often cause a sharp drop in mechanical properties, especially the impact on tensile strength and impact strength. The main reason is the poor compatibility of polyvinyl chloride resin with calcium carbonate.
The emergence of nano-calcium carbonate makes it possible to increase the number of calcium carbonate added to strengthen polyvinyl chloride, but the improvement is still very limited, such as "a super-strong high-temperature-resistant PVC water supply pipe" published by Chinese patent CN104877263A, which only contains nano-calcium carbonate 3 -6 parts, according to general scientific literature reports, adding more than this range will lead to a rapid decline in mechanical properties, making the product unfeasible
In addition, adding a large amount of calcium carbonate to polyvinyl chloride will deteriorate the fluidity of PVC, increase the plasticizing peak and equilibrium torque, and the most obvious result is the deterioration of processing performance and the lack of gloss on the product surface
Therefore, there is a serious application bottleneck to enhance the heat resistance of PVC materials through nano-calcium carbonate modification.

Method used

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  • High-heat-resistance PVC/ABS alloy material modified by nanometer calcium carbonate filling material and preparation method thereof
  • High-heat-resistance PVC/ABS alloy material modified by nanometer calcium carbonate filling material and preparation method thereof
  • High-heat-resistance PVC/ABS alloy material modified by nanometer calcium carbonate filling material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] (1) The raw materials are configured according to the following mass parts: 78 parts of PVC, 10 parts of ABS; 6 parts of nano-calcium carbonate; 0.2 parts of pentaerythritol diphosphite; 1 part of calcium-zinc composite stabilizer; 1 part of methoxysilane; 2 parts of dioctyl dicarboxylate; 2 parts of glyceryl monostearate.

[0035] (2) Drying the mass parts of PVC at 80°C for 1 hour;

[0036] (3) Drying the mass parts of ABS at 80°C for 3 hours;

[0037] (4) Mechanically stir and mix the dried PVC / ABS with the aforementioned mass parts of nano-calcium carbonate, heat stabilizer, antioxidant, internal lubricant, and plasticizer for 20 minutes at a stirring rate of 5000 rpm;

[0038] (5) Add the mixture in step (4) and the silane coupling agent in parts by mass to a torque rheometer for molding. The processing technology of the torque rheometer is as follows: the torque rheometer The heating zone is divided into three zones, and the temperature of the three heating zone...

Embodiment 2

[0045] (1) The raw materials are configured according to the following mass parts: 60 parts of PVC, 7 parts of ABS; 20 parts of nano-calcium carbonate; 0.3 parts of 2,8-di-tert-butyl-4-methylphenol; 2 parts of lead salt composite stabilizer; 1 part of epoxy silane; 5 parts of dioctyl phthalate; 5 parts of glyceryl monostearate.

[0046](2) Drying the mass parts of PVC at 75°C for 2 hours;

[0047] (3) Drying the mass parts of ABS at 80°C for 3 hours;

[0048] (4) Mechanically stir and mix the dried PVC / ABS with the aforementioned mass parts of nano-calcium carbonate, heat stabilizer, antioxidant, internal lubricant, and plasticizer for 30 minutes at a stirring rate of 5000 rpm;

[0049] (5) Add the mixture in step (4) and the silane coupling agent in parts by mass to a torque rheometer for molding. The processing technology of the torque rheometer is as follows: the torque rheometer The heating zone is divided into three zones, and the temperature of the three heating zones ...

Embodiment 3

[0056] (1) The raw materials are configured according to the following mass parts: 28 parts of PVC, 5 parts of ABS; 48 parts of nano-calcium carbonate; 0.3 parts of 2,8-di-tert-butyl-4-methylphenol; 1 part of OBS organic base stabilizer; Aminosilane, 2 parts; Dicapryl phthalate 8 parts; Glyceryl monostearate 8 parts.

[0057] (2) Drying the mass parts of PVC at 85°C for 2 hours;

[0058] (3) Drying the mass parts of ABS at 75°C for 4 hours;

[0059] (4) Mechanically stir and mix the dried PVC / ABS with the above mass parts of nano-calcium carbonate, heat stabilizer, antioxidant, internal lubricant, and plasticizer for 25 minutes at a stirring rate of 3000 rpm;

[0060] (5) Add the mixture in step (4) and the silane coupling agent in parts by mass to a torque rheometer for molding. The processing technology of the torque rheometer is as follows: the torque rheometer The heating zone is divided into three zones, and the temperature of the three heating zones is controlled at 18...

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Abstract

The invention especially relates to a high-heat-resistance PVC / ABS alloy material modified by a nanometer calcium carbonate filling material and a preparation method thereof, belonging to the technical field of high polymer materials. Calcium carbonate (CaCO3) is one of the frequently used additives and heatproof modifiers for polyvinyl chloride; however, too high addition amount of calcium carbonate leads to decline of mechanical properties, deterioration of the fluidity of PVC and degradation of processing properties. Directed at the above shortcomings in the prior art, the invention provides the high-heat-resistance PVC / ABS alloy material modified by the nanometer calcium carbonate filling material and the preparation method thereof. According to the invention, dioctyl phthalate and monoglyceride stearate are used for composite modification, so the processing viscosity of a system is greatly reduced and the compatibility between nanometer calcium carbonate and PVC is improved; and two-step processing, i.e., mixing via a mould pressing method and molding via an injection molding process, is carried out, so problems in uniform blending of nanometer calcium carbonate and PVC are further overcome. The high-heat-resistance PVC / ABS alloy material provided by the invention has the advantages of high nanometer calcium carbonate content (as high as 75 parts), high plasticization peaks and balance torque, high impact strength, high toughness, excellent heat resistance, etc.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high heat-resistant PVC / ABS alloy material modified by nanometer calcium carbonate filler and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) used to be one of the most widely used general-purpose plastics in the world. It has excellent comprehensive properties and is widely used. It is widely used in building materials, industrial products, daily necessities, pipes, packaging films, foaming materials, etc. [0003] Among them, calcium carbonate (CaCO3) is one of the most commonly used fillers in the processing of polyvinyl chloride, which can greatly reduce the cost of products. In addition, calcium carbonate has excellent heat resistance and is a common additive for the preparation of heat-resistant and high-temperature resistant PVC materials. [0004] However, adding a large amount of calcium carbonate to polyvinyl chloride w...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L55/02C08K13/02C08K3/26C08K5/524C08K5/13C08K5/12C08K5/103
CPCC08K2003/265C08K2201/003C08K2201/011C08L27/06C08L2201/08C08L55/02C08K13/02C08K3/26C08K5/524C08K5/13C08K5/12C08K5/103
Inventor 宋义虎黄然丁伟伟
Owner RES INST OF ZHEJIANG UNIV TAIZHOU
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