The composition to obtain a binder for the prepreg, a method of obtaining a binding for prepreg, the prepreg and the product

 

(57) Abstract:

The invention relates to the manufacture of polymer composite materials, working in conditions of high humidity at the drums and alternating loads. The composition to obtain a binder for the prepreg includes apositively resin, low-molecular epoxygenase resin, high-molecular epoxygenase resin, the hardener is dicyandiamide and bis(N,N'-dimethylcarbamyl)difenilmetana mass ratio(50-60):(25-35):(4-10):(3-4):(4: 6) and, perhaps, the solvent is a mixture of aliphatic alcohol and acetone in a weight ratio of 3:5 in the amount of 0-82 wt.h. A method of obtaining a binding for prepreg consists of mixing pre-cooked pasta - crushed to particle size of 3-5 μm mixture of hardeners with part of the molten low molecular weight epoxygenase resin with subsequent combination of pasta with alloy remainder of the low-molecular epoxygenase resin, apositively resin and the high molecular epoxygenase resin and use if necessary solvent. The prepreg contains the specified epoxy binder 30-42 wt.% and fibrous filler 58-70 wt.%. The molding of the prepreg receive the product. the level of technological properties and to improve the water resistance and strength characteristics of the products. 4 C. and 1 C.p. f-crystals, 2 tab.

The invention relates to the field of polymeric materials on the basis of various fibrous fillers and can be used in the manufacture of products, operating at alternating and shock loads in conditions of high humidity, tropical, Maritime climate, in the aircraft, shipbuilding and other industries.

Known epoxy composition for the manufacture of prepregs containing epoxygenase resin, dicyandiamide and 3 (3,4-dichlorophenyl)-1,1-dimethyl urea (application JP 3220225, A1, 27.09.1991).

Carbon fiber impregnated with known composition, allow to obtain prepregs with improved physical-mechanical properties.

However, the materials based prepregs may not be used in conditions of high humidity due to their insufficient high water resistance.

The closest in technical essence to the invention is a binder composition for a prepreg, comprising a low-molecular epoxygenase resin (5-15 wt. h), apositively resin - triglycerol ester of 1,1,3 - three (oxyphenyl) propane (100 wt.h.), the hardener is dicyandiamide (2-4 wt.h.) and bis (N,N'-dimethylcarbamyl) difenilmetana (4-6 wt.h.) and rastvora.lechenie components at a temperature of 58 - 62oC for 2.5 hours (patent SU 1677961, the IPC 29 4 /20, publ. 10.04.1996).

Famous composition impregnated fiberglass or other fibrous fillers, receiving prepregs with improved characteristics.

In the manufacture of prepregs to provide manufacturability (optimal stickiness, elasticity, etc.) in the prepreg retain a certain amount of "volatile" or residual solvent.

The presence of residual solvent causes the formation of pores in the molded products, which reduces the resistance and strength characteristics of composite materials (resistance to impact and alternating loads).

An object of the invention is to provide a composition of the binder makes it possible to reduce or eliminate the solvent content in the prepreg based on it, while maintaining optimal level of technological properties of the prepreg and to improve the water resistance and strength characteristics of composite materials in the products.

This object of the invention is solved by the fact that the proposed composition to obtain a binder for prepregs, including apositively resin - triglycerol ester of 1,1,3 - three(oxygenenriched and, if necessary, solvent - the mixture of aliphatic alcohol and acetone in their mass ratio of 3:5, further comprises a high molecular epoxygenase resin, which is a product of the copolymerization epoxygenase resin with diphenylolpropane in the following ratio, wt.h.:

Amoxicilina resin - 50-60

Low-molecular epoxygenase resin - 25-35

High molecular weight epoxy resin - 4-10

The dicyandiamide - 3 and -4

Bis(N,N'-dimethylcarbamyl) difenilmetana - 4-6

Solvent - 0-82

The technical problem is also solved by a method of obtaining a binding for prepregs, which consists in mixing these components, and the rst mix the hardener is dicyandiamide and bis (N,N'-dimethylcarbamyl) difenilmetana, chop them up finely dispersed state with a particle size of 3-5 μm and injected them into low-molecular epoxygenase resin at a mass ratio of hardener and resin 1:3 mixture fray to form a paste with subsequent combination of pasta with a pre-prepared by melt remaining the low-molecular epoxygenase resin, apositively resin and the high molecular epoxygenase resin and use if necessary solvent.


Epoxy binder - 30-42

Fibrous filler - 58-70

As the fibrous filler are glass, carbon, organic strands, ribbons, fabrics and yarns, and combinations thereof.

According to the invention it is also proposed product obtained by molding the prepregs.

According to the invention using apositively resin (ETF) - triglycerol ester of 1,1,3-three(oxyphenyl) propane (TO-316-09201208-94), epoxygenase resin ED-22 ED-20 and other high-molecular epoxygenase resin grade e-P (TO-1592-76) obtained by copolymerization of epoxygenase resin e-40 (OST6-10-416-76) with diphenylolpropane. The hardener is dicyandiamide (1 cyanoguanidine) (TL6-09-3967-80) and bis (NN'-dimethylcarbamyl) difenilmetana - hardener N 9 (TL6-14-22-159-83).

Upon receipt of the prepreg on the mortar technology used solvent is a mixture of aliphatic alcohol (ethyl, isopropyl) and acetone in their mass ratio of 3:5.

To obtain prepregs and products you can use binder obtained by mixing the components according to the traditional technology.

The invention is illustrated by the following(5 wt. o'clock ) and dicyandiamide (3 wt.h.). The mixture is crushed to fine condition with a particle size of 3-5 microns. The resulting mixture is introduced into a preheated to 50-60oWith epoxygenase resin ED-22 (24 wt.h.). The resulting mixture fray on kratkotrajni car until smooth. The paste can be stored for 6 months. at room temperature.

In a mixer with a propeller stirrer download epoxygenase resin ED-22 (10 wt. h), apositively resin ETF (50 wt.h.) and high-molecular epoxygenase resin grade e-P (8 wt.h.) and stirred until a homogeneous mass (melt) at 140-150oC for 3 h.

The obtained alloy resin filter through a sieve with a mesh size of 0.3 to 0.5 mm Alloy resins (68 wt.h.) loaded into the mixer, heated to 65-75oTo enter cooked pasta (32 wt.h.) and produce mixing of the components within 1.5 hour.

The obtained binder kept in a tightly closed container for 3 months. at room temperature and 1 year at a temperature of 5 to 10oC.

Properties of binders:

Kinematic viscosity at 20oC, MPa (3 - 4) 104< / BR>
Kinematic viscosity at 70oC, MPa (1 to 1.5) 103< / BR>
> the results from the die on a moving paper substrate. Reinforcing fibrous filler is fed to the paper coated with hot-melt binder. All of the tape passes successively through a heated chamber (t = 60-70oC) and calenders, where the formation of the quality of the prepreg.

Properties of the prepreg are shown in table. 1.

Example 2.

Get analogously to example 1 a binder in the form of a melt in the following ratio, wt.h.:

Amoxicilina resin ETF - 58

Epoxygenase resin ED-20 - 26

Epoxygenase resin e-P - 8

The dicyandiamide - 4

Bis NN'-dimethylcarbamyl the difenilmetana - 4

Then the obtained binder dissolved in a mixture of ethanol and acetone, taken in the ratio 3:5, number of 66.7 wt.h.

Properties of binders:

The concentration of the solution,% - 55

Gelling time at T=1222oC, min is Not less than 10

Viability months. - 6

The composition is applied on the reinforcing woven filler by impregnation in the resulting solution.

Properties of the prepreg are shown in table. 1

Example 3.

Analogously to example 2 in the following ratio, wt.h:

Amoxicilina the>/BR>Bis NN'-dimethylcarbamyl the difenilmetana - 5

Then the obtained binder dissolved in a mixture of ethanol and acetone, taken in the ratio 3: 5, in the amount of 82 wt.h.

Properties of binders:

The concentration of the solution,% - 60

Gelling time at T = 1222oS, min, Not less than 10

Viability months. - 6

The composition is applied on the reinforcing filler.

Properties of the prepreg are shown in table. 1.

The invention is not limited to these examples.

The proposed universal binder, i.e. it can be used to obtain a prepreg by mortar and rasplavnoj (spunbond) technology on the basis of various fibrous fillers and their combination (hybrid fillers).

The invention reduces the number of "residual solvents" to the minimum value while maintaining an optimal level of technological properties (stickiness, elasticity) of the prepregs in a long time, which is especially important when laying out large-scale structures.

The use of prepregs allows the formation of billets products by winding, manual and automated calculations. Articles of glass, about the CSOs, vacuum forming and direct pressing.

The resulting composite materials are characterized by high resistance and high strength characteristics, which allows their use for the production of highly loaded structures operating at alternating and shock loads damp conditions (table. 2).

1. The composition to obtain a binder for prepregs, including apositively resin - triglycerol ester of 1,1,3-three(oxyphenyl)propane, low-molecular epoxygenase resin, the hardener is dicyandiamide and bis(N,N'-dimethylcarbamyl)difenilmetana and, if necessary, the solvent is a mixture of aliphatic alcohol and acetone in their mass ratio of 3 : 5, characterized in that it further comprises a high molecular epoxygenase resin, which is a product of copolymerization of low molecular weight epoxygenase resin with diphenylolpropane in the following ratio, wt.h:

Amoxicilina resin - 50 - 60

Low-molecular epoxygenase resin - 25 - 35

High-molecular epoxygenase resin - 4 - 10

The dicyandiamide - 3 - 4

Bis(N,N'-dimethylcarbamyl)difenilmetana - 4 - 6

ASTM, for mixing components of the composition under item 1, and the rst mix the hardener is dicyandiamide and bis(N,N'-dimethylcarbamyl)difenilmetana, chop them up finely dispersed state with a particle size of 3 to 5 μm and injected into low-molecular epoxygenase resin at a mass ratio of hardener and resin 1 : 3 mixture fray to form a paste with subsequent combination of pasta with a pre-prepared by melt remaining the low-molecular epoxygenase resin, apositively resin and the high molecular epoxygenase resin using, if necessary, a solvent.

3. The prepreg obtained on the basis of epoxy resin and a fibrous filler, wherein the binder using a binder based composition under item 1 in the following ratio of components of the drug, wt.%:

Epoxy binder - 30 - 42

Fibrous filler - 58 - 70

4. The prepreg under item 3, characterized in that as the fibrous filler are glass, carbon, organic strands, ribbons, fabrics and yarns, and combinations thereof.

5. The product obtained by molding the prepreg on PP.3 and 4.

 

Same patents:

The invention relates to the production of epoxy composition (binder) used as impregnating solutions (compounds) in the manufacture of fiberglass

The invention relates to structure-painted epoxy polymers, which can find application in the production of colored coatings and optical glasses

The invention relates to polymeric compositions used in nuclear engineering, namely for the conditioning of radioactive waste with high fluence induced activity

The invention relates to woodworking industry, in particular the production of Board materials, and can be used in the manufacture of combustible materials

Polymer composition // 2161169
The invention relates to polymeric compositions based on epoxy resins and is intended for the manufacture of structural glass by the method of wet wound

The invention relates to the manufacture of compositions that can be used for the manufacture of GRP pipes, automotive compressed gas cylinders, tanks for storing liquids for the formation of protective corrosion-resistant coatings and various products made of composite materials

The invention relates to a binder for thermoeconomics powder paints, which is the composition of the polymer capable of interacting with epoxy groups, and a crosslinking agent containing an epoxy group, and to termooinamica powder paints containing specified binder

Epoxy composition // 2160291
The invention relates to compositions of polymer compositions based on epoxy Dianova resins and their hardeners which can be used as a binder for the production of GRP materials, in particular of shell structures

The invention relates to the production of epoxy composition (binder) used as impregnating solutions (compounds) in the manufacture of fiberglass

The invention relates to a chemical compound, namely N,N'-bis(m-phenoxyphenylacetic)-p-benzene, which can be used as a promoter of adhesion of the rubber to textiles and protivostaritel vulcanization of chouchkov

The invention relates to the production of epoxy composition (binder) used as impregnating solutions (compounds) in the manufacture of fiberglass

The invention relates to new chemical compound, namely N-benzyl-m-phenoxypropylamine, which can be used as a promoter of adhesion of the rubber to textiles and protivostaritel vulcanization of rubbers

The invention relates to new chemical compound, namely N-p-nitrophenyl-m-phenoxypropylamine, which can be used as a promoter of adhesion of the rubber to textiles

The invention relates to new chemical compound, namely N-p-methoxyphenyl-m-phenoxypropylamine, which can be used as antioxidant vulcanization of rubbers

The invention relates to new chemical compound, namely N-o-hydroxyphenyl-m-phenoxypropylamine, which can be used as antioxidant and protivostaritel vulcanization of rubbers

The invention relates to new chemical compound, namely N-phenyl-m-phenoxypropylamine, which can be used as antioxidant and antiozonant vulcanization of rubbers

The invention relates to the chemical industry, in particular to the technology of organic compounds
Up!