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Preparation method of cardanol bio-based polyol and application of cardanol bio-based polyol in flexible package adhesive

A technology of bio-based polyols and cardanol, which is applied in adhesives, adhesive types, sustainable manufacturing/processing, etc., can solve the problems of low polarity, reduce waste, suppress white spots, and improve peel strength Effect

Pending Publication Date: 2022-05-24
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention: cardanol bio-based polyol is a polyol with a long carbon chain structure in the molecule, has good wettability with the surface of the film substrate, and has relatively low polarity, effectively suppressing white spots and air bubbles , the occurrence of ink dissolution; at the same time, it is a multifunctional cardanol bio-based polyol with fast post-curing. At the same time, the special polyester polyether structure and cardanol long carbon chain structure provide good peel strength

Method used

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  • Preparation method of cardanol bio-based polyol and application of cardanol bio-based polyol in flexible package adhesive
  • Preparation method of cardanol bio-based polyol and application of cardanol bio-based polyol in flexible package adhesive

Examples

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Effect test

Embodiment 1

[0035] Step 1: 2000 parts by mass of cardanol, 550-650 parts by mass of hydrogen peroxide, 40-52 parts by mass of formic acid, and 10-22 parts by mass of phosphoric acid are heated to a temperature of 60 ° C, react for 6 h, and then use 0.5 mol / The potassium hydroxide solution of L was neutralized to PH=7 at room temperature, left standstill to remove the lower layer liquid, retained the upper layer epoxy cardanol, then repeatedly stirred with 2000 parts by mass of water to stand still to remove the lower layer liquid, repeated three times, the epoxy cardanol was in Vacuum dehydration at 100℃ to moisture ≤500ppm, the quality of hydrogen peroxide can be selected from 550 parts, 560 parts, 580 parts, 600 parts, 620 parts, 650 parts, and the quality of formic acid can be selected from 40 parts, 42 parts, 44 parts, 46 parts, 48 ​​parts Parts, 52 parts, phosphoric acid can choose 10 parts, 12 parts, 16 parts, 18 parts, 20 parts, 22 parts.

[0036] Step 2: 300-330 parts by mass of ...

Embodiment 2

[0039] 2000 parts by mass of cardanol, 550 parts by mass of hydrogen peroxide, 40 parts by mass of formic acid, and 10 parts by mass of phosphoric acid were heated to a temperature of 60° C., reacted for 6 h, and then neutralized with 0.5 mol / L potassium hydroxide solution at room temperature To PH=7, stand to remove the lower layer liquid, retain the upper layer epoxy cardanol, then use 2000 mass parts of water to repeatedly stir and stand to remove the lower layer liquid, repeat three times, the epoxy cardanol is vacuum-dehydrated at 100 ° C to moisture≤500ppm, Epoxidized cardanol is obtained. 300 parts by mass of epoxy cardanol intermediate product, 150 parts by mass of phthalic anhydride, 110 parts by mass of diethylene glycol, and 30 ppm of catalyst were reacted at 230°C to prepare cardanol polyester polyol. 500 parts by mass of the cardanol polyester polyol product, 50 ppm of catalyst, and 550 parts by mass of propylene oxide at 60°C were introduced, and after the passag...

Embodiment 3

[0042] 2000 parts by mass of cardanol, 560 parts by mass of hydrogen peroxide, 42 parts by mass of formic acid, and 12 parts by mass of phosphoric acid were heated to a temperature of 60 ° C, reacted for 6 h, and then neutralized at room temperature with 0.5 mol / L potassium hydroxide solution To PH=7, stand to remove the lower layer liquid, retain the upper layer epoxy cardanol, then use 2000 mass parts of water to repeatedly stir and stand to remove the lower layer liquid, repeat three times, the epoxy cardanol is vacuum-dehydrated at 100 ° C to moisture≤500ppm, Epoxidized cardanol is obtained. 305 parts by mass of epoxy cardanol intermediate product, 148 parts by mass of phthalic anhydride, 108 parts by mass of diethylene glycol, and 40 ppm of catalyst were reacted at 230° C. to prepare cardanol polyester polyol. 510 parts by mass of the cardanol polyester polyol product, 60 ppm of catalyst, and 540 parts by mass of propylene oxide at 60° C. were passed through, and after pa...

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Abstract

The invention relates to a preparation method of cardanol bio-based polyol and application of the cardanol bio-based polyol in a flexible package adhesive, which comprises the following steps: reacting cardanol with hydrogen peroxide to generate epoxy cardanol, and reacting the epoxy cardanol with phthalic anhydride and diethylene glycol to generate cardanol polyester polyol. And reacting the cardanol polyester polyol with epoxypropane to generate the cardanol bio-based polyol with the hydroxyl value of 168mgKOH / g. The solvent-free polyurethane laminated adhesive comprises a component A and a component B. The component B is composed of cardanol bio-based polyol, epoxy resin, a silane coupling agent and a catalyst, and the component A contains the cardanol bio-based polyol and also contains a prepolymer generated by reaction of polyether polyol and diisocyanate. The problem of solvent-free ink dissolution is effectively solved, the peel strength of the laminated adhesive is improved, the wettability of the laminated adhesive is effectively improved, and white dots are reduced.

Description

technical field [0001] The invention belongs to the technical field of polyurethane solvent-free flexible packaging film-coated adhesive, and mainly relates to a synthesis method of cardanol bio-based polyol and its application in polyurethane solvent-free flexible packaging film-coated adhesive. Background technique [0002] As the country has higher and higher requirements for environmental protection, the traditional solvent-based polyurethane flexible packaging film adhesive is more and more restricted by various national policies. Polyurethane solvent-free flexible packaging film adhesive is an environmentally friendly polyurethane because it does not contain solvents. Flexible packaging lamination adhesive. [0003] Polyurethane solvent-free flexible packaging laminating adhesive has a complex film structure and a wide variety of printing inks used in flexible packaging. Affected by the climate change in winter and summer, different manufacturers have different compoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G18/48C08G18/42C09J175/08
CPCC08G63/916C08G18/4291C08G18/4825C08G18/4018C09J175/08Y02P20/10
Inventor 张立强张翔
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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