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Preparation method of rosin / starch based biodegradable hot melt adhesive

A biodegradable, starch-based technology, used in rosin adhesives, starch adhesives, adhesive types, etc., can solve the problems that there are no research reports on rosin/starch-based hot melt adhesives, unfavorable energy utilization, etc., To achieve the effect of reducing dependence, reducing production energy consumption, and having a wide range of raw material sources

Inactive Publication Date: 2015-01-28
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And rosin resin is directly used as a raw material, and needs to be heated and melted when used, which is not conducive to the full utilization of energy
At present, there is no research report on truly biodegradable rosin / starch-based hot melt adhesives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Take 2 kg of glutinous rice starch, add 0.6 kg of a mixture of ethylene glycol and glycerol with a volume ratio of 1:1, mix for 10 min under high-speed stirring at 3000 r / min, let stand for 24 h, and then heat to 120 °C to form Melted gelatinous, extruded and diced to obtain thermoplastic glutinous rice starch granules for later use.

[0030] 2) Take 2 kg of rosin, heat it to 150°C under the protection of nitrogen to form a molten state, start stirring, add 0.7 kg of glycerol, 0.06 kg of zinc oxide, 0.004 kg of antioxidant, react at 240°C for 6 hours, and cool down to 150 After ℃, 2 kg of thermoplastic glutinous rice starch granules and 0.4 kg of paraffin were added, mixed for 20 minutes, cooled and discharged to obtain a rosin / starch-based biodegradable hot melt adhesive.

[0031] After testing, the melt viscosity is 4.7 Pa·S, the softening point is 86°C, the tensile strength is 4.3 MPa, the elongation at break is 201%, and it takes about 95 days to degrade 50% by t...

Embodiment 2

[0033] 1) Take 2 kg of glutinous rice starch, add 0.6 kg of glycerin, mix for 10 min under high-speed stirring at 3000 r / min, let stand for 24 h, heat to 120°C to form a molten gel, extrude and pelletize Thermoplastic glutinous rice starch granules are ready for use.

[0034] 2) Take 2 kg of rosin, heat it to 150°C under the protection of nitrogen to form a molten state, start stirring, add 0.9 kg of pentaerythritol, 0.06 kg of zinc oxide, 0.004 kg of composite antioxidant composed of antioxidant 1010 and antioxidant 168, React at 260 °C for 6 h, cool down to 150 °C, add 2 kg of thermoplastic glutinous rice starch granules, 0.4 kg of paraffin, mix for 20 min, cool and discharge to obtain rosin / starch-based biodegradable hot melt adhesive.

[0035] After testing, the melt viscosity is 4.3Pa·S, the softening point is 91°C, the tensile strength is 4.1 MPa, and the elongation at break is 196%. It takes about 90 days to degrade 50% by the soil burial method, about 6-7 months Can a...

Embodiment 3

[0037] 1) Take 2 kg of glutinous rice starch, add 0.6 kg of dimethyl sulfoxide, mix for 10 min under high-speed stirring at 3000 r / min, let it stand for 24 h, heat to 120°C to form a molten gel, extrude and cut into pellets Prepare thermoplastic glutinous rice starch granules for later use.

[0038]2) Take 2 kg of rosin, heat it to 150°C under the protection of nitrogen to form a molten state, start stirring, add 0.8 kg of pentaerythritol, 0.06 kg of zinc oxide, 0.004 kg of composite antioxidant composed of antioxidant 1010 and antioxidant 168, React at 260°C for 6 hours, cool down to 150°C, add 2 kg of thermoplastic glutinous rice starch granules, 0.3 kg of paraffin, and 0.1 kg of nano-calcium carbonate, mix for 20 minutes, cool and discharge to obtain rosin / starch-based biodegradable hot melt glue.

[0039] After testing, the melt viscosity is 4.1Pa·S, the softening point is 88°C, the tensile strength is 4.2 MPa, and the elongation at break is 216%. It takes about 90 days o...

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Abstract

The invention discloses a preparation method of a rosin / starch based biodegradable hot melt adhesive. The method is as below: mixing starch and a plasticizer according to the mass ratio of 1:0.2-0.5 under high speed stirring for 10-30 min, standing for 24 h, heating the mixture at 120-140 DEG C into a molten gel, and cooling and dicing to prepare thermoplastic starch grains for standby; under the protection of nitrogen, heating the rosin to 150-200 DEG C, stirring and successively adding polyols, a catalyst and an antioxidant, reacting at 240-280 DEG C for 5-10 h, cooling to 140-160 DEG C, adding the thermoplastic starch grains and a modified agent, mixing for 10-30 min, cooling and discharging to obtain the hot melt adhesive. The hot melt adhesive can reach technical standards requirements of the ordinary commercial hot melt adhesive, can degrade automatically after usage, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a preparation technology of a rosin / starch-based biodegradable hot melt adhesive, which belongs to the field of adhesive production and application. Background technique [0002] Hot melt adhesive is a thermoplastic adhesive made of thermoplastic resin as a matrix, supplemented with tackifiers, plasticizers, antioxidants and other ingredients. It is widely used in construction, automobiles, electronics, packaging, medical treatment, clothing, toys, books Binding and other industries. At present, most of the market is dominated by ethylene-vinyl acetate copolymer (EVA) hot melt adhesives, including some polyethylene and polypropylene hot melt adhesive products. Most of the matrix resins are derived from petrochemical products, which are difficult to achieve biodegradation. The long-term residue in the environment has become an important hidden danger that threatens the safety of the ecological environment, and with the gradual ...

Claims

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Application Information

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IPC IPC(8): C09J103/02C09J193/04C09J11/06C09J11/04
Inventor 罗志刚隋岩
Owner JINGGANGSHAN UNIVERSITY
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