Flame-retardant biodegradable polyester and preparation method thereof

A biodegradable polyester and flame-retardant technology, applied in the field of flame-retardant polyester, can solve the problems of difficulty in meeting practical application requirements, lower elongation at break, and high demand for phosphorus content, so as to reduce usage and increase thermal stability , Improve the effect of carbonization rate

Active Publication Date: 2021-10-01
HANGZHOU XINFU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The prior art reports a preparation method of flame-retardant block copolyester, which is prepared by esterification and then polycondensation according to a certain proportion of acid-alcohol molar ratio and catalyst. Obtain polyester prepolymer; The obtained polyester prepolymer and phosphorus-containing diol or diacid are blended or melt-blended to obtain a phosphorus-containing blend of polytrimethylene terephthalate, and the prior art uses phosphorus as a barrier Combustible functional elements have a high demand for phosphorus content, and due to the introduction of more side group chains, the elongation at break is reduced, the melt strength is low, and the hue is poor, which is difficult to meet the actual application requirements.

Method used

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  • Flame-retardant biodegradable polyester and preparation method thereof
  • Flame-retardant biodegradable polyester and preparation method thereof
  • Flame-retardant biodegradable polyester and preparation method thereof

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preparation example Construction

[0033] The invention provides a preparation method of flame-retardant biodegradable polyester, comprising:

[0034] Esterifying dibasic acid, dibasic alcohol, silanol flame retardant monomer and catalyst to obtain the first reaction product;

[0035] performing polycondensation reaction of the first reaction product and diepoxysilane to obtain a second reaction product;

[0036] The second reaction product, the phosphorus-containing chain extender and the nitrogen-containing auxiliary chain extender are subjected to a chain extension reaction; and a flame-retardant biodegradable polyester is obtained.

[0037] In the present invention, the dibasic acid is preferably selected from one or more of aliphatic dibasic acids and aromatic dibasic acids; the aliphatic dibasic acid is preferably selected from oxalic acid, malonic acid, One of succinic acid, glutaric acid, adipic acid, suberic acid, sebacic acid and malic acid; the aromatic dibasic acid is preferably selected from terep...

Embodiment 1

[0075] Add 3.984kg of terephthalic acid, 3.796kg of adipic acid, 379.0g of organosilicon diol (diphenylsilanediol), 8.1kg of 1,4-butanediol, and 31.44g of tetrabutyl titanate to the reaction In the kettle, stir and heat up to 230°C for 1.5h, add 95.50g of diepoxysilane (1,1,3,3-tetramethyl-1,3-bis-[2-[7-oxidized bicyclo[4.1. 0] hept-3-yl] ethyl] disiloxane), then heated to 250 ° C, vacuum 100Pa polycondensation reaction 2h, added 314.4g phenyl phosphoryl dichloride and 125.76g cyclic carbodiimide to the system (TCC-NP of Teijin Group), reacted for 15 minutes to obtain flame-retardant biodegradable polyester.

Embodiment 2

[0077] Add 4.15kg of terephthalic acid, 5.05kg of sebacic acid, 4.95kg of 1,4-butanediol, 370.0g of organosilicon diol (diisopropylsilanediol), and 11.9g of tetrabutyl titanate in sequence In the reaction kettle, stir and heat up to 230°C for 2 hours, add 249.0g of diepoxysilane (1,1,3,3-tetramethyl-1,3-bis-[2-[7-oxidized bicyclo[4.1. 0] hept-3-yl] ethyl] disiloxane), then heated to 250 ° C, vacuum 100Pa polycondensation reaction 3h, added 261.8g phenylphosphoryl dichloride and 59.5g cyclic carbodiimide to the system (TCC-FP20M of Teijin Group), reacted for 20 minutes to obtain flame-retardant biodegradable polyester.

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Abstract

The invention belongs to the technical field of flame-retardant polyester, and particularly relates to flame-retardant biodegradable polyester and a preparation method thereof. The preparation method provided by the invention comprises the steps: carrying out esterification reaction on binary acid, dihydric alcohol, a silanol flame-retardant monomer and a catalyst to obtain a first reaction product; carrying out condensation polymerization on the first reaction product and diepoxy silane to obtain a second reaction product; and carrying out a chain extension reaction on the second reaction product, a phosphorus-containing chain extender and a nitrogen-containing chain extending aid, to obtain the flame-retardant biodegradable polyester. According to the method provided by the invention, silicon, phosphorus and nitrogen elements are simultaneously introduced to a polyester molecular chain, and the synergistic effect of the three elements of silicon / phosphorus / nitrogen is realized, so that the prepared biodegradable polyester material is excellent in flame retardant property, low in terminal carboxyl group concentration and good in color value. The invention also provides the flame-retardant biodegradable polyester.

Description

technical field [0001] The invention belongs to the technical field of flame-retardant polyester, and in particular relates to a flame-retardant biodegradable polyester and a preparation method thereof. Background technique [0002] With the introduction of policies related to the current plastic ban and plastic restriction order, people pay more and more attention to the research and application of biodegradable polyester, and have developed a variety of biodegradable polyester products. In the process of research and development, researchers found that biodegradable polyester is extremely flammable, has a high calorific value and drips severely when burned, so it is particularly important to develop flame-retardant and degradable polyester. For example, flame-retardant biodegradable automotive interior, dustproof cloth, film, packaging, textile and other fields have been widely used. [0003] Polyester is a general term for polymers obtained by polycondensation reaction o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/695C08G63/692C08G63/685C08G63/78
CPCC08G63/6956C08G63/6926C08G63/6856C08G63/78C08G2230/00
Inventor 梁宁刘学愚庞买只莫凯白彦兵汪军孙小锋姜伟林余建新曹大成周娟
Owner HANGZHOU XINFU TECH CO LTD
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