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Preparation method of biodegradable hot melt adhesive

A hot-melt adhesive, biodegradable technology, applied in the preparation of animal glue or gelatin, adhesives, shellac adhesives, etc., can solve the problems of microbial degradation or hydrolysis, achieve fast curing speed, good adhesion, and preparation technology simple effect

Inactive Publication Date: 2016-11-16
郭迎庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: thermoplastic resins such as EVA, PU, ​​PA, polyester, etc. for the currently prepared hot melt adhesive matrix resins all belong to macromolecular organic matter, and because of their special chemical structure and characteristics, they cannot be Microbial degradation or hydrolysis, the disadvantages of long-term retention in the environment, provide a gelatin protein extracted from fish skin, dissolve in warm water and compound with propylene glycol plasticizer to obtain thermoplastic gelatin protein, and then use borax, cashew nut oil, etc. Substances modify shellac resin and rosin resin to obtain composite modified resin, use composite modified resin, polyester amide and thermoplastic gelatin protein as hot melt adhesive matrix resin, add antioxidants, plasticizers and other additives and mix them into A method for obtaining a biodegradable hot-melt adhesive by mixing in a kneader; the present invention utilizes composite modified resin, polyester amide and thermoplastic gelatin protein as the matrix resin of the hot-melt adhesive, all of which are biodegradable, environmentally friendly, and The obtained hot melt adhesive has fast curing speed, good cohesiveness even at high temperature, simple preparation process and low cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] First collect 50g of fish skin from fresh tilapia, put the fish skin into 5% sodium hydroxide solution by mass fraction and soak for 10 hours, take it out after soaking and wash it with clean water for 3 times, then put it into 5% hydrochloric acid solution by mass fraction after cleaning Soak in water for 3 hours, take it out, then put it into clean water according to the solid-to-liquid ratio of 1:5, stir and mix, and then extract at 60°C, 85°C, and 100°C for 1 hour, and put the extract in the refrigerator after the extraction is completed. Leave to cool at 5°C for 20 minutes, centrifuge the cooling liquid at 8000r / min for 15 minutes, and obtain the supernatant as gelatin protein colloid; then vacuum freeze-dry the gelatin protein colloid obtained above to obtain gelatin protein solid, press Mix the solid gelatin protein, propylene glycol and warm water at 60°C with a mass ratio of 2:1:1, and then mix at a high speed of 800r / min for 5 minutes to obtain thermoplastic ge...

example 2

[0019] First collect 75g of fish skin from fresh tilapia, put the fish skin into 5% sodium hydroxide solution by mass fraction and soak for 11 hours, take it out after soaking and wash it with water for 4 times, then put it into 5% hydrochloric acid solution by mass fraction after cleaning Soak in water for 4 hours, take it out, then put it into clean water according to the solid-to-liquid ratio of 1:5, stir and mix, then extract at 65°C, 88°C, and 100°C for 2 hours, and put the extract in the refrigerator after the extraction Leave to cool at 5°C for 25 minutes, centrifuge the cooling liquid at 8500r / min for 18 minutes, and obtain the supernatant as gelatin protein colloid; then vacuum freeze-dry the gelatin protein colloid obtained above to obtain gelatin protein solid, press Mix gelatin protein solids, propylene glycol, and warm water at 65°C in a mass ratio of 2:1:1, and then mix at a high speed of 900r / min for 8 minutes to obtain thermoplastic gelatin protein for use; and ...

example 3

[0022] First collect 100g fish skin from fresh tilapia, put the fish skin into 5% sodium hydroxide solution by mass fraction and soak for 12 hours, take it out after soaking and wash it with water for 5 times, and then put it into 5% hydrochloric acid solution by mass fraction after cleaning Soak in water for 5 hours, take it out, then put it into clean water according to the solid-to-liquid ratio of 1:5, stir and mix, then extract at 70°C, 90°C, and 100°C for 2 hours, and put the extract in the refrigerator after the extraction Leave to cool at 5°C for 30 minutes, centrifuge the cooling liquid at 9000r / min for 20 minutes, and obtain the supernatant as gelatin protein colloid; then vacuum freeze-dry the gelatin protein colloid obtained above to obtain gelatin protein solid, press Mix gelatin protein solids, propylene glycol, and warm water at 70°C with a mass ratio of 2:1:1. After mixing, mix at a high speed of 1000r / min for 10 minutes to obtain thermoplastic gelatin protein fo...

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Abstract

The invention discloses a preparation method of a biodegradable hot melt adhesive, and belongs to the technical field of preparation of hot melt adhesives. The preparation method comprises the following steps: extracting glutin from fishskin; dissolving the glutin in warm water, and compounding the glutin with a propylene glycol plasticizer to obtain thermoplastic glutin; modifying lac resin and rosin resin by using substances such as borax and cashew nut oil to obtain compound modified resin; taking the compound modified resin, polyesteramide and the thermoplastic glutin as hot melt adhesive matrix resin; adding auxiliaries such as an antioxidant and a plasticizer and mixing, and then milling in a mixing mill to obtain the biodegradable hot melt adhesive. The preparation method of the biodegradable hot melt adhesive has the beneficial effects that the compound modified resin, the polyesteramide and the thermoplastic glutin are taken as the hot melt adhesive matrix resin, can be biodegraded and are environmentally friendly, the prepared hot melt adhesive is high in curing speed, and has good adhesion property at high temperature, a preparation process is simple, and the cost is low.

Description

technical field [0001] The invention relates to a preparation method of a biodegradable hot-melt adhesive, belonging to the technical field of hot-melt adhesive preparation. Background technique [0002] Hot-melt adhesive is the abbreviation of hot-melt adhesive. It does not use any solvents in its production and application. It is non-toxic, tasteless, and does not pollute the environment. It is known as "green adhesive" and is especially suitable for use in continuous production lines. Hot-melt adhesive is a polymer adhesive that is coated in a hot-melt state and bonded by cooling and hardening. According to the provisions of the national standard, the definition of hot melt adhesive is "a thermoplastic adhesive that is coated in a molten state and then cooled to a solid state to complete bonding." Solvent-free, 100% solid content, mainly composed of thermoplastic polymers. Hot-melt adhesives have been used in packaging since the late 1950s. Due to their unique advantage...

Claims

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Application Information

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IPC IPC(8): C09J193/02C09J177/12C09J193/04C09J189/00C09J11/04C09J11/06C08H1/06
CPCC09J193/02C08H1/06C08L2201/06C08L2205/02C08L2205/035C09J11/04C09J11/06C09J177/12C08L77/12C08L93/04C08L89/00C08K13/02C08K5/521C08K2003/2237C08K2003/325C08K3/346C08L93/02
Inventor 郭迎庆盛海丰王统军
Owner 郭迎庆
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