阅读说明：本技术 一种阻燃抗熔滴聚酯材料 (Flame-retardant anti-dripping polyester material ) 是由 王海红 于 2021-06-07 设计创作，主要内容包括：本发明提供一种阻燃抗熔滴聚酯材料,按重量份计,聚酯材料包括以下组分：第一聚酯90～95份；阻燃母粒5～10份；阻燃母粒由以下重量百分比的原料制成：第二聚酯70～75份；改性复合阻燃剂25～30份。本发明的阻燃抗熔滴聚酯材料,具有优异的阻燃抗熔滴性能,制得的聚酯材料的限氧指数达到33.6％(vol)以上,垂直燃烧等级达到UL 94V-0,具有显著的阻燃效果且不存在熔滴现象。(The invention provides a flame-retardant anti-dripping polyester material which comprises the following components in parts by weight: 90-95 parts of first polyester; 5-10 parts of flame-retardant master batch; the flame-retardant master batch is prepared from the following raw materials in percentage by weight: 70-75 parts of a second polyester; 25-30 parts of modified composite flame retardant. The flame-retardant anti-dripping polyester material has excellent flame-retardant anti-dripping performance, the oxygen limit index of the prepared polyester material reaches more than 33.6 percent (vol), the vertical combustion grade reaches UL 94V-0, the flame-retardant effect is obvious, and the dripping phenomenon does not exist.)

1. A flame-retardant anti-dripping polyester material is characterized in that: the polyester material comprises the following components in parts by weight:

90-95 parts of first polyester;

5-10 parts of flame-retardant master batch;

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

70-75 parts of a second polyester;

25-30 parts of modified composite flame retardant.

2. The flame retardant anti-drip polyester material according to claim 1, wherein: the first polyester is poly-p-hydroxybenzoate or poly-diallyl terephthalate.

3. The flame retardant anti-drip polyester material according to claim 1, wherein: the second polyester is polybutylene terephthalate or polyethylene terephthalate.

4. The flame retardant anti-drip polyester material according to claim 1, wherein: the modified composite flame retardant consists of the following components in percentage by weight:

5. the flame retardant anti-drip polyester material according to claim 1, wherein: the polyester material also comprises 0.2-0.3 part of boron oxide.

6. The flame retardant anti-drip polyester material according to claim 1, wherein: the polyester material also comprises 0.4-0.6 part of 2, 5-di-tert-group hydroquinone.

7. The flame retardant anti-drip polyester material according to claim 4, wherein: in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounts for 35-45 wt%, the pentene content accounts for 22-24 wt%, and the balance is vinyl acetate.

8. The flame retardant anti-drip polyester material according to claim 4, wherein: the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer is 3000-3200 g/mol.

Technical Field

The invention relates to the technical field of polyester materials, in particular to a flame-retardant anti-dripping polyester material.

Background

The polyester material has rigid benzene ring and aliphatic chain link in the molecular structure, so that the polyester material has good mechanical property and better processibility and meltability, and is often made into fibers, films, plastic products and the like for wide application.

However, the limit oxygen index of the existing polyester material is only 21%, and the polyester material belongs to flammable grade, can continuously burn under the ignition of a fire source, and is accompanied with extremely large smoke dust; the polyester material has serious melting and dripping phenomena in the combustion process, namely the material is melted to generate drips, and the high-temperature melting drips can easily ignite other objects, so that the combustion is expanded; the molten drops can be continuously combusted when meeting open fire until all the drops are completely combusted, so that the polyester material has great potential safety hazard in use, and the application of the polyester material is greatly limited.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a flame-retardant anti-dripping polyester material which can improve the flame-retardant property of the polyester material. The technical scheme adopted by the invention is as follows:

a flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

90-95 parts of first polyester;

5-10 parts of flame-retardant master batch;

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

70-75 parts of a second polyester;

25-30 parts of modified composite flame retardant.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the first polyester is poly-p-hydroxybenzoate or poly-diallyl terephthalate.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the second polyester is polybutylene terephthalate or polyethylene terephthalate.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the modified composite flame retardant consists of the following components in percentage by weight:

under the condition of high temperature, the zinc borate has strong endothermic reaction, absorbs part of heat released by combustion, reduces the temperature of the surface of combustible, effectively inhibits the generation of combustible gas and prevents the spread of combustion; ti₃GeC₂The flame retardant mechanism is that the heat capacity of the polymer is improved, so that the polymer absorbs more heat before reaching the thermal decomposition temperature, and the flame retardant property of the polymer is improved; the trifluorobromoethylene and the decabromodiphenylethane are cooperated and are in a gas-phase combustion zone with thermal decomposition products at the same time, and the trifluorobromoethylene and the decabromodiphenylethane can capture free radicals in the combustion reaction, so that the propagation of flame is prevented, the flame density in the combustion zone is reduced, and finally the combustion reaction speed is reduced until the combustion reaction is stopped, thereby achieving the purpose of flame retardance; zinc borate, Ti₃GeC₂After being combined with trifluorobromoethylene and ethylene-pentene-vinyl acetate copolymer, the polyester material can be effectively improvedFlame retardant property of zinc borate and Ti₃GeC₂Can produce synergistic effect, and jointly produce effect on the propylene-ethylene-vinyl acetate copolymer; decabromodiphenylethane can improve the anti-dripping performance of polyester materials, and gamma-mercaptopropyltrimethoxysilane can improve zinc borate and Ti₃GeC₂The modified composite flame retardant has compatibility with trifluorobromoethylene and ethylene-pentene-vinyl acetate copolymer, so that the compactness of the modified composite flame retardant is enhanced, and the flame retardant performance and the heat insulation effect are improved.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the polyester material also comprises 0.2-0.3 part of boron oxide. After the boron oxide is combined with the first polyester, the stress in the system can be reduced, and the toughness and compactness of the polyester material are improved, so that the polyester material has higher flame retardant property.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the polyester material also comprises 0.4-0.6 part of 2, 5-di-tert-group hydroquinone. The 2, 5-di-tert-group hydroquinone has a synergistic effect, and after the hydroquinone is combined with boron oxide, the flame retardant property of the polyester material can be synergistically improved, and the internal stress of a system is reduced, so that the hydroquinone has the highest compactness.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounts for 35-45 wt%, the pentene content accounts for 22-24 wt%, and the balance is vinyl acetate. Research shows that when the proportion of propylene, ethylene and vinyl acetate in the propylene-ethylene-vinyl acetate copolymer is limited, better flame retardant performance can be obtained, so the proportion of the propylene, the ethylene and the vinyl acetate is limited.

Preferably, the flame-retardant anti-dripping polyester material is prepared from the following components in percentage by weight: the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer is 3000-3200 g/mol. It has also been found that the number average molecular weight in the ethylene-pentene-vinyl acetate copolymer should also be limited and that beyond this preferred range the flame retardant properties of the polyester material will deviate from optimum values.

A preparation method of a flame-retardant anti-dripping polyester material comprises the following steps: uniformly mixing the modified composite modified flame retardant and the second polyester, and then extruding, granulating and slicing to obtain flame-retardant master batches; and blending the flame-retardant master batch with the first polyester, boron oxide and 2, 5-di-tert-hydroquinone, extruding, melt spinning, and winding to form to obtain the flame-retardant anti-dripping polyester material.

The invention has the advantages that:

the flame-retardant anti-dripping polyester material has excellent flame-retardant anti-dripping performance, the oxygen limit index of the prepared polyester material reaches more than 33.6 percent (vol), the vertical combustion grade reaches UL 94V-0, the flame-retardant effect is obvious, and the dripping phenomenon does not exist.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

70 parts of a second polyester;

30 parts of modified composite flame retardant.

The first polyester is poly-p-hydroxybenzoate, and the second polyester is poly-butylene terephthalate; the modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 35 wt%, the pentene content accounted for 24 wt%, the remainder was vinyl acetate; the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3000 g/mol.

Example 2

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

72 parts of a second polyester;

28 parts of modified composite flame retardant.

The first polyester is polydiallyl terephthalate; the second polyester is polyethylene terephthalate.

The modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 40% by weight, the pentene content accounted for 22% by weight, and the remainder was vinyl acetate, and the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3100 g/mol.

Example 3

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

75 parts of a second polyester;

and 25 parts of modified composite flame retardant.

The first polyester is polydiallyl terephthalate and the second polyester is polyethylene terephthalate.

The modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 45 wt%, the pentene content accounted for 23 wt%, the remainder was vinyl acetate; the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3200 g/mol.

Comparative example 1

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

70 parts of a second polyester;

30 parts of modified composite flame retardant.

The first polyester is poly-p-hydroxybenzoate, and the second polyester is poly-butylene terephthalate; the modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 35 wt%, the pentene content accounted for 24 wt%, the remainder was vinyl acetate; the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3000 g/mol.

Comparative example 2

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

72 parts of second polyester;

28 parts of modified composite flame retardant.

The first polyester is polydiallyl terephthalate; the second polyester is polyethylene terephthalate.

The modified composite flame retardant consists of the following components in percentage by weight:

comparative example 3

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

95 parts of a first polyester;

5 parts of flame-retardant master batch;

0.6 part of 2, 5-di-tert-group hydroquinone.

The flame-retardant master batch is prepared from the following raw materials in parts by weight:

75 parts of a second polyester;

and 25 parts of modified composite flame retardant.

The first polyester is polydiallyl terephthalate and the second polyester is polyethylene terephthalate.

The modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 45 wt%, the pentene content accounted for 23 wt%, the remainder was vinyl acetate; the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3200 g/mol.

Comparative example 4

A flame retardant anti-drip polyester material wherein: the polyester material comprises the following components in parts by weight:

95 parts of a first polyester;

5 parts of flame-retardant master batch;

0.3 part of boron oxide;

the flame-retardant master batch is prepared from the following raw materials in parts by weight:

75 parts of a second polyester;

and 25 parts of modified composite flame retardant.

The first polyester is polydiallyl terephthalate and the second polyester is polyethylene terephthalate.

The modified composite flame retardant consists of the following components in percentage by weight:

in the ethylene-pentene-vinyl acetate copolymer, the ethylene content accounted for 45 wt%, the pentene content accounted for 23 wt%, the remainder was vinyl acetate; the number average molecular weight of the ethylene-pentene-vinyl acetate copolymer was 3200 g/mol. The results of the performance tests of examples and comparative examples are shown below, and the results are shown in Table 1

TABLE 1

	Example 1	Example 2	Example 3	Comparative example 1	Comparative example 2	Comparative example 3	Comparative example 4
								LOI(vol％)	33.6	34.1	35.3	26.4	27.8	24.3	29.1
UL 94	V-O	V-O	V-O	V-3	V-1	V-2	V-1
								Number of molten drops in 10s	1	0	0	15	10	12	8

Comparing examples 1-3 with comparative examples 1-4, it can be seen that the polyester material prepared by the preparation method of the invention has good flame retardant and anti-dripping performance.

Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.