CA2241975A1 - Polyurethane insulating webs having a low coefficient of thermal conductivity and use of casting compositions containing isocyanurate groups for the production thereof - Google Patents
Polyurethane insulating webs having a low coefficient of thermal conductivity and use of casting compositions containing isocyanurate groups for the production thereof Download PDFInfo
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- CA2241975A1 CA2241975A1 CA002241975A CA2241975A CA2241975A1 CA 2241975 A1 CA2241975 A1 CA 2241975A1 CA 002241975 A CA002241975 A CA 002241975A CA 2241975 A CA2241975 A CA 2241975A CA 2241975 A1 CA2241975 A1 CA 2241975A1
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-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L73/00—Compositions of macromolecular compounds obtained by reactions forming a linkage containing oxygen or oxygen and carbon in the main chain, not provided for in groups C08L59/00 - C08L71/00; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
Abstract
Insulating webs suitable for metallic composite profiles are described, wherein these webs have a coefficient of thermal conductivity of 0.20 W/m -K or less. These insulating webs are produced from a polyurethane casting composition, wherein the polyurethane casting composition contains isocyanurate groups, and contains 5 to 15% by weight, based on the total weight of the casting composition, of hollow plastic beads having a density in the range of from 0.1 to 0.30 g/cm3,a nd having an average particle size in the range of from 5 to 200 µm.
The use of casting compositions having isocyanurate groups and containing hollow plastic beads satisfying the above requirements for the production of insulating webs is furthermore described. The invention also provides metallic composite profiles, in particular for the production of windows and doors, which are characterized by a K value of 2.00 W/m -K
or less.
The use of casting compositions having isocyanurate groups and containing hollow plastic beads satisfying the above requirements for the production of insulating webs is furthermore described. The invention also provides metallic composite profiles, in particular for the production of windows and doors, which are characterized by a K value of 2.00 W/m -K
or less.
Description
CA 0224197~ 1998-06-30 Mo4776 LeA 32,523 -USA
POLYURETHANE INSULATING WEBS HAVING A
LOW COEFFICIENT OF THERMAL CONDUCTIVITY
AND USE OF CASTING COMPOSITIONS CONTAINING
ISOCYANURATE GROUPS FOR THE PRODUCTION THEREOF
BACKGROUND OF THE INVENTION
This invention relates to insulating webs for metallic composite profiles, and in particular, for aluminum composite profiles for windows and doors. The present invention also relates to the polyurethane casting compositions having isocyanurate groups, and containing hollow expanded thermoplastic polymer beads as fillers for the production of these insulating webs and composite profiles.
Insulating webs are used to provide thermal insulation between metal profile components. Composites such as these metal profiles contains insulating webs in-between the exterior components are useful, for example, for windows or cladding units.
Unfilled casting compositions which cure to yield polyurethanes are widely used for the production of these insulating webs for metallic composite profiles, in particular, for aluminum composite profiles. The resultant profiles containing insulating webs are used, for example, for window and door construction. Suitable processes for producing these metallic composite profiles are described in, for example, German Patent 2,721,367. As set forth therein, the metal profiles are passed continuously, end to end, over roller conveyors at a steplessly adjustable production speed of < 30 m/minute beneath two stirred mixing heads, from which the liquid reaction mixture is discharged into the profile insulation zone. Once the liquid reaction mixture has cured, the auxiliary profiles previously placed between the profiles to be joined together are removed.
The requirements placed on the insulating web are, inter alia, low shrinkage, low (x value (coefficient of linear thermal expansion), low K
Mo4776 -2-value (thermal conductivity), and elevated thermal stability (for example, for powder coating at approx. 200~C).
The above-stated range of requirements have previously been achieved by adding fillers such as, for example, glass fibers, wollastonite, 5 barytes, aluminum hydroxide, etc., to polyisocyanurate/polyisocyanurate casting compositions, as described in, for example, German Patent 3,621 ,765.
The insulation values (thermal conductivity) of existing PU
insulating webs no longer adequately satisfy the current thermal 10 insulation requirements of the construction industry. These current requirements are set out in, for example, the Federal Republic of Germany in the 3rd thermal insulation regulations dated January 1, 1995.
More specifically, these regulations set a K value of 2.00 W/m -K or less for metallic composite profiles of frame material group 1.
Accordingly, polyurethane (PU) insulating webs for metallic composite profiles having a coefficient of thermal conductivity of 0.20 W/m -K or less would be desirable.
The object thus arose of providing PU insulating webs for metallic composite profiles having a thermal conductivity of 0.20 W/m -K or less, 20 combined with at least a constantly low shrinkage, a low a value, and an elevated thermal stability.
It has surprisingly now been found that it is possible, by the addition of certain hollow plastic beads as fillers in the casting compositions, to produce syntactic foams having densities of less than~5 1.0 g/cm3 which satisfy the above-stated range of requirements.
SUMMARY OF THE INVENTION
The present invention is directed to insulating webs suitable for metallic composite profiles, wherein these webs have a coefficient of thermal conductivity of 0.20 W/m -K or less. Suitable insulating webs are 30 produced from a polyurethane casting composition, wherein the CA 0224197~ 1998-06-30 Mo4776 -3-polyurethane casting composition has isocyanurate groups, and contains from about 5 to about 15% by weight, based on the total weight of the polyurethane casting composition, of hollow plastic beads characterized by a density in the range of from 0.10 to 0.30 g/cm3 and by an average particle size in the range of from 5 to 200 ,um.
The polyurethane casting compositions suitable for preparation of these insulating webs are liquid reaction mixtures which react to yield solid or foamed, preferably rigid polyurethane plastics containing isocyanurate groups. These are mixtures of organic, preferably aromatic 10 polyisocyanates with organic polyhydroxyl compounds, wherein the polyisocyanates are used in excess quantities, relative to the hydroxyl groups, to produce isocyanurate-modified polyurethanes. Generally, this means that the isocyanate index is within the range of from 90 to 2000, and preferably of from 100 to 1400.
The term "isocyanate index" as used herein refers to the number of isocyanate groups of the polyisocyanate component per 100 hydroxyl groups of the polyhydroxyl component.
Suitable polyurethane casting compositions, which react to yield isocyanurate-modified polyurethanes, are described in, for example, U.S.
20 Patent 4,182,826, the disclosure of which is herein incorporated by reference. These polyurethane casting compositions may also contain conventional auxiliary substances and additives, including, for example, catalysts such as, for example, dimethylbenzylamine, dibutyltin dilaurate or permethylated diethylenetriamine, catalysts for the trimerization of 25 isocyanate groups of the type described in U.S. Patent 4,182,826. It is also possible that other fillers, such as, for example, glass fibers, aluminum hydroxide, talcum, chalk, dolomite, mica, barytes or wollastonite (CaSiO3) may also optionally be added to the polyurethane casting compositions.
CA 0224197~ 1998-06-30 Mo4776 -4-lt is essential to the invention that the polyurethane casting compositions contain hollow plastic beads in a quantity of from about 5 to about 15%, preferably of from about 7 to about 12% by weight, based on the total weight of the polyurethane casting composition. Suitable hollow 5 plastic beads for the present invention have a density in the range of from 0.10 to 0.30 g/cm3, and an average particle size of 5 to 200 ,um.
The compressive strength of these hollow beads should preferably be greater than about 10 bar. Hollow plastic beads satisfying these requirements are commercially available, for example, under the name 10 DUALITE (Omega).
The present invention also provides improved metallic composite profiles comprising insulating webs having a coefficient of thermal expansion of 0.20 W/m -K or less. These insulating webs comprise polyurethane casting compositions having isocyanurate groups, and 15 containing from about 5 to about 15% by weight, based on the total weight of the polyurethane casting composition, of hollow plastic beads which have a density in the range of from 0.1 to 0.30 g/cm3, and have an average particle size in the range of from 5 to 200 ~um.
The hollow plastic beads may be added to the polyisocyanate 20 component and/or to the polyhydroxyl component which are to be used as reactants for the production of the polyurethane casting composition, and/or to a previously produced mixture of these two reactants.
It is surprising that these polyurethane casting compositions which have isocyanurate groups and contain the hollow plastic beads as 25 described herein as filler in a quantity of 5 to 15 wt.% result in insulatingwebs having a coefficient of thermal conductivity of 0.20 W/m -K or less.
The insulating webs as described herein advantageously exhibit very low shrinkage in combination with elevated thermal stability.
The present invention accordingly also provides the use of the 30 insulating webs according to the invention in metallic composite profiles.
CA 0224197~ 1998-06-30 Mo4776 -5-These metallic composite profiles advantageously have a K value of 2.00 W/m -K or less. Accordingly, the insulating webs of the present invention are preferably used in metallic composite profiles in application areas such as, for example, windows, doors and cladding units.
The composite profiles containing the insulating webs according to the invention are produced in a manner known per se, such as is described in, for example, German Patent 2,721,367. This method basically comprises continuously passing metal profiles, end to end, over conveyors at a steplessly production speed of no more than 30 m/minute, 10 under two stirred mixing heads which discharge the liquid reaction mixture into the profile insulation zone. After the liquid reaction mixture has cured, the auxiliary profiles which may be previously placed between the profiles to be joined together are removed. The composite profiles produced in this manner exhibit the advantageous characteristic of being 15 classed in frame material group 1, pursuant to the 3rd thermal insulation regulations of the Federal Republic of Germany.
These composite profiles are particularly suitable for the production of windows and doors. The insulating webs of the present invention advantageously exhibit a coefficient of thermal conductivity of 0.20 20 W/m -K or less, and in particular of 0.120 to 0.180 W/m -K.
The following examples further illustrate details for the process of this invention. The invention, which is set forth in the foregoing disclo-sure, is not to be limited either in spirit or scope by these examples.
Those skilled in the art will readily understand that known variations of 25 the conditions of the following procedures can be used. Unless otherwise noted, all temperatures are degrees Celsius and all percentages are percentages by weight.
CA 0224197~ 1998-06-30 Mo4776 -6-EXAM PLES
The following Examples describe reaction mixtures which may be used for the production of insulating webs.
General production method for the moldings:
In the event that the components A and B listed in the specific Examples below have an elevated gas content, they are briefly degassed at room temperature at approx. 20 Torr, but are otherwise used without further pretreatment. These components (A and B) are apportioned by means of a 2-component metering mixer or by pouring out the stated 10 ratios by weight into a mixing vessel and the components are thoroughly and carefully mixed in such a manner that, where possible, no air bubbles are stirred into the reaction mixture, and then are introduced into a sealed mold. The reaction mixture is here preferably produced at room temperature, while the mold temperature is adjusted to, approximately 15 80~C and held constant throughout the entire production process. After, approximately 3 to 5 minutes, the moldings are sufficiently well cured in the mold such that they may be removed without the risk of plastic deformation. Once cool, they may be used immediately, and tested after approximately 24 hours.
20 Example 1:
Component A:
100 parts by weight of a polyether polyol having an OH number of 36 and having a viscosity of 800 mPa -s at 25~C, which was prepared by the addition of a mixture of 83% propylene oxide and 17% ethylene oxide 25 to trimethylolpropane; and 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol were mixed together to yield component A.
CA 0224197~ 1998-06-30 Mo4776 -7-Component B:
150 parts by weight of a polyisocyanate mixture having an NCO
content of 28% and a viscosity at 25~C of 300 mPa -s and comprising:
(1) 100 parts by weight of a semi-prepolymer having an NCO
content of 24.5%, and which was prepared by reacting:
(a) 100 parts by weight of a mixture of (i) 80 parts by weight of 4,4'-diisocyanatodiphenylmethane, (ii) 10 parts by weight of 2,4'-diisocyanato-diphenylmethane and (iii) 10 parts by weight of tri- and higher functional polyisocyanates of the diphenylmethane senes, with (b) 12.5 parts by weight of polypropylene glycol having an OH number of 485;
15 and (2) 100 parts by weight of a polyisocyanate, which was produced by phosgenating aniline/ formaldehyde condensation products, and having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s.
The material from Example 1 exhibited inter alia the following characteristics:
Density: 1.18 g/cm3 Coefficient of thermal conductivity: 0.220 W/m -K
Heat distortion temperature: 210~C
Shrinkage: 1.60%
Example 2:
Component A:
100 parts by weight of a polyether polyol having an OH number of 36 and having a viscosity of 800 mPa -s at 25~C, which was prepared by CA 0224197~ 1998-06-30 Mo4776 -8-the addition of a mixture of 83% propylene oxide and 17% ethylene oxide to trimethylolpropane; and 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol were mixed with 1.0 parts by weight of zeolite; and 15 parts by weight of DUALITE, grade M 6032 AE, to yield 5 component A.
Component B:
150 parts by weight of a polyisocyanate mixture having an NCO
content of 28% and a viscosity at 25~C of 300 mPa -s and comprising:
(1) 100 parts by weight of a semi-prepolymer having an NCO
content of 24.5%, and which was obtained by reacting:
(a) 100 parts by weight of a mixture of (i) 80 parts by weight of 4,4'-diisocyanatodiphenylmethane, (ii) 10 parts by weight of 2,4'-diisocyanatodiphenylmethane and (iii) 10 parts by weight of tri- and higher functional polyisocyanates of the diphenylmethane series, with (b) 12.5 parts by weight of polypropylene glycol having an OH number of 485;
and (2) 100 parts by weight of a polyisocyanate which was produced by phosgenating aniline/ formaldehyde condensation products, and having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s;
25 and 1.5 parts by weight of zeolite; and 20 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component B.
The material from Example 2 exhibited inter alia the following characteristics:
Density: 0.680 g/cm3 Coefficient of thermal conductivity: 0.135 W/m -K
CA 0224197~ 1998-06-30 Mo4776 -9-Heat distortion temperature: 180~C
Shrinkage: 0.55%
Example 3:
Component A:
100 parts by weight of a polyether having an OH number of 36 having a viscosity of 800 mPa -s at 25~C, which was prepared by the addition of a mixture of 83% propylene oxide and 17% ethylene oxide to trimethylolpropane; 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol; 1.0 parts by weight of zeolite; and 15 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component A.
Component B:
150 parts by weight of a polyisocyanate having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s, and which was produced by phosgenating aniline/formaldehyde condensation products; 1.5 parts by weight of zeolite; and 20 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component B.
The material from Example 3 exhibited inter alia the following characteristics:
Density: 0.70 g/cm3 Coefficient of thermal conductivity: 0.142 W/m -K
Heat distortion temperature: 215~C
Shrinkage: 0.70%
Although the invention has been described in detail in the 25 foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
POLYURETHANE INSULATING WEBS HAVING A
LOW COEFFICIENT OF THERMAL CONDUCTIVITY
AND USE OF CASTING COMPOSITIONS CONTAINING
ISOCYANURATE GROUPS FOR THE PRODUCTION THEREOF
BACKGROUND OF THE INVENTION
This invention relates to insulating webs for metallic composite profiles, and in particular, for aluminum composite profiles for windows and doors. The present invention also relates to the polyurethane casting compositions having isocyanurate groups, and containing hollow expanded thermoplastic polymer beads as fillers for the production of these insulating webs and composite profiles.
Insulating webs are used to provide thermal insulation between metal profile components. Composites such as these metal profiles contains insulating webs in-between the exterior components are useful, for example, for windows or cladding units.
Unfilled casting compositions which cure to yield polyurethanes are widely used for the production of these insulating webs for metallic composite profiles, in particular, for aluminum composite profiles. The resultant profiles containing insulating webs are used, for example, for window and door construction. Suitable processes for producing these metallic composite profiles are described in, for example, German Patent 2,721,367. As set forth therein, the metal profiles are passed continuously, end to end, over roller conveyors at a steplessly adjustable production speed of < 30 m/minute beneath two stirred mixing heads, from which the liquid reaction mixture is discharged into the profile insulation zone. Once the liquid reaction mixture has cured, the auxiliary profiles previously placed between the profiles to be joined together are removed.
The requirements placed on the insulating web are, inter alia, low shrinkage, low (x value (coefficient of linear thermal expansion), low K
Mo4776 -2-value (thermal conductivity), and elevated thermal stability (for example, for powder coating at approx. 200~C).
The above-stated range of requirements have previously been achieved by adding fillers such as, for example, glass fibers, wollastonite, 5 barytes, aluminum hydroxide, etc., to polyisocyanurate/polyisocyanurate casting compositions, as described in, for example, German Patent 3,621 ,765.
The insulation values (thermal conductivity) of existing PU
insulating webs no longer adequately satisfy the current thermal 10 insulation requirements of the construction industry. These current requirements are set out in, for example, the Federal Republic of Germany in the 3rd thermal insulation regulations dated January 1, 1995.
More specifically, these regulations set a K value of 2.00 W/m -K or less for metallic composite profiles of frame material group 1.
Accordingly, polyurethane (PU) insulating webs for metallic composite profiles having a coefficient of thermal conductivity of 0.20 W/m -K or less would be desirable.
The object thus arose of providing PU insulating webs for metallic composite profiles having a thermal conductivity of 0.20 W/m -K or less, 20 combined with at least a constantly low shrinkage, a low a value, and an elevated thermal stability.
It has surprisingly now been found that it is possible, by the addition of certain hollow plastic beads as fillers in the casting compositions, to produce syntactic foams having densities of less than~5 1.0 g/cm3 which satisfy the above-stated range of requirements.
SUMMARY OF THE INVENTION
The present invention is directed to insulating webs suitable for metallic composite profiles, wherein these webs have a coefficient of thermal conductivity of 0.20 W/m -K or less. Suitable insulating webs are 30 produced from a polyurethane casting composition, wherein the CA 0224197~ 1998-06-30 Mo4776 -3-polyurethane casting composition has isocyanurate groups, and contains from about 5 to about 15% by weight, based on the total weight of the polyurethane casting composition, of hollow plastic beads characterized by a density in the range of from 0.10 to 0.30 g/cm3 and by an average particle size in the range of from 5 to 200 ,um.
The polyurethane casting compositions suitable for preparation of these insulating webs are liquid reaction mixtures which react to yield solid or foamed, preferably rigid polyurethane plastics containing isocyanurate groups. These are mixtures of organic, preferably aromatic 10 polyisocyanates with organic polyhydroxyl compounds, wherein the polyisocyanates are used in excess quantities, relative to the hydroxyl groups, to produce isocyanurate-modified polyurethanes. Generally, this means that the isocyanate index is within the range of from 90 to 2000, and preferably of from 100 to 1400.
The term "isocyanate index" as used herein refers to the number of isocyanate groups of the polyisocyanate component per 100 hydroxyl groups of the polyhydroxyl component.
Suitable polyurethane casting compositions, which react to yield isocyanurate-modified polyurethanes, are described in, for example, U.S.
20 Patent 4,182,826, the disclosure of which is herein incorporated by reference. These polyurethane casting compositions may also contain conventional auxiliary substances and additives, including, for example, catalysts such as, for example, dimethylbenzylamine, dibutyltin dilaurate or permethylated diethylenetriamine, catalysts for the trimerization of 25 isocyanate groups of the type described in U.S. Patent 4,182,826. It is also possible that other fillers, such as, for example, glass fibers, aluminum hydroxide, talcum, chalk, dolomite, mica, barytes or wollastonite (CaSiO3) may also optionally be added to the polyurethane casting compositions.
CA 0224197~ 1998-06-30 Mo4776 -4-lt is essential to the invention that the polyurethane casting compositions contain hollow plastic beads in a quantity of from about 5 to about 15%, preferably of from about 7 to about 12% by weight, based on the total weight of the polyurethane casting composition. Suitable hollow 5 plastic beads for the present invention have a density in the range of from 0.10 to 0.30 g/cm3, and an average particle size of 5 to 200 ,um.
The compressive strength of these hollow beads should preferably be greater than about 10 bar. Hollow plastic beads satisfying these requirements are commercially available, for example, under the name 10 DUALITE (Omega).
The present invention also provides improved metallic composite profiles comprising insulating webs having a coefficient of thermal expansion of 0.20 W/m -K or less. These insulating webs comprise polyurethane casting compositions having isocyanurate groups, and 15 containing from about 5 to about 15% by weight, based on the total weight of the polyurethane casting composition, of hollow plastic beads which have a density in the range of from 0.1 to 0.30 g/cm3, and have an average particle size in the range of from 5 to 200 ~um.
The hollow plastic beads may be added to the polyisocyanate 20 component and/or to the polyhydroxyl component which are to be used as reactants for the production of the polyurethane casting composition, and/or to a previously produced mixture of these two reactants.
It is surprising that these polyurethane casting compositions which have isocyanurate groups and contain the hollow plastic beads as 25 described herein as filler in a quantity of 5 to 15 wt.% result in insulatingwebs having a coefficient of thermal conductivity of 0.20 W/m -K or less.
The insulating webs as described herein advantageously exhibit very low shrinkage in combination with elevated thermal stability.
The present invention accordingly also provides the use of the 30 insulating webs according to the invention in metallic composite profiles.
CA 0224197~ 1998-06-30 Mo4776 -5-These metallic composite profiles advantageously have a K value of 2.00 W/m -K or less. Accordingly, the insulating webs of the present invention are preferably used in metallic composite profiles in application areas such as, for example, windows, doors and cladding units.
The composite profiles containing the insulating webs according to the invention are produced in a manner known per se, such as is described in, for example, German Patent 2,721,367. This method basically comprises continuously passing metal profiles, end to end, over conveyors at a steplessly production speed of no more than 30 m/minute, 10 under two stirred mixing heads which discharge the liquid reaction mixture into the profile insulation zone. After the liquid reaction mixture has cured, the auxiliary profiles which may be previously placed between the profiles to be joined together are removed. The composite profiles produced in this manner exhibit the advantageous characteristic of being 15 classed in frame material group 1, pursuant to the 3rd thermal insulation regulations of the Federal Republic of Germany.
These composite profiles are particularly suitable for the production of windows and doors. The insulating webs of the present invention advantageously exhibit a coefficient of thermal conductivity of 0.20 20 W/m -K or less, and in particular of 0.120 to 0.180 W/m -K.
The following examples further illustrate details for the process of this invention. The invention, which is set forth in the foregoing disclo-sure, is not to be limited either in spirit or scope by these examples.
Those skilled in the art will readily understand that known variations of 25 the conditions of the following procedures can be used. Unless otherwise noted, all temperatures are degrees Celsius and all percentages are percentages by weight.
CA 0224197~ 1998-06-30 Mo4776 -6-EXAM PLES
The following Examples describe reaction mixtures which may be used for the production of insulating webs.
General production method for the moldings:
In the event that the components A and B listed in the specific Examples below have an elevated gas content, they are briefly degassed at room temperature at approx. 20 Torr, but are otherwise used without further pretreatment. These components (A and B) are apportioned by means of a 2-component metering mixer or by pouring out the stated 10 ratios by weight into a mixing vessel and the components are thoroughly and carefully mixed in such a manner that, where possible, no air bubbles are stirred into the reaction mixture, and then are introduced into a sealed mold. The reaction mixture is here preferably produced at room temperature, while the mold temperature is adjusted to, approximately 15 80~C and held constant throughout the entire production process. After, approximately 3 to 5 minutes, the moldings are sufficiently well cured in the mold such that they may be removed without the risk of plastic deformation. Once cool, they may be used immediately, and tested after approximately 24 hours.
20 Example 1:
Component A:
100 parts by weight of a polyether polyol having an OH number of 36 and having a viscosity of 800 mPa -s at 25~C, which was prepared by the addition of a mixture of 83% propylene oxide and 17% ethylene oxide 25 to trimethylolpropane; and 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol were mixed together to yield component A.
CA 0224197~ 1998-06-30 Mo4776 -7-Component B:
150 parts by weight of a polyisocyanate mixture having an NCO
content of 28% and a viscosity at 25~C of 300 mPa -s and comprising:
(1) 100 parts by weight of a semi-prepolymer having an NCO
content of 24.5%, and which was prepared by reacting:
(a) 100 parts by weight of a mixture of (i) 80 parts by weight of 4,4'-diisocyanatodiphenylmethane, (ii) 10 parts by weight of 2,4'-diisocyanato-diphenylmethane and (iii) 10 parts by weight of tri- and higher functional polyisocyanates of the diphenylmethane senes, with (b) 12.5 parts by weight of polypropylene glycol having an OH number of 485;
15 and (2) 100 parts by weight of a polyisocyanate, which was produced by phosgenating aniline/ formaldehyde condensation products, and having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s.
The material from Example 1 exhibited inter alia the following characteristics:
Density: 1.18 g/cm3 Coefficient of thermal conductivity: 0.220 W/m -K
Heat distortion temperature: 210~C
Shrinkage: 1.60%
Example 2:
Component A:
100 parts by weight of a polyether polyol having an OH number of 36 and having a viscosity of 800 mPa -s at 25~C, which was prepared by CA 0224197~ 1998-06-30 Mo4776 -8-the addition of a mixture of 83% propylene oxide and 17% ethylene oxide to trimethylolpropane; and 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol were mixed with 1.0 parts by weight of zeolite; and 15 parts by weight of DUALITE, grade M 6032 AE, to yield 5 component A.
Component B:
150 parts by weight of a polyisocyanate mixture having an NCO
content of 28% and a viscosity at 25~C of 300 mPa -s and comprising:
(1) 100 parts by weight of a semi-prepolymer having an NCO
content of 24.5%, and which was obtained by reacting:
(a) 100 parts by weight of a mixture of (i) 80 parts by weight of 4,4'-diisocyanatodiphenylmethane, (ii) 10 parts by weight of 2,4'-diisocyanatodiphenylmethane and (iii) 10 parts by weight of tri- and higher functional polyisocyanates of the diphenylmethane series, with (b) 12.5 parts by weight of polypropylene glycol having an OH number of 485;
and (2) 100 parts by weight of a polyisocyanate which was produced by phosgenating aniline/ formaldehyde condensation products, and having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s;
25 and 1.5 parts by weight of zeolite; and 20 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component B.
The material from Example 2 exhibited inter alia the following characteristics:
Density: 0.680 g/cm3 Coefficient of thermal conductivity: 0.135 W/m -K
CA 0224197~ 1998-06-30 Mo4776 -9-Heat distortion temperature: 180~C
Shrinkage: 0.55%
Example 3:
Component A:
100 parts by weight of a polyether having an OH number of 36 having a viscosity of 800 mPa -s at 25~C, which was prepared by the addition of a mixture of 83% propylene oxide and 17% ethylene oxide to trimethylolpropane; 0.90 parts by weight of a solution of alkali metal acetate in diethylene glycol; 1.0 parts by weight of zeolite; and 15 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component A.
Component B:
150 parts by weight of a polyisocyanate having an NCO content of 31.5% and a viscosity at 25~C of 60 mPa -s, and which was produced by phosgenating aniline/formaldehyde condensation products; 1.5 parts by weight of zeolite; and 20 parts by weight of DUALITE, grade M 6032 AE, were mixed together to yield component B.
The material from Example 3 exhibited inter alia the following characteristics:
Density: 0.70 g/cm3 Coefficient of thermal conductivity: 0.142 W/m -K
Heat distortion temperature: 215~C
Shrinkage: 0.70%
Although the invention has been described in detail in the 25 foregoing for the purpose of illustration, it is to be understood that such detail is solely for that purpose and that variations can be made therein by those skilled in the art without departing from the spirit and scope of the invention except as it may be limited by the claims.
Claims (6)
1. An insulating web having a coefficient of thermal conductivity of 0.2 W/m K or less, and being produced from a polyurethane casting composition, wherein said polyurethane casting composition has isocyanurate groups and contains from 5 to 15% by weight, based on the total weight of the casting composition, of hollow plastic beads which have a density ranging from 0.1 to 0.30 g/cm3 and an average particle size ranging from 5 to 200 µm.
2. The insulating web of Claim 1, wherein said hollow plastic beads have a density of 0.13 g/cm3, an average particle size of 110 µm, a coefficient of thermal conductivity of 0.04 W/m-K and a compressive strength of at least 10 bar.
3. The insulating web of Claim 1, wherein the ratio of said casting composition to said hollow plastic beads is 87:13 by weight and 43:57 by volume.
4. The insulating web of Claim 1, wherein the coefficient of thermal conductivity of said insulating web is in the range from 0.12 to 0.18 W/m-K.
5. In a process for the production of insulating webs having a coefficient of thermal conductivity of 0.20 W/m-K or less, comprising casting a polyurethane casting composition onto a composite profile, the improvement wherein said polyurethane casting composition has isocyanurate groups, and contains from 5 to 15 wt.%, based on the total weight of the casting composition, of hollow plastic beads which have a density in the range of from 0.1 to 0.30 g/cm3 and an average particle size in the range from 5 to 200 µm, for the production of insulating webs.
6. In a process for the production of metallic composite profiles containing an insulating web, the improvement wherein said insulating web comprises the composition of Claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19728794.8 | 1997-07-05 | ||
| DE19728794A DE19728794C1 (en) | 1997-07-05 | 1997-07-05 | Polyurethane insulating bars with a low thermal conductivity and the use of casting compounds containing isocyanurate for their production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2241975A1 true CA2241975A1 (en) | 1999-01-05 |
Family
ID=7834775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002241975A Abandoned CA2241975A1 (en) | 1997-07-05 | 1998-06-30 | Polyurethane insulating webs having a low coefficient of thermal conductivity and use of casting compositions containing isocyanurate groups for the production thereof |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0889070A3 (en) |
| JP (1) | JPH1135707A (en) |
| KR (1) | KR19990013608A (en) |
| CA (1) | CA2241975A1 (en) |
| DE (1) | DE19728794C1 (en) |
| PL (1) | PL327161A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE20318330U1 (en) * | 2003-11-25 | 2005-04-14 | Brandenburger Isoliertechnik Gmbh & Co | Thermoisolierplatte |
| ES2940693T3 (en) | 2016-04-05 | 2023-05-10 | JustRide | hub gear |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3621765A1 (en) * | 1986-06-28 | 1988-01-07 | Hueck Fa E | Use of casting compositions completely reacting to form polyurethanes for the production of insulating webs for metal composite profiles |
| FR2616792B1 (en) * | 1987-06-17 | 1991-10-04 | Alsthom | HEAT RESISTANT FOAM STRUCTURED MATERIAL FROM OXAZOLIDON AND ISOCYANURATE POLYMERS |
| US5244613A (en) * | 1993-01-21 | 1993-09-14 | Miles Inc. | Process for the production of reinforced moldings and the resultant products |
| CA2127565C (en) * | 1993-08-16 | 2002-02-26 | Bayer Corporation | Process for the production of reinforced moldings and the resultant products |
-
1997
- 1997-07-05 DE DE19728794A patent/DE19728794C1/en not_active Expired - Fee Related
-
1998
- 1998-06-23 EP EP98111502A patent/EP0889070A3/en not_active Withdrawn
- 1998-06-30 CA CA002241975A patent/CA2241975A1/en not_active Abandoned
- 1998-07-02 PL PL98327161A patent/PL327161A1/en unknown
- 1998-07-03 JP JP10202877A patent/JPH1135707A/en active Pending
- 1998-07-04 KR KR1019980026988A patent/KR19990013608A/en not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DE19728794C1 (en) | 1999-07-01 |
| EP0889070A2 (en) | 1999-01-07 |
| JPH1135707A (en) | 1999-02-09 |
| KR19990013608A (en) | 1999-02-25 |
| EP0889070A3 (en) | 1999-06-16 |
| PL327161A1 (en) | 1999-01-18 |
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Legal Events
| Date | Code | Title | Description |
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| FZDE | Discontinued |