FR2634213A1 - POLYOL COMPONENT AND POLYOL COMPOSITION FOR THE PRODUCTION OF PLASTIC FOAMS OF POLYISOCYANURATE AND POLYURETHANE - Google Patents

Abstract

The present invention relates to obtaining a polyol component and to compositions based on this component for the manufacture of polyisocyanurate and polyurethane plastic foams. The aim of the invention is to produce such foams exhibiting reduced fragility, high heat resistance and reduced combustibility. This object is achieved using a polyol component characterized in that it is composed of an interaction product of urethane and / or isocyanurate plastic foam waste with trialkylolamine in the presence of a mixture of C2 to C4 diol and aliphatic triols, having a mass ratio of 0.5 to 1: 1: 1 to 1.45, a temperature of 190 to 250 degree (s) C, and having an index of hydroxyl from 650 to 780 mg of KOH / g, and a viscosity of 20 to 25 Pa.s. These foams are mainly used as soundproofing, heat-insulating and cryogenic insulation in mechanical engineering and in building.

Description

POLYOL COMPONENT AND COMPOSITION BASED ON

  POLYOL FOR THE PRODUCTION OF PLASTIC FOAMS OF

POLYISOCYANURATE AND POLYURETHANE

  The present invention relates to obtaining porous polymer materials and more specifically polyol components (polyalcoholic) and compositions at their base for the production of plastic foams polyicyanurate and polyurethane. These foams are used as sound-proofing coatings, heat-insulating and cryogenic insulation coatings in mechanical engineering, the construction of control and measuring equipment, and in the building industry. At present, polyol components are known from polyurethane foam scrap and used in the compositions in conjunction with the main polyol components. Same

  time we solve the problem of using the sub-

  products and expanding the assortment of polyol components used, while simultaneously reducing the costs for the production of polyurethane and polyisocyanurate foams. The use of polyisocyanurate foam waste for this purpose is unknown, particularly as a result of the high thermal resistance of the isocyanurate groups. As a result

  subject the specified waste to combustion.

  Most polyurethane foam waste treatment processes for obtaining polyol components are based on the destruction of the material up to the initial monomers and on the chemical exchange reactions of the polyurethane foams with the glycols or amines. or ethers in organic solvents and in the presence of catalysts. The destruction product is a liquid containing the polyols or diamines that are used, either after further purification, or directly as additional polyols to the compositions during preparation

polyurethane foams.

  A process described in Japanese Patent Application No. 5699244 according to which polyurethane foam waste is placed in the form of crumbs in a medium containing the glycols and in the presence of tall oil compounds as catalysts, the destruction of the foams is carried out. polyurethane at a temperature of 120 to 200 C. The mixture is distilled to obtain a polyol having a hydroxyl number of 58 mg KOH / g. The polyol obtained for the preparation of the polyurethanes is used only in combination with the others

polyol components.

  Catalytic hydrolysis of polyurethane foam waste (US Pat. No. 4,317,939) is also known with isolation of a pure polyol, the process comprising the following steps: dissolution of the foams indicated at a temperature of 185 ° C. to 200 ° C. saturated alcohols with bp = 225 to 280 ° C (C2 to C4) under an inert atmosphere; - addition of water and catalysts; hydrolysis of foams to amines and alcohols under the inert atmosphere at a temperature of 175

at 220 C;

  - vacuum purification at the temperature of

  230 C of the obtained polyol component.

  Said polyol whose heat resistance does not exceed 150 ° C. is used as an additive (10% by weight) in the composition for the preparation of polyurethane foams. This process requires for its

  realization a complicated technical material.

  A polyol-containing liquid component is known that is used in the production of rigid polyurethane foams, constituting a product for treating crumbs of rigid polyurethane foam, at a temperature of 150 to 200 ° C., in the presence of aliphatic diol C4 to 7, Eb = 160 ° C and of C2 to C8 monoalkylamine, in a proportion of 1 to 20% of the total mass (US: A, 4014809). Said liquid component constituting products of destruction of polyurethane foams, is characterized by the OH number of 605 mg KOH / g and the viscosity of 420 Pa. s. The indicated polyol is used in the composition for the production of polyurethane foams in combination with the other polyol components, and also contains the polyisocyanate, a catalyst for the formation of urethanes, a foaming agent, a

  Organosilicone foam regulator, a flame retardant.

  The polyurethane foam obtained has a density of

  28 kg / m3 and a compressive strength of 0.09 MPa.

  It has been proposed to create a polyol component and a composition based on it by an appropriate qualitative and quantitative selection of the compounds which would ensure the production of polyisocyanurate and polyurethane plastic foams having an imposed structure, a reduced fragility as well as a high

  resistance to heat and reduced combustibility.

  The solution consists in providing a polyol component which is an interaction product of urethane plastic foam waste and / or isocyanurate plastic foam with trialkylolamine, in the presence of a mixture of triol and C2 to C4 aliphatic diol having a mass ratio of 0.5 to 1: 1: 1 to 1.45 at a temperature of 190 to 250 C, the component having a hydroxyl number of 650 to 780 mg of KOH / g

and a viscosity of 20 to 25 Pa.s.

  The proposed polyol component contains cyclic moieties of chemical structures of the polyurethane and polyisocyanurate foams to be processed and has a high value of the OH number. This allows it to be used in the compositions for obtaining heat resistant polyurethane foams and polyisocyanurate foams having reduced brittleness and low combustibility as an independent polyol component. The said polyol component is easy to obtain and does not require complicated organic synthesis for its reproduction. The use of the polyol component and compositions based thereon solves the problem of using by-products, particularly

polyisocyanurate foams.

  The solution also comprises a composition for the preparation of the polyurethane plastic foam containing the polyol component, the polyisocyanate, a catalyst for the formation of urethane, a foaming agent, a foam regulator organosilicic agent, a flame-retarding agent, which composition according to the invention contains as polyol component an interaction product of plastic foam waste of urethane and / or isocyanurate with trialkylolamine, in the presence of a mixture of aliphatic C2 to C4 triol and diol having a mass ratio of 0.5 to 1: 1: 1 to 1.45 at a temperature of 190 to 250 C, which is characterized by a hydroxyl number of from 650 to 780 mg of KOH / g and a viscosity of 20 to 25 Pa.s, the ratio of the components being the following,% by weight: polyol component mentioned in polyisocyanate 50 to 60 catalyst for the formation of urethane 1, 1 to 2,2 foaming agent 6 to 9

organic foam regulator

  silicic acid 0.6 to 0.8 flame retardant 10 to 18 The polyol component is well compatible with all components of the composition, it does not require a complicated catalyst system for the formation of urethane and ensures polyurethane foam having a high heat resistance (up to 225C), low combustibility, while

  retaining its mechanical strength properties.

  Also, is proposed a composition for the production of polyisocyanurate plastic foam containing the polyol component, polyisocyanurate, a foaming agent, a flame retardant, and which according to the invention comprises as a polyol component a mixture of products. interaction of plastic urethane and / or isocyanurate foam waste with trialkylolamine in the presence of a mixture of triol and C2 to C4 diol having a ratio of 0.5 to 1: 1: 1 to 1.45 at a temperature of 190 to 250 ° C, having a hydroxyl number of 650 to 780 mg KOH / g and a viscosity of 25 Pa.s (component I) and an oil interaction product of tall oil, trioxyalkylolamine and potassium hydroxide having a hydroxyl number of 300 to 950 mg KOH / g and a bound potassium content of 0.5 to 5.2% by weight (component II), the report of

  components being the following (% by mass): -

  mixture of polyol components I and II 5 to 35.7 polyisocyanate 39.4 to 81, 7 foaming agent 0.7 to 17 flame retardant 1 to 15 The proposed mixture of polyol I and polyol II is well compatible with the others components of the composition, the polyol II then shows the synergistic effect vis-à-vis the polyol I during the cyclotrimerization reaction of N-CO groups. The introduction of said mixture of polyols into the composition does not require a complicated catalytic system, which makes it possible to reduce the costs for the preparation of polyisocyanurate plastic foams and to simplify

  considerably the technological process.

  By varying the ratios of the polyols I and II in the composition I, polyisocyanurate plastic foams are obtained with imposed structures with open or closed pores. In addition, the potassium salts of the tall oil acids in the plastic foam act as an intermolecular plasticizer, which substantially reduces the brittleness of the polyisocyanurate plastic foam. It is rational to obtain the polyisocyanurate plastic foam having optimum physico-mechanical characteristics, to use the mixture of polyol components in a ratio of 0.05 to 0.5: 0.5 to 0.95. It is advantageous, in order to obtain the closed-pore polyisocyanurate plastic foam having the optimum physico-mechanical characteristics, that the composition furthermore contains an organosilicone foam regulator, the ratio of the components being the following, in mass; mixture of polyols I and II 5 to 27.7 polyisocyanate 51.4 to 81.7 foaming agent 10 to 17 regulator of organosilicone foam 0.5 to 0.7 flame retardant 1 to 15 For obtaining the polyol component I a different principle of waste utilization is realized based on the thermal dissociation of the urethane bond. It is known that at 280 to 300 ° C the disproportion of the urethane linkage between isocyanate and polyhydric alcohol occurs. However, at such high temperatures, the decomposition of the polyurethane foam also occurs not only with the formation of a primary amine, an unsaturated olefin and carbon dioxide, but also with the formation of a secondary amine and of carbon dioxide. The presence of these products in the polyol used to obtain the polyurethane foam is undesirable since this results in the alteration of the physicochemical characteristics of the polyurethane foam to be prepared. The dissociation temperature of the urethane bond decreases to 195 to 200 ° C in the case where decomposition is carried out in chemical reagents containing the trisubstituted nitrogen atom. Trialkylolamines (TAA) are such compounds, in particular non-volatile trialkylolamine having a high heat resistance, whose molecule contains three hydroxyl groups, which is important when the target product obtained in the synthesis is used.

  secondary polyurethane foam.

  As our studies demonstrate, dissociation of the urethane bond occurs at a temperature of

at 258 C.

  The process proceeds according to the following scheme: 1) following the interaction of trialkylolamine and polyurethane foam waste and the trisubstituted nitrogen atom at the indicated temperature occurs dissociation of the urethane bond with formation of compounds containing the isocyanate group and compounds containing the hydroxyl group: 2) the isocyanate formed reacts with the hydroxyl groups of trialkylolamine which are more active than the hydroxyl groups of the compound obtained as a result of the dissociation of

urethane bond.

  It follows that in addition to its function as a catalyst for disproportionation of the urethane bond, trialkylolamine can react with the formed macromolecular isocyanate and thereby displace the equilibrating dissociation reaction of the urethane bond in the sense of formation of

isocyanate and alcohol.

  During the processing of polyurethane and polyisocyanurate foams containing the urethane and isocyanurate groups, only the 5 urethane groups undergo dissociation, the isocyanurate groups remain in the final product, which results in a increased resistance to

  heat foamed materials obtained from them.

  This notably ensures the possibility of converting polyisocyanurate foams before

not transformable.

  The process for obtaining the polyol component

(I) is realized as follows.

  In a reactor equipped with a mechanical stirrer is placed trialcoylolamine brought to 190 to 250 C and stirring is introduced in portions the crushed waste (particle size 0.4 to 1.0 mm) of polyurethane foam and / or polyisocyanurate. The total mass ratio of trialkylolamine and waste

  treat should be 1: 0.5 to 1 respectively.

  2 A new portion is introduced only after a total homogenization of the previous portion. he

  then the foaming of the reaction mass occurs.

  This means that an insignificant portion of urethane bonds undergo decarboxylation at this temperature. The carbon dioxide released gives rise to the reaction mass. Excessive foaming is

prevented by intensive brewing.

  After the evacuation of 60% by weight of waste there is a significant increase in the viscosity of the reaction mass (of the order of 30 to 40 Pa.s at C). This indicates that as a result of the reaction

  form macromolecular compounds.

  For subsequent introduction of the waste, the viscosity of the reaction mass is reduced by adding a mixture of triol and aliphatic C2 to C4 diol having a mass ratio with trialkylolamine of 1 to 1.45: 1 respectively, then the mass is allowed. remaining waste indicated. It is desirable to use the diols at a boiling temperature corresponding to the temperature of the reaction between the trialkylolamine and the dissociation products of the

urethane bond.

  The final target product consists of a dark opaque homogeneous viscous liquid without suspended particles, having a viscosity of 20 to 25 Pa.s, and characterized by a hydroxyl number of 650 to 780 mg KOH / g. The value of the viscosity of the polyol component is chosen starting from the technological parameters when it is introduced into the composition. The limit values of the hydroxyl number are determined by the possibility of its independent use, without using the other components in the preparation of polyurethane foams having high heat resistance and low combustibility while retaining its

high mechanical strength.

  The composition proposed for preparing the polyol-based polyurethane foam is obtained as follows. In a container is placed the polyol component (I) in a proportion of 20 to 30% by weight, 10 to 18% by weight of flame retardant, for example trialkylphosphate, and 0.6 to 0.8% by weight of organosilicone foam regulator, for which silicone copolymers and ethylene and propylene oxides can be used. The choice of the quantitative limits of the flame retardant and the foam regulator is imposed by the requirements which the polyurethane foam must meet, that is to say its low combustibility as well as its closed porous structure. subsequently,

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  1,1 to 1,2% by weight of catalyst of the urethane formation is added to the mixture, which makes it possible to regulate, in the optimum regime, the parameters of the foaming, and 6 to 9% by weight of foaming agent. low-boiling halogenated hydrocarbons whose quantitative limits determine the density of the

polyurethane foam to get.

  The quantitative limits of the polyol component (I) are determined by the hydroxyl number, taking into account obtaining low heat-resistant, heat-resistant polyurethane foams with good mechanical strength. The polyisocyanate content is determined by an isocyanate index

equal to 100 to 145.

  The mixture is stirred and 50 to 60% by weight of polyisocyanate is added. The reaction mixture is intensively stirred, then poured into a cardboard box in which it is foamed and solidified at room temperature. The polyurethane obtained at a density of 36 to 45 kg / m.sup.3, a compressive strength of 0.124 to 0.14 MPa, a heat resistance of 203 to 225 mC, a closed cell content of 96 to 98%, an index of of combustibility according to the ceramic tube (TC) method of 1.5 to 2.0. All characteristics are determined by known methods except the index

TC.

  The TC method consists of determining the maximum ratio of the test surface below the curve obtained as a result of measuring the temperature of the gases released from the test material, in different periods of time, at the surface. calibrated below the curve of the temperature of the gases released during the performance of the test-calibrated on the plate

  of fiber cement, in the same amount of time.

  ill Sd, test K = calibrated (The method is described in the compendium of scientific works "Issledovanie i razrabotka ograzhdajuschikh konstruktsy s napylennym penoplastom i technologia ikh izgotovlenia", Tsniiproektstalkonstruktsia

im. Melnikova, Moscow, 1985).

  Although polyol I can be used in the compositions as such, it requires the presence of even simple catalyst systems and organosilicon foam regulators. In addition it has a sufficient viscosity which can cause known difficulties during the preparation of the composition. It can therefore be used in the mixture with a catalytic polyol II constituting an interaction product of tall oil with trioxyalkylolamine and potassium hydroxide having a hydroxyl number of 300 to 950 mg. of

  KOH / g, a bound potassium content of 0.5 to 5.2% by weight.

  It is proposed to use this mixture of polyol components 1, II in the compositions to prepare polyisocyanurate foams. The advantage of their common use

consists of the following.

  Polyol II has catalytic activity in urethane formation reactions because it contains the tertiary nitrogen atom which is a catalyst for the urethane formation reaction. As a result, the use of the polyol mixture I and II makes the introduction of the urethane formation catalyst superfluous. Polyol II also has a catalytic activity in the NCO cyclotrimerization reactions due to the presence therein of the potassium salts of tall oil acids. If the mixture of polyols I and II is used, it is not necessary to

  need to introduce the cyclotrimerization catalyst.

  The potassium salts give the polyol II the properties of a surfactant and therefore its use in the mixture with the polyol I excludes the use of surfactant. The composition proposed for preparing polyisocyanurate foams based on a mixture of polyols

I and II are as follows.

  The polyol I and the polyol II are placed in a container, preferably in a mass ratio of 0.05 to 0.5: 0.5 to 0.95 respectively, and then 1.0 to 15% by mass are added. flame retardant, 0.7 to 17% by weight of foaming agent. The mixture of polyols I and II constitutes 5.0 to 35.7% of the total mass of the composition. As a foaming agent, a halogenated hydrocarbon or water may be used without altering the characteristics

  polyiso-cyanurate foams. We mix the mixture.

  until homogenization with an admission

  additional 39.4 to 81.7% by weight of polyisocyanate.

  The reaction mass is poured into a cardboard box where foaming and solidification take place. The time of loss of the adhesiveness of the polyisocyanurate foam is 6 to 70 s, which indicates a catalytic activity

high of the composition.

  The quantitative limits of the flame retardant and the foaming agent are chosen as described above. The polyisocyanurate is used in an amount determined by the amount of isocyanurate groups in the finished plastic foam, this controlling its combustibility index. The limiting quantitative values of the polyol mixture content I and II of the composition, as well as their ratio, depend on the required structure of the plastic foams, that is to say of a porous structure that is open or closed, technological parameters of foaming and physico-mechanical properties of the polyisocyanurate foam to obtain, that is to say the reduction of brittleness while maintaining the combustibility and heat resistance indices. The polyisocyanurate foam obtained at a bulk density of 32 to 59 kg / m3, a closed cell volume content of 5 to 93%, a conventional brittleness of 2 to 31%, a specific porosity of 2.1 to 5.2, a combustibility index according to the TC method of 0.73 to 2.10. In the case where it is desired to obtain the closed-pore plastic foam with ratios between the indicated polyols I and II, the organosilicon foam regulator is introduced into the composition at a rate of 0.5 to

0.7% by weight.

  We give below the examples of realization

concrete of the proposed invention.

Example 1

  In order to prepare the polyol I, 1 g of triethanolamine is placed in a reactor and heated to 190 ° C. and the polyurethane foam waste is introduced in portions. After the homogenization of 60% by weight of waste, 1 kg of a mixture of glycerine and of ethylene glycol (0.4: 0.6) are added and the admission of waste is continued. The total quantity of waste to be homogenized is equal to 1 kg. Polyol I has a hydroxyl number of 750 mg KOH / g and a viscosity at 25C of

21 Pa.s.

Example 2

  To prepare the polyol I is placed in a reactor 1 kg of tripropanolamine, is heated to 200 C and stirring is introduced in portions a mixture of waste polyurethane foams and polyisocyanurate. Their mass ratio is 1: 1. After the homogenization of 60% by weight of waste, 1.45 kg of a mixture of glycerol and ethylene glycol (0.4: 0.6) are added and the admission of waste is continued. The total quantity of waste to be homogenized is equal to

14 2634213

  1 kg. The prepared polyol has a hydroxyl number

  780 mg KOH / g and a viscosity at 25 ° C. of 20 Pa.s.

Example 3

  In order to obtain the polyol I, 1 kg of triethanolamine is placed in a reactor, the mixture is heated to 220 ° C. and the polyurethane and polyisocyanurate foams are allowed in portions. Their mass ratio is 0.3: 0.7. After the homogenization of 60% by weight of waste, 1.25 kg of a mixture of glycerin and butanediol -1.4 (0.4: 0.6) and the admission of the waste is continued. The total mass of waste is equal to 0.7 kg. The polyol component I is obtained with a hydroxyl number of 680 mg KOH / g

  and a viscosity at 25 ° C. of 23 Pa.s.

Example 4

  To prepare the polyol 1 kg of triethanolamine is charged in a reactor, the mixture is heated to 250 ° C. and the polyisocyanurate waste is allowed in portions. After the homogenization of 60% by mass of waste is added 1.35 kg of mixture of glycerol and butanediol 1,4 (0.4: 0.6). The total quantity 2G of waste to be homogenized is 0.5 kg. The polyol component I is obtained with a hydroxyl number of 650 mg KOH / g and a viscosity at 25 ° C.

Not.

Example 5

  To prepare the polyurethane foam is poured into a container for foaming polyol component I, is added trichloroalkyl phosphate, dialkylethanolamine, diethyledicaprilate tin or tributyltin acetate, the block copolymer oxyalkyldimethylhydroxysiloxane and fluorotrichloromethane, one brews and a suitable amount of polyisocyanate is added. Intensive stirring is carried out by means of a mechanical stirrer. The composition is poured into a carton where foaming and solidification takes place at room temperature. Below we give the components of the proposed composition (% by mass), the technological parameters of the foaming and the characteristics

  D $ * physico-mechanical polyurethane foam obtained.

Table.1

  m Denomination of Composition Naming, Parameter of Foaming and NN Components Properties of Polyurethane Foam

1 2 3 4 5

  cm 1 - 2 3 4 5 6 7 1 Polyol component I

according to the examples: 1 - 25,78 - -

2 20,00 -.

3 3 - _ _ 22.7 -

4 4 - 30.0 - 27.8

  Trichlorethyl-phosphate 18 - 11,33 15 10 6 Trichloroprolyl

phosphate - 10 - - -

  Dimethylethanolamine 2 1.0 1.75 - 1.35

8 Diethylethanolamine - 1,5-

  9 Dithyldicaprilate of tin 0.1 0.2 0.17 - 0.16

Tributary acetate

tyltin - _ _ 0,15 -

11 Block Copolymer

oxyalcoylènediméthyl-

  hydroxysiloxane 0.8 0.6 0.75 0.65 0.69 12 Fluorotrichloromethane 9 6 6 9 6 13 Polyisocyanate 50 1 56.42 50 51 60

Technological parameter

  foaming temperature: 14 Time to start foaming (s) 10 18 16 14 12

Time of gelation

  time (s) 28 35 33 34 32 16 Time of loss of adhesion (s) 35 40 48 52 55 17 Density, kg / m% 37 44 45 36 43 18 Compressive strength, MPa 0.124 0.194 0.185 0.132 0.187 19 Heat resistance, C 215 207 203 207 225 Denomination of composition, foaming parameter and NN Components properties of polyurethane foam i1 2 3 4 5

1 2 3 4 5 6 7

  cm. Volume concentration in closed cells,% 97 98 96 97 98

21 Combustibility index

according to the method

TC 1.98 2.00 1.62 1.58 1.50

Example 6

  To obtain the polyol II in a 1000 ml round-bottomed flask equipped with an inert gas inlet capillary, a water vapor evacuation system, a refrigerant and a 300 g of tall oil, 424 g of triethanolamine oxyethylated to the degree of oxyethylation of 3 and 5.25 g of potassium hydroxide are introduced into a receiving flask. The reaction mixture is evacuated at a temperature of 170 ° C. and at a residual pressure of 0.3 atm until a total distillation of the water. The polyol obtained consists of a dark brown viscous liquid (2.2 Pa.s), and has a hydroxyl number of 300 mg KOH / g and a

bound potassium of 0.5% by mass.

Example 7

  To prepare the polyol II in the flask described above is placed 300 g of tall oil, 342 g of triethanolamine and 51.3 g of potassium hydroxide. The reaction mixture is evacuated to the temperature of C and a residual pressure of 0.4 atm until a total evacuation of the water. The polyol obtained consists of a viscous liquid (10.2 Pa.s) and has a hydroxyl number of 560 mg KOH / g and a potassium content

linked by 5.2% by mass.

Example 8

  To obtain the polyol II in the flask described above, 100 g of tall oil, 630 g of triethanolamine and 16.4 g of potassium hydroxide are placed. The process is carried out as in Example 6. The catalytically active polyol is characterized by a viscosity of 5.4 Pa.s, a hydroxyl number of 950 mg of

  KOH / g, and a bound potassium content of 1.53% by weight.

Example 9.

  In order to prepare the polyisocyanurate foam, a mixture of components of polyols I and II is poured into a foaming vessel, the flame retardant is added,

1 26 34 2634213.

  the foaming agent and a suitable amount of polyisocyanate. The reaction mixture is stirred vigorously with a mechanical stirrer and poured into a cardboard box in which the foaming takes place.

  and solidification at room temperature.

  Below is given the components of the compositions proposed (% by weight), the technological parameters of their foaming and the physico-mechanical properties of the polyisocyanurate foam obtained.

TA IL1AU 2

  How to: ComipositioL.Lun, deo. all properties and properties NN Components of polyisocyanurate foam 2 3 46 1 2 | i 15 6 7 1 Polyol I according to

examples 1 0.4 - - - 8.8 -

2 2 - 6.0 - - -

3 3 - - 6.0 - -

4 4 __ _ - 0.4 - - - 0.6

Polyol II1 seluoni

Examples 6 - 35.7. -

6 7 - - 5.3 13.1 8.8 -

7 B __ 4.6 _-i.4 _ 11.3

Aqent'igjnifu%! E: t ri.-

  B Aq'Jent'fhfUqC Wtrie - 7.9 1, 14.0 10.4 10.4 ch] orthv] .e.'ho

9 Tr c or pr py -.-

phosphate 15.0 _ - - - -

  Foaming agent: R-IIx 11.9 - 6.0 - - 11.0

11 R-113x "- 17.0 - - 16.5 -

12 water - - 0,7 - -

  13 Polyisocyanate G68,1 3,4 81,7 66,2 55,5 66,7 14 Isocyanate index 600 1,0o 450 180 200 250

Parameters of foam

  wise: Time to start foaming (s) 20 10 10 9 16 14

16 Time to complete

  time (s) 55 28 25 17 42 29 17 Time to lose adhesiveness 70 35 50 40 58 42

Property Index

  density: 18 Density, kg / lu 34 32 44 32 36 38 19 Closed cell content,% by volume 91 88 5 84 5 90 Composition designation, foaming parameters and properties NN Components of polyisocyanurate foam r1 2 3 4 5 6

4 1 2 3 4 5 6 7 8

  Specific porosity, number of pores / mm 3,4 2,8 3,6 2,4 2,1 2,5

21 Fragility convention-

,% 2 22 31 16 5 9

22 Fire resistance, in-

  TC value 1.93 0.88 0.88 1.2 1.56 1.68 x - trichlorofluoromethane xx trichlorotrifluoromethane

22 2634213

Example 10

  The polyisocyanurate foam was prepared as described in Example 9, except that the weight ratio of the polyol components I and II was selected between 0.06-0.28 and 0.7. -0.96 respectively. Table 3 gives the components of the compositions proposed (% by weight), their technological parameters for foaming and the physico-mechanical properties of the polyisocyanurate foam.

to prepare.

TAIBLEAU 3

  wm Denomination of CoImposiLioni, Foaming Materials and Properties - NN components of the polyisocyanurate foam obtained

-.1 2 3 4

  % 0o 1 2 3 4 I Polyol component according to the examples:

I-I 0.3 7.7 0.3 0.3

2 II-7 6.3 20.0 4.7 -

3 11-6 - - - 7.0

  4 Flame retardant: trichloro-10.4 thylphosphate 1.0 10, 15.0 10.4 Foaming agent: trichlorotrifluoroethane 10.0 10.0 17.0 16.5 6 Foam regulator

organosilicon: copro-

oxyal-block sequenced

coylènediméthylhydroxy-

  Siloxane 0.7 0.5 0.6 0.7 Cj 7 Polyisocyanate 81.7 51.4 62.4 64.4 8 Isocyanate Index 900 130 900 370 9 Foaming Parameters

Start time of the foam

  sage (s) 7 3 8 11 Gelation time (s) 155 19 25 11 Adhesiveness loss time .. (s) 17 6 25 35 12 Property indices: Closed cell volunic tencur,% 93 91 85 90 13 Density, kg / m 3 59 52 33 30 14 Specific porosity, number of pores / mm 5.2 4.8 3.6 4.7 Fragility,% 16 2 21 17 16 Fire resistance according to the TC 0 method, 73 2.10 0.81 0, 96

Claims (5)

  A polyol component characterized in that it is composed of an interaction product of urethane and / or isocyanurate plastic foam waste with trialkylolamine in the presence of a mixture of C2 to C4 diol and of aliphatic triol, having a mass ratio of 0.5 to 1: 1: 1 to 1.45 at a temperature of 190 to 250C, and having a hydroxyl number of 650 to 780 mg KOH / g, and a viscosity of 20 to 25 Pa.s.   2. Composition for obtaining the polyurethane plastic foam comprising a polyol component, a polyisocyanate, a urethane forming catalyst, an organo-silicone foam regulator, a foaming agent, a flame retardant, characterized in that it contains as the polyol component an interaction product of plastic urethane and / or isocyanurate foam waste with trialkylolamine in the presence of a mixture of aliphatic C2 to C4 triol and diol having a weight ratio from 0.5 to 1: 1: 1 to 1.45 at a temperature of 190 to 250 C, and having a hydroxyl number of 650 to 780 mg KOH / g, and a viscosity of 25 Pa.s, the ratio of the components being as follows (% by weight): Polyol component indicated to polyisocyanate 50 to 60 Urethane formation catalyst 1.1 to 2.2 foaming agent 6 to 9 organic foam regulator   silicic 0.6 to 0.8 flame retardant 10 to 18 3. Composition for obtaining the polyisocyanurate plastic foam comprising a polyol component, a polyisocyanurate comprising a polyol component, a polyisocyanate, a foaming agent, a flame retardant, characterized in that it contains as a polyol component an interaction product mixture of polyurethane and / or polyisocyanurate plastic foam waste with trialkylolamine in the presence of aliphatic triol and aliphatic C2 to C4 diol having a mass ratio of 0.5 to 1: 1: 1 to 1.45, a temperature of 190 to 250 ° C, having a hydroxyl number of 650 to 780 mg of -KOH / g and a viscosity of 25 Pa.s (component I), and a product of interaction of tall oil with trialkylolamine and potassium hydroxide having a hydroxyl value of 300 to 950 mg KOH / g and a bound potassium content of 0.5 to 5.2% by weight (component II) , the ratio of the components being the following,% by mass: mixture of components of polyol I and II 5.0 to 35.7 polyisocyanate 39.4 to 81.7 foaming agent 0.7 to 17 flame retardant 1.0 to 15 4. Composition according to claim 3, characterized in that it contains a mixture of polyol components I to II having a mass ratio of 0.05 to 0.5: 0.5 to 0.95.   5. Composition according to claim 3 or 4, characterized in that it further contains an organosilicone foam regulator, the ratio of the components being as follows,% by weight: mixture of polyol-I and II 5.0 to 27, 7 polyisocyanate 51.4 to 81.7 foaming agent 10 to 17 organic foam regulator   silicic acid 0.5 to 0.7 flame retardant 1.0 to 15.0