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Phyllosilicate/natural latex composite adhesive film and preparation method thereof

A technology of layered silicate and natural rubber latex, which is applied in the field of preparation of natural rubber latex film, to achieve easy industrialization, enhanced interface performance, obvious effects of tear strength and modulus stress

Active Publication Date: 2015-12-02
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant report on the modification of natural rubber latex by using acid-treated layered silicate as a filler.

Method used

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  • Phyllosilicate/natural latex composite adhesive film and preparation method thereof
  • Phyllosilicate/natural latex composite adhesive film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] 1) Weigh 20 grams of raw sepiolite powder (100-200 mesh) into a beaker, add 400 ml of 1 mol / L hydrochloric acid solution, stir for 15 minutes, and ultrasonically disperse at 70°C for 2 hours. After standing for 12 hours, take the suspension, wash it repeatedly with deionized water, control the density of sepiolite to 20g / L during the drying process after the last washing (pH=6.5), and then adjust its pH value with 1mol / L ammonia water. Adjust to 8 to obtain a 20g / L sepiolite dispersion; get a part of the sepiolite dispersion and dry it, and the SEM photo of the resulting powder is as follows figure 1 shown by figure 1It can be seen that the obtained sepiolite is in the form of short fibers, light and soft, and presents fiber bundles with a diameter of 50-150 nm and a length of 1-5 μm;

[0041] 2) Take by weighing 166.7g concentrated natural rubber latex (solid content 60%), then add sulfur 1g, zinc oxide 0.5g, accelerator PX0.1g, accelerator ZDC0.01g, dispersant NF0.1g...

Embodiment 2

[0056] 1) Weigh 20 grams of raw sepiolite powder (120-200 mesh) into a beaker, add 400 ml of 1 mol / L hydrochloric acid solution, stir for 15 minutes, and ultrasonically disperse at 70°C for 2 hours. After standing still for 12 hours, take the suspension, wash it repeatedly with deionized water, control the density of sepiolite to 20g / L during the drying process after the last washing (pH=6.2), and then adjust its pH value with 1mol / L ammonia water Adjust to 8 to obtain 20g / L sepiolite dispersion;

[0057] 2) Take by weighing 166.7g concentrated natural latex (solid content 60%), then add sulfur 1g, zinc oxide 0.5g, accelerator PX0.1g, accelerator ZDC0.01g, dispersant NF0.1g, 150ml step 1) to prepare The sepiolite dispersion was stirred in a water bath at 60°C for 4 hours to obtain pre-vulcanized natural rubber latex; after that, it was filtered with an 80-mesh filter, and after standing for defoaming, it was salivated into a film according to the conventional process, dried at...

Embodiment 3

[0060] 1) Weigh 20 grams of raw sepiolite powder (20-80 mesh) into a beaker, add 300 ml of 1.5 mol / L sulfuric acid solution, stir for 5 minutes, and ultrasonically disperse at 60°C for 2.5 hours. After standing still for 12 hours, take the suspension, wash it repeatedly with deionized water, control the density of sepiolite to 20g / L during the drying process after the last washing (pH=6.0), and then adjust its pH value with 1mol / L ammonia water Adjust to 8.5 to obtain a sepiolite dispersion with a density of 20g / L;

[0061] 2) Take by weighing 166.7g concentrated natural latex (solid content 60%), then add sulfur 1g, zinc oxide 0.5g, accelerator PX0.1g, accelerator ZDC0.1g, dispersant MF0.1g, potassium hydroxide 0.2g, 100ml of the sepiolite dispersion obtained in step 1), heated in a water bath at 60°C, and stirred for 4 hours to obtain pre-vulcanized natural rubber latex, filtered with an 80-mesh filter, left to defoam, and salivated into a film according to a conventional pr...

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Abstract

The invention discloses a phyllosilicate / natural latex composite adhesive film and a preparation method thereof. The composite adhesive film is mainly prepared from the following components: 142-167 parts by weight of natural latex with the solid content of at least 60%, 50-500 parts by volume of phyllosilicate dispersion solution with the density of 15-25 g / L, 1-5 parts by weight of vulcanizing agent, 1-5 parts by weight of zinc oxide, 0.1-0.5 part by weight of accelerator and 0.1-0.5 part by weight of dispersing agent. When the weight unit is kg, the volume unit is L. The phyllosilicate dispersion solution is prepared by the following steps: taking phyllosilicate, carrying out ultrasonic dispersion in an acid solution with the concentration of greater than or equal to 0.5 mol / L, taking a suspension, repeatedly washing with water until the pH value is approximately neutral, controlling the density of the phyllosilicate to 15-25 g / L, and regulating the pH value to 7-9. The adhesive film has excellent mechanical properties.

Description

technical field [0001] The invention relates to a preparation method of a natural latex film, in particular to a layered silicate / natural latex composite film and a preparation method thereof. Background technique [0002] Natural rubber latex has excellent comprehensive properties, such as good film forming properties, high film mechanical strength, high elongation, good elasticity, storage (especially low temperature storage) stability, and easy processing and vulcanization, etc., and is widely used in the latex industry. However, when natural latex is used to produce film products such as natural latex gloves, it shows great disadvantages in applications due to unsatisfactory tensile strength and tear resistance. Therefore, in order to expand the application field of latex products, it must be modified to improve the mechanical properties of latex products. [0003] In the prior art, the modification of natural rubber latex mainly includes chemical modification and fille...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08K13/04C08K3/22C08K3/34C08K5/09C08K3/06C08K5/39C08K7/10
Inventor 韩飞雪阳辉王玉峰闫普选栗英亮王梦沂
Owner GUILIN UNIV OF ELECTRONIC TECH
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