GB2286363A - Producing limited fire hazard epoxide glass laminates - Google Patents

Producing limited fire hazard epoxide glass laminates Download PDF

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Publication number
GB2286363A
GB2286363A GB9502662A GB9502662A GB2286363A GB 2286363 A GB2286363 A GB 2286363A GB 9502662 A GB9502662 A GB 9502662A GB 9502662 A GB9502662 A GB 9502662A GB 2286363 A GB2286363 A GB 2286363A
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GB
United Kingdom
Prior art keywords
parts
resin
resin composition
epoxide
amount
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9502662A
Other versions
GB2286363B (en
GB9502662D0 (en
Inventor
Neil Hogan
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BELFIELD Manufacturing Ltd
Original Assignee
BELFIELD Manufacturing Ltd
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Filing date
Publication date
Application filed by BELFIELD Manufacturing Ltd filed Critical BELFIELD Manufacturing Ltd
Publication of GB9502662D0 publication Critical patent/GB9502662D0/en
Publication of GB2286363A publication Critical patent/GB2286363A/en
Application granted granted Critical
Publication of GB2286363B publication Critical patent/GB2286363B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
    • B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
    • B29B15/10—Coating or impregnating independently of the moulding or shaping step
    • B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
    • B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
    • B29B15/125—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex by dipping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • C08J5/241—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres
    • C08J5/244—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres using glass fibres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
    • C08J5/249—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs characterised by the additives used in the prepolymer mixture
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0016—Non-flammable or resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins

Abstract

A resin composition is prepared comprising an epoxide resin and hydrated alumina and optionally one or more additives such as magnesium carbonate hydrate, calcium carbonate hydrate, magnesium hydroxide or calcium silicate. A glass fibre web is led from a supply reel through a bath of the resin composition to impregnate the web with the resin composition. The web is then delivered through a drying tower, partially polymerising the resin to produce a dry handleable prepreg sheet. A number of prepreg sheets are stacked and delivered to a laminate press. In the laminate press, the stack is compressed for a preset time period to form an epoxide glass laminate sheet. The sheet is then trimmed to any desired size. <IMAGE>

Description

"A Process for Producing Limited Fire Hazard EPoxide Glass Laminates" This invention relates to a process for the production of a limited fire hazard epoxide glass laminate, and to a resin composition used in said process.
Standard fire retardant epoxide glass laminates depend upon bromine built into the backbone of the resin to give them a degree of fire retardancy on combustion.
Unfortunately, the polymer system gives rise to dense, toxic fumes on combustion. This is particularly serious in confined spaces.
The present invention is directed towards overcoming this problem.
According to the invention there is provided a process for producing limited fire hazard epoxide glass laminates, comprising the steps: preparing a resin composition comprising an epoxide resin and hydrated alumina; filling a resin bath containing a quantity of the resin; leading a glass fibre web from a supply reel; passing the web through the resin bath, impregnating the web with the resin; conveying the web through a drying tower, partially polymerising the resin to produce a dry handleable prepreg sheet; stacking a selected number of prepreg sheets; delivering the stack of prepreg sheets to a laminate press and compressing the stack of prepreg sheets to a preset pressure, maintaining the pressurised stack at a preset temperature for a preset desirable time period to form an epoxide glass laminated sheet;; removing the laminated sheet and trimming the sheet to a preselected size.
In one embodiment of the invention, the resin composition further includes one or more additives selected from the group: magnesium carbonate hydrate or calcium carbonate hydrate, magnesium hydroxide and calcium silicate.
Preferably the hydrated alumina is present in an amount of 100-600 parts; the magnesium carbonate hydrate or calcium carbonate hydrate is present in an amount of 0-200 parts; the magnesium hydroxide is present in an amount of 0-200 parts; calcium silicate is present in an amount of 0-100 parts; all parts being parts by weight per 100 parts of epoxide resin.
In a particularly preferred embodiment of the invention the resin composition components are present in an amount of 150-600 parts hydrated alumina; 25-200 parts magnesium carbonate hydrate or calcium carbonate hydrate; 25-200 parts magnesium hydroxide; 25-100 parts calcium silicate, all parts being parts by weight per 100 parts of epoxide resin.
Preferably the resin composition further includes a solvent. Conveniently, methyl ethyl ketone or 2-methoxy ethanol may be provided as the solvent.
In a preferred embodiment the resin composition includes a curing agent. The curing agent may be dicyandiamide.
An accelerator such as benzyl dimethyl amine is preferably also included.
In another aspect the invention provides a resin composition, comprising an epoxide resin and hydrated alumina. Optionally, the resin composition may further include one or more additives selected from the group: magnesium carbonate hydrate or calcium carbonate hydrate; magnesium hydroxide and calcium silicate. In another embodiment, in the resin composition the hydrated alumina is present in an amount of 100-600 parts; the magnesium carbonate hydrate or calcium carbonate hydrate is present in an amount of 0-200 parts; the magnesium hydroxide is present in an amount of 0-200 parts; calcium silicate is present in an amount of 0-100 parts; all parts being parts by weight per 100 parts of epoxide resin.
Preferably the hydrated alumina is present in an amount of 150-600 parts; the magnesium carbonate hydrate or calcium carbonate hydrate is present in an amount of 35200 parts; the magnesium hydroxide is present in an amount of 25-200 parts; calcium silicate is present in an amount of 25-100 parts; all parts being parts by weight per 100 parts of epoxide resin.
In another aspect the invention provides a method for preparation of the composition comprising the steps: dissolving dicyandiamide in 2-methoxy ethanol and benzyl dimethylamine; adding epoxide resin to the mixture; aging the mixture for 24 hours; adding hydrated alumina to the mixture; and diluting the mixture with a ketonic solvent.
In another embodiment one or more of the additives may be added to the mixture with the hydrated alumina.
In a preferred embodiment a method for preparation of the composition comprises the steps; dissolving 3.5 parts of dicyandiamide in 2-methoxy ethanol and 0.2 parts benzyl dimethylamine; adding epoxide resin to the mixture; aging the mixture for 24 hours; adding 300 parts hydrated alumina, 75 parts magnesium carbonate hydrate or calcium carbonate hydrate, 75 parts magnesium hydroxide, 50 parts calcium silicate to the mixture, all parts being parts by weight per 100 parts of epoxide resin; and diluting the mixture with a ketonic solvent.
In a further aspect of the invention there is provided an epoxide glass laminate sheet whenever produced by the process as previously described.
The invention will be more clearly understood from the following description of some embodiments thereof, given by way of example only with reference to the accompanying drawing which is a schematic illustration of a process for producing epoxide glass laminates according to the invention.
A resin composition according to the invention may be prepared in accordance with the following example.
Example To a standard commercially available epoxide resin (DOW DER 652) was blended 3.5 parts of dicyandiamide predissolved in 2-methoxyethanol and 0.2 parts benzyl dimethylamine. The mixture was then aged for 24 hours.
To this mixture, dispersing with a shearing head mixer, was added: 300 parts hydrated alumina 75 parts magnesium/calcium carbonate hydrate 75 parts magnesium hydroxide 50 parts calcium silicate.
All parts being parts by weight per 100 parts epoxide resin.
This mixture, diluted with a ketonic solvent, was then impregnated into glass as described below.
Glass fibre, either woven or non-woven in roll form is passed through a resin bath which contains the resin composition. Downstream of the resin bath the web is passed through a drying tower where the solvent is removed, the resin being partially polymerised to produce a dry handleable sheet (pre-preg). Layers of pre-preg are then subjected to high pressures (e.g. 10-500 bar) and temperatures (e.g. 130-2000C) for times from 10 minutes to several hours in a laminate press. For the pre-preg incorporating a resin composition prepared according to the example above, layers to produce a 3 mm thick laminate can be compressed under 20 bar pressure for two hours at 165"C. The consolidated and fully polymerised material is then trimmed and cut to the required size before use on electrical insulation.
The laminate mentioned above has been tested to a French Specification NFF 16-101 which classifies the material according to its ignitability (I rating from 0, the best, to 5, the worst) and smoke/toxicity (F rating from 0, the best to 5, the worst). The material from this example gave a rating of IOFO. A comparable standard brominated epoxide glass laminate gave a rating of I2F4, indicating that it is unsuitable for use in environments where the ability to see to escape in a fire (smoke density) is paramount, or where toxic gas generation could be lethal.
It is envisaged that laminate material produced according to the invention is particularly suited for environmentally unfriendly situations such as railway tunnels or in rolling stock used in those tunnels.
The present invention indicates how the smoke density can be reduced to about 5% of that experienced with standard epoxide glass laminates, while also significantly reducing its toxicity and reducing the ignitability of the material.
The combination of hydrated alumina, a complex hydrated magnesium/calcium carbonate, magnesium hydroxide and calcium silicate has been found to give rise to an unexpected and synergistic behaviour in the reduction of smoke and toxic gas generation on the combustion of nonhalogenated epoxide resins.
It will be appreciated that it is possible to provide an effective resin composition comprising simply an epoxide resin and hydrated alumina. Other suitable resin compositions can be provided by the further inclusion of one or more of the additives - magnesium carbonate hydrate or calcium carbonate hydrate, magnesium hydroxide and calcium silicate.
The invention is not limited to the embodiments hereinbefore described which may be varied in and detail.

Claims (12)

CLAIMS:
1. A process for producing epoxide glass laminates, comprising the steps: preparing a resin composition comprising an epoxide resin and hydrated alumina; filling a resin bath containing a quantity of the resin; leading a glass fibre web from a supply reel; passing the web through the resin bath, impregnating the web with the resin; conveying the web through a drying tower, partially polymerising the resin to produce a dry handleable prepreg sheet; stacking a selected number of prepreg sheets; delivering the stack of prepreg sheets to a laminate press and compressing the stack of prepreg sheets to a preset pressure, maintaining the pressurised stack at a preset temperature for a preset desirable time period to form an epoxide glass laminated sheet; removing the laminated sheet and trimming the sheet to a preselected size.
2. A process as claimed in claim 1 wherein the resin composition further includes one or more additives selected from the group: magnesium carbonate hydrate or calcium carbonate hydrate; magnesium hydroxide and calcium silicate.
3. A process as claimed in claim 1 or 2 wherein in the resin composition the hydrated alumina is present in the amount of 100-600 parts; the magnesium carbonate hydrate or calcium carbonate hydrate is present in an amount of 0-200 parts; the magnesium hydroxide is present in an amount of 0-200 parts; calcium silicate is present in an amount of 0-100 parts; all parts being parts by weight per 100 parts of epoxide resin.
4. A process as claimed in claim 2 or 3 wherein in the resin composition the hydrated alumina is present in an amount of 150-600 parts, the magnesium carbonate hydrate or calcium carbonate hydrate is present in an amount of 25-200 parts; the magnesium hydroxide is present in an amount of 25-200 parts; calcium silicate is present in an amount of 25-100 parts; all parts being parts by weight per 100 parts of epoxide resin.
5. A process as claimed in any preceding claim wherein the resin composition further includes a solvent.
6. A process as claimed in claim 5 wherein the solvent is methyl ethyl ketone or 2 methoxyethanol.
7. A process as claimed in any preceding claim wherein the resin composition further includes a curing agent.
8. A process as claimed in claim 7 wherein the curing agent is dicyandiamide.
9. A process as claimed in any preceding claim wherein the resin composition further includes an accelerator.
10. A process as claimed in claim 9 wherein the accelerator is benzyl dimethylamine.
11. A process substantially as hereinbefore described with reference to the accompanying drawing.
12. An epoxide glass laminate whenever produced by the process as claimed in any preceding claim.
GB9502662A 1994-02-10 1995-02-10 A process for producing limited fire hazard epoxide glass laminates Expired - Fee Related GB2286363B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IE940123A IE80526B1 (en) 1994-02-10 1994-02-10 A process for producing limited fire hazard epoxide glass laminates

Publications (3)

Publication Number Publication Date
GB9502662D0 GB9502662D0 (en) 1995-03-29
GB2286363A true GB2286363A (en) 1995-08-16
GB2286363B GB2286363B (en) 1998-01-21

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Family Applications (1)

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GB9502662A Expired - Fee Related GB2286363B (en) 1994-02-10 1995-02-10 A process for producing limited fire hazard epoxide glass laminates

Country Status (2)

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GB (1) GB2286363B (en)
IE (1) IE80526B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008055459A2 (en) * 2006-11-06 2008-05-15 Ifc Composite Gmbh Method for producing a leaf spring from a composite fiber material containing a thermoplastic material, and leaf spring obtained by means of said method
WO2008055458A1 (en) * 2006-11-06 2008-05-15 Ifc Composite Gmbh Method for producing leaf springs from a fiber composite material

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GB2055842A (en) * 1979-07-17 1981-03-11 Gen Electric Fire resistant epoxy resin composition
JPS6018339A (en) * 1983-07-12 1985-01-30 住友ベークライト株式会社 Thermo-setting resin laminated board having excellent dimensional stability
JPS61143444A (en) * 1984-12-17 1986-07-01 Shin Kobe Electric Mach Co Ltd Epoxy resin laminate
JPS61278535A (en) * 1985-06-05 1986-12-09 Hitachi Chem Co Ltd Prepreg sheet
JPS63168439A (en) * 1986-12-27 1988-07-12 Sumitomo Bakelite Co Ltd Epoxy resin composition for laminated sheet
GB2211852A (en) * 1987-12-21 1989-07-12 Nippon Oil Co Ltd Resin composition for laminated sheets
EP0336360A2 (en) * 1988-04-04 1989-10-11 Dainippon Ink And Chemicals, Inc. Process for producing prepreg and laminated sheet
JPH0228243A (en) * 1988-07-15 1990-01-30 Toshiba Chem Corp Resin composition for laminate
JPH02117912A (en) * 1988-10-26 1990-05-02 Toshiba Chem Corp Resin composition for laminate
JPH02120330A (en) * 1988-10-28 1990-05-08 Shin Kobe Electric Mach Co Ltd Production of laminate
JPH02129233A (en) * 1988-11-08 1990-05-17 Kanebo Ltd Flame-retardant phenol resin prepreg

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US3563939A (en) * 1968-06-04 1971-02-16 Union Carbide Corp Alumino-organic binder compositions
JPS55137153A (en) * 1979-04-13 1980-10-25 Toshiba Corp Electrical insulating resin composition
JPS562340A (en) * 1979-06-19 1981-01-12 Matsushita Electric Ind Co Ltd Flame-retardant thermosetting resin composition
JPS5634746A (en) * 1979-08-29 1981-04-07 Matsushita Electric Ind Co Ltd Flame-retardant thermosetting resin composition

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2055842A (en) * 1979-07-17 1981-03-11 Gen Electric Fire resistant epoxy resin composition
JPS6018339A (en) * 1983-07-12 1985-01-30 住友ベークライト株式会社 Thermo-setting resin laminated board having excellent dimensional stability
JPS61143444A (en) * 1984-12-17 1986-07-01 Shin Kobe Electric Mach Co Ltd Epoxy resin laminate
JPS61278535A (en) * 1985-06-05 1986-12-09 Hitachi Chem Co Ltd Prepreg sheet
JPS63168439A (en) * 1986-12-27 1988-07-12 Sumitomo Bakelite Co Ltd Epoxy resin composition for laminated sheet
GB2211852A (en) * 1987-12-21 1989-07-12 Nippon Oil Co Ltd Resin composition for laminated sheets
EP0336360A2 (en) * 1988-04-04 1989-10-11 Dainippon Ink And Chemicals, Inc. Process for producing prepreg and laminated sheet
JPH0228243A (en) * 1988-07-15 1990-01-30 Toshiba Chem Corp Resin composition for laminate
JPH02117912A (en) * 1988-10-26 1990-05-02 Toshiba Chem Corp Resin composition for laminate
JPH02120330A (en) * 1988-10-28 1990-05-08 Shin Kobe Electric Mach Co Ltd Production of laminate
JPH02129233A (en) * 1988-11-08 1990-05-17 Kanebo Ltd Flame-retardant phenol resin prepreg

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008055459A2 (en) * 2006-11-06 2008-05-15 Ifc Composite Gmbh Method for producing a leaf spring from a composite fiber material containing a thermoplastic material, and leaf spring obtained by means of said method
WO2008055458A1 (en) * 2006-11-06 2008-05-15 Ifc Composite Gmbh Method for producing leaf springs from a fiber composite material
WO2008055459A3 (en) * 2006-11-06 2008-07-03 Ifc Composite Gmbh Method for producing a leaf spring from a composite fiber material containing a thermoplastic material, and leaf spring obtained by means of said method

Also Published As

Publication number Publication date
IE80526B1 (en) 1998-08-26
IE940123A1 (en) 1995-08-23
GB2286363B (en) 1998-01-21
GB9502662D0 (en) 1995-03-29

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