Preparation method for chlorinated polyvinyl chloride foaming board

A technology of chlorinated polyvinyl chloride and foamed boards, which is applied in the field of foaming agents, can solve the problems of uneven surface of foamed boards, large cells of foamed boards, and uneven performance, and achieve fine and uniform cells, Good heat resistance and fire resistance, the effect of improving tensile strength

Inactive Publication Date: 2012-12-12
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Insufficient melt strength will lead to large cells in the foam board and long longitudinal section cells
Uneven distribution of cells will directly lead to uneven surface of the foamed sheet, uneven performance, and easy breakage

Method used

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  • Preparation method for chlorinated polyvinyl chloride foaming board
  • Preparation method for chlorinated polyvinyl chloride foaming board
  • Preparation method for chlorinated polyvinyl chloride foaming board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Processing performance test method:

[0023] (1) Rheological test: The mixing temperature of the rheometer (Thermo Hakke Polylab System) was set at 185°C, the rotor speed was 30 rpm, and 68 grams of the mixture was weighed and added to the mixer to start the rheometer until After the torque is constant for 5 minutes, the plasticizing time and equilibrium temperature are read.

[0024] (2) The above-mentioned mixture is pressed into a foam board by a vulcanizing machine, and the sample is prepared according to the test standard. The Vicat softening point is tested according to the ASTMD1525-00 standard, and the notched impact strength is tested according to the GB / T1043-93 standard.

[0025] The following is further described by examples and comparative examples, but the present invention is not limited to these examples.

[0026] The preparation method of embodiment and comparative example is as follows:

[0027] Add chlorinated polyvinyl chloride resin, organic tin s...

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Abstract

The invention discloses a preparation method for a chlorinated polyvinyl chloride foaming board. The preparation method comprises the following steps of: heating chlorinated polyvinyl chloride resin, organic tin stabilizer, composite foaming agent of 4,4'-oxybis (benzenesulfonyl hydrazine)and azobisformamide, and other additives except anti-impact modifier to 80-90 DEG C, adding the anti-impact modifier and heating until 100 DEG C to 120 DEG C, cooling to 25 DEG C to 45 DEG C, granulating after discharging, delivering the particles into an extruding machine, and shaping after extrusion to obtain the chlorinated polyvinyl chloride foaming board; and the composite foaming agent is a composite of 4,4'-oxybis benzenesulfonyl hydrazine and azobisformamide, and the weight ratio of 4,4'-oxybis benzenesulfonyl hydrazine to azobisformamide is (3-1):1. The chlorinated polyvinyl chloride (CPVC) foaming bard obtained via the preparation method is provided with an expansion rate of 300 percent, and the obtained board product is provided with a remarkable mechanical force property.

Description

technical field [0001] The invention relates to a preparation method of a chlorinated polyvinyl chloride foamed board, in particular to a foaming agent. Background technique [0002] Chlorinated polyvinyl chloride (CPVC) foam board has the following characteristics: 1. Sound insulation, sound absorption, heat insulation, heat preservation; 2. Flame retardant, self-extinguishing without fire, safe to use; 3. Moisture-proof, mildew-proof, non-absorbent And the shockproof effect is good; 4. Light in texture, convenient for storage, transportation and construction; 5. It can be drilled, sawed, nailed, planed, glued, etc. like wood; 6. It can be welded according to general welding procedures, and can also be used with other PVC / CPVC material bonding; 7. PVC foam board has a smooth surface and can also be printed. Therefore, it is widely used in passenger cars, train car ceilings, interior decoration panels, building exterior wall panels, interior decoration panels, commercial d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/24C08L51/00C08L33/10C08K3/26C08J9/10B29C47/00B29C47/92B29C48/04B29C48/92
CPCB29C48/04
Inventor 郭晓燕王健郑皓
Owner SHANGHAI CHLOR ALKALI CHEM
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