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Polybutylene terephthalate flame-proof modified material and its preparation method

A technology for polybutylene terephthalate and modified materials, which is applied in the field of polybutylene terephthalate flame-retardant modified materials and its preparation, and can solve the problem of red phosphorus having a pungent smell and difficulty in expanding Application range, mold damage and other problems, to achieve the effect of reducing the content of added powder, reducing costs and smooth production

Inactive Publication Date: 2007-07-11
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although red phosphorus has been used as a halogen-free flame retardant base material at present, due to the limitation of the color of red phosphorus itself, it can only be used as a flame retardant material for red, dark or black products, and it is difficult to expand its application range
Moreover, red phosphorus has a pungent smell, and long-term use will cause damage or corrosion to machinery and molds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 (by weight percentage, following embodiment is identical)

[0037] Pre-mix PBT53.6, nitrogen-phosphorus flame retardant 12, plasticizer 4, slip agent 0.15, and antioxidant 0.25 in a mixing tank for 4 minutes, then extrude and granulate through twin-screw, and add long glass fiber 30 at the same time. The processing temperature is 225-230℃ in the first zone, 225-230℃ in the second zone, 230-235℃ in the third zone, 230-240℃ in the fourth zone, 230-240℃ in the fifth zone, 225-235℃ in the sixth zone, and 220 in the seventh zone. -230°C.

Embodiment 2

[0039] Pre-mix PBT49.6, nitrogen-phosphorus flame retardant 16, plasticizer 4, slip agent 0.15, and antioxidant 0.25 in a mixing tank for 4 minutes, then extrude through twin-screws to granulate, and add long glass fiber 30 at the same time. The processing temperature is 225-230℃ in the first zone, 225-230℃ in the second zone, 230-235℃ in the third zone, 230-240℃ in the fourth zone, 230-240℃ in the fifth zone, 225-235℃ in the sixth zone, and 220 in the seventh zone. -230°C.

Embodiment 3

[0041] Pre-mix PBT47.7, nitrogen-phosphorus flame retardant 18, plasticizer 4, slip agent 0.15, and antioxidant 0.25 in a mixing tank for 6 minutes, then extrude through twin-screws to granulate, and add long glass fiber 30 at the same time. The processing temperature is 225-230℃ in the first zone, 225-230℃ in the second zone, 230-235℃ in the third zone, 230-240℃ in the fourth zone, 230-240℃ in the fifth zone, 225-235℃ in the sixth zone, and 220 in the seventh zone. -230°C.

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Abstract

The invention discloses a polyterephthalic acid butanediol ester flame-proof modified material, which comprises the following parts: 45-53% polyterephthalic acid butanediol ester, 12-18% nitrogen-phosphorus flame-proof agent, 28-32% long glass fiber, 0.1-0.2% lubrication prescription, 0.1-0.3% antioxidant and 3-6% plasticizer.

Description

[technical field] [0001] The invention relates to a flame-retardant modified polybutylene terephthalate (PBT) material and a preparation method thereof. [Background technique] [0002] At present, most of the domestically produced polybutylene terephthalate (PBT) flame-retardant modified series materials use halogen or halogen-friendly environmental protection series as flame-retardant base materials. The specific brominated flame retardants are brominated epoxy resin, Brominated polystyrene, decabromodiphenylethane, decabromodiphenyl ether, etc. The addition content of this kind of flame retardant is 12-18%, and with 1 / 3 antimony trioxide (Sb203), the material made has a base color, is not easy to color, and contains relatively thick smoke when burning, and is mixed with It has a pungent odor, and the dispersant will pollute the surrounding environment. And because this type of material contains more powder (the total content of bromine and Sb2O3 occupies 12-24%), the tou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/03C08K7/14B29C47/92B29C47/40C08K5/524C08K5/3492C08K5/09C08L51/00B29C48/92
Inventor 徐东贺永王贤文
Owner SHENZHEN KEJU NEW MATERIAL
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