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Preparation method of foaming agent master batch

A technology of foaming agent and composite foaming agent is applied in the field of preparation of new-type micro-foamed polypropylene special melt-strength-enhancing environment-friendly foaming agent masterbatch, which can solve the problem that the production requirements and materials of large-scale injection-molded plastic parts cannot be met. The influence of molding fluidity and other problems can achieve the effects of controllable decomposition temperature, large controllable range of decomposition temperature, and environmental protection of decomposition products.

Active Publication Date: 2020-03-27
中化石化销售有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although improving the melt strength can effectively prevent bubbles from melting and coming out, it has a great impact on the molding fluidity of the material and cannot meet the production needs of large-scale injection-molded plastic parts.

Method used

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  • Preparation method of foaming agent master batch
  • Preparation method of foaming agent master batch
  • Preparation method of foaming agent master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 10 parts of glycerol, 20 parts of oxalic acid, and 10 parts of ethylene glycol to the reaction kettle in parts by mass, so that the mass ratio of the three reactants is 1:2:1, and the reaction kettle is preferably a polycondensation reaction kettle. The reactor is sealed, heated to 120°C, and dehydrated for 2h under the condition of a vacuum of 0.08MPa; after that, press the reactants (ie a mixture of glycerol, oxalic acid, and ethylene glycol, the same below) Add catalyst-p-toluenesulfonic acid to 0.2% of the mass, keep the vacuum degree of the reaction kettle at 0.08 MPa, heat the reaction kettle to 130° C. by using nitrogen protection, and react for 10 hours to obtain hyperbranched polyester.

[0031] Next, add 20% of the total mass of the reactant citric acid and 1% of the total mass of the reactant to the glyceryl monostearate after dewatering to the synthesized hyperbranched polyester. Keep the vacuum of the reactor at 0.08MPa and nitrogen. In a protected manner,...

Embodiment 2

[0034] Add 10 parts of glycerol, 20 parts of oxalic acid, and 20 parts of diethylene glycol into the polycondensation reactor according to mass parts, so that the mass ratio of the three reactants is 1:2:2, seal the reactor, and heat up Dehydrate for 2 hours under the condition of a vacuum of 0.08MPa at 110°C; then add catalyst-DCC at 0.4% of the total mass of the reactants, keep the vacuum at 0.08MPa, and heat the reactor to 140°C under nitrogen protection. 8h, the hyperbranched polyester is obtained.

[0035] Then add 30% of the total mass of the reactants of citric acid and 2% of the total mass of the reactants of lauric acid after removing water to the synthesized hyperbranched polyester. Keep the vacuum at 0.08MPa and heat the reactor to The reaction was carried out at 170° C. for 3 hours to obtain a reaction product, and the reaction product was cooled to obtain a citric acid-loaded hyperbranched polyester composite foaming agent.

[0036] Polyethylene and hyperbranched poly...

Embodiment 3

[0038] Add 40 parts of glycerol, 20 parts of oxalic acid, and 10 parts of adipic acid into the polycondensation reactor according to mass parts, so that the mass ratio of the three reactants is 4:2:1, seal the reactor, and heat up Dehydrate at 100℃ for 2h at a vacuum of 0.08MPa; then add catalyst-DIC at 0.5% of the total mass of the reactants, keep the vacuum at 0.08MPa, and heat up the reactor to 160℃ for 4h. , Get hyperbranched polyester.

[0039] Then add 60% of the total mass of the reactants of citric acid and 2% of the total mass of the reactants of myristic acid after removing water to the synthesized hyperbranched polyester. Keep the vacuum degree at 0.08MPa and heat the reactor to After reacting at 180°C for 2 hours, the reaction product was cooled to obtain a citric acid-loaded hyperbranched polyester composite foaming agent.

[0040] Ethylene-vinyl acetate and hyperbranched polyester composite foaming agent are mixed at a mass ratio of 0.25:1, mixed evenly and pelletize...

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Abstract

The invention relates to a preparation method of a foaming agent master batch, which comprises the following steps: (1) adding glycerol, oxalic acid and a molecular weight regulator into a reaction kettle, and carrying out heating and dehydrating; and after dehydration is completed, adding a catalyst, and heating the reaction kettle to perform reaction for 4-10h under the conditions of vacuum andnitrogen protection so as to obtain hyperbranched polyester; (2) adding citric acid and a compatibility regulator into the hyperbranched polyester, heating the reaction kettle to perform reaction for2-4h under the conditions of vacuum and nitrogen protection to obtain a reaction product, and cooling the reaction product to obtain a citric acid-loaded hyperbranched polyester composite foaming agent; and (3) mixing matrix resin with the hyperbranched polyester composite foaming agent to a uniform state, and granulating the mixture through a granulator to obtain the foaming agent master batch. The foaming agent master batch has the characteristics of small influence on the flowability of polypropylene melt, high mechanical strength after foaming, low cost, adaptability to other fillers and assistants and the like, and has a wide application prospect in the field of large polypropylene injection molding parts.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing a new type of micro-foamed polypropylene special melt strength enhanced environmental protection foaming agent master batch. Background technique [0002] Microcellular foaming material refers to a porous polymer material that takes the material as the matrix and contains cells ranging from tens of microns to hundreds of microns. The polypropylene micro-foam material with polypropylene as the matrix has the characteristics of high tensile strength, low density, excellent impact performance, sound insulation and heat insulation. With the development of automobile lightweight, the use of micro-foamed polypropylene materials has become an important way to reduce automobile weight. According to Trexel's estimation, the overall weight of micro-foaming materials can be reduced by 5% to 20%, which is conducive to lightweight products. In addition, micro-foa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/08C08L23/00C08L67/00C08L67/02C08K5/103C08K5/09C08J9/18C08G63/78C08G63/16C08G63/672C08G63/12
CPCC08J9/18C08J9/0061C08G63/78C08G63/16C08G63/672C08G63/12C08J2323/12C08J2423/12C08J2423/06C08J2423/08C08J2423/00C08J2467/00C08J2467/02C08K5/103C08K5/09C08J2205/044
Inventor 李波梁胜轲王武聪金华杜中杰孙佩鑫侯斌
Owner 中化石化销售有限公司
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