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Detection method for particle size of polymer polyol

A detection method, polyol technology, applied in the direction of particle size analysis, measuring device, particle and sedimentation analysis, etc., can solve the problems of unsuitable graft polymer polyol detection results, errors, etc., to achieve loss prevention, high precision, particle size accurate effect

Active Publication Date: 2013-04-24
SHANDONG BLUSR DONGDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] In order to solve the technical problem that the existing detection method is not suitable for grafted polymer polyol or the error of the detection result is too large, the present invention proposes a method for quickly and accurately detecting the particle size and distribution of grafted polymer polyol

Method used

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  • Detection method for particle size of polymer polyol

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Experimental program
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Effect test

Embodiment 1

[0024] A detection method of polymer polyol particle size, the steps are as follows:

[0025] (1) Select a 150-mesh stainless steel filter, the size of which is length × width × height: 5cm × 5cm × 2cm; weigh 100 grams of polymer polyol sample, and divide it into two parts (accurate to 0.1mg).

[0026] (2) Measure 100ml of isopropanol solvent, dilute one of the polymer polyol samples with isopropanol solvent, filter the diluted sample with a stainless steel filter, and remove the diluted sample by pouring under natural conditions A good sample allows liquids and particles smaller than a certain mesh to pass through.

[0027] (3) Dry the filtered particles together with the filter screen and place them in a vacuum drying oven at 70°C to 100°C for 10 minutes. After cooling the sample and the filter to room temperature, weigh and calculate the content of the particle size of the sample.

[0028] Calculation formula: X = W ...

Embodiment 2

[0037] Except following difference, other is with embodiment 1.

[0038] (1) Weigh 60 grams of polymer polyol sample and divide it into two parts (accurate to 0.1 mg).

[0039] (2) Measure 150ml of ethanol solvent.

[0040] (3) The temperature of the vacuum drying oven is 70-90°C, and the drying time is 5 minutes.

Embodiment 3

[0042] Except following difference, other is with embodiment 1.

[0043] (1) Weigh 80 grams of polymer polyol sample and divide it into two parts (accurate to 0.1 mg).

[0044] (2) Measure 200ml of acetone solvent.

[0045] (3) The temperature of the vacuum drying oven is 80-100°C, and the drying time is 15 minutes.

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Abstract

The present invention relates to a detection method for a particle size of a polymer polyol. In the prior art, the detection method is not applicable for the polymer polyol, or the error of the detection result is big. To solve the technical problems in the prior art, the present invention provides the detection method for the particle size of the polymer polyol. The method comprises the following process steps: weighing a polymer polyol sample; diluting the sample through a solvent; filtering through a screen; placing the filtered particles and the screen in a vacuum drier to carry out drying; cooling the filtered particles and the screen to a room temperature after completing drying, then weighing and calculating the particle size of the sample. The method provided by the present invention is a physical separation method; with the method, the loss of the active ingredients of the polymer polyol during the separation process can be effectively prevented, the active ingredients of thepolymer polyol can be maximally preserved, the particles in the polymer polyol can be effectively separated from the sample through the physical separation, the elementary substances and a certain amount of the compounds can be removed, the detected particle size of the polymer polyol is accurate, and the precision of the detected particle size is high.

Description

technical field [0001] The invention relates to a method for detecting the particle size of polymer polyols. Background technique [0002] Graft polymer polyol is a polymer polyol with a certain particle size. Polymer polyol is formed by graft polymerization of conventional polyether polyol and part of basic polyether with vinyl monomer, initiator, chain transfer agent and other mixtures. things. Polymer polyol, also known as white polyether polymer polyol, is used to prepare high-load or high-modulus soft and semi-rigid polyurethane foam products. Polymer polyol (POP) is widely used in the manufacture of high resilience, high load-bearing, high hardness PU soft foam. [0003] The product quality of polymerized polyol determines its application and the performance of polyurethane prepared with it. In the foaming industry, this kind of organic filled polyether is used partly or completely to replace general-purpose polyether polyols, which can produce foam plastics with lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G01N1/38
Inventor 董立红
Owner SHANDONG BLUSR DONGDA CHEM
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