Nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastic and preparation method thereof

A technology of polyhydroxybutyrate and nano-bentonite, which is applied in the field of nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastics and its preparation, can solve the problems of limited application, impact on physical and mechanical properties, and small impact on mechanical properties. The preparation process is simple, the effect of eliminating adverse effects and reducing effects

Inactive Publication Date: 2014-11-05
江苏嘉铂新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This shortcoming limits its application in various fields
At present, the flame retardants of petrochemical resins mainly include halogen series (chlorine, bromine, etc.), phosphorus series (phosphide, phosphate, etc.), nitrogen series (dicyandiamide, guanidine salt, etc.), silicon series (silicon resin, Silicone rubber, etc.), inorganic salt flame retardants (magnesium hydroxide, aluminum hydroxide, etc.) The physical and mechanical properties make it significantly lower
Therefore, considering the environmental protection of combustion and the influence of various flame retardants on the physical and mechanical properties of plastic materials, there is currently no environmentally friendly flame retardant method that has high flame retardant efficiency and little impact on the mechanical properties of polyhydroxybutyrate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Recipe: 5000g molecular weight 1.0x10 5 Polyhydroxybutyrate, 1000g polyglycolide, 800g nano-bentonite (particle size 1-100nm), 800g magnesium hydroxide, 50g titanate and 50g aluminate, 50g methyl silicone oil, 50g maleic anhydride branch compatibilizer.

[0034] Preparation:

[0035] Step 1: The molecular weight of 5000g is 1.0×10 5 Polyhydroxybutyrate, 1000g polyglycolide, 800g nano-bentonite, 800g magnesium hydroxide at 85 o C dried for 2 hours;

[0036] Step 2: Mix the dried material with 50g titanate and 50g aluminate in a high-speed mixer at 90 o C. Stir and activate at 1400rpm for 10 minutes;

[0037] Step 3: Mix the mixture obtained in steps 1 and 2 with 50g of methyl silicone oil and 50g of maleic anhydride graft compatibilizer in a low-speed mixer;

[0038] Step 4: Melt and extrude all the components obtained in Step 3 through a twin-screw extruder, then cool, air-dry and pelletize. The temperature settings of the twin-screw extruder are as follows: feed...

Embodiment 2

[0041] Formula: 5000g molecular weight is 3.0×10 5 Polyhydroxybutyrate, 1000g polypropylene carbonate, 1000g polyglycolide, 800g nano-bentonite (particle size 1-100nm), 800g aluminum hydroxide, 100g aluminate, 50g polyethylene wax, 100g methyl Methyl acrylate.

[0042] Preparation:

[0043] Step 1: 5000g molecular weight is 3.0×10 5 Polyhydroxybutyrate, 1000g polypropylene carbonate, 1000g polyglycolide, 800g nano-bentonite, 800g aluminum hydroxide at 85 o C dried for 2 hours;

[0044] Step 2: Put the dried material and 100g of aluminate in a high-speed mixer at 90 o C. Stir and activate at 1400rpm for 10 minutes;

[0045] Step 3: Mix the mixture obtained in steps 1 and 2 with 50g polyethylene wax and 100g methyl methacrylate in a low-speed mixer;

[0046] Step 4: Melt and extrude all the components obtained in Step 3 through a twin-screw extruder, then cool, air-dry and pelletize. The temperature settings of the twin-screw extruder are as follows: feeding section 160-170...

Embodiment 3

[0049] Formula: 5000g molecular weight 2.0×10 5 Polyhydroxybutyrate, 1000g polyglycolide, 800g nano-bentonite (particle size 1-100nm), 400g calcium hydroxide, 400g sodium borate, 50g titanate and 50g aluminate, 50g methyl silicone oil, 50g Maleic anhydride graft compatibilizer.

[0050] Preparation:

[0051] Step 1: 5000g molecular weight is 2.0×10 5 Polyhydroxybutyrate, 1000g polyglycolide, 800g nano-bentonite, 400g calcium hydroxide, 400g sodium borate at 85 o C dried for 2 hours;

[0052] Step 2: Mix the dried material and 100g of titanate in a high-speed mixer at 90 o C. Stir and activate at 1400rpm for 10 minutes;

[0053] Step 3: Mix the mixture obtained in steps 1 and 2 with 60g of BASF B225, 50g of ultraviolet absorber BASF UV-326, 50g of methyl silicone oil, and 50g of maleic anhydride graft compatibilizer in a low-speed mixer;

[0054] Step 4: Melt and extrude all the components obtained in Step 3 through a twin-screw extruder, then cool, air-dry and pelletize....

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Abstract

The invention discloses a nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastic and a preparation method thereof. The nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastic comprises, by weight, 50-85% of polyhydroxybutyrate, 5-30% of a nano-bentonite composite flame-retardant, 0.1-5% of a processing assistant, 5-25% of degradable toughened resin, 0.1-5% of a coupling agent and 0.1-5% of a grafting agent. The preparation method comprises the following steps of drying the polyhydroxybutyrate, degradable toughened resin and nano-bentonite composite flame-retardant, adding the coupling agent into the above materials, carrying out activation by a high-rate mixer, mixing the mixture with the processing assistant and the grafting agent to obtain a uniform mixture, carrying out fusion extrusion by a double screw extruder and carrying out cooling, air-drying and grain-sized dicing. The nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastic satisfies flame retardation standard of UL94V-0 level and retains mechanical properties and processing performances.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a nano-bentonite composite flame-retardant polyhydroxybutyrate bioplastic and a preparation method thereof. Background technique [0002] In today's situation where oil resources are increasingly scarce and environmental protection pressure is increasing, various resin products based on oil are likely to be replaced by bioplastics based on natural biomass such as starch. At present, the bioplastics developed by various countries are mainly concentrated in these varieties: polylactic acid (PLA), polyhydroxyalkanoate (PHA), and polyglycolic acid (PGA). Raw material biomass mainly comes from corn, potatoes, sugar cane, grains, wood, oil and so on. Polyhydroxybutyrate (polyhydroxybutyrate, PHB) is a polyhydroxyalkanoate, which was first isolated from cells in 1927. This material is non-toxic and biodegradable. At present, its main use is to produce thermal inje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08L67/02C08K13/02C08K3/34C08K3/22C08K3/38C08F291/06B29C47/92B29C48/92
Inventor 周子凯赵醒夏俊
Owner 江苏嘉铂新材料有限公司
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