EP3177679A1 - Procédé de production d'une mousse de polyuréthane souple - Google Patents

Procédé de production d'une mousse de polyuréthane souple

Info

Publication number
EP3177679A1
EP3177679A1 EP14748194.9A EP14748194A EP3177679A1 EP 3177679 A1 EP3177679 A1 EP 3177679A1 EP 14748194 A EP14748194 A EP 14748194A EP 3177679 A1 EP3177679 A1 EP 3177679A1
Authority
EP
European Patent Office
Prior art keywords
polyurethane foam
polyurethane
gel
time
foaming
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.)
Withdrawn
Application number
EP14748194.9A
Other languages
German (de)
English (en)
Inventor
Karl Rametsteiner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Breckle Chemicals & Technics GmbH
Original Assignee
Breckle Chemicals & Technics GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Breckle Chemicals & Technics GmbH filed Critical Breckle Chemicals & Technics GmbH
Publication of EP3177679A1 publication Critical patent/EP3177679A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C08G2110/00—Foam properties
    • C08G2110/0008—Foam properties flexible

Definitions

  • the invention relates to a process for producing a soft polyurethane foam with a polyurethane gel embedded in the cell walls or cell webs from reacting with one another during a given gel time, wherein the reaction components of the polyurethane foam, namely a polyol component and an isocyanate component, with the polyurethane gel and optionally with Additives are foamed using a blowing agent during a foaming time.
  • the reaction components of the polyurethane foam namely a polyol component and an isocyanate component
  • Additives are foamed using a blowing agent during a foaming time.
  • soft polyurethane foams as they are preferably mattresses, upholstery, seat covers u. Like., Are used to achieve a good pressure distribution, without endangering the air permeability, has already been proposed (WO 201 1/069928 A2), for example, to store a polyurethane gel in the cell walls or cell webs of the soft polyurethane foam.
  • a polyurethane gel obtained from corresponding reactants using a catalyst is mixed in a fine distribution either the reaction components comprising a polyol component and an isocyanate component or one of these reaction components before the foaming process, so that after the foaming process, the gel particles a part of the cell walls or Forming cell webs, whereby the physical properties of the polyurethane foam are changed in the sense of improved viscoelastic behavior, without disturbing the relevant for the air permeability open porosity.
  • Polyurethane gels based on reaction partners of polyols and polyisocyanates are known (EP 0 51 1 570 A1) and usually contain a plurality of polyols in a specific ratio of the molecular weights as a coherent dispersion medium in which a polymer network covalently crosslinked by urethane bonds is dispersed ,
  • Such polyurethane gels have the advantage that their viscoelastic properties can be changed between a gelatinous state and a solid gel by varying the isocyanate index and the functionality of the starting materials, and thus can be adapted to different requirements. In addition, they have a high stability even at higher temperatures, because the polyol is firmly bound as a dispersant in the gel.
  • a disadvantage, however, is that the separately produced polyurethane gel must be finely divided homogeneously added to the reaction components of the polyurethane foam, which is complicated and difficult due to the viscoelastic properties. Presentation of the invention
  • the invention is therefore based on the object to provide a simple method for producing a soft polyurethane foam with inclusions of a polyurethane gel to improve the viscoelastic properties.
  • the invention solves this problem by admixing the premixed reaction partners of the polyurethane gel to at least one reaction component of the polyurethane foam before the gelation time has elapsed and reacting within the foaming time of the polyurethane foam.
  • the reaction partners of the polyurethane gel do not leach during the foaming of the reaction components of the polyurethane, the difficulties associated with producing finely divided gel particles and with the homogeneous mixing of these gel particles into the reaction mixture of the polyurethane foam are eliminated. Rather, the gel particles are finely dispersed during their formation in the polyurethane backbone formed during foaming with the Effect incorporated, that the viscoelastic properties of the polyurethane foam produced in this way are improved in terms of a beneficial for a body support distribution of a compressive load, as can be expected for a continuous viscoelastic layer, but without the disadvantage of caused by these layers air barrier.
  • the open porosity of the soft polyurethane foam remains so because of the incorporation of the gel particles in the cell walls and cell walls completely preserved.
  • the gelation of the polyurethane gel with respect to the foaming process of the polyurethane foam to be produced should be completed in time to achieve a good gel incorporation into the cell walls and cell webs.
  • the gelling be timed so that the gelling time of the reactants of polyurethane gel ends before the expiration of two-thirds of the foaming time of the polyurethane foam, preferably within a period between one fifth and one third of the foaming.
  • polyether polyols which are obtained by addition of ethylene oxide and propylene oxide to a starter molecule. They are listed in the following table. TMP stands for trimethylolpropane.
  • a mixture of 60 parts by weight of polyol 1, 105 parts by weight of polyol 2 and 135 parts by weight of polyol 3 was homogeneously mixed with 38 parts by weight of a methylene diisocyanate 1 (MDI) containing 29% NCO. If 1 part by weight of a catalyst of 1,4-diazabicyclo [2.2.2] octane as a 33% strength by weight dispersion in dipropylene glycol (DABCO 33%) is added to this mixture, a polyurethane gel is obtained in a gel time of 40 s. This gelling time is reduced to 18 s if, in addition, 1 part by weight of tin octoate is added as an additional catalyst.
  • MDI methylene diisocyanate 1
  • the mixed in a premix head reaction mixture for a polyurethane gel was after the admixture of DABCO 33% and stannous octoate as catalysts within 10 s, ie within about 56% of the determined gel time 18s, in a main mixing head with a total of 2800 parts by weight of the reaction components blended for the soft polyurethane foam and applied within a total of 15 s, ie within 80% of the gel time, on a conveyor belt for block foaming.
  • reaction components for the soft polyurethane foam was a mixture of 75 parts by weight of polyether polyol having predominantly primary hydroxyl end groups based on trimethylolpropane having an OH number of 185 mg KOH / g, 20 parts by weight of a trifunctional polyether polyol with alternating C 2 and C 3 polyoxyalkylene blocks with an OH No. of 33 mg KOH / g, of 5 parts by weight of a calcium carbonate having a particle size of 5 to 15 ⁇ m, of 0.7 parts by weight of urea (36% in water) as amine crosslinker, of 0.4 part by weight of sorbitol (33%).
  • hydroxyl crosslinker from 0.08 parts by weight DABCO 33% as a foaming catalyst, from 0.15 parts by weight of a tertiary amine ( ⁇ , ⁇ '-tetramethylhexamethylenediamine) as Foaming catalyst, from 0.06 parts by weight of a Zinnoktoats as a foaming catalyst, from 1, 2 parts by weight of a silicone foam stabilizer as a cell opener, from 1, 4 parts by weight of water as a blowing agent and from 39 parts by weight of toluene diisocyanate with an NCO index of 96 used.
  • the foaming time was 41 seconds until the glue was free.
  • these polyurethane foams without gel deposits have poor aeration properties, in particular due to the significant cell deformation under load, while the polyurethane foam according to the invention, the open-cell structure is largely retained even under load.
  • the temperature dependence of the viscoelasticity of polyurethane foams according to the invention in a temperature range between 15 ° C. and body temperature, which is of interest for the use of mattresses, is low compared with the comparative foams.

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

L'invention concerne un procédé de production d'une mousse de polyuréthane souple, comportant un gel de polyuréthane incorporé dans les parois cellulaires ou nervures cellulaires, à partir de réactifs réagissant pendant un temps de gélification prédéterminé ; on fait mousser les composants réactifs de la mousse de polyuréthane, c'est-à-dire un composant polyol et un composant isocyanate, avec le gel de polyuréthane et éventuellement avec des additifs en utilisant un agent moussant pendant un temps de moussage. Selon l'invention, pour créer des conditions de fabrication avantageuses, les réactifs prémélangés du gel de polyuréthanne mélangés sont ajoutés à au moins un composant de réaction de la mousse de polyuréthane avant la fin du temps de gélification et réagissent pendant le temps de moussage de la mousse de polyuréthane.
EP14748194.9A 2014-08-04 2014-08-04 Procédé de production d'une mousse de polyuréthane souple Withdrawn EP3177679A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/066710 WO2016019972A1 (fr) 2014-08-04 2014-08-04 Procédé de production d'une mousse de polyuréthane souple

Publications (1)

Publication Number Publication Date
EP3177679A1 true EP3177679A1 (fr) 2017-06-14

Family

ID=51298751

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14748194.9A Withdrawn EP3177679A1 (fr) 2014-08-04 2014-08-04 Procédé de production d'une mousse de polyuréthane souple

Country Status (2)

Country Link
EP (1) EP3177679A1 (fr)
WO (1) WO2016019972A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111605116A (zh) * 2020-06-11 2020-09-01 泉州耐优防护用品有限公司 一种具有蜂巢孔状浇灌发泡软体内垫的护膝垫的生产工艺

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9080051B2 (en) * 2009-02-27 2015-07-14 Peterson Chemical Technology, Inc. Gelatinous triblock copolymer elastomer particles in polyurethane flexible foams
ATE544806T1 (de) * 2009-12-08 2012-02-15 Recticel Verfahren zur herstellung von flexiblem, elastischem polyurethanschaum und damit erhaltener schaum
AT510155B1 (de) * 2010-08-17 2012-02-15 Sembella Gmbh Verbundstoff aus einem polyadditionspolymer
ITPD20110164A1 (it) * 2011-05-23 2012-11-24 New Wind S R L Materiale composito per la realizzazione di articoli di poliuretano addizionato con gel siliconico e relativo procedimento.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016019972A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111605116A (zh) * 2020-06-11 2020-09-01 泉州耐优防护用品有限公司 一种具有蜂巢孔状浇灌发泡软体内垫的护膝垫的生产工艺
CN111605116B (zh) * 2020-06-11 2022-06-28 泉州耐优防护用品有限公司 一种具有蜂巢孔状浇灌发泡软体内垫的护膝垫的生产工艺

Also Published As

Publication number Publication date
WO2016019972A1 (fr) 2016-02-11

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