CN104845077A - Flame-retardant and modified PBT composite material and preparation method thereof - Google Patents

Abstract

The present invention discloses a flame-retardant and modified PBT composite material and a preparation method thereof, wherein the flame-retardant and modified PBT composite material comprises, by mass, 60-80% of PBT, 5-15% of glass fibers, 8-15% of a flame retardant agent, 3-8% of an ethylene-octene copolymer POE, 0.5-2% of an anti-aging agent, 0.1-0.5% of an antioxidant, and 0.1-1% of modified ethylene bis fatty acid amide TAF. The flame-retardant and modified PBT composite material of the present invention has beneficial effects of excellent flame retardant property, excellent aging resistance, high tensile strength, high impact resistance toughness, low warping, stable performance, excellent electrical property, excellent processability, good heat resistance, good corrosion resistance, simple preparation process, easy operation, and low cost, and has good use effects and wide prospects in the fields of chemical industry, machinery, electronics, electrical appliances, building materials and the like.

Description

A kind of flame-retardant modified PBT composite and preparation method thereof

Technical field

The present invention relates to technical field of polymer materials, specifically a kind of flame-retardant modified PBT composite and preparation method thereof.

Background technology

PBT(polybutylene terephthalate) be a kind of traditional hemicrystalline engineering plastics, it has high degree of crystallinity and crystallization rate, good chemical proofing, high thermotolerance and excellent processibility and electrical property, has been widely used in the fields such as electronics, electrical equipment, household electrical appliances, chemical industry, machinery at present.But pure PBT exists the shortcoming such as easily burning, notched Izod impact strength difference, limit its application in some field.

Summary of the invention

The object of the present invention is to provide good, the fire-retardant efficient and flame-retardant modified PBT composite that ageing resistance is excellent of a kind of mechanical property.

The technical solution adopted for the present invention to solve the technical problems is: a kind of flame-retardant modified PBT composite, and its component by mass percent proportioning is: PBT 60% ~ 80%, glass fibre 5% ~ 15%, fire retardant 8% ~ 15%, ethylene-octene copolymer POE 3% ~ 8%, antiaging agent 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 0.5%, modification ethylene bis-fatty acid amides TAF 0.1% ~ 1%.

Described PBT is polybutylene terephthalate, and its limiting viscosity is 0.85 ~ 1.25dl/g.

Described glass fibre be diameter at 8 ~ 15 μm and surface through the alkali-free short glass fiber of silane coupling agent process.

Described fire retardant is the mixture of one or more in dihydroxyphenyl propane-bis-(diphenyl phosphoester), the two idol-diphenyl phosphate of Resorcinol, bisphosphate diphenyl pentaerythritol, triphenylphosphate, red phosphor masterbatch.

Described antiaging agent is the compound that hindered amine high molecular photostabilizer HS-944 and the HS-622 of mass ratio 1:1 forms.

Described oxidation inhibitor is the compound that the Hinered phenols antioxidant 1076 of mass ratio 1:2 forms with phosphite ester kind antioxidant 168.

The preparation method of a kind of flame-retardant modified PBT composite of the present invention, comprises the following steps:

(1), by PBT at 120 DEG C ~ 140 DEG C dry 4 ~ 6 hours, fire retardant at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by;

(2), take step (1) by mass percent proportioning and obtain dry PBT and fire retardant, add in super mixer, add the ethylene-octene copolymer POE, antiaging agent, oxidation inhibitor, the modification ethylene bis-fatty acid amides TAF that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(3) compound, by step (2) obtained and the main spout and the side spout that add twin screw extruder by the glass fibre that mass percent proportioning takes respectively, by extruding after abundant melting, and after cooling, granulation, drying, namely obtain the present invention.

The invention has the beneficial effects as follows, the present invention has excellent flame retardant properties and ageing resistance, and tensile strength is high, toughness is good, and warpage is little, stable performance, electrical property and processing characteristics are excellent, and heat-and corrosion-resistant performance is good, the simple and easy handling of preparation technology, cost is low, has good result of use and bright prospects in fields such as chemical industry, machinery, electronics, electrical equipment, building materials.

Embodiment

Technical scheme of the present invention is further illustrated below in conjunction with specific embodiment.

Embodiment 1:

A kind of flame-retardant modified PBT composite, its component by mass percent proportioning is: PBT 60%, glass fibre 15%, dihydroxyphenyl propane-bis-(diphenyl phosphoester) 15%, ethylene-octene copolymer POE 8%, antiaging agent 1%, oxidation inhibitor 0.3%, modification ethylene bis-fatty acid amides TAF 0.7%.Wherein, described PBT is polybutylene terephthalate, and its limiting viscosity is 0.85 ~ 1.25dl/g; Described glass fibre be diameter at 8 ~ 15 μm and surface through the alkali-free short glass fiber of silane coupling agent process; Described antiaging agent is the compound that hindered amine high molecular photostabilizer HS-944 and the HS-622 of mass ratio 1:1 forms; Described oxidation inhibitor is the compound that the Hinered phenols antioxidant 1076 of mass ratio 1:2 forms with phosphite ester kind antioxidant 168.

Its preparation method is: (1), by PBT at 120 DEG C ~ 140 DEG C dry 4 ~ 6 hours, dihydroxyphenyl propane-bis-(diphenyl phosphoester) at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by; (2), take step (1) by mass percent proportioning and obtain dry PBT and dihydroxyphenyl propane-bis-(diphenyl phosphoester), add in super mixer, add the ethylene-octene copolymer POE, antiaging agent, oxidation inhibitor, the modification ethylene bis-fatty acid amides TAF that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging; (3) compound, by step (2) obtained and the main spout and the side spout that add twin screw extruder by the glass fibre that mass percent proportioning takes respectively, by extruding after abundant melting, and after cooling, granulation, drying, namely obtain the present invention.

Embodiment 2:

A kind of flame-retardant modified PBT composite, its component by mass percent proportioning is: PBT 75%, glass fibre 10%, Resorcinol two idol-diphenyl phosphate 8%, ethylene-octene copolymer POE 4%, antiaging agent 1.8%, oxidation inhibitor 0.3%, modification ethylene bis-fatty acid amides TAF 0.9%.Wherein, described PBT is polybutylene terephthalate, and its limiting viscosity is 0.85 ~ 1.25dl/g; Described glass fibre be diameter at 8 ~ 15 μm and surface through the alkali-free short glass fiber of silane coupling agent process; Described antiaging agent is the compound that hindered amine high molecular photostabilizer HS-944 and the HS-622 of mass ratio 1:1 forms; Described oxidation inhibitor is the compound that the Hinered phenols antioxidant 1076 of mass ratio 1:2 forms with phosphite ester kind antioxidant 168.

Its preparation method is: (1), by PBT at 120 DEG C ~ 140 DEG C dry 4 ~ 6 hours, the drying 30 ~ 45 minutes at 60 DEG C ~ 80 DEG C of the two idol-diphenyl phosphate of Resorcinol, stand-by; (2), take step (1) by mass percent proportioning and obtain dry PBT and the two idol-diphenyl phosphate of Resorcinol, add in super mixer, add the ethylene-octene copolymer POE, antiaging agent, oxidation inhibitor, the modification ethylene bis-fatty acid amides TAF that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging; (3) compound, by step (2) obtained and the main spout and the side spout that add twin screw extruder by the glass fibre that mass percent proportioning takes respectively, by extruding after abundant melting, and after cooling, granulation, drying, namely obtain the present invention.

Claims (6)

1. a flame-retardant modified PBT composite, it is characterized in that, its component by mass percent proportioning is: PBT 60% ~ 80%, glass fibre 5% ~ 15%, fire retardant 8% ~ 15%, ethylene-octene copolymer POE 3% ~ 8%, antiaging agent 0.5% ~ 2%, oxidation inhibitor 0.1% ~ 0.5%, modification ethylene bis-fatty acid amides TAF 0.1% ~ 1%.

2. the flame-retardant modified PBT composite of one according to claim 1, is characterized in that, described glass fibre be diameter at 8 ~ 15 μm and surface through the alkali-free short glass fiber of silane coupling agent process.

3. the flame-retardant modified PBT composite of one according to claim 1, it is characterized in that, described fire retardant is the mixture of one or more in dihydroxyphenyl propane-bis-(diphenyl phosphoester), the two idol-diphenyl phosphate of Resorcinol, bisphosphate diphenyl pentaerythritol, triphenylphosphate, red phosphor masterbatch.

4. the flame-retardant modified PBT composite of one according to claim 1, is characterized in that, described antiaging agent is the compound that hindered amine high molecular photostabilizer HS-944 and the HS-622 of mass ratio 1:1 forms.

5. the flame-retardant modified PBT composite of one according to claim 1, is characterized in that, described oxidation inhibitor is the compound that the Hinered phenols antioxidant 1076 of mass ratio 1:2 forms with phosphite ester kind antioxidant 168.

6. the preparation method of a kind of flame-retardant modified PBT composite according to claim 1, is characterized in that, comprise the following steps:

(1), by PBT at 120 DEG C ~ 140 DEG C dry 4 ~ 6 hours, fire retardant at 60 DEG C ~ 80 DEG C dry 30 ~ 45 minutes, stand-by;

(2), take step (1) by mass percent proportioning and obtain dry PBT and fire retardant, add in super mixer, add the ethylene-octene copolymer POE, antiaging agent, oxidation inhibitor, the modification ethylene bis-fatty acid amides TAF that take by mass percent proportioning simultaneously, make to stir 3 ~ 15 minutes together, after fully mixing, discharging;

(3) compound, by step (2) obtained and the main spout and the side spout that add twin screw extruder by the glass fibre that mass percent proportioning takes respectively, by extruding after abundant melting, and after cooling, granulation, drying, namely obtain the present invention.