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Biodegradable PTT slice and preparation method thereof

A biodegradation and slicing technology, which is applied in the manufacture of rayon, single-component polyester rayon, chemical characteristics of fibers, etc., can solve problems such as difficult biodegradation, and achieve the effect of reducing environmental pressure and improving hydrophilicity.

Pending Publication Date: 2021-09-28
TONGKUN GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesized biodegradable PTT chip can not only retain the original excellent performance of the PTT chip but also make it overcome the problem that it is difficult to biodegrade

Method used

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  • Biodegradable PTT slice and preparation method thereof
  • Biodegradable PTT slice and preparation method thereof
  • Biodegradable PTT slice and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A biodegradable PTT slice, the biodegradable PTT slice is made of raw materials comprising the following parts by weight:

[0036]

[0037] The inventor has found through a large number of tests: in this embodiment, at first, when using the addition amount of each component described in the present invention, the reaction speed can be made to reach a relative maximum value, and the reaction can be carried out more completely at the same time, and finally obtained High-quality polyester chips can be degraded to the maximum extent, so that the raw materials can be fully utilized and the cost can be reduced. If the amount added is not within the set range, not only the mechanical properties of the obtained polyester will not meet the standards, but also it will not be biodegradable, resulting in complex processes, increased by-products, and waste of resources.

[0038] The preparation method of the biodegradable PTT slice comprises the following steps:

[0039] 1) Unde...

Embodiment 2

[0051] A biodegradable PTT slice, the biodegradable PTT slice is made of raw materials comprising the following parts by weight:

[0052]

[0053] The preparation method of the biodegradable PTT slice comprises the following steps:

[0054] 1) Under the catalysis of titanate, dimethyl terephthalate and 1,3-propanediol are transesterified at 180°C to 190°C to obtain a transesterification product;

[0055] 2) Mixing the transesterification reaction product prepared in step 1) with biodegradable additives, catalysts, and thermal stabilizers to carry out polycondensation reaction.

[0056] In step 1), the titanate is isopropyl titanate.

[0057] In step 1), the methanol vapor generated by the transesterification reaction is separated and processed through distillation, and the generated methanol flows into a methanol receiving tank.

[0058] In step 2), the reaction conditions of the polycondensation reaction are:

[0059] First raise the temperature to 270°C-285°C in a non-...

Embodiment 3

[0066] (1) Take the following raw materials:

[0067] 100kg of dimethyl terephthalate, 75kg of 1,3-propanediol, 85kg of aliphatic dibasic alcohol, 12kg of aliphatic dibasic acid, and 0.25kg of isopropyl titanate.

[0068] The aliphatic dibasic alcohol is ethylene glycol and hexanediol, and the weight ratio of the two is 3:1; the aliphatic dibasic acid is succinic acid and adipic acid, and the weight ratio of the two is 2:1.

[0069] (2) transesterification reaction

[0070] Add dimethyl terephthalate, 1,3-propanediol, and isopropyl titanate into the reaction kettle, gradually raise the temperature to 180°C~190°C, and start the transesterification reaction. During the transesterification process, methanol vapor is formed. The distillation tower is separated, and the methanol vapor at the top of the tower flows into the methanol receiving tank after being condensed. When the temperature at the top of the distillation tower drops, the transesterification reaction ends.

[0071]...

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Abstract

The invention discloses a biodegradable PTT slice and a preparation method thereof, wherein the preparation method comprises the following steps: 1) carrying out ester exchange reaction on dimethyl terephthalate and 1,3-propylene glycol under the catalysis of titanate at the temperature of 180 DEG C-190 DEG C to obtain an ester exchange reaction product; and 2) mixing transesterification reaction product prepared in the step 1) with a biodegradable additive, a catalyst and a heat stabilizer, and carrying out condensation polymerization. The method has the advantages of environmental protection, economy and the like. In the process of synthesizing the PTT slice, a biodegradable agent is added so as to obtain the biodegradable PTT slice. The synthesized biodegradable PTT slice not only can retain the original excellent performance of the PTT slice, but also can overcome the problem that the PTT slice is difficult to biodegrade.

Description

technical field [0001] The invention relates to the technical field of biodegradable polyester chips, in particular to a biodegradable PTT chip and a preparation method thereof. Background technique [0002] PTT fiber belongs to polyester fiber like PET (polyethylene terephthalate) fiber and PBT (polyethylene terephthalate 1,4-butylene terephthalate) fiber. PTT fiber has the characteristics of polyester, nylon, and acrylic fiber. In addition to good antifouling performance, it is also easy to dye, soft to the touch, full of elasticity, and its elongation is as good as spandex fiber. Compared with elastic fiber spandex, it is easier to process, very Suitable for textile and garment fabrics; in addition, PTT fiber also has the characteristics of dryness and crispness. Therefore, in the near future, PTT fiber will gradually replace polyester and nylon and become a large fiber in the 21st century. [0003] Although PTT fiber has excellent performance, there is a serious proble...

Claims

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Application Information

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IPC IPC(8): C08G63/183C08G63/16C08G63/78C08G63/85C08G63/86D01F6/92D01F1/10
CPCC08G63/183C08G63/16C08G63/78C08G63/85C08G63/866D01F6/92D01F1/10
Inventor 李圣军孙燕琳肖顺立林雪燕王春燕施芳婷
Owner TONGKUN GRP
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