Method for evaluating storage stability of adhesive

A technology of storage stability and evaluation method, applied in the field of evaluation of the storage stability of adhesives, can solve problems such as long time consumption, and achieve the effects of reducing test time, solving long time consumption, and improving test efficiency

Pending Publication Date: 2022-05-31
TECHSTORM MATERIAL TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for evaluating the storage stability of adhesives, which solves the problem of long time consumption in a single experiment of whether the delamination phenomenon is improved in the prior art

Method used

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  • Method for evaluating storage stability of adhesive
  • Method for evaluating storage stability of adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Accurately measure sample 1, sample 2, and sample 3 respectively, put them into three sample cups, then put the three sample cups into the sample mixer, and mix them evenly by vacuuming to eliminate the influence of air bubbles on the later test , the mixing speed is 2000 rpm, and the time is 2 minutes. After mixing, take out sample 1 to be evaluated, sample 2 to be evaluated and sample 3 to be evaluated;

[0053] The rheological curve of the sample 1 to be evaluated, the rheological curve of the sample 2 to be evaluated and the rheological curve of the sample 3 to be evaluated are measured by a rotational rheometer, because the sample to be evaluated 1. The sample 2 to be evaluated and the sample 3 to be evaluated are both yield stress fluids, so the sample 1 to be evaluated, the sample 2 to be evaluated and the sample to be evaluated are obtained according to the steady state scanning test mode. The change curve of the shear stress of the sample 3 evaluated with the s...

Embodiment 2

[0058] Weigh the sample to be evaluated 1, the sample to be evaluated 2, the sample to be evaluated 3 and water of the same quality into a centrifuge tube, tighten the cap, and put the four centrifuge tubes into the centrifuge symmetrically. In the machine casing; set the centrifuge condition, the centrifuge speed in the centrifuge condition is 9000rpm, and the centrifugation time is 30min; start the centrifuge, after the separation is finished, open the centrifuge cover, take out the centrifuge to be evaluated The sample 1, the sample to be evaluated 2 and the sample to be evaluated 3;

[0059] Measure the minimum liquid level height and the maximum liquid level height of the eluate of the sample 1 to be evaluated, the sample 2 to be evaluated and the sample 3 to be evaluated, and the specific values ​​are shown in Table 3;

[0060] The liquid level is equal to the maximum liquid level minus the minimum liquid level.

[0061] The centrifuge tube containing the sample 1 to be...

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Abstract

The invention provides a method for evaluating the storage stability of an adhesive, which comprises the following steps: measuring the performance data of an adhesive sample by using a rotational rheometer, evaluating the first storage stability of the adhesive sample according to the performance data, the performance data comprising a zero shear viscosity value or a yield stress value, resistance to creep deformation and a stress value deviating from a linear region are further included; measuring the liquid level height of the eluate of the adhesive sample and the content of the inorganic filler at different positions in a centrifugal tube through a centrifugal test, and evaluating the second storage stability of the adhesive sample according to the liquid level height and the content of the inorganic filler; and performing mutual verification on the first storage stability and the second storage stability to evaluate the storage stability of the adhesive sample. According to the invention, the problem of long time consumption in a single experiment for judging whether the layering phenomenon is improved or not in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of adhesives, in particular to an evaluation method for storage stability of adhesives. Background technique [0002] The composition of the adhesive includes a main part and an additive part. The main part includes a cross-linkable curable polymer oligomer and a curing agent. The additive part is mainly added according to different performance requirements, among which inorganic mineral fillers are the main ones. The addition of fillers can improve the physical properties of the cured product, and can also reduce production costs. The most commonly used preparation method for adhesives is to add fillers to the oligomer matrix first, mix well, store and transport, and then add curing agent to cure it in the application scene. [0003] In order to solve the phenomenon of filler sedimentation and delamination in the oligomer matrix, the commonly used modification method is to increase the viscosity of the oli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14G01N19/00G01N33/26
CPCG01N11/14G01N19/00G01N33/26
Inventor 林珊珊吉明磊宋丽媛胡文军陈翠萍
Owner TECHSTORM MATERIAL TECH SHANGHAI CO LTD
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