WO1996011219A1 - Polyurethane composition - Google Patents
Polyurethane composition Download PDFInfo
- Publication number
- WO1996011219A1 WO1996011219A1 PCT/GB1995/002289 GB9502289W WO9611219A1 WO 1996011219 A1 WO1996011219 A1 WO 1996011219A1 GB 9502289 W GB9502289 W GB 9502289W WO 9611219 A1 WO9611219 A1 WO 9611219A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- isocyanate
- prepolymer
- polyol
- resin mixture
- polymeric polyol
- Prior art date
Links
Classifications
-
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2110/00—Foam properties
- C08G2110/0041—Foam properties having specified density
- C08G2110/0066—≥ 150kg/m3
-
- 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
- C08G2350/00—Acoustic or vibration damping material
Definitions
- This invention relates to microcellular polyurethane products that have application as engineering components such as spring assisters, buffers, vibration isolators and the like.
- microcellular polyurethane products are manufactured by forming a prepolymer or quasi-prepolyer from the total or partial reaction of a high molecular weight polyhydroxy component such as a polyester or polyether with naphthalene di- isocyanate (NDI).
- NDI naphthalene di- isocyanate
- the prepolymer or quasi- prepolymer is then reacted with water, a glycol, a catalyst together with appropriate additives to produce a microcellular material.
- NDI naphthalene di- isocyanate
- vapour pressure of NDI at the normal processing temperature is sufficiently high to give rise to the emission of toxic vapours.
- the relatively long in-mould time required to produce the microcellular polyurethane which leads to high production cost and equipment cost.
- MDI 4,4'-di-phenylmethane di- isocyanate
- Moulded products made by casting or pouring method and by high pressure impingement mixing had inferior compression set and inferior performance under dynamic compressive stress.
- Spring assisters in motor vehicles suspension applications are also required to meet very precise stress strain characteristics, which means that the density and modulus of the material must be controlled within very close limits. With conventional processes this can only be achieved with a limited number of moulding techniques.
- a method of manufacturing a microcellular polyurethane comprising reacting a polymeric polyol having a molecular weight of at least 1000, a diol or diamine having from 2 to 20 carbon atoms and 4,4'-di-phenylmethane di-isocyanate (MDI) to produce a polyurethane having a density of from 0.3 to 0.7 g/cc.
- MDI 4,4'-di-phenylmethane di-isocyanate
- a prepolymer or quasi-prepolymer is formed from the poly ⁇ ieric polyol which is preferably a diol, triol or tetrol having a molecular weight of at least 1000 and the MDI.
- the prepolymer is then reacted with a resin mixture formed from a pclymeric polyol which is preferably the same as the polymeric polyol used to form the prepolymer and the diol or diamine having 2 to 20 carbons.
- the resin mixture may also include additives such as chain extenders, catalysts, surface active agents, blowing agents and the like.
- the equivalent weight of the resin mixture, expressed as mg of KOH per gram of material is preferably in the range 200 to 300.
- a preferred procedure for carrying out the invention to produce moulded products is as follows:-
- Pre-heating (i) a prepolymer comprising the di-isocyanate and a polymeric polyol and (ii) a resin mixture of a polymeric polyol together with a diol or diamine having from 2 to 20 carbons, a chain extender, one or more catalysts, one or more surface- active agents, a blowing agent and other additives as may be required by technical or commercial considerations.
- the injection moulded component may require no after treatment other than to remove sprue.
- the polymeric polyol is, as already stated, one having a molecular weight of at least 1000, preferably about 2000.
- Preferred polymeric polyols are difunctional polyester polyols having an equivalent weight of about 110, such as poly (hexamethylene) adipate, poly (butylene) adipate and poly (epsilon caprolactone), and polyether polyols such as poly (propylene) oxide and poly (tetramethylene) glycol. Combinations and co- polymers of more than one polymeric polyol can be used if desired.
- the di-isocyanate used in the invention is preferably an alkyl or aryl substituted alkyl di-isocyanate such as 4,4'-diphenylmethane di- isocyanate (MDI).
- MDI 4,4'-diphenylmethane di- isocyanate
- the amounts of di-isocyanate and polyol used are preferably in the molar range 2:1 to 5:1, more particularly 2.4:1 to 5:1 di-isocyanate to polyol.
- the preferred range of isocyanate groups to isocyanate reacting compounds is from 0.85:1 to 1.15:1.
- Additives which are preferably included in the reaction mixture include one or more catalysts which are preferably secondary or tertiary amines, organometallic compounds such as organic tin compounds. By choosing the appropriate catalyst the cure time in the mould can be varied from twenty minutes to about three minutes. Using the same catalyst type the density of the product can be adjusted within the range 0.35 to 0.70 g/cc.
- Particularly preferred catalysts include an amine salt sold under the name "Dabco" 33LV and an organotin compound sold under the name "Dabco” F12CL.
- Other additives include sufactants, preferably non- silicone surfactants (because use of silicone will detract from the achievements of isotropy of the cells), antioxidants, bacteriostatic compounds and pigments. In the Examples all parts or percentages are by weight.
- a quasi-prepolymer containing 20 to 22 wt% isocyanate group was prepared by the reaction between a polycaprolactone having an equivalent weight of approximately 1100 and 4,4'-diphenylmethane di- isocyanate.
- the prepolymer was kept at a temperature of 42°C.
- a resin mixture of the above polyester, 1,4- butane diol, water, tertiary amine catalyst, organometallic tin catalyst and a surface active agent was prepared and maintained at a temperature of 45°C.
- the resin mixture was formulated to give an equivalent weight of 270.
- Example I The process of Example I was repeated, but a polyol (resin) mixture having an equivalent weight of 230 and with 112 parts of prepolymer was mixed with 100 parts of polyol mixture (resin). Mouldings were produced as in Example I.
- the density of the material was 250 kg/m 5 (moulded parts having a density of 450, 550 and 650 kg/m 3 could easily be produced from the same mixture with a demould time of less than 5 minutes).
- the mouldings were then post cured for 12 hours at 90°C.
- a quasi-prepolymer containing 14 to 16 wt% isocyanate groups was prepared by the reaction between a polyether glycol (PTMEG) having an equivalent weight of approximately 1100 and 4,4'- diphenylmethane di-isocyanate.
- PTMEG polyether glycol
- the quasi-prepolymer was kept at a temperature of 40°C.
- a resin mixture of the above polyether 1,4- butane diol, water, tertiary amine catalyst, organometallic tin catalyst and a surface active agent was prepared and maintained at a temperature of 40°C.
- the resin mixture was formulated to give an equivalent weight of 260.
- the mouldings were then post cured for 6 hours at 90°C.
- a quasi-prepolymer containing 14 to 16 wt% isocyanate group was prepared by the reaction between a polyethylene/butylene adipate having an equivalent weight of approximately 1050 and 4,4'-diphenylmethane di-isocyanate.
- the prepolymer was kept at a temperature of 40°C.
- a mixture of the above polyester linear and branched, 1,4-butane diol, water, tertiary amine catalyst, organometallic tin catalyst and surface active agent was pre-poured and maintained at 40°C.
- the above mixture was formulated to give an equivalent weight of 240.
- the density of the free foam was 230 kg/m J .
- Moldded parts having a density of 450,550 and 650 kg/m 3 could easily be produced from the same mixture with a demould time of less than 5 minutes).
- the mouldings were then post-cured for 16 hours at 90°C.
- a dynamic fatigue test was carried out on a moulded product as illustrated in the accompanying drawing which shows an axial section through a typical spring assistor for a motor vehicle suspension.
- the part was made in each of the Example formulations.
- the part density was approximately 500 kg/m 3 .
- the test comprised 200,000 compression cycles at 2HZ at a load of 4KN. On completion of test, the part showed that the permanent set did not exceed 5% and there was no evidence of any splits or cracks, internally or externally.
- microcellular polyurethane products and particularly vehicle suspensions spring aids and jounce bumpers can be obtained in any desired internal and external configuration using high or low pressure liquid injection moulding technique, casting or othei fluid moulding techniques.
- an advantage of the invention is that by the use of any of the conventional polyurethane dispensing machinery, articles can be produced by introducing the liquid mixture into closed moulds, thus atmospheric contamination by di-isocyanates can be more easily controlled and also the production cycle time can be reduced without incurring other processing penalties.
- the invention permits the production of a wide range of part weights and configurations over a range of densities from 0.45 to 0.70 cc without any changes or adjustment to the process parameters or to the reacting mixtures.
- the physical and dynamic properties of the moulded products are of a level which have not been achieved hitherto with MDI as the isocyanate.
Landscapes
- 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)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9509282A BR9509282A (en) | 1994-10-05 | 1995-09-27 | Manufacturing process of a microcellular polyurethane |
AU35308/95A AU3530895A (en) | 1994-10-05 | 1995-09-27 | Polyurethane composition |
JP8512402A JPH10507218A (en) | 1994-10-05 | 1995-09-27 | Polyurethane composition |
CZ971039A CZ103997A3 (en) | 1994-10-05 | 1995-09-27 | Process for preparing micro-porous polyurethane foam |
EP95932132A EP0784640A1 (en) | 1994-10-05 | 1995-09-27 | Polyurethane composition |
KR1019970702259A KR970706325A (en) | 1994-10-05 | 1997-04-07 | Urethane composition manufacturing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9420107A GB9420107D0 (en) | 1994-10-05 | 1994-10-05 | Polyurethane composition |
GB9420107.6 | 1994-10-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996011219A1 true WO1996011219A1 (en) | 1996-04-18 |
Family
ID=10762399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1995/002289 WO1996011219A1 (en) | 1994-10-05 | 1995-09-27 | Polyurethane composition |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0784640A1 (en) |
JP (1) | JPH10507218A (en) |
KR (1) | KR970706325A (en) |
CN (1) | CN1167494A (en) |
AU (1) | AU3530895A (en) |
BR (1) | BR9509282A (en) |
CA (1) | CA2201929A1 (en) |
CZ (1) | CZ103997A3 (en) |
GB (1) | GB9420107D0 (en) |
PL (1) | PL319722A1 (en) |
WO (1) | WO1996011219A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006089890A1 (en) * | 2005-02-22 | 2006-08-31 | Basf Aktiengesellschaft | Cylindrical mouldings based on cellular polyurethane elastomers |
WO2006089891A1 (en) * | 2005-02-22 | 2006-08-31 | Basf Aktiengesellschaft | Process for producing cylindrical mouldings based on cellular polyurethane elastomers |
WO2009112576A1 (en) * | 2008-03-14 | 2009-09-17 | Basf Se | Coarse-cell polyurethane elastomers |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2002225369A1 (en) * | 2000-12-27 | 2002-07-08 | Hitachi Chemical Co., Ltd. | Photobase generators, curable compositions prepared by using the same and process of curing |
JP4459711B2 (en) * | 2004-05-12 | 2010-04-28 | 日本ポリウレタン工業株式会社 | Rail pad manufacturing method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534551A (en) * | 1966-12-06 | 1968-07-26 | Elastomer Ag | Process for obtaining highly elastic, tear-resistant and cold-resistant cellular polyurethane materials having a relatively high specific weight |
US3856716A (en) * | 1971-03-10 | 1974-12-24 | Laporte Industries Ltd | High density polyurethane foams |
FR2257619A1 (en) * | 1974-01-11 | 1975-08-08 | Interox Chemicals Ltd | |
DE2940856A1 (en) * | 1979-10-09 | 1981-04-23 | Elastogran GmbH, 2844 Lemförde | METHOD FOR THE PRODUCTION OF POLYURETHANE ELASTOMERS WHICH MAY CONTAIN CELLS |
WO1991017197A1 (en) * | 1990-05-04 | 1991-11-14 | Dow Italia S.P.A. | Microcellular polyurethane polymers prepared from isocyanate-terminated poly(oxytetramethylene) glycol prepolymers |
EP0496204A2 (en) * | 1991-01-25 | 1992-07-29 | BASF Aktiengesellschaft | Process for the preparation of cellular polyurethane elastomers using polyethercarbonates as starting material |
-
1994
- 1994-10-05 GB GB9420107A patent/GB9420107D0/en active Pending
-
1995
- 1995-09-27 CZ CZ971039A patent/CZ103997A3/en unknown
- 1995-09-27 PL PL95319722A patent/PL319722A1/en unknown
- 1995-09-27 JP JP8512402A patent/JPH10507218A/en active Pending
- 1995-09-27 AU AU35308/95A patent/AU3530895A/en not_active Abandoned
- 1995-09-27 BR BR9509282A patent/BR9509282A/en not_active Application Discontinuation
- 1995-09-27 WO PCT/GB1995/002289 patent/WO1996011219A1/en not_active Application Discontinuation
- 1995-09-27 CN CN95196447A patent/CN1167494A/en active Pending
- 1995-09-27 CA CA002201929A patent/CA2201929A1/en not_active Abandoned
- 1995-09-27 EP EP95932132A patent/EP0784640A1/en not_active Ceased
-
1997
- 1997-04-07 KR KR1019970702259A patent/KR970706325A/en not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534551A (en) * | 1966-12-06 | 1968-07-26 | Elastomer Ag | Process for obtaining highly elastic, tear-resistant and cold-resistant cellular polyurethane materials having a relatively high specific weight |
US3856716A (en) * | 1971-03-10 | 1974-12-24 | Laporte Industries Ltd | High density polyurethane foams |
FR2257619A1 (en) * | 1974-01-11 | 1975-08-08 | Interox Chemicals Ltd | |
DE2940856A1 (en) * | 1979-10-09 | 1981-04-23 | Elastogran GmbH, 2844 Lemförde | METHOD FOR THE PRODUCTION OF POLYURETHANE ELASTOMERS WHICH MAY CONTAIN CELLS |
WO1991017197A1 (en) * | 1990-05-04 | 1991-11-14 | Dow Italia S.P.A. | Microcellular polyurethane polymers prepared from isocyanate-terminated poly(oxytetramethylene) glycol prepolymers |
EP0496204A2 (en) * | 1991-01-25 | 1992-07-29 | BASF Aktiengesellschaft | Process for the preparation of cellular polyurethane elastomers using polyethercarbonates as starting material |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006089890A1 (en) * | 2005-02-22 | 2006-08-31 | Basf Aktiengesellschaft | Cylindrical mouldings based on cellular polyurethane elastomers |
WO2006089891A1 (en) * | 2005-02-22 | 2006-08-31 | Basf Aktiengesellschaft | Process for producing cylindrical mouldings based on cellular polyurethane elastomers |
US7985780B2 (en) | 2005-02-22 | 2011-07-26 | Basf Se | Cylindrical mouldings based on cellular polyurethane elastomers |
WO2009112576A1 (en) * | 2008-03-14 | 2009-09-17 | Basf Se | Coarse-cell polyurethane elastomers |
US8642670B2 (en) | 2008-03-14 | 2014-02-04 | Basf Se | Coarse-cell polyurethane elastomers |
Also Published As
Publication number | Publication date |
---|---|
CZ103997A3 (en) | 1997-11-12 |
PL319722A1 (en) | 1997-08-18 |
AU3530895A (en) | 1996-05-02 |
BR9509282A (en) | 1997-11-18 |
KR970706325A (en) | 1997-11-03 |
GB9420107D0 (en) | 1994-11-16 |
EP0784640A1 (en) | 1997-07-23 |
JPH10507218A (en) | 1998-07-14 |
CA2201929A1 (en) | 1996-04-18 |
CN1167494A (en) | 1997-12-10 |
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