Preparation methods of SiO2 nano particle modified expandable graphite and flame retardant polypropylene
A flame-retardant polypropylene and expanded graphite technology, which is applied in the field of expandable graphite modification technology and the preparation of flame-retardant polypropylene, can solve the problem of poor compatibility between expandable graphite and a polymer matrix, and deterioration of the mechanical properties of the polymer matrix. , the carbon layer structure is easy to fall off, etc., to achieve the effect of inhibiting the popcorn effect, inhibiting thermal decomposition and thermal stability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0030] A SiO 2 A preparation method for nanoparticle modified expandable graphite, comprising the following steps:
[0031] Step 1: Add 100g of expandable graphite of 50 meshes to 240mL of ethanol aqueous solution with a water-alcohol volume ratio of 1:5; disperse through an ultrasonic instrument for about 10 minutes, and then add it to a 250mL container with a reflux condensing device, a thermometer and a stirrer In a three-necked flask; the three-necked flask is heated while stirring in a water bath, heated to 45°C, slowly dripping ammonia water with a rubber dropper to adjust the pH of the solution to 8-9, and an expandable graphite suspension is obtained.
[0032] Step 2: Slowly add 5mL of tetraethyl orthosilicate dropwise to the expandable graphite suspension obtained in step 1 with a rubber dropper, and stir evenly under the conditions of stirring temperature of 45°C and stirring speed of 350r / min Reaction 6h.
[0033] Step 3: After the reaction in step 2 is complete, ...
Embodiment 2
[0037] A SiO 2 A preparation method for nanoparticle modified expandable graphite, comprising the following steps:
[0038] Step 1: Add 150g of expandable graphite of 50 meshes to 300mL of ethanol aqueous solution formed with a water-alcohol volume ratio of 1:5; disperse through an ultrasonic instrument for about 20 minutes, and then add it to a 250mL container with a reflux condensing device, a thermometer and a stirrer In a three-necked flask; the three-necked flask is heated while stirring in a water bath, heated to 40°C, slowly dripping ammonia water with a rubber dropper to adjust the pH of the solution to 7-8, and an expandable graphite suspension is obtained.
[0039] Step 2: Slowly add 8mL of tetraethyl orthosilicate dropwise to the expandable graphite suspension obtained in step 1 with a rubber dropper, and stir evenly under the condition of stirring temperature of 40°C and stirring speed of 350r / min Reaction 8h.
[0040] Step 3: After the reaction in step 2 is comp...
Embodiment 3
[0044] A SiO 2 A preparation method for nanoparticle modified expandable graphite, comprising the following steps:
[0045] Step 1: Add 150g of expandable graphite of 50 meshes to 300mL of ethanol aqueous solution with a water-alcohol volume ratio of 1:5; disperse through an ultrasonic instrument for about 30 minutes, and then add it to a 250mL container with a reflux condensing device, a thermometer and a stirrer In a three-necked flask; the three-necked flask is heated while stirring in a water bath, heated to 45°C, slowly dripping ammonia water with a rubber dropper to adjust the pH of the solution to 8-9, and an expandable graphite suspension is obtained.
[0046] Step 2: Divide 8mL of tetraethyl orthosilicate into four parts, and slowly add one part of tetraethyl orthosilicate to the expandable graphite suspension obtained in step 1 at regular intervals; Before the second dropwise addition, adjust the pH to 8-9 until the addition is complete. Under the condition of stirr...
PUM
Property | Measurement | Unit |
---|---|---|
oxygen index | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com