Manometer layered silicate clay modified phenolic resin and preparation method thereof

A silicate clay, nano-layered technology, applied in the field of thermosetting phenolic resin and its preparation, to achieve the effects of good fatigue resistance, increased interlayer spacing, and good compatibility

Active Publication Date: 2015-02-18
陈精明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flame retardant phenolic resin prepared by the above process is a thermoplastic phenolic resin, which is not suitable for making composite materials under low temperature conditions

Method used

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  • Manometer layered silicate clay modified phenolic resin and preparation method thereof
  • Manometer layered silicate clay modified phenolic resin and preparation method thereof
  • Manometer layered silicate clay modified phenolic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0049] The preparation method of the phenolic resin modified by the nano-layered silicate clay of the present embodiment may further comprise the steps:

[0050] ① Organic modification of nano-layered silicate clay. The nano-layered silicate clay used in this example is montmorillonite. Take 100 grams of commercial 200-mesh montmorillonite soil, add it to 1 L of sulfuric acid solution, the concentration of sulfuric acid solution is 25-35% (30% in this example); heat to boiling and reflux for 15 minutes, then cool and centrifuge Filter, wash with pure water until neutral, dry in vacuum at 95°C for 4 hours, pulverize, pass through a 200-mesh sieve, and take the sieved acidified montmorillonite for further processing.

[0051] Take 100 grams of the acidified montmorillonite prepared above and add it to 1L of aqueous ethanol, the concentration of the aqueous ethanol is 45% to 55% (50% in this example); then add the modifier octadecane to the aqueous ethanol Trimethylammonium chl...

Embodiment 2）

[0079] All the other preparation methods of the phenolic resin modified by the nano-layered silicate clay of the present embodiment are the same as in Example 1, except that:

[0080] Step ③ Add 1kg of modified phenol prepared in step ②, 1.035kg of 37% formaldehyde solution, 25g of 30% sodium hydroxide aqueous solution to the 2L flask in turn and stir evenly, then slowly heat up the materials in the flask to 80°C within 1.5h ℃, after 3 hours of reaction at 80 ℃, the reaction is completed, vacuum dehydration in the range of 50 ℃ ~ 65 ℃, the viscosity of the material is 800 cps, and the nano-montmorillonite modified phenolic resin is obtained.

[0081] According to the method of Example 1, the phenolic resin of this example is made into a composite material flat plate, and the reaction to fire is detected to be stable, the surface of the flat plate does not bubble, explode, deform, and the cross-section is not delaminated; the flame spread detection, BS476.6 reaches Grade 0, BS4...

Embodiment 3）

[0083] All the other preparation methods of the phenolic resin modified by the nano-layered silicate clay of the present embodiment are the same as in Example 1, except that:

[0084] Step ① The clay used in the organic modification of nano-layered silicate clay is nano-rectorite. The particle size of organic nano-rectorite is 200 mesh, and the specific surface area is 200-270m 2 / g, the average thickness of the wafer layer is less than 2.5nm, and the interlayer distance is 2.0nm.

[0085] In step ②, when preparing the modified phenol, organic nano-rectorite is used.

[0086] Step 3. Add 500 g of modified phenol and 400 g of hot-melt pure phenol prepared in step 2 into a 2L flask, add 25 g of 30% aqueous sodium hydroxide solution, stir evenly, and add 400 g of industrial grade paraformaldehyde (content 96 %), stir again and then slowly raise the temperature to 80°C, react at 80°C for 3 hours, add an appropriate amount of water to adjust the product viscosity to 800cps, and o...

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Abstract

The invention discloses a preparation method of a nanometer layered silicate clay modified phenolic resin. The preparation method comprises the following steps: (1) performing organic modification on the nanometer layered silicate clay; (2) preparing modified phenol; (3) adding the modified phenol prepared in the step (2), methyl aldehyde and a basic catalyst into a reactor, uniformly stirring, warming to begin reaction, after the reaction is finished, according to the viscosity of materials, replenishing water or performing vacuum dewatering, so as to enable the viscosity of the materials to reach 300-3000 cps to obtain the nanometer clay modified phenolic resin. According to the invention, the nanometer layered silicate clay is adopted to modify the phenolic resin, and a composite material manufactured and formed after the phenolic resin and a corresponding acid curing agent are compounded with fiber materials, and cured at 25-80 DEG C is stable in reaction to fire, has excellent F / S / T performance, reaches 1a level of a BS6853 test, and also has excellent performance such as high mechanical strength, fatigue durability, heat resistance and strong acid corrosion resistance.

Description

technical field [0001] The invention relates to a thermosetting phenolic resin and a preparation method thereof, in particular to a nano-layered silicate clay-modified phenolic resin which can be cured at low temperature to obtain composite material products with excellent flame retardancy and a preparation method thereof. Background technique [0002] In recent years, fiber-reinforced thermosetting resin-based composites (FRP, commonly known as FRP) have replaced metal materials and have developed rapidly in many industries. Fiber-reinforced thermosetting resin-based composites are composed of reinforcing materials and thermosetting resins. The reinforcing materials used include glass fiber, carbon fiber, aramid fiber, polyester fiber and their fabrics, such as square cloth, twill cloth, chopped strand mat, continuous mat , stitch-bonded composite felt, sandwich stitch-bonded composite felt, warp knitted fabric, unidirectional fabric, multiaxial fabric, 3D fabric, etc.; res...

Claims

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Application Information

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IPC IPC(8): C08G8/10C08G8/24C08K9/04C08K3/34
Inventor 陈精明
Owner 陈精明
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