Acid anhydride and epoxy high-molecular chain extension tackifier, and preparation method and application thereof

Abstract

The invention discloses an acid anhydride and epoxy high-molecular chain extension tackifier, and a preparation method and application thereof. The chain extension tackifier is prepared from, by mass, 65 to 90 parts of a matrix substance, 5 to 35 parts of a glycidyl auxiliary agent, 5 to 35 parts of an anhydride auxiliary agent, 0.1 to 1 part of an antioxidant and 0.1 to 1 part of a heat stabilizer. The matrix substance in the invention is a polyhydric alcohol substance, and a multi-component composite system is prepared by utilizing the reaction activity of a glycidyl auxiliary agent, anhydride and an alcoholic hydroxyl group. The composite system can replace anhydride or epoxy polymer chain extenders to be applied to the field of biodegradable plastic processing, so that the processability is improved, and the defects that the existing biodegradable composite material is high in cost and does not have a special processing aid are overcome. Meanwhile, due to the fact that the glycidyl auxiliaries and the anhydride auxiliaries are various, the auxiliaries with corresponding molecular structures can be designed according to different biodegradable materials, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of application of polymer chain extension tackifiers, in particular to an acid anhydride and epoxy polymer chain extension tackifier and its preparation method and application. Background technique [0002] At present, there are no processing aids specifically for biodegradable plastics on the market, and traditional plastic processing aids are often used to produce biodegradable plastic products, resulting in low processing efficiency, high cost, and uncontrollable toxicity of biodegradable plastic products. . At the same time, the current chain extenders mainly include oxazolines, epoxy resins, isocyanates, acid anhydrides and other low-molecular-weight organic compounds. If these small-molecular chain extenders are directly added and used, they will have poor water resistance, local decomposition, and polymerization. The improvement of ester performance is unstable and other disadvantages. [0003] Pate...

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Problems solved by technology

[0002] At present, there are no processing aids specifically for biodegradable plastics on the market, and traditional plastic processing aids are often used to produce biodegradable plastic products, resulting in low processing efficiency, high cost, and uncontrollable toxicity of biodegradable plastic products.

At the same time, the current chain extenders mainly include oxazolines, epoxy resins, isocyanates, acid anhydrides and other low-molecular-weight organic compounds. If these small-molecular chain extenders are directly added and used, they will have poor water resistance, local decomposition, and polymerization. Improvement of ester performance, instability and other disadvantages

[0003] Patent CN109988263A provides an acid anhydride polymer chain extender and its preparation method. The chain extender with relatively large molecular weight is obtained by polymerization reaction and the introduction of the third monomer. However, the polymerization is initiated by an initiator, and the preparation method is cumbersome and expensive. Therefore, it is urgent to develop a chain extension tackifier for biodegradable plastics that can be industrially prepared, which can be used in various biodegradable plastic products to promote biodegradable materials to replace traditional plastics

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