High-toughness flame-retardant amorphous copolyester foam and preparation method thereof

A flame-retardant foam and non-crystalline technology, applied in the field of foam materials, can solve the problems of instability, flammability and brittleness of non-crystalline copolyester, and achieve the effects of preventing foam collapse, improving toughness and high strength

Active Publication Date: 2020-05-15
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that the current non-crystalline copolyester is flammable and brittle, and its melt strength is prone to inconsistent in the foaming process, resulting in instability in the foaming process, and the obtained non-crystalline copolyester Problems such as insufficient toughness of ester foam

Method used

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  • High-toughness flame-retardant amorphous copolyester foam and preparation method thereof
  • High-toughness flame-retardant amorphous copolyester foam and preparation method thereof
  • High-toughness flame-retardant amorphous copolyester foam and preparation method thereof

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preparation example Construction

[0041] Preparation of additive masterbatch:

[0042] According to the ratio of the mixture in Table 2, add it into the internal mixer-single-screw granulation equipment, extrude into strands, cut into pellets, and prepare the additive masterbatch for high-toughness non-crystalline copolymer resin flame-retardant foam. Among them, the temperature of the single screw is set to 90°C, 90°C, 90°C, and the speed is set to 80RPM. EMA (ARKEMA, 29MA03), GMA (DOW in the United States), EVA (DuPont, 250), polyphosphonate flame retardant (Zhuangjing, HM1100 particles), CEPPA flame retardant (Xijia Chemical), DOPO (Xijia Chemical ), PMDA (created by Wuhan Yuancheng), oxazoline BOZ (self-synthesized), hexamethylene diisocyanate ( HDI, Yantai Wanhua), 1076, 168 antioxidants (BASF), 1222 antioxidants (Candis).

[0043] Table 2 Multifunctional Masterbatch Proportion

[0044]

Embodiment 1

[0046] Weigh 92 parts of PETG (dried at 65°C for 6 hours, the same below) and 8 parts of additive masterbatch 1, and send them into the above-mentioned foam molding equipment through an independent metering unit for continuous extrusion and foaming. The extrusion temperature of ZE40 is: 60°C, 120°C, 180°C, 210°C, 215°C, 215°C, 215°C, 215°C, and the screw speed is set at 80rpm. KE90 single screw temperature is 200°C, 200°C, 200°C, 200°C, 200°C, 200°C, speed setting 6rpm, supercritical CO 2 The injection rate is about 2kg / h. In addition, the same proportioning mixture is metered into the Φ35 twin-screw extruder for granulation. Proofing by injection molding machine to obtain a 10mm wide, 4mm thick unnotched impact sample, and test the oxygen index.

Embodiment 2

[0048] Weigh 92 parts of PETG and 8 parts of additive masterbatch 2, and send them into the above-mentioned foam molding equipment through independent metering units for continuous extrusion and foaming. The extrusion temperature of ZE40 is: 60°C, 120°C, 180°C, 210°C, 215°C, 215°C, 215°C, 215°C, and the screw speed is set at 80rpm. KE90 single screw temperature is 200°C, 200°C, 200°C, 200°C, 200°C, 200°C, speed setting 6rpm, supercritical CO 2 The injection rate is about 2kg / h. In addition, the same proportioning mixture is metered into the Φ35 twin-screw extruder for granulation. Proofing by injection molding machine to obtain a 10mm wide, 4mm thick unnotched impact sample, and test the oxygen index.

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Abstract

The invention relates to high-toughness flame-retardant amorphous copolyester foam and a preparation method thereof. The amorphous copolyester foam is obtained by blending, foaming and molding amorphous copolyester and a multifunctional master batch, wherein the multifunctional master batch is prepared from 25-50 parts by weight of a toughening and compatibilizing low-melting-point carrier resin,40-60 parts by weight of a halogen-free flame retardant, 5-10 parts by weight of a tackifier and 2-5 parts by weight of an antioxidant by adopting internal mixer-single screw combination equipment. The obtained amorphous copolyester foam material has the excellent characteristics of high toughness, excellent elongation, oxygen index (LOI) being greater than or equal to 27%, combustion grade of B2or above, high compression strength, high shear strength and the like, and can be applied to the high-end fields of aerospace, wind power, rail transit and the like.

Description

technical field [0001] The invention relates to the technical field of foam materials, in particular to a high-toughness non-crystalline copolyester flame-retardant foam material and a preparation method thereof. Background technique [0002] Amorphous copolyester is a transparent plastic, and the commonly used comonomers are 1,4-cyclohexanedimethanol (CHDM) or neopentyl glycol (NPG). It is a polycondensation product of terephthalic acid (TPA), ethylene glycol (EG) and CHDM / NPG three monomers by the transesterification method. Compared with PET, it has more CHDM / NPG comonomers and has its uniqueness. With the increase of the comonomer CHDM / NPG, the melting point decreased, the glass transition temperature increased, the crystallinity decreased, and finally an amorphous polymer was formed. Generally, 30-40 parts of CHDM in PETG (Polyethylene terephthalateco-1,4-cylclohexylenedimethylene terephthalate) is suitable, and the content of CHDM in PCTG is more than 50%. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J3/22C08L67/02C08L23/08C08L85/02C08K5/00C08K5/5313C08K5/09C08K5/353C08K5/526C08K5/29
CPCC08J9/122C08J9/0061C08J9/0038C08J9/0023C08J9/0028C08J3/226C08J2203/08C08J2203/06C08J2367/02C08J2423/08C08J2485/02
Inventor 施文照柳祚龙韦景然
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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