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Method for testing and evaluating plate-out performance of lubricant for rigid PVC (polyvinyl chloride)

A technology of rigid polyvinyl chloride and polyvinyl chloride resin, applied in the direction of analyzing materials, measuring devices, color/spectral characteristics measurement, etc., can solve the problems of too much manpower, time-consuming, material consumption, etc., to save manpower, The effect of short time consumption and small number of operators

Inactive Publication Date: 2016-11-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It cannot be seen that this method has the obvious disadvantages of being too time-consuming, material-consuming and too labor-intensive

Method used

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  • Method for testing and evaluating plate-out performance of lubricant for rigid PVC (polyvinyl chloride)
  • Method for testing and evaluating plate-out performance of lubricant for rigid PVC (polyvinyl chloride)
  • Method for testing and evaluating plate-out performance of lubricant for rigid PVC (polyvinyl chloride)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1: Preparation of a series of standard red blocks for colorimetry, the specific steps are as follows:

[0019] (1) Compound preparation: 100phr (parts by mass) PVC resin, 1phr mercaptan methyl tin heat stabilizer, 0.6phr adipic acid-stearic acid pentaerythritol ester lubricant Loxiol G70S (produced by Emery), 1phr titanium dioxide Pigment and different amounts of 4-[(5-chloro-4-methyl-2-sulfonylphenyl)azo]-3-hydroxy-2-naphthoic acid calcium salt pigment (permanent red F5R) were mixed at high speed Knead evenly in the machine to make a compound;

[0020] (2) Preparation of the standard red block: use the mixer of the torque rheometer to mix the compounded materials separately at a temperature of 190 ° C and a rotor speed of 45 rpm, and stop the material 3 minutes after the plasticizing peak appears on the rheological curve. Get the standard red block;

[0021] (3) Calibration of the redness of the standard red block: the redness of the standard red block is calibr...

Embodiment 2 Embodiment 5

[0032] The steps are basically the same as in Example 1, except that in the specific step (1) of step 2, the 0.6 phr adipic acid-pentaerythritol stearate lubricant Loxiol G70S was replaced by 1.0 phr of the lubricant shown in Table 2.

[0033] It can be determined by comparing with the standard red block, the redness of the pressure analysis-cleaned block obtained in Examples 2 to 5 and the pressure analysis property of the tested lubricant are shown in Table 2.

[0034] Table 2 The degree of redness of the cleaned mass obtained in Example 2 to Example 5 and the pressure analysis property of the tested lubricant

[0035]

[0036] a. Produced by Honeywell

[0037] It can be seen from the test results in Table 2 that the method of the present invention can effectively distinguish the pressure separation properties of different lubricants.

Embodiment 6

[0039] The steps are basically the same as in Example 1, except that the 0.6phr adipic acid-pentaerythritol stearate lubricant Loxiol G70S in the specific step (2) of step 1 is replaced by 0.2, 0.4, 0.6, 0.8 and 1.0phr hard Calcium fatty acid.

[0040] It can be confirmed by comparison with the standard red block that the redness of the pressure analysis-cleaned block obtained in this embodiment and the pressure analysis property of the tested lubricant are shown in Table 3.

[0041] Table 3 The degree of redness of the cleaned material block obtained in Example 6 and the pressure analysis property of the tested lubricant

[0042]

[0043] It can be seen from the test results in Table 3 that the method of the present invention can also effectively reveal the influence of the dosage on the pressure-separation performance of the lubricant.

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Abstract

The invention discloses a method for testing and evaluating plate-out performance of a lubricant for rigid PVC (polyvinyl chloride). The method comprises the following steps: preparation of a testing mixture; preparation of a cleaning mixture; mixing of the testing mixture and plate-out cleaning; plate-out performance evaluation of the tested lubricant. The plate-out performance of the lubricant for PVC is tested and evaluated by a torque rheometer, few operators are required for operation, single testing consumes few materials and shorter time, and compared with the prior art, the method saves time, materials and labor remarkably.

Description

technical field [0001] The invention relates to the technical field of chemical testing, in particular to a method for testing and evaluating the pressure-separation properties of lubricants in rigid polyvinyl chloride. Background technique [0002] Polyvinyl chloride (PVC) is one of the five general-purpose plastics. It has the advantages of high strength, plasticization, corrosion resistance, flame retardancy, good insulation, and high transparency. Its products have a wide range of uses. However, due to the strong polarity of PVC, its structural units of each level (including particles and molecules of each level) and between them and the metal surface of the processing equipment have strong interaction and friction, so there are high melt viscosity and material shear. Processability problems such as high frictional heat generation and severe adhesion of the melt to the metal surface of the processing equipment. These processability problems combined with thermal instabi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/28G01N21/25C08K13/02C08K5/58C08K5/103C08K3/22C08K5/42
CPCC08K3/22C08K5/103C08K5/42C08K5/58C08K13/02C08K2003/2241G01N21/25G01N33/2888C08L27/06
Inventor 吴茂英刘陈汪立君胡朔
Owner GUANGDONG UNIV OF TECH
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