CA2113509A1 - Process of manufacturing shaped articles of flexible polyurethane integral foam - Google Patents
Process of manufacturing shaped articles of flexible polyurethane integral foamInfo
- Publication number
- CA2113509A1 CA2113509A1 CA002113509A CA2113509A CA2113509A1 CA 2113509 A1 CA2113509 A1 CA 2113509A1 CA 002113509 A CA002113509 A CA 002113509A CA 2113509 A CA2113509 A CA 2113509A CA 2113509 A1 CA2113509 A1 CA 2113509A1
- Authority
- CA
- Canada
- Prior art keywords
- polyol
- integral foam
- foam
- hydrocarbons
- carbon atoms
- 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.)
- Abandoned
Links
- 239000006260 foam Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000004814 polyurethane Substances 0.000 title claims description 17
- 229920002635 polyurethane Polymers 0.000 title claims description 17
- 229920005862 polyol Polymers 0.000 claims abstract description 16
- 150000003077 polyols Chemical class 0.000 claims abstract description 15
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 11
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 9
- 239000012948 isocyanate Substances 0.000 claims abstract description 9
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 10
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 230000001413 cellular effect Effects 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 150000002576 ketones Chemical class 0.000 claims description 2
- 239000003960 organic solvent Substances 0.000 claims description 2
- 150000002170 ethers Chemical class 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 5
- 229920000570 polyether Polymers 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005187 foaming Methods 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000011541 reaction mixture Substances 0.000 description 4
- 210000003850 cellular structure Anatomy 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229920005903 polyol mixture Polymers 0.000 description 3
- VOPWNXZWBYDODV-UHFFFAOYSA-N Chlorodifluoromethane Chemical compound FC(F)Cl VOPWNXZWBYDODV-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000004872 foam stabilizing agent Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920001228 polyisocyanate Polymers 0.000 description 2
- 239000005056 polyisocyanate Substances 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241000428533 Rhis Species 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 0.000 description 1
Classifications
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/142—Compounds containing oxygen but no halogen atom
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/04—Hand wheels
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
-
- 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
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Molding Of Porous Articles (AREA)
Abstract
ABSTRACT
In a process of manufacturing shaped articles of flexible PUR integral foam, which is foamed in a mold, which process comprises the polyaddition of a polyol and an isocyanate in the presence of water, the formation of a closed tough skin on the shaped article without a use of CFHC is ensured in that 40 to 60% by volume air, 0.05 to 2.5% by weight water and 0.25 to 2.0% by weight of at least one of the hydrocarbons having 1 to 6 carbon atoms are in-corporated in the polyol.
In a process of manufacturing shaped articles of flexible PUR integral foam, which is foamed in a mold, which process comprises the polyaddition of a polyol and an isocyanate in the presence of water, the formation of a closed tough skin on the shaped article without a use of CFHC is ensured in that 40 to 60% by volume air, 0.05 to 2.5% by weight water and 0.25 to 2.0% by weight of at least one of the hydrocarbons having 1 to 6 carbon atoms are in-corporated in the polyol.
Description
21135~
!
KOL~ENSC~ 1DT KG January 18, 1993 Karl-Schmidt-Strasse 7107 Neckarsulm Case No. 93 00 02 Process of Manufacturing Shaoed Articles of Flexible Polyurethane Integral Foam DESCRIPTION
rhis invention relates to a process of manu-facturing shaped articles of flexible polyurethane (PUR) integral foam, which is fDamed in a mold to and has a cel-lular core, which merges outwardly into a tough closed~skin, which process comprises a polyaddition of a polyol and an ~ -~
isocyanate in the presence of water with release of expand-ing and foam-forming carbon dioxide. -~ ;
In the most widely used process of manufactur-ing shaped articles of flexible PUR integral foam having a cellular core and a closed compact skin a polyol, mainly a . .
polyester polyol or polyether polyol, is thoroughly mixed with ~an isocyanate in the presence o~ a chlorofluorinated hydrocarbon (CFHC), particularly trichlorofluoromethane called R11 in DIN 8962) and the foamable reaction mixture is injected in a liquid state into a closed mold cavity. After a s!tartup time of only a few seconds, an exothermic reaction I ~
ensues and the heat which is thus liberated heats the CFHC ~ ~`
to its evaporation point so that the resulting gas causes ~ -the core of the shaped article to have a cellular structure. ~ ~
" :' .. ..
: :
!
KOL~ENSC~ 1DT KG January 18, 1993 Karl-Schmidt-Strasse 7107 Neckarsulm Case No. 93 00 02 Process of Manufacturing Shaoed Articles of Flexible Polyurethane Integral Foam DESCRIPTION
rhis invention relates to a process of manu-facturing shaped articles of flexible polyurethane (PUR) integral foam, which is fDamed in a mold to and has a cel-lular core, which merges outwardly into a tough closed~skin, which process comprises a polyaddition of a polyol and an ~ -~
isocyanate in the presence of water with release of expand-ing and foam-forming carbon dioxide. -~ ;
In the most widely used process of manufactur-ing shaped articles of flexible PUR integral foam having a cellular core and a closed compact skin a polyol, mainly a . .
polyester polyol or polyether polyol, is thoroughly mixed with ~an isocyanate in the presence o~ a chlorofluorinated hydrocarbon (CFHC), particularly trichlorofluoromethane called R11 in DIN 8962) and the foamable reaction mixture is injected in a liquid state into a closed mold cavity. After a s!tartup time of only a few seconds, an exothermic reaction I ~
ensues and the heat which is thus liberated heats the CFHC ~ ~`
to its evaporation point so that the resulting gas causes ~ -the core of the shaped article to have a cellular structure. ~ ~
" :' .. ..
: :
2 ~ 1 3 ~
- 2 - ;
., - :
Because the ~,~all defining -the mold cavity is cooled from ;~-the outside, the CFHC is condensed to form a closed tough skin on the outside of the shaped article (~E-B-1 778 457).
Since it has been discovered that CFHC has a deleterious action on the ozone layer of the atmosphere, it has been endeavored in the art to replace CFHC by ex-panding and foam-forming agents which are less hazardous.
For instance, it has been mentioned in the periodical Euro-pean Plastics News, September 1991, on page 45, that in the manufacture of steering wheels and head rests for motor ve-hicles, which articles comprise a sheath of flexible PUR in-tegral foam, it is possible to use expanding agents consist~
,, .
ing of chlorodifluoromethane (HCFHC, called R22 in DIN
8962), and high concentrations of ethylene oxide in the po- -~
lyol, or carbon dioxide, which is released during the poly~
addition of polyol and isocyanate in the presence of water.
When shaped articles of flexible PUR integral foam are manufactured by the polyaddition of a polyol and ~ -~
isocyanate in the ~pesence of water, carbon dioxide is formed during the exothermic chemical reaction and causes the core of the shaped article to have a cellular structure but does ~ -;
not permit the formation of a sufficiently closed tough skin.
For this reason it is an obJect of the prese~
invention so to improve the process described first hereinbe-fore for the manufacture of shaped articles of flexible PUR
,~, 21~3 3~
- 2 - ;
., - :
Because the ~,~all defining -the mold cavity is cooled from ;~-the outside, the CFHC is condensed to form a closed tough skin on the outside of the shaped article (~E-B-1 778 457).
Since it has been discovered that CFHC has a deleterious action on the ozone layer of the atmosphere, it has been endeavored in the art to replace CFHC by ex-panding and foam-forming agents which are less hazardous.
For instance, it has been mentioned in the periodical Euro-pean Plastics News, September 1991, on page 45, that in the manufacture of steering wheels and head rests for motor ve-hicles, which articles comprise a sheath of flexible PUR in-tegral foam, it is possible to use expanding agents consist~
,, .
ing of chlorodifluoromethane (HCFHC, called R22 in DIN
8962), and high concentrations of ethylene oxide in the po- -~
lyol, or carbon dioxide, which is released during the poly~
addition of polyol and isocyanate in the presence of water.
When shaped articles of flexible PUR integral foam are manufactured by the polyaddition of a polyol and ~ -~
isocyanate in the ~pesence of water, carbon dioxide is formed during the exothermic chemical reaction and causes the core of the shaped article to have a cellular structure but does ~ -;
not permit the formation of a sufficiently closed tough skin.
For this reason it is an obJect of the prese~
invention so to improve the process described first hereinbe-fore for the manufacture of shaped articles of flexible PUR
,~, 21~3 3~
integral foam that the core of the resulting shaped article has a homogeneous cell structure and -that its skin is per-fectly closed and tough whereas the use of CFHC can be avoi-ded.
This object is accomplished in that 40 to 60% -by volume air, 0.05 to 2.~% by weight water and 0.25 to 2.0 by weight of at least one of the hydrocarbons havin~ 1 to -~
6 carbon atoms are incorporated in the polyol.
At least one of the hydrocarbons having 1 to 6 carbon atoms, which like carbon dioxide and air has an expanding and foam-forming action, is used only in a rela~
tively small proportion and by its condensation on the cooler wall which defines the closed mold cavity permits the for-mation of a closed tough skin on the shaped article of flex-- ;
ible PUR integral foam.
Among the hydrocarbons having 1 to 6 carbon atoms, pentane has proved to be particularly desirable for the formation of the closed tough skin on the shaped article ~ -which consists of flexible PUR integral foam. n-pentane and its isomers can be used to special advantage.
The hydrocarbons having 1 to 6 carbon atoms can be replaced entirely or in part by other 1W~boiling organic solvents~, particularly by e~hers, ketones, and esters, whtch may be used individually or in combination.
-2~133~ ~
This object is accomplished in that 40 to 60% -by volume air, 0.05 to 2.~% by weight water and 0.25 to 2.0 by weight of at least one of the hydrocarbons havin~ 1 to -~
6 carbon atoms are incorporated in the polyol.
At least one of the hydrocarbons having 1 to 6 carbon atoms, which like carbon dioxide and air has an expanding and foam-forming action, is used only in a rela~
tively small proportion and by its condensation on the cooler wall which defines the closed mold cavity permits the for-mation of a closed tough skin on the shaped article of flex-- ;
ible PUR integral foam.
Among the hydrocarbons having 1 to 6 carbon atoms, pentane has proved to be particularly desirable for the formation of the closed tough skin on the shaped article ~ -which consists of flexible PUR integral foam. n-pentane and its isomers can be used to special advantage.
The hydrocarbons having 1 to 6 carbon atoms can be replaced entirely or in part by other 1W~boiling organic solvents~, particularly by e~hers, ketones, and esters, whtch may be used individually or in combination.
-2~133~ ~
In the manufacture or the flexible PUR inte- -gral foam it is particularly desirable to use aliphatic and aromatic polyisocyanates and to use as polyols pre-ferably polyes~er polyols and polyether polyols. Additio-nal additives which may be ui~ed in the polyaddition of ~ -polyol and isocyanate with an addition of water may com~
prise catalysts, emulsifying agents, foam-stabilizing agents, pigments, age inhibitors and flame retardants.
: :.-In the process, at least one of the hydrocar- ~ - -bons having 1 to 6 carbon atoms and the water which is re- -quired for the reaction of polyol and isocyanate with for-mation of carbon dioxide are initially admixed to the poly-ol. Thereafter the polyol mixture, which is contained in a closed -tank under a high superatmospheric pressure, is , aerated with air and is subsequently thoroughly mixed with ~- -isocyanate. The resulting foamable reaction mixture is in- -jected in a liquid state into a closed mold cavity. l~lhen ~
the foaming reaction has been termianted the volume of the - --mold cavity has been completely filled. The shaped article of PUR integral foam has a closed tough skin and a core hav- ~-~
ing a homogeneous cellular structure. ;`
The process in accordance with the invention will be explained more in detail hereinafter with reference to'an example.
It is desired to manufacture a steering wheel, - ~
~ ;
which consists of a metal skeleton and a sheath o~flexible ~. ' ;' - ~ 2113~
PUR integral foam. To that end, polyether polyol, which contains catalysts, emulsifying agents, pigments, foam stabilizers, age inhibitors, and flame retardants, is mixed with 1% by weight n-pentane and lX by weight water.
The resulting mixture is charged into a closed tank and air is beaten into the polyether polyol mixture under a -~
superatmospheric pressure of 4 bars unti~ about 50% by vo- ~-lume of the mixture consist of air. Thereafter, two parts by ~-weight of the polyether polyol mixture are thoroughly mixed with one ~rt by weight of a polyisocyanate and after the metal skeleton for the steering wheel has been installed in the foaming mold and the latter has been closed the foamable reaction mixture is injected into the mold cavity in such a manner that the free part of the mold cavity is just com-pletely occupied by the resulting flexible PUR integral foam. Before the metal skeleton is installed in the foaming mold, a release agent is sprayed into the mold to coat its ~ ;
inside surface. The foaming mold is opened about 3 minutes after the injection of the foamable reaction mixture and the steering wheel, which is sheathed by a flexible layer of PUR
integral foam, is taken from the mold.
,'.,"''.
" ~"''.
' '~ '"
prise catalysts, emulsifying agents, foam-stabilizing agents, pigments, age inhibitors and flame retardants.
: :.-In the process, at least one of the hydrocar- ~ - -bons having 1 to 6 carbon atoms and the water which is re- -quired for the reaction of polyol and isocyanate with for-mation of carbon dioxide are initially admixed to the poly-ol. Thereafter the polyol mixture, which is contained in a closed -tank under a high superatmospheric pressure, is , aerated with air and is subsequently thoroughly mixed with ~- -isocyanate. The resulting foamable reaction mixture is in- -jected in a liquid state into a closed mold cavity. l~lhen ~
the foaming reaction has been termianted the volume of the - --mold cavity has been completely filled. The shaped article of PUR integral foam has a closed tough skin and a core hav- ~-~
ing a homogeneous cellular structure. ;`
The process in accordance with the invention will be explained more in detail hereinafter with reference to'an example.
It is desired to manufacture a steering wheel, - ~
~ ;
which consists of a metal skeleton and a sheath o~flexible ~. ' ;' - ~ 2113~
PUR integral foam. To that end, polyether polyol, which contains catalysts, emulsifying agents, pigments, foam stabilizers, age inhibitors, and flame retardants, is mixed with 1% by weight n-pentane and lX by weight water.
The resulting mixture is charged into a closed tank and air is beaten into the polyether polyol mixture under a -~
superatmospheric pressure of 4 bars unti~ about 50% by vo- ~-lume of the mixture consist of air. Thereafter, two parts by ~-weight of the polyether polyol mixture are thoroughly mixed with one ~rt by weight of a polyisocyanate and after the metal skeleton for the steering wheel has been installed in the foaming mold and the latter has been closed the foamable reaction mixture is injected into the mold cavity in such a manner that the free part of the mold cavity is just com-pletely occupied by the resulting flexible PUR integral foam. Before the metal skeleton is installed in the foaming mold, a release agent is sprayed into the mold to coat its ~ ;
inside surface. The foaming mold is opened about 3 minutes after the injection of the foamable reaction mixture and the steering wheel, which is sheathed by a flexible layer of PUR
integral foam, is taken from the mold.
,'.,"''.
" ~"''.
' '~ '"
Claims (5)
1. A process of manufacturing shaped articles of flexible polyurethane (PUR) integral foam, which is foamed in a mold to and has a cellular core, which merges outwardly into a tough closed skin, which process comprises a polyaddition of a polyol and an isocyanate in the presence of water with release of expanding and foam-forming carbon dioxide, characterized in that 40 to 60% by volume air, 0.05 to 2.5% by weight water and 0.25 to 2.0% by weight of at least one of the hydrocarbons having 1 to 6 carbon atoms are incorporated in the polyol.
2. A process according to claim 1, characterized in that pentane is used as the hydrocarbon.
3. A process according to claim 1, characterized in that the hydrocarbons having 1 to 6 carbon atoms are replaced entirely or in part by other low-boiling organic solvents which may be used individually or in combination.
4. A process according to claim 1, characterized in that n-pentane and its isomers is used as the hydrocarbon.
5. A process according to claim 1, characterized in that the hydrocarbons having 1 to 6 carbon atoms are replaced entirely or in part by ethers, ketones, and esters, which may be used individually or in combination.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4301221.3 | 1993-01-19 | ||
| DE4301221A DE4301221A1 (en) | 1993-01-19 | 1993-01-19 | Process for the production of molded parts from flexible integral polyurethane foam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2113509A1 true CA2113509A1 (en) | 1994-07-20 |
Family
ID=6478438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002113509A Abandoned CA2113509A1 (en) | 1993-01-19 | 1994-01-14 | Process of manufacturing shaped articles of flexible polyurethane integral foam |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0608023B1 (en) |
| JP (1) | JPH06298980A (en) |
| KR (1) | KR100210863B1 (en) |
| AT (1) | ATE157680T1 (en) |
| BR (1) | BR9400144A (en) |
| CA (1) | CA2113509A1 (en) |
| CZ (1) | CZ10694A3 (en) |
| DE (2) | DE4301221A1 (en) |
| ES (1) | ES2107735T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4440212A1 (en) * | 1994-11-10 | 1996-05-15 | Basf Schwarzheide Gmbh | Process for the production of cellular polyurethanes |
| DE19647088A1 (en) * | 1996-11-14 | 1998-05-28 | Bayer Ag | Process for the production of hard polyurethane moldings with an integral structure |
| DE10203701C1 (en) * | 2002-01-31 | 2003-12-04 | Hennecke Gmbh | Process for the production of polyurethane foam with adjustable cell structure |
| US20050113470A1 (en) * | 2003-11-25 | 2005-05-26 | Honeywell Corporation | Mixtures of hydrofluorcarbons and acids as foam blowing agents |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1002108A7 (en) * | 1988-07-12 | 1990-07-03 | Recticel | Process for the preparation of a highly resilient polyurethane foam. |
| US5081162A (en) * | 1989-02-27 | 1992-01-14 | Woodbridge Foam Corporation | Process for producing foamed polymers |
| HU210404B (en) * | 1989-04-24 | 1995-04-28 | Huetzen | Process for producing polyurethane foam free of halogenated hydrocarbons |
| US5120771A (en) * | 1989-09-13 | 1992-06-09 | Hickory Springs Manufacturing Co. | Process for the production of polyurethane foam |
| GB2244714B (en) * | 1990-05-31 | 1993-10-06 | Sanyo Chemical Ind Ltd | Foamed polyurethane-forming composition,foamed polyurethane and process for making the same |
-
1993
- 1993-01-19 DE DE4301221A patent/DE4301221A1/en not_active Withdrawn
-
1994
- 1994-01-14 DE DE59403896T patent/DE59403896D1/en not_active Revoked
- 1994-01-14 ES ES94200084T patent/ES2107735T3/en not_active Expired - Lifetime
- 1994-01-14 CA CA002113509A patent/CA2113509A1/en not_active Abandoned
- 1994-01-14 EP EP94200084A patent/EP0608023B1/en not_active Revoked
- 1994-01-14 AT AT94200084T patent/ATE157680T1/en not_active IP Right Cessation
- 1994-01-18 KR KR1019940001008A patent/KR100210863B1/en not_active IP Right Cessation
- 1994-01-18 CZ CZ94106A patent/CZ10694A3/en unknown
- 1994-01-19 JP JP6019012A patent/JPH06298980A/en active Pending
- 1994-01-19 BR BR9400144A patent/BR9400144A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| BR9400144A (en) | 1994-08-09 |
| CZ10694A3 (en) | 1994-08-17 |
| ES2107735T3 (en) | 1997-12-01 |
| DE59403896D1 (en) | 1997-10-09 |
| DE4301221A1 (en) | 1994-07-21 |
| KR100210863B1 (en) | 1999-07-15 |
| EP0608023B1 (en) | 1997-09-03 |
| JPH06298980A (en) | 1994-10-25 |
| EP0608023A1 (en) | 1994-07-27 |
| KR940018408A (en) | 1994-08-18 |
| ATE157680T1 (en) | 1997-09-15 |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Discontinued |