DE2042636A1 - Process for the production of polyurethane foams - Google Patents

Description

DA-6626

Description of the

Patent application
of

Vladimirsky nautschno-issledovatelsky institute synthetic smol

SSSR, Vladimir, uliza Frunze, 77

concerning

TERi ¹ AHHEN FOR THE MANUFACTURE OF POiYURETHANE SLUMPANTS

The present invention relates to methods for the production of Schaui ^ olyur ethane », which is in various Branches of industry, e.g. in the textile, furniture, automotive industry, in cooling technology as a thermal insulation material, etc. is widely used.

There are known processes for the production of foam ^ polyurethane: *! by converting diisocyanates or their Mixtures with polyisocyanates, polyethers or polyesters with water in the presence of tertiary amine as a catalyst (see Saunders J.H., Frish K.C. "Polyurethanes", Chemistry and Technology, p. I and II, Interscience Publishers New York-London, 1964).

The tertiary amines used in the known processes are e.g. dimethylaminopyridine, diazobicyclic octane (the latter preferably as catalytically particularly active »«) ·

209810/1566

- 2 - *

A disadvantage of the known method is that the tertiary amines used as catalysts are expensive in a number of cases because their synthesis is quite complicated is (e.g. that of the diazobicyclic octane)} others used tertiary amines are toxic, e.g. dimethylaminopyridine.

The aim of the present invention is to eliminate the disadvantage mentioned

The invention was based on the object of replacing the known tertiary amines with another of the mentioned Disadvantages of replacing free tertiary amine in the process for the production of foam polyurethane, which is described in the Conversion of diisocyanates or their mixtures with polyisocyanates, Polyethers or polyesters with water in the presence of tertiary amine as a catalyst.

This object is achieved according to the invention in that 1,2-dimorpholine ethane is used as the tertiary amine

GHo "" "GHq C / xip ■ · - OH-O

0 N- GH ₀ GH ₀ - N 0

GH / p - GHp GHp - GHp

used in an amount of 0.05-2 parts by weight per 100 parts by weight of polyether or polyester.

The above-mentioned tertiary amine advantageously differs in its toxicological properties from the known

209810/1666

ten tertiary amines * Even compared to the relatively little toxic diazabicyclooctane, it is half as toxic, less volatile and does not cause irritation to humans Skin off. This creates better working conditions for the production of foam polyurethane and for its use

created
the! the latter is most volatile.

linethane cheaper than diazabicyclooctane

Elastic, semi-rigid and rigid foam polyurethanes can be produced by the process according to the invention.

It is expedient to use in the process mentioned

uials Diisozyanate a mixture of 2,4- and 2,6-2Olylenendiiso-

cyanates,

stop _v «^
To the erxxflckorag: from foamedfoolyurethane- with more homogeneous

finely porous / structure as well as for the production of elastic Foam ^ olyurethane the process is expedient in the presence carried out by surface-active water-soluble non-ionic substances.

When using Jan.FRfMTgS. used by polyesters the reaction products of alkylene oxides with alkyl phenols are expediently used as surface-active substances. When using of polyethers, organic water-soluble silicon compounds are expediently used as surface-active substances, like silicones.

In the cases when for the production of foamed polyurethanes a particularly effective catalytic system

209810/1 568

is appropriate, the process is expediently carried out in the presence of organic tin compounds of the general formula (RCOO) pSn or (IdOOO) ₂ SnB ₂ , where R is an aliphatic radical

The 1,2-Dimorpholi: üäthan in combination with the organic Tin compounds of the above formulas have a strong catalytic effect and are in the catalytic Activity hardly inferior to that of diazobicyclic octane in combination with the same organic tin compounds.

To reduce the volume weight of the Schäunj ^ olyurethane obtained, the process is expediently carried out in the presence of halogenated hydrocarbons through

The process according to the invention for the production of foam polyurethanes * is carried out according to the usual technology used for the latter

Isocyanate components are used in the above Process different diisocyanates ζ · Β · a mixture of 2,4- and 2,6-TolyuJendiisozyanaten, preferably with a weight, Molecular and percentage ratio deE of the latter of 00:20 or 65-35 or the reaction product of an excess of 2,4-tolylene diisocyanate or a mixture of the 2,4- and 2,6-tolyylene diisocyanates with low molecular weight diols with 2 to 6 carbon atoms

Mixtures of the diisocyanates with the polyisocyanates, for example a mixture of 4.4 ^I -diphenylmethanediisozyanate with poly-methylene polyphenylene, can also be used as isocyanate components.

209810/1 see

isocyanates (product "Desmodur 44 V" from Bayer, Federal Republic Germany; Product "Suprasec DN" from the company ΙΟΙ, England etc.) can be used «

In the process according to the invention, polyethers and polyesters are used, which are usually used in the production of foam polyurethane. Polyethers based on propylene oxide (of the type "Desmophen 340O"&&? From Bayer, Federal Republic of Germany, or ¹¹ DeItοcell 'J3-56 ¹¹ from IGI, England; or copolymers of propylene oxide and tetrahydrofuran, or copolymers of Ethylene oxide and propylene oxide etc. can be used

the_
As polyester, for example, Y adipate of diethylene glycol or glycerine andV sebacate of glycerine can be used »

As surface-active water-soluble non-ionic substances In the process according to the invention, reaction products of the alkylene oxides with alkylphenols, e.g. the reaction product of ethylene oxide can be used with the p- (tert-butyl) phenol. They can also be used as surface-active substances various water-soluble organic silicon compounds, silicones, e.g. block copolymers of ethylene and propylene oxide with polydimethylsiloxanes (silicones of the type L-520 from Union Carbide, USA or DC-19Ö from Dow Corning, USA) can be used.

In the process according to the invention, as organic tin compounds of the general formulas mentioned above, e.g.

+ registered trademarks

209810/1566

Tin octoate, diethyl tin diaprylate, dibutyl tin dilaurate, etc. uses v / erderio

Halohydrocarbons that can be used in the process according to the invention are, for example, trichlorofluoromethane, ethylene chloride, Trifluorotrichloroethane, etc. can be used.

From the diisocyanates or their mixtures with the polyisocyanates, Polyethers and polyesters, water, 1,2-dimorpholinoethane, surface-active water-soluble non-ionic substances, organic tin compounds of the above-mentioned general Formulas and halogenated hydrocarbons are prepared by table a composition with the help of conventional equipment, which are applied in the manufacture of foams, or by hand · The preparation of the composition is done at room temperature carried out·

Absolutely necessary components of the composition are diisocyanates or their mixtures with the polyisocyanates, Polyether or polyester, water and 1,2-dimorpholinoethane. The other of the components mentioned are used when preparing the composition to achieve additional effects, which are mentioned above. In addition, additions of various substances, which are usually used in the Manufacture of Schaumj ^ olyurethanea are used, too to achieve this or that additional effect. This is how you lead into the composition, for example triethanolamine to increase the rigidity of the foam produced

2Q9S10 / 1B66

The prepared composition is quickly poured into a cardboard, Rietall or plastic mold or a channel that by a belt of paper moved with the aid of a plate conveyor is formed, where it comes to foaming and hardening of the composition with the formation of foam. At right With the chosen formulation of the composition, the foam obtained has a uniform, finely dispersed structure without cracks and voids and has good physical-mechanical properties.

For a better understanding of the present invention, the following examples of the preparation of Foam polyurethanes listed.

Example 1.

A composition is prepared on a "high pressure" machine used in industry according to the following Recipe (in parts by weight):

Polyether triol based on

Propylene oxide (molecular weight 3000) x 100

Mixture of 2,4- and 2,6 tolyseediisocyanates at a weight ratio

of the isomers of 00:20 47

1,2-dimorpholinoethane ... 0.25

divalent tin octoate 0.3

Block copolymer of ethylene and propylene oxide with polydimethylsiloxane (silicone) of the general formula ϊ

209810 / 1Βββ

- Si rO-Si-O (0H ₂ -0H ₂ -0) ₁₇ - (GH-GH ₂ -O-) ₁₃ ~ G ₄ H ₉ /

Water 3t

The mixing chamber of the head of the fascine will be following Components of the composition pumped with a polyether a feed rate of 22.45 kg / min; a mixture of the Tolyiendiisozyanate with a feed rate of 10.6 kg / min} a component that is a homogeneous solution of 1,2-Dimorpholinoäthan, block copolymers of ethylene and Represents propylene oxide with polydimethylsiloxane and water, at a feed rate of 1.078 kg / min; a component, the one solution of divalent tin octoate in polyether (the latter is in an amount of 1.5 parts by weight, based on the total amount of polyether specified in the formulation), with a feed rate of 0.40 kg / min. The capacity of the mixing chamber of the head of the machine is 1.2 1, the diameter of the Nozzle of the machine head 19 mm, the number of revolutions of the stirrer 3000 rpm.

The composition obtained after mixing all the components was through the nozzle of the machine head in poured the gutter, which by means of a plate conveyor

209810/1566

rers moving paper tape is formed. The incline of the conveyor was 5.5 cm / m and the speed of movement of the conveyor 3 m / min, the width of the paper channel 1 m.

Foaming and hardening of the Composition with the formation of foam. This foaming lasted 95 seconds.

A qualitative elastic * foam polyurethane was obtained under the stated conditions. For comparison the physical-mechanical characteristics of the foam polyurethane * obtained according to Example 1 and those of the foam polyurethane, de # on the same equipment and after the same Formulation, but using as a tertiary amine of the diazabicyclooctane, which is taken in the same amount as the 1,2-dimorpholinoethane, is listed,

Tabel

physical-mechanical parameters

Foam polyure foam polyurethane under ver than using 1,2- application of Dimorpholino-diazabicycloethane octane

Volume weight, kg / mr 209810/15 30.0 66 31.0 ρ
Tensile strength, kp / cm.
relative
daily elongation, %
remaining deformation 1.15
180.0 1.07
165.0 2Q ° C, squeeze around 50%), %. 3.3 5.1 Elasticity, % 49.0 47.0

Example 2 »

One prepares a composition on a laboratory scale "High pressure" machine according to the following recipe (in parts by weight):

Polyether triol based on

Propylene oxide (molecular weight 3000) 100

u
Mixture of 2,4- and 2,6-tolylenediisocyanates with a weight ratio of the isomers of 80:20 51.5

1,2-dimorpholinoethane "... 0.5

divalent tin octoate 0.4

Block copolymer of ethylene and propylene oxide with the polydimethylsiloxane (same

as in example 1) 1.5

Water 4.0

The mixing chamber of the head of the machine will be the following Components pumped into the composition:

a polyether at a feed rate of 1.2 kg / min; a mixture of the tolylene diisocyanates at a feed rate of 627 g / min; a component that is a homogeneous solution of 1,2-dimorpholinoethane, block copolymers of ethylene and is propylene oxide with the polydimethylsiloxane and water, at a feed rate of 73 g / min; a component that is a divalent tin octoate solution in the Polyether (the latter is 1.5 parts by weight

209810/1566

le, based on the total amount of polyether contained in the recipe is given), with a feed rate of 23 g / min

The capacity of the kischkamnier of the head of the machine is 0.06 1, the diameter of the nozzle of the machine head 10 mm, the number of revolutions of the stirrer 300 rpm.

The composition obtained after mixing all the components was turned into a Cardboard shape (boxes) with the dimensions of the bottom 1200 χ 400 mm and the height of the side walls poured 150 mm. Came in shape

Ground it to foam and harden the R8K $ & gä & X81 £ to form

of foam · Foaming took 100 seconds.

It became a high quality elastic foam polyurethane obtained with the following physical-mechanical characteristics:

Volume weight, kg / m- '..... · ... 28.0

Tensile strength, kp / cm ² 1.10

relative

mmSe elongation, % 220

Residual formation

(72 hours, 20 ⁰ C,

Compression by 50%),% ·. ·. ····. · 6.5 Elasticity,% 41.0

Example 3.

Dimensions
One prepares a: EönipOBää> i & DH with the help of a laborato-r

room stirrer, cdLer is operated at 1400 rpm, according to the following recipe (in parts by weight):

209 810 / 1B66

Polyether triol, which is a copolymer of Propylene oxide and tetrahydrofuran (molecular weight 3000) represents 100

u
Mixture of 2,4- and 2,6-l'olylenediiso-

cyanates at a weight ratio

of the isomers of Ü0: 20 · 40

1,2-dimorpholinoethane .... ·····. ·. · 0.05

divalent tin octoate 0.3

Block copolymer of ethylene and propylene oxide with polydimethylsiloxane (the same

as in example 1) 1

Water 3

First of all, the stirrer of 0.7 1 fit polyether and divalent tin octoate introduced and stirred for 10 seconds.

one

Then you put previously prepared homogeneous water in the beaker.

of

Serious solution νσοοαϊχχ surfactant and 1,2-dimorpholinoethane to, stir for 30 seconds, after which the

Mixture of the Toiylendiisozyanate was added. the was stirred for 10 seconds and in a

Cardboard shape (box) with the bottom dimensions 300 χ 200 mm and the height of the side walls 100 mm poured. In the i'orm

Dimensions

there was foaming and hardening of the RSSpSSSMSMi Formation of foam. The foam formation lasted 70 seconds

209810/1566

Is became a high quality elastic foam polyurethane obtained with the following physical-mechanical characteristics:

Volume weight, kg / m · '.... * 30.0

ρ
Tensile strength, kp / cm. X 1.5

% 230.0

Residual deformation

(J2 hours, 20 C,

Compression by 50%), % 4.0

Elasticity,% 35.0

Example 4.

Dimensions
kan prepares a * xanpcaE ± 5taxixi with the help of the in the

Example 3 according to the laboratory stirrer described the following recipe (in parts by weight):

Polyether triol, which is a copolymer of Ethylene oxide and tetrahydrofuran (molecular weight 3000) represents 100

Mixture of 2,4- and 2,6-tolylenediisocyanates with a weight ratio of the isomers of 65 ϊ 35 · · β · 39

1,2-dimorphoinoethane 0.05

divalent tin octoate ·. · ..... ·. · 0.3

Block copolymer of ethylene and propylene oxide with polydimethylsiloxane (same as in example 1) .... 1.5 water · · ... ·. · 3.0

209810/1566

Dimensions
The preparation and manufacture of the Jixanpeaeaxaxna

of the foam in the mold was as in Example 3 described carried out. The foam formation continued Seconds.

A qualitative elastic foam polyurethane with the following physical-mechanical characteristics was obtained:

Volume weight, kg / m ^ 3 «3.6

ρ
Tensile strength, kg / cm 1.5

relative

Elongation, % 157

Reside formation

KrfrGb (72 hours, 20 C,

Compression by 50%), % 1.3

Elasticity, % 34

Example 5 »

Dimensions

kan prepares a K8f & $ & 9XtX9K. using the laboratory stirrer described in example 3 according to the following recipe (in parts by weight):

Polyether triol based on

Propylene oxide (molecular weight 3000) 100

u
Mixture of 2,4- and 2,6-tolylenediisocyanates

nate at a weight ratio of 80:20 44

1,2-dimorpholinoethane 0.1

Diethyltin Dicaprylate 0.3

Block copolymer of ethylene and propylene oxide with polydimethylsiloxane (the same as described in Example 1) 1.0

Water .. ·. · 3.5

209810 / 1B66

Dimensions
The preparation of the % JM $ E3E & £ $ Xi & as well as the production of the

Foam in the mold was as described in Example 3, carried out · The foam formation took 105 seconds »

foan received a high quality elastic foam polyurethane with the following physical-mechanical parameters?

Volume weight, kg / m ^ ....... 33.2

ρ
Tensile strength, kp / cm .. ·. · 1.3

relative

SSSSg «S« elongation, % .... 218

permanent deformation _n

w & tw & waxogsssst (72 hours, 20 G, compression by 50%),% .. · ............... ·. 1.6

Elasticity, % 34

Example 6 »

Dimensions

R an prepares a 1üß »3pxflBä * 2bCHQ. with the help of the example 3 laboratory stirrer according to the following recipe (in parts by weight)!

Polyether triol based on Propylene oxide (molecular weight 3000) ......... 100 Mixture of 2,4- and 2,6-tolylene diisocyanates at a weight ratio of isomers

from 80:20 44

1,2-dimorpholinoethane .. ·. ··. · 0.1

divalent tin octoate,. 0.3

Block copolymer of ethylene and propylene oxide with polydimethylsiloxane (the same

as described in Example 1) 1.0

Water ". 3.5

Trichlorofluoromethane 10

20 9 810/1506

204263S

First of all, polyether, trichlorofluoromethane and divalent tin octoate are placed in the Eührer's lethal cup and stir for 10 seconds. The further mixing of the components and the production of the foam in the Mold was carried out as described in Example 3.

Foaming takes 200 seconds.

en ^ _Λ

iVicin received a qualitative elastic Schaunäjyolyure-

than with the following physical-mechanical parameters:

Volume weight, kg / m- '. 29> ü

ρ
Tensile strength, kp / cm 1.2

relative
3ax3uagB30x elongation, % 213

Deformation residue

(72 hours, 20 ⁰ C, access

press together by 50%),% 6.0

Elasticity, % , 24

Example 7 »

Dimensions

Prepare a K8H $ 83S £ X & SK with the help of the example 3 described in the laboratory according to the following recipe (in parts by weight):

Polyether triol, which is a copolymer of Propylene oxide and tetrahydrofuran (molecular weight 3000) represents 100

u
Mixture of the 2,4- and 2,6 ~ tolylene diisocyanates with a weight ratio of the isomers

from 80:20 39

1,2-dimorpholinoethane x 0.05

209810/1566

divalent tin octoate .............. c 0.4 block copolymer of ethylene and Propylene oxide with the polydimethylsiloxane

(same as in example 1) .1,5

Water 3> 0

¹ Ir if fluorotrichloroethane 10.0

Mass The preparation of the i & aKipBHabiraxaa as well as the manufacture

the foam in the j? orm was as described in example 6, carried out. Foaming took 145 seconds.

In an received a high quality elastic foam with the following physical-mechanical parameters:

Volume weight, kg / m- '33 »5

2
Tensile strength, kp / cm 1.2

txiiJ ^ SATbehnung,% 226

Deformation residue
JöfeaxßaaxBUDgsajssdx (72 hours, 20 C,

Compression by 50%), % 4.2

Elasticity, % 26

Example 8.

Dimensions

One prepares a ΚοίκροΘ & Ιχ & Ηχ: with the help of the

game 3 described laboratory-like stirrer after the the following recipe (in parts by weight):

Polyether triol, which is a copolymer of 1,2-butylene oxide and tetrahydrofuran (molecular weight 3500) is a mixture of 2,4- and 2,6- ^f i'olylenendiisozyana-

te at a weight ratio of Iso-209810/1566

kidneys from 80:20 39

1,2-dimorpholinoethane 0.05

divalent tin octoate 0.5.

Block copolymer of ethylene and propylene oxide with the polydimethylsiloxane (the same as described in Example 1) 1.5

Water 3.0

Dimensions
The preparation of the Κ & Ύφτη ^ Μχαα as well as the production of the

Foam in the mold was brushed as in Example 3, carried out. Foaming lasted 115 times.

Jüan received a high quality elastic foam polyurethane with the following physical-mechanical parameters:

Volume weight, kg / m ^ 3ö, 0

ρ
Tensile strength, kp / cm 1.3

relative

Elongation,% 156

| (72 hours, 20 ⁰ G, compression by 50%), % , .. · 2.0

Elasticity, % 22

Example 9 »

Dimensions

kan prepares a ^ δδ ^ β ^ ϊ ^^ κ with the help of the example 3 laboratory liquid stirrer according to the following recipe (in parts by weight):

Polyether triol, which is a copolymer of Represents propylene oxide with ethylene oxide (molecular weight 4800),

'20981 0/1566

Mixture of 4.4 ^t -diphenylmethane diisocyanate with the polymethylene polyphenylene isocyanates (weight ratio of the components of the mixture 70; 30; content of isocyanate group-

pen31.7%) 54

Triethanolamine 5

1,2-dimorpholinoethane 1 _sec 0

Water., 2.5

First of all, poly-

ether and triethanolamine introduced and for 10 seconds

Mass stirred. The triethanolamine was introduced into the BS2fflSgöSiW? $ X8i for Increasing the rigidity of the foam obtained. A previously prepared aqueous solution was then added to the beaker of 1,2-dimorpholinoethane added, stirred for 30 seconds, after which a mixture of the isocyanates was added.

Dimensions .

The ^: 55 © Sp? §S ^ S9ii was stirred for a further 10 seconds and poured into a cardboard mold, as described in Example 3. Foaming took 190 seconds.

Lan received a semi-rigid foam polyurethane with the following physical-mechanical parameters:

Volume weight, kg / m- ^ 88.0

Rigidity when compressed by? 0%,

kp / cm ² 0.146

Rigidity when compressed by 40%,

kp / cm ² 0,

Elasticity ^. , 46

2 0 9 8 10/1566

Example 10.

Dimensions
One prepares an XJHßiassitiiSR with the help of the laboratory guide described in Example 3 according to the following recipe (in parts by weight) Polyether triol on the basis of pro

pylene oxide (molecular weight 3000) 100

Mixture of 2,4- and 2,6-Toiylenendiisozyanate at a weight ratio of isomers of 80:20 44

1,2-dimorpholinoethane x 0.1

divalent tin octoate 0.2

water soluble surfactant

Silicone DC-I90 from Dow Corning 1.0

Water 3.3

The preparation of the * Χ «1» ^ ί3ΐ2βϊι as well as the production of the foam in the mold was carried out as described in Example 3. Foaming took 105 seconds.

Ifcen received a high quality elastic foam polyurethane with the following physical-mechanical parameters:

Volume weight, kg / mr 35 »4

ο
Tensile strength, kg / cm 1.5

relative

gsxs elongation, % 205

Residual deformation

(72 hours, 20 ⁰ G, compression by 50%),% 3.1

Elasticity, % 1ö

20981 0/1 566

Example 11.

Dimensions

Prepare an organization with the help of the example 3 laboratory stirrer according to the following recipe (in parts by weight): Polyester, obtained from glycerine, adipic and sebacic acid (content of

Hydroxyl groups 14.7%) 100

Reaction product of the mmmmmzgm excess of 2,4-toiylenediisocyanate with diethylene glycol (content of isocyanate groups 30.0%) .. 180

1,2-dimorpholinoethane 2.0

non-ionic, water-soluble surface active substance, reaction product of ethylene oxide with the p- (tert-butyl) -phenol a molar ratio of the reagents of

10: 1 1.0

Water 3.0

First, it was placed in the stirrer's metal beaker Polyester, surfactant and a pre-prepared aqueous solution of 1,2-dimorpholinoethane. The contents of the beaker are stirred for 1 minute, after which the reaction product of the excess of 2,4-torylene diisocyanate with diethylene glycol was added.

The mentioned reaction product of 2,4-ToIylenendiisozyanats with diethylene glycol is obtained beforehand as follows.

209810/1566

To 156 weight st rush 2,4-Tofylendiisozyanat are to gradually 24 parts by weight Diätliylenglykol at a temperature of 80 ⁰ G under intensive stirring. The obtained product, which contains 30.0% isocyanate groups, was cooled to room temperature.

The one after being introduced into the cup of the leader of all

Dimensions

Components obtained ^ 6SpJ © Sf? 5 @ fi were during 40 minutes stirred further and then poured into a cardboard form (box), where it foams and hardens with formation comes from foam. The foam formation lasted 240 seconds

en
the. Ran received a high quality rigid foam polyethane

with the following physical-mechanical parameters:

Volume weight, kg / mr 55 »0

Compressive Strength, kp / cm ² 4.5

Heating temperature, ⁰ C ........ ··. ··· 112 Thermal conductivity, kcal / m · St »degrees .......... 0.03

Example 12.

Dimensions
One prepares a XBBqpBBüxHM. with the help of a laboratory stirrer operating at 1400 rpm

the following recipe (in parts by weight): Polyester obtained from adipic acid, diethylene glycol and trimethylol propane (Molecular weight 2000, content of hydroxyl groups 1.82%) 100

Mixture of 2,4- and 2,6-tolylenediisocyanates with a weight ratio of the isomers 65:35 43.2

209810/1 566

1,2-dimorpholinoethane 2.0

water-soluble silicon organisclier more surface-active Fabric silicone L-532 der

Union Garbide 1.0

Water 3 »5

First, polyester was placed in the metal beaker of the stirrer. Then silicone L-532 and a previously prepared aqueous solution of 1,2-dimorpholinoethane to. The beaker contents became during 30 seconds

u stirred. A mixture of tolylene diisocyanates was then added added, stirred the composition for 10 seconds and poured it into a cardboard mold (box). In that form it came

Compound for foaming and hardening of the 3 <fkxKposdsdxbott with formation

of foam. Foaming took 105 seconds.

Lan received an elastic foam polyurethane with the following physical-mechanical characteristics:

Volume weight, kg / m- * 34.1

ρ
Tensile strength, kp / cm 1.4

relative

Elongation, % 174.0

Residual deformation

(72 hours, 20 ⁰ C, to

press together by 50%), % . 9.3

Elasticity, % 26.0.

209810/1566

Claims (6)

PATENT CLAIMS: Process for the production of foam polyurethane material by reacting diisocyanates or their mixtures with the polyisocyanates, polyethers or polyesters and water in the presence of a tertiary amine as a catalyst, characterized in that the tertiary Amine is 1,2-dimorpholinoethane "™ OHp GHp" - GHp O N- CHpGHp - N O CHp - GHp CHp - CHp in an amount of 0.05-2 parts by weight per 100 parts by weight of polyether or polyester. 2. The method according to claim 1, characterized in that that a mixture is used as diisocyanates of 2,4- and 2,6 -Tolylenendiisozyanaten used. 3 · The method according to claim 1 and 2, characterized in that the process in the presence of surface-active water-soluble non-ionic substances leads. 4. The method according to claim 3, characterized in that that as a surface-active substance 209810/1 566 Fe reaction products of the alkylene oxides with alkyl phenols used, 5 · Method according to claim. 31 thereby g e - know that surface-active substances like fe organic silicon compounds, silicones used 6. The method according to claims 1-5 »characterized in that the process is carried out in the presence of organic tin compounds of the general formula (HCOO) ₂ Sn or (EOOO) ₂ SnR ₂ I where R is an aliphatic radical · 7 · Method according to claims 1-6, characterized calibrated that the process is carried out in the presence of halogenated hydrocarbons 209810/1566