Method of production of rigid polyurethane foams with low thermal conductivity and rigid polyurethane foams obtained by this method

 

Describes a method for rigid polyurethane foams, in which rigid polyurethane foams obtained using (A) polycomponent containing 1) at least one complex polyetherpolyols with a molecular mass of from 100 to 30,000 g/mol with at least two hydrogen atoms reactive toward isocyanates, (2) aminopolyamide with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive towards isocyanate and at least one tertiary nitrogen atom, 3) polyethers with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive towards isocyanates, and pore-forming - alkane or mixture of alkanes, (B) organic and/or modified organic polyisocyanate with a content of NCO-groups from 20 to 48 wt.%. Described rigid foams characterized by low thermal conductivity and is suitable for use as a layer constituent elements and material for filling cavities. 2 S. and 11 C.p. f-crystals, 3 tables.

The invention relates to a new method of production of rigid polyurethane foam with a predominantly closed cell rigid polyurethane foam, recip is tough polyurethane foams are used due to their low thermal conductivity in isolation cooling and freezing units, industrial plants, large storage tanks and pipelines, in shipbuilding and in the construction industry. The review, covering the work on the production and use of rigid polyurethane foam, published Dr.Oertel, Kunstoff-Handbuch, volume 7 (polyurethanes), 2nd Edition, 1983 (published by Carl Hanser, Munich).

thermal conductivity of rigid polyurethane foam with a predominantly closed cells largely depends on the pore or a pore-forming gases, among which the most relevant were completely halogenated perchloromethane, in particular, Trichlorofluoromethane (R11), which has a particularly low thermal conductivity. These substances are chemically inert and non-toxic. However, fully halogenated hydrocarbons because of their high stability fall into the stratosphere, where they are due to their content of chlorine destroy the ozone (e.g., Molina, Rowland, Nature, 249 (1974) 810. First interim report of the investigation Commission of the Bundestag "Vorsorge zum Schutz der" from 02.11.1988, the Bundestag. Bonn).

To reduce the content of R11 in the rigid polyurethane foams offer formulations containing Kpovati as pore-forming partially fluorinated hydrocarbons (hydrofluroalkane), which have at least one uglevodorodno communication. Substances of this class of compounds do not contain chlorine atoms and therefore have zero CCT-index (potential ozone depletion), for comparison, R11 is CCT = 1. Typical representatives of this class of substances are, for example 1,1,1,4,4,4-hexaferrite (R356) or 1,1,1,3,3-pentafluoropropane (245 fa).

Further known to use as a pore-forming individually or in a mixture of such hydrocarbons (U.S. patent US-PS 5 391 317), as n - or ISO-pentane, 2,2-Dimethylbutane, cyclopentane or cyclohexane. In addition, it is known the use of pore-hydrocarbons in combination with water (European patent EP 0 421 269).

It is known further that the unsaturated hydrocarbons due to its chemical structure is very non-polar and therefore are easily mixed with the polyols used for the preparation of rigid foams. Complete mixing is an important condition of the conventional manufacturing technique, in which the polyol and isocyanatophenyl mechanically mixed. Polycomponent also contain simple or complex reactive polyester-polyols also the pore-forming and auxiliary substances, such obladaet most high ability to dissolve alkanes (international application WO 94/03515).

It is also known that rigid foams obtained using hydrocarbon pore have poorer conductivity than the foams obtained by R11 and R11 is restored pore, due to the higher thermal conductivity of the gas hydrocarbons. (thermal conductivity of gases at 20oC is for R11: 8 mW/MK; cyclopentane: 10 mW/MK; n-pentane: 13 mW/MK).

The objective of the invention is the development of rigid polyurethane foam, foamed hydrocarbons having a conductivity the same low level as the polyurethane foams obtained by using R11-recovered blowing agent.

It has been unexpectedly found that polycomposite on the basis of certain polylines give foams with the same low thermal conductivity, as in the case of R11-restored pore-forming, especially when the pore-forming substance use cyclopentane.

The object of the invention therefore is a method for the production of rigid polyurethane foams with low thermal conductivity from polyols and polyisocyanates, as well as pore-formers and optionally a blowing means, characterized in that the rigid polyurethane foam Pol weight of from 100 to 30,000 g/mol with at least two hydrogen atoms, reactive towards isocyanates, 2) compounds with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive towards isocyanate and at least one tertiary nitrogen atom, 3) compounds with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive towards isocyanates, 4) catalysts, 5) 0.5 to 7.0 wt. parts of water, counting to 100 wt. parts of a component And, 6) the pore-forming - alkanes or a mixture of alkanes and 7) optionally auxiliary substances and/or additives with B. organic and/or modified organic polyisocyanate with the content of the PSO-groups from 20 to 48 wt. %.

Was unexpected that the combination, according to this invention, a complex of polyether polyols with the specified aminopolyamide and another polyol in polycomponent yields obtained using hydrocarbon blowing agent foam with such a low thermal conductivity.

According to this invention polycomposite contain at least one complex polyetherpolyols with a molecular weight of from 100 to 30,000 g/mol, preferably from 150 to 10,000 g/mol, particularly preferably from 200 to 600 g/mol of the aromatic and/or ameres dicarboxylic acids are phthalic acid, fumaric acid, maleic acid, azelaic acid, glutaric acid, adipic acid, cork acid, terephthalic acid, isophthalic acid, decanedicarbonitrile acid, malonic acid, succinic acid, and such aliphatic acids as stearic, oleic, ricinoleic. Can be used mono-, di - or tricarboxylic acid individually or in any mixtures thereof. Instead of free mono-, di - and tricarboxylic acids can also be derived mentioned mono-, di - and tricarboxylic acids, such as esters of mono-, di - and tricarboxylic acids and alcohols with 1-4 carbon atoms or the anhydrides of mono-, di - and tricarboxylic acids or triglycerides. As alcohol components for the esterification are mainly used: ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, 1,2 - or 1,3-propandiol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,10-decandiol, glycerin, trimethylolpropane or mixtures thereof.

Polycomposite may also, according to this invention, contain easy-polyesters, such as, for example, obtained by the reaction of the anhydride of phthalic acid with diethylene glycol and then with ethylene oxide (the application for the European patent EP-A 0 250 Leroy weighing from 150 up to 12,500 g/mol, having at least two reactive towards isocyanates hydrogen atoms, and at least one tertiary nitrogen atom. They are polyprionidae oxides of alkylenes, such as ethylene oxide, propylene oxide, butilenica, dodecyloxy or styrene oxide, preferably ethylene oxides and propylene, to the connection initiator polyaddition. As such initiators use ammonia or compounds having at least one primary or secondary or tertiary amino groups, such as aliphatic amines (e.g. Ethylenediamine), oligomers of ethylene diamine (for example, Diethylenetriamine, triethylene-terratropin or Penta-etilenoksid), ethanolamine, diethanolamine, triethanolamine, N-methyl - or N-ethyl-diethanolamine, 1,3-Propylenediamine, 1,3 - or 1,4-butylenediamine, 1,2-, 1,3-, 1,4-, 1,5-, 1,6-hexamethylenediamine were, aromatic amines, as phenylenediamine, toluylenediamine (2,3-toluylenediamine, 3,4-toluylenediamine, 2,4-toluylenediamine or a mixture of these isomers), 2,2'-diaminodiphenylmethane, 2,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane or a mixture of these isomers.

According to this invention polycomposite contains further at least one of the compounds with a molecular weight of from 150 to 12500 g/mats hydrogen atoms. They are polyprionidae oxides of alkylenes, as, for example, ethylene oxide, propylene oxide, butilenica, dodecyloxy and styrene oxide, preferably ethylene oxides and propylene, to the connection initiator polyaddition. As such initiators are used preferably water and polyhydric alcohols, such as sucrose, sorbitol, pentaerythritol, trimethylolpropane, glycerin, propylene glycol, ethylene glycol, diethylene glycol, and mixtures of these initiators. Because of these shared polyols, according to this invention, best results are usually required in practice, the mechanical properties of rigid polyurethane foams.

According to this invention polycomposite contains the activator or activator mixture, which lead to the curing time of 20 to 50, preferably from 25 to 45, particularly preferably from 27 to 40, if the foaming is carried out in a high-pressure apparatus of NC 270 company Henneke at 20oC. the curing Time is from the moment of mixing to approximately the moment when introduced into the foam rod pulls the thread.

According to this invention can be used is usually applied chemistry poly is silumin, tetramethylaniline, 1-methyl-4-dimethylaminomethylphenol, triethylamine, tributylamine, dimethylbenzylamine, N, N',N"-Tris-(dimethylaminopropyl)-hexahydrotriazine, di-methylaminopropane, N, N, N',N'-tetramethylenebis, N,N,N',N'-tetramethylbutylamine, tetramethylhexadecane, pentamethyldiethylenetriamine, tetramethylethylenediamine ether, dimethylpiperazine, 1,2-dimethylimidazole, 1-Aza-bicyclo-(3,3,0)-octane, bis(dimethylaminopropyl)urea, bis-(dimethylaminopropyl)-ether, N-methylmorpholine, N-ethylmorpholine, N-cyclohexylaniline, 2,3-dimethyl-3,4,5,6-tetrahydropyrimidin, triethanolamine, diethanolamine, triisopropanolamine, N-methyldiethanolamine, N-ethyldiethanolamine, dimethylethanolamine, tin-(II)-acetate, tin-(II)-octates, tin-(II)-ethylhexoic, tin-(II)-laurate, dibutylaminoethanol, dibutyltindilaurate, dibutylamine, dioctylmaleate, Tris-(N,N-dimethylaminopropyl)-s-hexahydrotriazine, Tetramethylammonium-hydroxide, sodium acetate, potassium acetate, sodium hydroxide or mixtures of these or similar catalysts.

According to this invention polycomposite contains 0.5-7.0 wt. parts, preferably 1.0 to 3.0 wt. parts of water to 100 wt. parts polycomponent A.

According to this invention as pore-formers who as well as mixtures thereof.

As the isocyanate component is used, for example, aromatic polyisocyanates, like described by W. Siefken, Justus Liebigs Annalen der Chemie, 562, pages 75 to 136, for example, such a formula
Q(NCO)n,
where n=2-4, preferably 2, and Q denotes an aliphatic hydrocarbon radical with 2-18, preferably 6-10 C-atoms, a cycloaliphatic hydrocarbon radical with 4 to 15, preferably 5-10 C-atoms, an aromatic hydrocarbon radical with 8 to 15, preferably from 8 to 13 C-atoms. Such polyisocyanates are described, for example, in the patent application the Federal Republic of Germany DE-OS 28 32 253, pages 10-11.

Especially preferred are usually technically readily available polyisocyanates, for example 2,4 - and 2,6-toluylenediisocyanate, as well as arbitrary mixtures of these isomers (TDI), polyvinylpolypyrrolidone received by aniline-formaldehyde condensation and subsequent postironium (crude MDI) and MDI (modified polyisocyanates containing carbodiimide groups, urethane groups, alliantgroup, I-cyanurate, urea groups or biuret groups, particularly modified polyisocyanates which are derived from 2,4 - and 2,6-toluylenediisocyanate or 4,4'- and/or 2,4'-diphenylmethanediisocyanate.

Can also prima as, for example, polyol or ester components with a molecular mass of 60-1400 g/mol, having 1-4 hydroxyl groups.

Can be used together paraffins or fatty alcohols or dimethylpolysiloxane, as well as pigments or dyes, further stabilizers against aging and weathering, plasticizers, fungicidecalcium and bakteriostaticheski-active substances as well as fillers, such as barium sulphate, kieselguhr, carbon black or flotated chalk.

Further examples according to this invention, if necessary, shared surface-active additives and prestabilization, regulators cells, reaction inhibitors, stabilizers, fire retardants, dyes and fillers, as well as fungicidecalcium and bakteriostaticheski-active substances, as well as details about the usage and effect of these incremental funds described: 1) Vieweg,, Kunstoff-Hand-book, volume VII, publishing house Carl Hanser, Munich, 1966, e.g. on pages 121-205, and 2) the Publication 1983, published by G. Oertel (published by Carl Hanser, Munich).

Upon receipt of foam foaming, according to this invention, is carried out in closed form. When this reaction mixture is placed in the for example epoxy resin. In the form capable of foaming the reaction mixture foams and molded. When this foam-in form can be carried out so that the molded product has a surface with a porous structure. But it can occur and so that the molded product has a reinforced shell and a porous core. According to this invention in the first named case, this is because in the form contribute so much expanded onto the reaction mixture so that the resulting foam has filled in the form. The mode of action in the last mentioned case is that in the form contribute more expanded onto the reaction mixture than is necessary to fill the internal volume of the shaped foam. In the latter case, therefore, operate at sverhnaglost". Such a technique is known from U.S. patent US-PS 3 178 490 and 3 182 104.

The object of the invention are also obtained according to this invention a rigid foams, represents a layer of composite components and material to fill cavities, especially in electroheating installations.

According to this invention the method of the foam filling of the cavities is used mainly in refrigeration and freezer ustanova double transfer.

Obtained according to this invention a rigid foams are used, for example, in construction, as well as for pipe heating and containers.

The following examples should explain the invention without limiting, however, its volume.

In all examples, the rigid polyurethane foams produced in high-pressure apparatus NK 270 company Henneke at 20oC.

Time (a claim that is specified in the individual examples, is determined as follows: curing is considered from the moment of mixing until introduced into the foam rod pulls the thread.

Polyol a: polypropyleneoxide - simple polyester with a molecular mass of 600 g/mol based on a mixture of sucrose/glycerin.

Polyol B: polypropyleneoxide - simple polyester with molecular weight 1000 g/mol and based on propylene glycol.

Polyol b: polypropyleneoxide - simple polyester with molecular weight of 630 g/mol based on a mixture of sucrose/propylene glycol.

Polyol G: polypropyleneoxide - simple polyester with a molecular weight of 370 g/mol based on glycerin.

Polyol D: polypropyleneoxide - simple polyester with molecular weight of 345 g/mol, based on Ethylenediamine.

Polyol E: polypropyleneoxide - simple polyester with molecules of the Soi 375 g/mol based on the anhydride of phthalic acid, diethylene glycol and ethylene oxide.

Polyol C: polypropyleneoxide - simple polyester with molecular weight of 1120 g/mol based on triethanolamine.

Polyol I: polypropyleneoxide - simple polyester with a molecular weight of 560 g/mol based on toluylenediamine.

Polyol K: polypropyleneoxide - simple polyester with molecular weight of 275 g/mol, based on Ethylenediamine.

Polyol L: a simple polyester-based trimethylpropane with the number HE 550, containing 70% propylenoxide and 30% ethylenoxide links.

Polyol M: a simple polyester-based on-toluylenediamine with the number HE 410, containing 70% propylenoxide and 30% ethylenoxide links.

Polyol H: easy polyester-based on-toluylenediamine with the number HE 400 with 100% propylenoxide links.

Polyol A: a simple polyester from a mixture of sucrose/ethylene glycol/propylene glycol with a number HE 380, containing 100% propylenoxide links.

Polyol P: plain polyester-based glycol with a number HE 112 containing 100% propylenoxide links.

Polyol D: a complex polyester from a mixture of phthalic anhydride/diethylene glycol with a number HE 310, containing 100% propylenoxide links.

Examples
Example 1 (not according to the method of the invention)

Silicone stabilizer - 2.0 wt.h.

An activator mixture consisting of activator Decorated PV (Bayer), activator Decorated W (Bayer) and potassium acetate (25%) in diethylene glycol and 3.5 wt.h.

100 wt. parts of a component And mixed with 17 wt. parts of the CFC R11 at 20oC and 145 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form at 32 kg/m3.

Example 2 (not according to the method of the invention)
The formulation for rigid polyurethane foam
Component And
Polyol b - 55 wt.h.

Polyol G - 25 wt.h.

Polyol D - 20 wt.h.

Water - 2.0 wt.h.

Silicone stabilizer - 2.0 wt.h.

An activator mixture consisting of activator Decorated PV (Bayer), activator Decorated W (Bayer) and potassium acetate (25%) in diethylene glycol - 2.0 wt.h.

100 wt. parts of component a are mixed at 20oC with 12 wt. parts of cyclopentane (firm Abdolhamid) and 151 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form at 38 kg/m3.

Example 3 (not according to the method of the invention)
The formulation for rigid polyurethane foam
Component And
Polyol A - 50 wt.h.

Polyol E - 40 wt.h.

Polyol G - 10 wt.h.

Water - 2.0 wt.h.

p), activator Decorated W (Bayer) - 2.5 wt.h.

100 wt. parts of component a are mixed at 20oWith 13 wt. parts of cyclopentane (firm Abdolhamid) and 148 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form at 38 kg/m3.

Example 4 (not according to the method of the invention)
The formulation for rigid polyurethane foam
Component And
Polyol - 50 wt.h.

Polyol D - 25 wt.h.

Polyol C - 25 wt.h.

Water is 2.2 wt.h.

Silicone stabilizer - 2.0 wt.h.

An activator mixture consisting of activator Decorated PV (Bayer), activator Decorated (Bayer) - 1.5 wt.h.

100 wt. parts of component a are mixed at 20oC 11 Mac. parts of ISO-, n-pentane (8:3) and 142 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form with 36 kg/m3.

Example 5 (not according to the method of the invention)
The formulation for rigid polyurethane foam
Component And
Polyol b - 55 wt.h.

Polyol G - 20 wt.h.

Complex polyetherpolyols Stepanpol(Stepan company) - 25 wt.h.

Water is 2.1 wt.h.

Silicone stabilizer - 2.0 wt.h.

An activator mixture consisting of activator Decorated PV (Bayer), is lapetina (firm Abdolhamid). The mixture (component a+cyclopentane), loneliness and immediately splits.

Example 6 (not by the method of the invention)
The formulation for rigid polyurethane foam
Component And
Polyol b - 55 wt.h.

Polyol G - 20 wt.h.

Complex polyetherpolyols Stepanpol2352 (Stepan company) - 25 wt.h.

Water is 2.3 wt.h.

Silicone stabilizer - 2.0 wt.h.

An activator mixture consisting of activator Decorated PV (Bayer), activator Decorated W (Bayer) - 1.5 wt.h.

100 wt. parts of a component And mixed with 11 wt. parts of ISO-, n-pentane (3:8). The mixture (component a+ISO-, n-pentane), loneliness and immediately splits.

Example 7 (according to the invention)
The formulation for rigid polyurethane foam
Component And
Polyol B - 40 wt.h.

Polyol And 20 wt.h.

Polyol K - 15 wt.h.

Complex polyetherpolyols Stepanpol2352 (Stepan company) - 25 wt.h.

Water and 2.4 wt.h.

Silicone stabilizer - 2.0 wt.h.

Activator Decorated PV (Bayer) - 1.4 wt.h.

The activator is N,N',N"-Tris-dimethylaminopropyl)-hexahydrotriazine - 0.4. PM

100 wt. parts of component a are mixed at 20oWith 15 wt. parts cyclopentane at 34 kg/m3.

Example 8 (according to the invention)
The formulation for rigid polyurethane foam
Component And
Polyol B - 20 wt.h.

Polyol And - 40 wt.h.

Polyol K - 15 wt.h.

Complex polyetherpolyols Stepanpol2352 (Stepan company) - 25 wt.h.

Water and 2.4 wt.h.

Silicone stabilizer - 2.0 wt.h.

Activator Decorated PV (Bayer) - 1.4 wt.h.

The activator is N,N',N"-Tris-dimethylaminopropyl)-hexahydrotriazine - 0.4. PM

100 wt. parts of component a are mixed at 20oWith 15 wt. parts of cyclopentane (firm Abdolhamid) and 157 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form with 34 kg/m3.

Example 9 (according to the invention)
The formulation for rigid polyurethane foam
Component And
Polyol - 10 wt.h.

Polyol And 50 wt.h.

Polyol K - 15 wt.h.

Complex polyetherpolyols Stepanpol2352 (Stepan company) - 25 wt.h.

Water and 2.4 wt.h.

Silicone stabilizer - 2.0 wt.h.

Activator Decorated PV (Bayer) - 0.5.h.

Activator dimethylpropylene - 0.5.h.

The activator is N,N',N"-Tris-dimethylaminopropyl)-hexahydrotriazine - 0.4. The and prepolymer (E 577 Bayer Corporation) at 20oWith and subjected to compaction in a covered form with 36 kg/m3.

Example 10 (according to the invention)
The formulation for rigid polyurethane foam
Component And
Polyol B - 40 wt.h.

Polyol G - 10 wt.h.

Polyol And 50 wt.h.

Water - 2.5 wt.h.

Silicone stabilizer - 2.0 wt.h.

Activator Decorated PV (Bayer) - 0.5.h.

Activator Decorated 726 (Bayer) - 1.6 wt.h.

100 wt. parts of component a are mixed at 20oC 13 Mac. parts of cyclopentane (firm Abdolhamid) and 135 wt. parts of crude MDI (Desmodur 44V20, Bayer) and subjected to compaction in a covered form at 35 kg/m3.

Example 11 (according to the invention)
The formulation for rigid polyurethane foam
Component And
Polyol B - 20 wt.h.

Polyol And 45 wt.h.

Polyol K - 15 wt.h.

Complex polyetherpolyols Stepanpol2352 (Stepan company) - 20 wt.h.

Water and 2.4 wt.h.

Silicone stabilizer - 2.0 wt.h.

Activator Decorated PV (Bayer) - 1.2 wt.h.

The activator is N, N', N"-Tris-(dimethylaminopropyl)-hexahydrotriazine - 0.4.h.

100 wt. parts of component a are mixed at 20oC 13 Mac. parts of ISO-, n-pentane (3:8) and 151 wt. parts of crude MDI (Destiny composition data component, containing polyols L-R, and data dependency.

The results of the tests obtained in examples 1-11 plates of the foams are presented in table 2.

Example 1 typical result confirms R11-restored system.

Examples 2 and 3 describe cyclopentenopyridine system corresponding to the prior art, which have normal values of thermal conductivity. Although in example 3 describes compositions containing the complex-simple polyester and, according to this invention, an activator mixture, which leads to time-binding 29, was defined normal conductivity.

Example 4 describes a system with ISO-, n-pentane as a pore-forming means according to the prior art.

In examples 5 and 6 do not contain amine-initiated polyols, polycomposite has no phase stability on cyclopentane and cannot be expanded in the usual method.

Examples 7-10 show that obtained according to this invention the foam with cyclopentane as blowing agent acquire as low values of thermal conductivity, as in the case of R11-recovered blowing agent.

Example 11 shows that poloczanska thermal conductivity.

The results of the tests obtained in examples 12-17 plates of the foams are shown in the following table 3.


Claims

1. Method of production of rigid polyurethane foams with low thermal conductivity from polyols and polyisocyanates, as well as pore-formers and optionally a blowing means, characterized in that the rigid polyurethane foams produced by interaction A. polycomponent containing (1) at least one complex polyetherpolyols with a molecular mass of from 100 to 30,000 g/mol with at least two hydrogen atoms reactive toward isocyanates, (2) aminopolyamide with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive towards isocyanate and at least one tertiary nitrogen atom, (3) polyethers with a molecular weight of from 150 up to 12,500 g/mol, containing at least two hydrogen atoms, reactive toward isocyanates, (4) catalysts, (5) 0.5 to 7.0 wt. including water, counting to 100 wt. including the component, (6) the pore-forming alkanes or a mixture of alkanes and (7) optionally, auxiliary substances and/or additives with B. organic and/or modified organic polyisocyanate with is that as polyetherpolyols (1) use sophisticated polyester with molecular weight from 100 to 30 000 g/mol of the aromatic and/or aliphatic mono-, di - and tricarboxylic acids and of polyols having at least two hydroxyl groups.

3. Method of production of rigid polyurethane foam under item 1 or 2, characterized in that as component (2) use aminopolyamide based 70-100 wt. % 1,2-propylene oxide and 0-30 wt. % of ethylene oxide initiated by o-toluylenediamine.

4. Method of production of rigid polyurethane foam under item 1, characterized in that as component (2) use aminopolyamide on the basis of 50-100 wt. % 1,2-propylene oxide and 0-50 wt. % of ethylene oxide initiated by Ethylenediamine.

5. Method of production of rigid polyurethane foam under item 1, characterized in that as component (2) use aminopolyamide on the basis of 50-100 wt. % 1,2-propylene oxide and 0-50 wt. % of ethylene oxide initiated by triethanolamine.

6. Method of production of rigid polyurethane foam under item 1, characterized in that the component (3) contains a polyester-based 70-100 wt. %1,2-propylene oxide and 0-30 wt. % of ethylene oxide initiated by sucrose.

7. Method of production of rigid polyurethane foam under item 1, characterized in that the component (3) contains a polyester-based 70-100 wt. % of propylene oxide and 0-30 wt. % of ethylene oxide initiated by sorbitol.

8. The method of obtaining hard peopol-30 wt. % of ethylene oxide initiated with trimethylolpropane.

9. Method of production of rigid polyurethane foam under item 1, characterized in that the component (3) contains a polyester-based 70-100 wt. % 1,2-propylene oxide and 0-30 wt. % of ethylene oxide initiated with glycerine.

10. Method of production of rigid polyurethane foam under item 1, characterized in that as the pore-forming (6) use a cyclopentane or n - and/or ISO-pentane.

11. Method of production of rigid polyurethane foam under item 1, characterized in that as the pore-forming (6) use cyclopentane, or 2,2-di-methylbutane, or n-butane or ISO-butane, or mixtures thereof.

12. Method of production of rigid polyurethane foam under item 1, characterized in that as the pore-forming (6) using n - or ISO-pentane or cyclopentane, or cyclohexane, or mixtures thereof.

13. Rigid polyurethane foams obtained according to one of paragraphs. 1-12, as a layer constituent elements and material for filling cavities.

 

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FIELD: organic chemistry, polymer materials.

SUBSTANCE: polyester-polyols are obtained by double metalcyanide catalyzed polyaddition of alkylenoxide to starting material containing active hydrogen atoms. Alkylenoxide is continuously fed into reactor during induction period while maintaining constant pressure in reactor.

EFFECT: method for polyester-polyol production with decreased induction time.

2 ex, 1 dwg

FIELD: organic chemistry, in particular polyol composition for cold-cured polyurethane production.

SUBSTANCE: claimed composition contains (pts mass): polyethertriol or mixture of polyethertriol with molecular weight of 4500-6500 and average hydroxyl functionality of 3 - 100; ethylene glycol - 3.5-6.2; 1-4-butandiol - 3,5-8,0; triethylene diamine - 0.53-0.65; water - 0.25-0.50; organosilicate foam regulator - 0.002-0.004; and high boiling by-product from isoprene production based on alkyl- and oxyalkyl-substituted dioxacyclanes (e.g., 1,3-dioxane containing 1-4 mass % of hydroxyl groups) as organic filler - 2-100. Said filler may be used in mixture with oil plasticizer. Polyurethane obtained according to present method has Shore A hardness of 20-50, and is useful in automobile industry, and as material for gasket and sealing.

EFFECT: composition for production of polyurethane with increased hardness.

2 cl, 1 tbl, 3 ex

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