Phenolic resin prepreg and method for preparing phenolic composite material from same

A technology of phenolic resin and composite material, which is used in the preparation of phenolic resin prepreg, the manufacture of phenolic composite material from prepreg, and the field of phenolic resin prepreg, which can solve the problem of gas is not easily discharged, material waste environment, and uneven resin content. and other problems, to achieve the effect of avoiding the decline of flame retardant performance, high product quality and small number of micropores

Active Publication Date: 2017-12-08
陈精明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of the glue-absorbing material is also high, and the glue-absorbing process must be within a specific temperature range. The fluidity of the resin should not be too large, otherwise the resin will be extracted too much; the fluidity of the resin should not be too small, otherwise the gas will not be easily discharged completely. ; This requires that the viscosity-temperature performance of the prepreg is extremely stable, so the control of the glue-absorbing process is very difficult
More importantly, since the phenolic prepreg will release water when it is cured, the moisture will usually bring out a certain amount of resin when it is drawn out in the form of water vapor through the adhesive layer, resulting in uneven resin content and material waste and environmental pollution

Method used

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  • Phenolic resin prepreg and method for preparing phenolic composite material from same
  • Phenolic resin prepreg and method for preparing phenolic composite material from same

Examples

Experimental program
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Effect test

Embodiment 1）

[0042] The phenolic resin prepreg of this embodiment includes the following components in parts by weight: 58 parts of fiber fabric, 39 parts of phenolic resin, 2 parts of thickener, and 1 part of curing accelerator.

[0043] Fiber fabric in the present embodiment is 800g / m 2 Biaxial fabric.

[0044] The phenolic resin is a resole phenolic resin, the catalyst for its synthesis reaction is sodium hydroxide, and its viscosity is 300-1500 mPa·s (900 mPa·s in this embodiment).

[0045] The thickener is one or more compositions of magnesium oxide, calcium oxide, calcium sulfate, nano-scale aluminum hydroxide, white carbon black, boric acid, zinc borate, and the thickener in this embodiment is sulfuric acid calcium.

[0046] The curing accelerator is one or more combinations of imidazolidine, triazine, oxazolidine, oxazine, imidazolidine-oxazolidine hybrids, etherified resorcinol, and strong acid esters things.

[0047] The strong acid esterification product in the curing accele...

Embodiment 2）

[0053] The rest of the phenolic resin prepreg of this embodiment is the same as that of Embodiment 1, except that it also includes 2 parts of toughening agent, which is polyurethane prepolymer.

[0054] In addition to the aforementioned polyurethane prepolymer, the toughening agent can also be one of methoxysiloxane, polyvinyl alcohol, hydroxyl-terminated polybutadiene, and carboxyl-terminated polybutadiene.

Embodiment 3）

[0056] The phenolic resin prepreg of this embodiment consists of the following components in parts by weight: 55 parts of fiber fabric, 42 parts of phenolic resin, 3 parts of thickener, and 2 parts of curing accelerator.

[0057] Among them, the fiber fabric is 200g / m 2 Fiberglass satin weave.

[0058] The phenolic resin is a resole phenolic resin synthesized by catalyzing barium hydroxide with a viscosity of 1200mPa·s.

[0059] The thickener is boric acid.

[0060] The curing accelerator is the esterification of polyphosphoric acid and trimethylolpropane and oxazolidine.

[0061] The preparation method of the phenolic resin prepreg of the present embodiment all the other are identical with embodiment 1, difference is:

[0062] Step ② The temperature of the resin tank is controlled at 65°C.

[0063] Step ③ The temperature of the thickening oven is 90°C, and the time for the impregnated fabric to pass through the thickening oven is 1 hour.

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Abstract

The invention discloses a phenolic resin prepreg and a method for preparing a phenolic composite material from the phenolic resin prepreg. The prepreg comprises the following components by weight: 50 to 65 parts of a fabric, 20 to 48 parts of phenolic resin and 1 to 5 parts of a thickening agent. A vacuum bag molding and curing process is employed for preparation of the phenolic composite material from the phenolic resin prepreg. A microporous membrane is adopted in the process, and the microporous membrane has a micropore diameter of 0.1 to 10 [mu]m, a thickness of between 2 to 300 [mu]m and porosity of 50% to 80%; since the micropore diameter is tens of thousands of times the diameter of a liquid molecule and is several hundred times smaller than the diameter of a water droplet, the microporous membrane has excellent moisture permeability, air permeability and droplet permeation resitance, so volatile gas is drawn out while liquid resin components are not drawn out during vacuum pumping; and thus, the problem of nonuniform distribution of resin caused by drawing-out of resin is avoided, and wasting of materials and the amount of produced waste are reduced.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a phenolic resin prepreg, a preparation method of the phenolic resin prepreg and a method for manufacturing a phenolic composite material from the prepreg. Background technique [0002] Phenolic resin is the first commercially used artificial resin in human history, because it has good heat resistance, flame retardancy, corrosion resistance (except oxidizing acid and alkali), high temperature creep resistance, and has been used so far. A wide range of applications, such as for the preparation of various heat-resistant products, anti-corrosion materials, flame-retardant materials, etc. [0003] After the phenolic resin is cured, the molecular structure of the aromatic ring is dense, and it is easy to form a dense charcoal layer when it encounters high-heat combustion, which slows down the intrusion of heat into the interior of the material and also isolates...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L75/04C08L47/00C08L29/04C08K13/02C08K3/30C08K13/04C08K7/14C08K3/38C08K7/06C08K3/22C08K3/36C08K5/5415C08J5/24B32B5/02B32B27/40B32B27/32B32B27/12B32B25/20B32B25/10B32B27/08B32B25/08B32B3/24B32B27/04B32B17/04B32B17/12B32B9/00B32B9/04B32B5/26B32B3/12B32B5/18B32B5/24B32B21/10B32B3/08B32B37/06B32B37/10
CPCB32B3/08B32B3/12B32B3/266B32B5/024B32B5/18B32B5/245B32B5/26B32B21/10B32B25/08B32B25/10B32B25/20B32B27/08B32B27/12B32B27/32B32B27/322B32B27/40B32B37/06B32B37/1018B32B2260/021B32B2260/046B32B2262/101B32B2262/106B32B2307/724B32B2307/7265C08J5/24C08J2361/06C08K3/22C08K3/30C08K3/36C08K3/38C08K5/5415C08K7/06C08K7/14C08K13/02C08K13/04C08K2003/222C08K2003/2227C08K2003/3045C08K2003/387C08L61/06C08L75/04C08L29/04C08L47/00
Inventor 陈精明
Owner 陈精明
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