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High-performance hard PVC foamed plastic and preparation method thereof

A foam plastic and high-performance technology, which is applied in the field of preparation of high-performance rigid PVC foam plastic, can solve the problems of limiting the application range of PVC foam plastic, poor thermal deformation resistance and thermal stability, and poor impact resistance. Achieve the effect of low oil absorption, easy access and good compatibility

Inactive Publication Date: 2013-07-03
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor impact resistance, thermal deformation resistance and thermal stability of PVC, it cannot be used at higher temperatures, which limits the application range of PVC foam plastics to a large extent.

Method used

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  • High-performance hard PVC foamed plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of high-performance rigid PVC foam plastics, its raw material composition and mass parts are respectively: polyvinyl chloride 100 parts (EPVC:SPVC=3:1); Stearate 10 parts; Foaming agent 23 parts; Activated calcium carbonate 5 parts; PhMI-MMA-AN terpolymer polymer heat-resistant modifier 5 parts. in,

[0025] The percentage by weight of the PhMI-MMA-AN terpolymer polymer heat-resistant modifier is: 25% of N-phenylmaleimide; 55% of methyl methacrylate; 20% of acrylonitrile; water-soluble Initiator 1.5%; Emulsifier 2.5%.

Embodiment 2

[0027] A kind of high-performance rigid PVC foam plastics, its raw material composition and mass parts are respectively: polyvinyl chloride 100 parts (EPVC:SPVC=3:1); Stearate 10 parts; Foaming agent 23 parts; Activated calcium carbonate 5 parts; PhMI-MMA-AN terpolymer polymer heat-resistant modifier 15 parts. in,

[0028] The percentage by weight of the PhMI-MMA-AN terpolymer polymer heat-resistant modifier is: 20% of N-phenylmaleimide; 60% of methyl methacrylate; 20% of acrylonitrile; water-soluble Initiator 2%; Emulsifier 2.5%.

[0029] The preparation steps are as follows:

[0030] Step 1: Put 100 parts of polyvinyl chloride, 10 parts of stearate, 23 parts of foaming agent, 5 parts of activated calcium carbonate and 15 parts of PhMI-MMA-AN terpolymer polymer heat-resistant modifier into the mixing in a container;

[0031] Step 2: Use a high-speed shearing dispersing emulsifier to disperse the mixture for 5 minutes to 8 minutes;

[0032] Step 3: Preheat the mold to 120...

Embodiment 3

[0037] A kind of high-performance rigid PVC foam plastics, its raw material composition and mass parts are respectively: polyvinyl chloride 100 parts (EPVC:SPVC=3:1); Stearate 10 parts; Foaming agent 23 parts; Activated calcium carbonate 5 parts; PhMI-MMA-AN terpolymer polymer heat-resistant modifier 20 parts. in,

[0038] The percentage by weight of the PhMI-MMA-AN terpolymer polymer heat-resistant modifier is: 25% of N-phenylmaleimide; 55% of methyl methacrylate; 20% of acrylonitrile; water-soluble Initiator 1.5%; Emulsifier 2.5%.

[0039] The preparation steps are as follows:

[0040] Step 1: Put 100 parts of polyvinyl chloride, 10 parts of stearate, 23 parts of foaming agent, 5 parts of activated calcium carbonate and 20 parts of PhMI-MMA-AN terpolymer polymer heat-resistant modifier into the mixing in a container;

[0041] Step 2: Use a high-speed shearing dispersing emulsifier to disperse the mixture for 5 minutes to 8 minutes;

[0042] Step 3: Preheat the mold to 1...

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Abstract

The invention relates to high-performance hard PVC foamed plastic and a preparation method thereof. The high-performance hard PVC foamed plastic is technically characterized by comprising the following components: 100 parts of polrvinyl chloride (PVC), 10 parts of stearate, 23 parts of foaming agent, 5 parts of activated calcium carbonate, and 5-30 parts of PhMI-MMA-AN terpolymer high-molecule heat-resisting modifier. The preparation method of the high-performance hard PVC foamed plastic comprises the following steps: stirring and uniformly mixing after metering PVC, the PhMI-MMA-AN terpolymer high-molecule heat-resisting modifier, the foaming agents and processing agents according to formula, and carrying out compression molding in a two-step method. The high-performance hard PVC foamed plastic is good in processing property, good in heat resistance, high in mechanical property, and low in water absorption rate and oil absorption rate; and the PhMI-MMA-AN terpolymer high-molecule heat-resisting modifiers is excellent in performance, has a single higher glass-transition temperature, and is good in compatibility with PVC. Meanwhile, the synthetic material is a traditional material, and is low in cost.

Description

technical field [0001] The invention belongs to the technical field of heat-resistant modification of polymers, and relates to a preparation method of high-performance rigid PVC foam plastics applicable to aviation, spaceflight, transportation and the like. Background technique [0002] Polyvinyl chloride (PVC) is a general-purpose plastic with high mechanical properties, and its foam products also have excellent properties such as light weight, chemical corrosion resistance, flame retardancy, and abundant raw material sources. The output of polyvinyl chloride (PVC) foam is second only to polyurethane (PU) and polystyrene (PS) foam in the world, ranking third. At present, almost all known foam molding techniques are suitable for molding polyvinyl chloride foam. However, due to the poor impact resistance, thermal deformation resistance and thermal stability of PVC, it cannot be used at higher temperatures, which limits the application range of PVC foam plastics to a large ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L33/12C08K3/26C08J9/04C08F220/14C08F220/48C08F222/40C08F2/24
Inventor 齐暑华马莉娜程博杨莎何栋
Owner NORTHWESTERN POLYTECHNICAL UNIV
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