Latex emulsion adhesive with stable mechanical properties, and preparation method thereof

An adhesive and emulsion technology, applied in the direction of adhesives, natural rubber adhesives, polymer adhesive additives, etc., can solve the problems of unstable mechanical properties and effects, and achieve the advantages of improving mechanical properties, improving stability and enhancing stability. Effect

Active Publication Date: 2020-04-10
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] CN109777322A discloses a method for improving the self-adhesive properties of natural latex-based adhesives, which involves adding nanoparticles into the adhesive as a filler, and the self-adhesive properties of the adhesive are improved by about 160%, but the effect of the improved mechanical properties is unstable

Method used

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  • Latex emulsion adhesive with stable mechanical properties, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 100 g of natural latex and 1.0 g of regenerated silk fibroin solution were placed in a stirred tank at 40° C. and stirred at a constant temperature for 30 minutes to prepare a natural latex-regenerated silk fibroin mixed emulsion. Put 5.0g of white oil and 0.5g of emulsifying thickener C-580 into a beaker, stir at 40°C for 5 minutes, then pour it into a stirring tank, continue to stir for 5 minutes, add 4.0g of water-based tackifying resin XY- 8025, stirred for 5 minutes, then added 0.15g of defoamer B-422, stirred for 5 minutes, after the stirring was completed, filtered, and the finished adhesive was obtained.

Embodiment 2

[0029] 100 g of natural latex and 2.0 g of regenerated silk fibroin solution were placed in a stirred tank at 40° C. and stirred at a constant temperature for 30 minutes to prepare a natural latex-regenerated silk fibroin mixed emulsion. Put 5.0g of white oil and 0.5g of emulsifying thickener C-580 into a beaker, stir at 40°C for 5 minutes, then pour it into a stirring tank, continue to stir for 5 minutes, add 4.0g of water-based tackifying resin XY- 8025, stirred for 5 minutes, then added 0.15g of defoamer B-422, stirred for 5 minutes, after the stirring was completed, filtered, and the finished adhesive was obtained.

Embodiment 3

[0031] 100 g of natural latex and 3.0 g of regenerated silk fibroin solution were placed in a stirred tank at 40° C. and stirred at a constant temperature for 30 minutes to prepare a natural latex-regenerated silk fibroin mixed emulsion. Put 5.0g of white oil and 0.5g of emulsifying thickener C-580 into a beaker, stir at 40°C for 5 minutes, then pour it into a stirring tank, continue to stir for 5 minutes, add 4.0g of water-based tackifying resin XY- 8025, stirred for 5 minutes, then added 0.15g of defoamer B-422, stirred for 5 minutes, after the stirring was completed, filtered, and the finished adhesive was obtained.

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Abstract

The invention discloses a latex emulsion adhesive with stable mechanical properties, and a preparation method thereof. The adhesive mainly comprises, by weight, 100 parts of natural latex, 4-6 parts of a tackifier, 5-6 parts of a plasticizer, 0.2-0.6 part of a thickening agent, 0.1-0.3 part of a defoaming agent and 1-10 parts of a toughening agent, wherein the toughening agent is a regenerated silk fibroin solution prepared from silk powder. Silk fibroin fibers and natural latex proteins adopted in the invention generate a cured structure, so that the structural stability of the natural latexis enhanced, and the natural latex is not prone to crosslinking with other assistants, thereby the self-adhesion of the adhesive is also reduced.

Description

technical field [0001] The invention relates to a latex emulsion adhesive with stable mechanical properties and a preparation method thereof, belonging to the technical field of adhesive preparation. Background technique [0002] In recent years, the application range of adhesives has become more and more extensive, mainly used in medical, sports equipment, electronics industry, general industry, packaging and other fields, as the bonding of sports protection tapes, bandages, packaging tapes, double-sided tapes and labels, etc. Some are widely used. [0003] Natural latex is latex collected from natural plants, filtered and coagulated to make natural polymer compounds with polyisoprene as the main component. The latex particle of natural latex is essentially a polyisoprene core surrounded by a shell of non-rubber components (such as proteins and lipids). From the chemical structure of natural latex, it can be seen that natural latex is a non-polar unsaturated rubber, and i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J107/02C09J11/08
CPCC08L2205/035C09J11/08C09J107/02C08L89/00
Inventor 李利沈健侯迪
Owner NANJING NORMAL UNIVERSITY
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