Fiber-reinforced phenolic resin-based composite material and preparation method thereof

A phenolic resin and composite material technology, which is applied in the field of new phenolic resin composite materials, can solve the problems that the resin mixture cannot be applied to the glass fiber reinforced plastic molding process, and is inconvenient for acid catalyst curing, etc., and achieves high mechanical strength, good fatigue resistance, and delayed decomposition.

Active Publication Date: 2015-03-04
陈精明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The phenolic resin molding material of this composition is to mix phenolic resin with flame retardant, organic filler and other additives, melt and knead it through a heating roller, take it out and pulverize it into granules to form a molding material; The composite material made of raw materials brings alkaline substances into it, which brings the problem that it is not convenient to use acid catalyst for curing; at the same time, the solid resin mixture cannot be applied to the simple FRP molding process

Method used

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  • Fiber-reinforced phenolic resin-based composite material and preparation method thereof
  • Fiber-reinforced phenolic resin-based composite material and preparation method thereof
  • Fiber-reinforced phenolic resin-based composite material and preparation method thereof

Examples

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Effect test

Embodiment 1）

[0044] The preparation method of the fiber-reinforced phenolic resin-based composite material of this embodiment includes the following steps:

[0045] ①The preparation of phenolic resin includes the following steps:

[0046] (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 original soil and add it to 1L sulfuric acid solution. The sulfuric acid solution has a concentration of 25% to 35% (30% in this example); heat it to boiling and reflux for 15 minutes, then cool it. Centrifugal filtration, washing with pure water to neutrality, vacuum drying at 95°C for 4 hours, crushing, passing through a 200-mesh sieve, and taking the sieved acidified montmorillonite for further processing.

[0047] Take 100 grams of the acidified montmorillonite prepared above and add it to 1L of ethanol aqueous solution, the concentration of the ethanol aqueous solution is 45-5...

Embodiment 2）

[0062] The preparation method of the fiber-reinforced phenolic resin composite material of this embodiment is otherwise the same as that of embodiment 1, except that:

[0063] Step ③When the composite material is molded and cured, weigh 1 kg of the nano-montmorillonite modified phenolic resin prepared in step ①, add 40 g of the curing agent prepared in step ② and 40 g of curing accelerator to it, and stir uniformly to obtain a resin liquid.

[0064] The curing accelerator is an ester, and the acid of the synthetic ester is one of phosphoric acid, polyphosphoric acid, hypophosphorous acid, phosphorous acid, sulfuric acid, benzenesulfonic acid, p-toluenesulfonic acid, xylenesulfonic acid, and phenolsulfonic acid; Synthetic ester alcohols are methanol, ethanol, ethylene glycol, diethylene glycol, triethylene glycol, dipropylene glycol, tripropylene glycol, glycerol, pentaerythritol, benzyl alcohol, benzyl alcohol, trimethylolpropane, phenol Kind of.

[0065] In this example, 1 kg of ph...

Embodiment 3）

[0070] The preparation method of the fiber-reinforced phenolic resin-based composite material of this embodiment is otherwise the same as that of Embodiment 2, except that:

[0071] Step ① During the preparation of phenolic resin, after the reaction is completed, vacuum dehydration until the detected viscosity of the material is 300-350 cps.

[0072] Step ③When the composite material is molded and solidified, weigh 1kg of the nano-montmorillonite modified phenolic resin prepared in Step ①, add 40g of the curing agent prepared in Step ②, 40g accelerator and 5g coupling agent, and stir evenly to obtain a resin liquid . The coupling agent is 3-aminopropyltriethoxysilane.

[0073] When vacuum bag-assisted infusion process is used for molding, the cut surface mat, chopped mat, gingham cloth, felt and cloth are alternately laid on the mold; then auxiliary materials are laid, namely demolding cloth, diversion cloth, resin tube, vacuum For the film, the edge of the vacuum film and the mold...

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Abstract

The invention discloses a fiber-reinforced phenolic resin-based composite material and a preparation method thereof. The preparation method comprises the following steps: firstly preparing phenolic resin modified by nano-clay, preparing an acid curing agent, adding the acid curing agent into the phenolic resin modified by the nano-clay and uniformly stirring to obtain resin liquid; and selecting a fiber reinforcing material, molding in a mold by a molding process, and then curing at low temperature to obtain the fiber-reinforced phenolic resin-based composite material. The fiber-reinforced phenolic resin-based composite material prepared by the preparation method disclosed by the invention is prepared by curing the phenolic resin at normal pressure and low temperature of 25 DEG C-80 DEG C, and the material is stable to a fire reaction and has no phenomena of surface bubbling, deformation, delamination and burst when meeting high heat. The material has excellent F/S/T performance, achieves 1a-grade level of a BS6853 test and further has excellent performances of high mechanical strength, good fatigue resistance, heat resistance, resistance to strong acid corrosion and the like.

Description

Technical field [0001] The invention relates to a new type of phenolic resin composite material, in particular to a fiber-reinforced phenolic resin-based composite material made of nano-layered silicate clay modified phenolic resin with excellent flame retardancy and a preparation method thereof. Background technique [0002] In recent years, fiber-reinforced thermosetting resin-based composite materials (FRP, commonly known as glass fiber reinforced plastics) have replaced metal and wood materials, and have developed rapidly in many industries. Fiber-reinforced thermosetting resin-based composite materials are composed of fiber-reinforced materials and thermosetting resins. The fiber-reinforced materials used are glass fiber, carbon fiber, aramid fiber, polyester fiber and their fabrics, such as checkered cloth, twill cloth, chopped mat, Continuous felt, stitch-knitted composite felt, sandwich stitch-knitted composite felt, warp-knitted cloth, unidirectional cloth, multi-axial c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/10C08L67/00C08L77/10C08L97/02C08J3/24C08G8/10C08K13/06C08K9/04C08K3/34C08K7/14C08K7/06C08K3/32C08K3/38C08K3/22
Inventor 陈精明
Owner 陈精明
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