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Method for improving self-adhesion performance of natural latex-based adhesive

A technology of natural latex and adhesives, applied in natural rubber adhesives, adhesives, polymer adhesive additives, etc., can solve the problems of pressure-sensitive adhesive products such as initial adhesion and adhesion decline, and achieve improved preparation effect, The effect of improving self-adhesive performance and strong self-adhesive performance

Inactive Publication Date: 2019-05-21
NANJING 3H MEDICAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

② There are many surfactants on the surface of milk particles. After coating and drying to form a film, these surface active substances will be enriched on the surface of the pressure-sensitive adhesive and on the bonding interface between the adhesive and the substrate, resulting in a decrease in the initial adhesion of the pressure-sensitive adhesive product. , Decrease in adhesion

Method used

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  • Method for improving self-adhesion performance of natural latex-based adhesive
  • Method for improving self-adhesion performance of natural latex-based adhesive
  • Method for improving self-adhesion performance of natural latex-based adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Based on 100 parts by weight of natural latex, add 10 parts of white oil and 1.5 parts of emulsifier MOA-3 to a stirred tank in a water bath at 45°C, and stir for 10 minutes to obtain a clear emulsion; add 0.05 parts of paraben to the clear emulsion Stir the sodium fat for 5 minutes until the powder is evenly dispersed; add the mixed emulsion to 100 parts of natural latex, stir at 45°C for 10 minutes, add 2 parts of water-based resin 1124, stir for 10 minutes, and then add 0.5 parts of nano-zinc oxide dispersed in 20 parts of water , stirred for 10 minutes, and filtered with a 120-mesh filter to obtain a natural latex-based adhesive.

Embodiment 2

[0028] Based on 100 parts by weight of natural latex, add 10 parts of white oil, 1.5 parts of emulsifier MOA-3, and 0.05 parts of sodium butylparaben to a stirred tank in a water bath at 45°C and stir for 15 minutes; add this clear emulsion to 100 parts of natural latex Stir in the latex for 10 minutes, add 2 parts of water-based resin 1124, stir for 15 minutes, then add 1.0 parts of nano-zinc oxide dispersed in 30 parts of water, and stir for 15 minutes; filter through a 120-mesh filter to obtain a natural latex-based adhesive.

Embodiment 3

[0030] Based on 100 parts by weight of natural latex, add 10 parts of white oil, 1.0 part of emulsifier MOA-3, and 0.05 part of sodium butylparaben to a stirred tank in a water bath at 45°C and stir for 10 minutes; add this clear emulsion to 100 parts of natural latex Stir in the latex for 10 minutes, add 2.5 parts of water-based resin 1124, stir for 10 minutes, then add 1.0 parts of nano-zinc oxide dispersed in 30 parts of water, and stir for 10 minutes; filter with a 120-mesh filter to obtain a natural latex-based adhesive.

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Abstract

The invention discloses a method for improving self-adhesion performance of natural latex-based adhesive. The method comprises the following steps: adding a plasticizer, an emulsifier, a tackifier anda filler in the natural latex, wherein the filler is nano-material; regarding the natural latex as 100 parts by weight, stirring 8-15 parts of the plasticizer and 1.0-2.3 parts of the emulsifier to prepare a clear emulsion, adding 0.02-0.1 part of sodium butylparaben in the clear emulsion, stirring until the powder is uniformly dispersed; adding the prepared mixed emulsion into the natural latex,stirring until the surface is free from oil phase, and adding 1-5 parts of the tackifier, stirring for 10-15 min; slowly adding 0.2-2.0 parts of the filler dispersed by 20-40 parts of water, filtering by using a filter net after the stirring is finished; thereby accomplishing the preparation. The manufacturednatural latex-based adhesive cannot stick on the skin and the hair in the adhesion, and is free from greasy; compared with the common natural latex adhesive on the market, the natural latex-based adhesive disclosed by the invention has stronger self-adhesion performance.

Description

technical field [0001] The invention belongs to the technical field of adhesive preparation, and in particular relates to a method for improving the self-adhesive performance of natural latex-based adhesives. Background technique [0002] Natural latex (NRL) is a renewable polymer material composed of approximately 94% polyisoprene and 6% non-rubber components such as lipids, proteins, carbohydrates, ash, etc. Natural latex pressure-sensitive adhesives have the following advantages: ① No organic solvent is required when used, so there is no fire hazard when coating, and it will not pollute the environment. ② The viscosity of the emulsion changes little with the solid content, so an adhesive with a higher solid content can be prepared. ③The molecular weight of the rubber polymer in the latex is relatively high, so the cohesion of the film after drying is relatively large, and the weather resistance is also relatively good. ④It has a certain self-adhesiveness, and it can be ...

Claims

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Application Information

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IPC IPC(8): C09J107/02C09J11/04C09J11/06C09J11/08
Inventor 朱志阳朱志才陶小亮杨春刘红科李利陶钦
Owner NANJING 3H MEDICAL PROD CO LTD
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