Foaming agent mixture, component, incombustible mixture precursor for preparing foamed plastics, and foamed plastics

FIELD: polymer production.

SUBSTANCE: invention relates to foaming agent mixture composed of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane, and also 1,1,1,2-tetrafluoroethane and/or 1,1,1,3,3-pentafluoropropane; to component containing above mixture, auxiliary substances or additives such as fire retardants or catalysts; and to incombustible mixture precursor containing polyols with ether and/or ester groups, which have molecular weight from below 400 and up to 10000 and more than 8 hydroxyl groups, and foaming agent mixture. Foaming agent mixture, component, and incombustible mixture precursor are destined for preparation of foamed plastics, particularly foamed polyurethanes.

EFFECT: improved inflammation temperature of mixtures intended for preparing high-quality foamed plastics.

6 cl, 2 ex

 

The present invention relates to mixtures of 1,1,1,3,3-pentafluorobutane (R-365mfc) and at least two other fluorocarbons and their use for obtaining foamed plastics (foams).

From the literature it is already known the use of partially fluorinated hydrocarbon as a blowing gas to obtain foamed plastics. Thus, in particular, in the application WO 98/27145 describes the use of mixtures of foaming agents containing 1,1,1,3,3-pentafluorobutane and other ftoruglevodorodnye connections, and if necessary, additional foaming agents, such as carbon dioxide, and intended to obtain a foam.

With regard to the foregoing, the present invention was based on the task to get better on the ignition temperature of the mixture, which would allow a simplified way to obtain, for example, foamed plastics with good quality properties.

This task is solved through the present invention. Proposed in the invention a mixture of foaming agents intended for use as a foaming gas in obtaining foamed plastics, contain or consist of

A) 1,1,1,3,3-pentafluorobutane and

B) 1,1,1,2,3,3,3-Heptafluoropropane, and

(B) 1,1,1,2-Tetrafluoroethane and/or 1,1,1,3,3-pentafluoropropane in the criminal code is mentioned below amounts:

(a) 100 wt. parts of a mixture of foaming agents account for a total of 65-85 wt. parts, preferably 75-85 wt. parts, components a) and B),

b) is 100 wt. parts specified in subparagraph (a) of the sum of components a) and B) 80-95 wt. parts preferably 83-90 wt. parts accounted for 1,1,1,3,3-pentafluorobutane, and the balance of this sum of components a) and B) accounted for 1,1,1,2,3,3,3,-Heptafluoropropane,

C) is 100 wt. parts of a mixture of a blowing agent at least 15 wt. parts fall to the share component).

The preferred mixture of foaming agents are characterized in that they consist of 20 components A), B) and C), per 100 wt. parts of this mixture foaming components 70-80 wt. parts of it falls on the sum of components a) and B), and 20-30 wt. parts fall to the share component).

Ignition temperature 1,1,1,3,3-pentafluorobutane is located on the border limits of Flammability; proposed in the invention is a mixture of superior also in terms of their qualities in relation to Flammability known mixtures, which include ftoruglevodorodnye HFC-365mfc. The mixture according to the invention is particularly suitable for use as a foaming gas upon receipt of foamed plastics with extremely high insulation properties, however, they can be used and 30 for other purposes, for example, as refrigerants, RAS is varicela or cleaners.

The composition of the highest quality for the purposes of the invention mixtures of blowing agents includes 80 wt.% a mixture of 87 wt. parts of ftoruglevodorodnye HFC-365mfc and 13 wt. parts of ftoruglevodorodnye HFC-227ea, a remaining 20 wt.% accounted for the 1,1,1,3,3-pentafluoropropane and ftoruglevodorodnye, HFC-134a, or a mixture of these two substances.

Proposed in the invention the mixture is especially effective can be used as a blowing gas to obtain foamed plastics, for example, by extrusion. Using this method of containing foaming agents thermoplastics directly produce foam plates, films or profiles. The foaming plastic mass takes place directly after exiting the extruder. According to the described technology can be obtained, for example, XPS and are you-foam (foamed materials based on polystyrene, respectively polyethylene).

Especially now proposed in the invention, the mixture can be applied to obtain a foam based on isocyanate. First of all, they are suitable for the production of rigid, as well as soft foams based on isocyanates, as well as foams integral structure.

Obtaining foamed materials based on isocyanates is known. Receipt and used for these purposes, the basic materials are described, for example, in the application of EPA-0381986, in "Ullmann"s Encyclopedia of Industrial Chemistry", 5th edition, T. And 21, it. 665-680; in applications WO 92/00345, 96/30439, 96/14354 and posted in the German application DE 4422714 A1.

As initial components can be used aliphatic, cycloaliphatic, analiticheskie, aromatic and heterocyclic polyisocyanates, for example, from 2 to 4 isocyanate groups. They contain aliphatic hydrocarbon residue with up to 18 C-atoms, a cycloaliphatic hydrocarbon residue with up to 15 C-atoms, an aromatic hydrocarbon residue with 6 to 15 C-atoms or analiticheskii hydrocarbon residue with 8 to 15 C-atoms. Particularly preferred source components from a technological point of view are, for example, 2,4 - and 2,6-toluylenediisocyanate, diphenylmethanediisocyanate,

polymethylenepolyphenylisocyanate or mixtures thereof. In addition to the above can also be used so-called "modified polyisocyanates, which contain carbodiimide groups, urethane groups, allophanate group, which groups, urea groups or Burenie group.

Other starting components include compounds with at least two reactive towards isocyanate hydrogen atoms. First of all refers to compounds with a molecular weight of from 400 to 10,000 which contain preferably from 2 to 8 hydroxyl what's groups and can in addition, to contain amino groups, tirinya group or carboxyl group. Most preferred for use in these purposes include simple and complex polyesters, polycarbonates and polyaminoamide containing from 2 to 8 hydroxyl groups.

Under certain conditions as the original component can also be used compounds that serve as the chain extension or cross-linking agent and preferably containing from 2 to 8 reactive towards isocyanates of hydrogen atoms. The molecular weight of such compounds is usually from 32 to 400. Instead of hydroxyl groups, or in addition thereto may be an amino group, tirinya group or carboxyl group.

If necessary, in addition to these basic components, you can use auxiliary substances and appropriate additives. Thus, in particular, could be further used chemical foaming agents, such as water. It is also envisaged the possibility of using catalysts, for example tertiary amines, such as dimethylcyclohexylamine, and/or organic metal compounds, such as tin salts of carboxylic acids. In addition, there may be used a surface-active additives such as emulsifiers or prestabilization, for example copolymers is of Roxana and polyethers, the moderators of response regulators of cellular structures, such as paraffins, fatty alcohols or dimethylpolysiloxane, pigments, dyes, flame retardants such as phosphate esters or phosphonate esters, such as trichloropropane. Then we can apply the aging inhibitors and stabilizers designed to protect from weathering, plasticizers, fillers, dyes, antistatic agents, additives for fine foam regulators, steam formation or compounds having biocidal action.

Suitable for successful use of the invention the catalysts described, for example, in the application WO 96/14354. These include organic amines, aminoalcohols and simple amino esters, such as morpholine connection, for example, dimethylcyclohexylamine, diethanolamine, a simple 2-dimethylaminoethyl-3-dimethylaminopropyl ether, a simple 2-dimethylaminoethyl ether, 2,2 simple-disorganizational ether, N,N-dimethylaminoethanol, N-dimethylmorpholine, as catalysts acceptable ORGANOMETALLIC compounds, such as compounds of tin, cobalt or iron. Thus, in particular, can be applied diktat tin, cobalt naphthenate, dilaurate dibutylamine and acetonylacetone iron.

Foaming agents can be used as such, i.e. without wisenut the data of auxiliary substances and additives. However, according to one of embodiments of the invention, the foaming agents used in conjunction with one or more auxiliary substances and additives mentioned above. Another object of the invention in accordance with it are intended for production of foamed plastics components containing the proposed invention in the mixture in an amount necessary for the effective foaming, as a foaming gas and at least one excipient and additive from the number above. In this case, the proposed mixture of foaming agents are preferably used in an amount of from 1 to 35 wt.%, and the rest up to 100 wt.% use of auxiliary substances and additives.

One of the preferred components to obtain foamed plastics according to the invention are pre-prepared mixture of the proposed therein a blowing agent and polyhydric alcohols (polyols), containing groups of complex and/or polyethers. This variant embodiment of the invention is described in more detail below.

Usually to obtain a foamed material first from various starting compounds are prepared in a so-called pre-mix (a mixture of precursors), which are then subjected to the interaction with the isocyanate. Tripolitania such a mixture predecessor polyols or polyethers, foaming agents, catalysts and optionally other additives are mixed together in prescribed quantities. Then the interaction of a mixture of the predecessor with the isocyanate, respectively, isocyanates, get the desired foamed material.

In the case of obtaining mixtures of precursors using these mixtures foaming agents when exceeding the critical number of foaming agents may be necessary to classify the entire system due to low ignition temperature as the fuel, although the mixture of foaming agents and polyols are not flammable.

A mixture of precursor according to the invention contain a polyol, and from 1 to 35 wt.%, preferably from 5 to 20 wt.%, we offer a blowing agent. A mixture of precursor can consist only of a blowing agent and polyol, however, their composition may include one or several of the above-mentioned auxiliary substances and additives in amounts of, for example, from 10 to 30 wt.%. Containing a mixture of the precursor of a blowing agent, polyol and used optionally auxiliary substances and additives amounts to 100 wt.%. Preferably used for obtaining a mixture of precursor polyols containing groups of simple or complex the x polyesters.

In the mixture of the precursor can contain, for example, 10-20 wt.%, preferably 10-15 wt.%, phosphorus compounds, preferably triethyl phosphate or trichlorophenolate.

Proposed in the invention component, respectively the mixture of the precursor polyol is subjected then by well-known methods interaction with isocyanate, respectively isocyanates and froth. Under the polyols include compounds with at least two reactive towards isocyanates hydrogen atoms. It is primarily about the compounds with a molecular weight of from 400 to 10,000 which contain preferably from 2 to 8 hydroxyl groups and may also contain amino groups, tirinya group or carboxyl group.

The mixture of the precursor according to the invention differs from these known mixtures have a higher degree of non. Thus 5 is simplified its storage and transport.

Another object of the invention are foamed plastics obtained by using the proposed therein a mixture of foaming agents.

Below the invention is explained in more detail by examples, which do not limit its scope.

Examples

Example 1: a Mixture of polyols

The group containing polyether polyol (Tercarol A350) was mixed with 10 wt.% staniv the existing agent (based on the polyol) and determined ignition temperature. As a blowing agent 15 was used three-component mixture of 80 wt. parts of fluorocarbons HFC-365mfc and HFC-227ea (in the ratio by weight of 87:13), and 20 wt. parts 1,1,1,3,3-pentafluoropropane. Ignition temperature determined according to DIN EN ISO 13736, is 15°C.

Example 2: Application of ftoruglevodorodnye HFC-134a

Analogously to example 1 to prepare a mixture, the precursor of the group containing simple ether polyol (Tercarol A350) and 10 wt.% three-component mixture of foaming agents, however, the difference is that instead of febraban it was attended by ftoruglevodorodnye HFC-134a. The ignition temperature was determined according to DIN EN ISO 13736. 25 ignition Temperature could not be detected, because it lay outside the limit of detection.

1. The mixture of foaming agents to obtain foamed plastics, consisting of

A) 1,1,1,3,3-pentafluorobutane and

B) 1,1,1,2,3,3,3-Heptafluoropropane, and

(B) 1,1,1,2-Tetrafluoroethane and/or 1,1,1,3,3-pentafluoropropane in the following amounts:

a) 100 parts by weight of a mixture of foaming agents is necessary in the amount of 65 to 85 parts by weight of components a) and B),

b) per 100 parts by weight specified in subparagraph (a) of the sum of components a) and B) 80-95 parts by weight accounted for 1,1,1,3,3-pentafluorobutane, and the balance of this sum of components a) and B) accounted for 1,1,1,2,3,3,3,-Heptafluoropropane.

2. The mixture wspania the appropriate agents according to claim 1, characterized in that it consists of components A), B) and C), with 100 parts by weight of the mixture of foaming components 70-80 parts by weight falls on the sum of components a) and B), and 20-30 parts by weight accounted for by the component).

3. A component for obtaining foamed plastics, characterized in that it comprises a mixture of foaming agents according to claim 1 or 2 in an amount of from 1 to 35 wt.%, and the rest up to 100 wt.% accounted for excipients or additives such as flame retardants or catalysts.

4. Non-combustible mixture, the precursor to obtain a foamed plastic containing polyols with groups of simple and/or polyesters with a molecular weight of from 400 to 10,000 which contain more than 8 hydroxyl groups, characterized in that it contains from 1 to 35 wt.% a mixture of a blowing agent according to claim 1 or 2.

5. Non-combustible mixture, the precursor according to claim 4, characterized in that it contains from 5 to 20 wt.% a mixture of foaming agents.

6. Foamed plastics obtained using a mixture of foaming agents according to claim 1 or 2.



 

Same patents:

FIELD: polymer production.

SUBSTANCE: invention relates to production of polyurethane molded products having dense periphery and cellular core using a mixture of foaming agents, particularly containing 50-99% 1,1,1,3,3-pentafluorobutane (HPC 365 mfc) and 1-50% 1,1,1,2,3,3,3-heptafluoropropane (HPC 227 ea). Polyurethane molded products according to invention are characterized by density values varying between 300 and 600 kg/m3 and can be used as wood simulation.

EFFECT: expanded polyurethane foams production possibilities.

3 cl, 2 tbl

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to the foaming agent compositions and to methods for preparing polymeric foams by using such foaming agent compositions, foaming polymeric composition comprising such foaming agents, and to polymeric foams comprising such foaming agents. The suitable combinations of foaming agents involve: (a) composition comprising above 50 wt.-% of carbon dioxide of the composition mass and above 0 wt.-% of at least one fluorinated hydrocarbon with the boiling point above 14°C but below 120°C; (b) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 30°C but below 120°C; (c) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 14°C and below 120°C and at least one fluorohydrocarbon with the boiling point below 14°C, and at least one additional foaming agent chosen from water, alcohols, ketones and aldehydes. Polymeric foams comprising the foaming agents compositions comprise additionally the infrared radiating blocking agent chosen from the group consisting of carbon black, graphite, gold, aluminum and titanium dioxide dispersed in the indicated polymer. Polymeric foams prepared by using the foaming agents compositions show heat conductivity value less 35 mWt/m x °K later 90 days after their preparing.

EFFECT: improved and valuable properties of composition and polymeric foam.

6 cl, 6 tbl

FIELD: organic chemistry, foaming agents.

SUBSTANCE: invention relates to foaming agent-containing compositions that comprise at least one fluorohydrocarbon with boiling point above 30°C and lower 120°C, at least one fluorohydrocarbon with boiling point lower 30°C and at least one component chosen from low-boiling alcohols and low-boiling carbonyl compounds excepting for CO2. The foaming-agent-containing composition can comprise additional foaming agent chosen from the group consisting of carbon dioxide, nitrogen, argon, water, air, helium, aliphatic or cyclic hydrocarbons. Also, invention relates to methods for preparing polymeric foams by using such foaming agent-containing compositions and to polymeric foams, foaming polymeric compositions comprising such foaming agent-containing compositions. Polymeric foams prepared by using foaming agent-containing composition have closed-porous structure and heat conductivity value less 35 mW/m x °K after 90 days of its preparing.

EFFECT: valuable properties of agent and composition.

4 cl, 4 tbl

FIELD: polymer production.

SUBSTANCE: invention relates to foamed polyurethane molded products with thickened edge zone with simplified density and clearly expressed more soft cellular core. Soft to semi-rigid polyurethane integral foamed plastics are prepared by interaction of (i) organic and/or modified organic polyisocyanates or their polymeric precursors with (ii) at least one polyol component with hydroxyl number 20 to 200 and functionality 2 to 6, if necessary in combination with (iii) at least one polyol component with hydroxyl number 201 to 899 and functionality 2 to 3, and also (iv) at least one component functioning as chain extension and having hydroxyl number or amine number 600 to 1850 and functionality 2 to 4 in amount 3 to 20% based on the summary weight of (ii) and (iii), and, if necessary, (v) known additives, activators, and/or stabilizers in presence of 0.05-0.6% water (based on summary weight of (ii) and (iii)) and mixtures of pore agents containing 1,1,1,3,3-pentafluorobutane and at least one other fluoroalkane in amount 0.2-10% of the summary weight of components (ii)-(v). Thus obtained foamed plastics with integral structure are characterized by Shore hardness of edge zone 30 to 90, rigidity in compression deformation 30 and 350 kPa, and apparent density 150 to 900 kg/m3.

EFFECT: increased assortment of foamed plastics.

7 cl, 1 tbl, 9 ex

FIELD: polymer materials.

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EFFECT: improved insulating ability and stabilized dimensions.

16 cl, 4 tbl, 4 ex

The invention relates to a method for producing an extruded foamed sheet thermoplastic, which, in particular, serve as the raw material for molding containers, vats, substrates, ceilings vehicle or packaging panels, pallets

The invention relates to a new method of production of rigid polyurethane foam with a predominantly closed cell rigid polyurethane foams obtained by this method as a layer constituent elements and material for filling cavities

The invention relates to foamed hydrocarbon polyurethane foams, which can be used in the refrigeration industry

FIELD: polymer materials.

SUBSTANCE: extruded polymeric foamed plastic with closed cells is claimed showing heat conductivity according to European Norm EN-13164 of the order of 30 mW/m·oK or below and characterized by a wide molecular weight distribution. Product contains residues of foaming agents from as-formed foamed plastic cells using mixture of foaming agents, which includes: main foaming agent (one or more fluorine-containing carbon compounds and optionally carbon dioxide) and secondary foaming agent (C1-C4-alcohol, linear or cyclic C1-C5-hydrocarbon, alkyl halide, water, or mixture thereof).

EFFECT: improved insulating ability and stabilized dimensions.

16 cl, 4 tbl, 4 ex

FIELD: polymer production.

SUBSTANCE: invention relates to foamed polyurethane molded products with thickened edge zone with simplified density and clearly expressed more soft cellular core. Soft to semi-rigid polyurethane integral foamed plastics are prepared by interaction of (i) organic and/or modified organic polyisocyanates or their polymeric precursors with (ii) at least one polyol component with hydroxyl number 20 to 200 and functionality 2 to 6, if necessary in combination with (iii) at least one polyol component with hydroxyl number 201 to 899 and functionality 2 to 3, and also (iv) at least one component functioning as chain extension and having hydroxyl number or amine number 600 to 1850 and functionality 2 to 4 in amount 3 to 20% based on the summary weight of (ii) and (iii), and, if necessary, (v) known additives, activators, and/or stabilizers in presence of 0.05-0.6% water (based on summary weight of (ii) and (iii)) and mixtures of pore agents containing 1,1,1,3,3-pentafluorobutane and at least one other fluoroalkane in amount 0.2-10% of the summary weight of components (ii)-(v). Thus obtained foamed plastics with integral structure are characterized by Shore hardness of edge zone 30 to 90, rigidity in compression deformation 30 and 350 kPa, and apparent density 150 to 900 kg/m3.

EFFECT: increased assortment of foamed plastics.

7 cl, 1 tbl, 9 ex

FIELD: organic chemistry, foaming agents.

SUBSTANCE: invention relates to foaming agent-containing compositions that comprise at least one fluorohydrocarbon with boiling point above 30°C and lower 120°C, at least one fluorohydrocarbon with boiling point lower 30°C and at least one component chosen from low-boiling alcohols and low-boiling carbonyl compounds excepting for CO2. The foaming-agent-containing composition can comprise additional foaming agent chosen from the group consisting of carbon dioxide, nitrogen, argon, water, air, helium, aliphatic or cyclic hydrocarbons. Also, invention relates to methods for preparing polymeric foams by using such foaming agent-containing compositions and to polymeric foams, foaming polymeric compositions comprising such foaming agent-containing compositions. Polymeric foams prepared by using foaming agent-containing composition have closed-porous structure and heat conductivity value less 35 mW/m x °K after 90 days of its preparing.

EFFECT: valuable properties of agent and composition.

4 cl, 4 tbl

FIELD: chemistry of polymers, chemical technology.

SUBSTANCE: invention relates to the foaming agent compositions and to methods for preparing polymeric foams by using such foaming agent compositions, foaming polymeric composition comprising such foaming agents, and to polymeric foams comprising such foaming agents. The suitable combinations of foaming agents involve: (a) composition comprising above 50 wt.-% of carbon dioxide of the composition mass and above 0 wt.-% of at least one fluorinated hydrocarbon with the boiling point above 14°C but below 120°C; (b) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 30°C but below 120°C; (c) composition comprising carbon dioxide and at least one fluorohydrocarbon with the boiling point above 14°C and below 120°C and at least one fluorohydrocarbon with the boiling point below 14°C, and at least one additional foaming agent chosen from water, alcohols, ketones and aldehydes. Polymeric foams comprising the foaming agents compositions comprise additionally the infrared radiating blocking agent chosen from the group consisting of carbon black, graphite, gold, aluminum and titanium dioxide dispersed in the indicated polymer. Polymeric foams prepared by using the foaming agents compositions show heat conductivity value less 35 mWt/m x °K later 90 days after their preparing.

EFFECT: improved and valuable properties of composition and polymeric foam.

6 cl, 6 tbl

FIELD: polymer production.

SUBSTANCE: invention relates to production of polyurethane molded products having dense periphery and cellular core using a mixture of foaming agents, particularly containing 50-99% 1,1,1,3,3-pentafluorobutane (HPC 365 mfc) and 1-50% 1,1,1,2,3,3,3-heptafluoropropane (HPC 227 ea). Polyurethane molded products according to invention are characterized by density values varying between 300 and 600 kg/m3 and can be used as wood simulation.

EFFECT: expanded polyurethane foams production possibilities.

3 cl, 2 tbl

FIELD: polymer production.

SUBSTANCE: invention relates to foaming agent mixture composed of 1,1,1,3,3-pentafluoropropane and 1,1,1,2,3,3,3-heptafluoropropane, and also 1,1,1,2-tetrafluoroethane and/or 1,1,1,3,3-pentafluoropropane; to component containing above mixture, auxiliary substances or additives such as fire retardants or catalysts; and to incombustible mixture precursor containing polyols with ether and/or ester groups, which have molecular weight from below 400 and up to 10000 and more than 8 hydroxyl groups, and foaming agent mixture. Foaming agent mixture, component, and incombustible mixture precursor are destined for preparation of foamed plastics, particularly foamed polyurethanes.

EFFECT: improved inflammation temperature of mixtures intended for preparing high-quality foamed plastics.

6 cl, 2 ex

FIELD: polymer production.

SUBSTANCE: process comprises: polymerization in aqueous suspension of at least one vinylaromatic monomer in presence of suspending agent selected from phosphoric acid salts; discharging foamed granules from reaction vessel; washing thus obtained granules with aqueous solution containing 0.005-2% by weight nonionic surfactant; separating washed granules, whose surface contains no inorganic phosphoric acid salts; and drying these granules in air flow.

EFFECT: achieved lack of foam in effluent after washing of polymer being foamed.

8 cl, 1 tbl, 4 ex

FIELD: chemical industry; methods of production of the foaming styrene polymeric compounds containing the particles of carbon.

SUBSTANCE: the invention is pertaining to the present in the form of the granules of the foaming styrene polymeric compounds containing the carbon particles and having the low contents of pentane. The invention presents the description of the method of production of the foaming styrene polymeric compound, in which styrene is polymerized in the water suspension at presence from 0.1 up to 25 mass % of the graphite or smut particles and from 2.5 up to 5.5 mass % of pentane, all in terms of the monomers. After the water flushing, the produced mass is subjected to drying during less than 1 second by the air stream with the temperature from 50 up to 100°С. The invention also describes the granules of the styrene foaming polymeric compound with the bulked weight above 600 g/l. The granules contain from 0.1 up to 25 mass % of the particles of the graphite or the smut, and also the volatile foaming agent representing the mixture composed of from 2.2 up to 5.0 mass % of pentane and from 1 up to 10 mass % of the water, all in terms of the granules of the styrene foaming polymeric compound. The technical result of the invention is production of the granules of the styrene foaming polymeric compound with the high contents of the internal water at the low contents of pentane which possess the high capability to the foaming.

EFFECT: the invention ensures production of the styrene foaming polymeric compound granules with the high contents of the internal water and the low contents of pentane, which have the high capability to the foaming.

9 cl, 3 ex, 1 tbl

FIELD: chemistry.

SUBSTANCE: present invention pertains to the method of obtaining hard polyurethane or polyisocyanurate foams which can be used for making refrigerating machines. The method involves reaction of: (a) organic diisocyanate and/or polyisocyanate with (b) activated aromatic amine polyol, with ratio of equivalents of groups (a) to groups with active hydrogen (b) ranging from 0.9 to 3.0, in the presence of, (c) more carbon dioxide and water, and (d) C3-C5 fluorocarbon. The invention aims at designing a method of producing hard urethane foams, with good physical properties, including a low k-factor, using environmentally acceptable foaming agents. This given task is solved by that, HFC (hydrofluorocarbon) is used as the foaming agent, combined with water and supplementary carbon dioxide.

EFFECT: reduced minimum filling density and filling percentage, required for frost resistant foam plastics at -30°C, as well as the k-factor of the obtained foam plastic.

12 cl, 1 tbl, 6 ex

FIELD: chemistry.

SUBSTANCE: there is disclosed application of the composition containing at least one fluorohydrocarbon foaming agent and non-halogenated polar organic oxygen-containing compound of boiling temperature at atmospheric pressure within 30°C to 150°C for making polystyrene foam by plastic foam equipment designed so that to be applied with a foaming agent containing at least one chlorfluorohydrocarbon. Besides there is disclosed method for making foam polymers, implying application of said composition. There is also disclosed polystyrene foam composition containing at least one fluorohydrocarbon foaming agent and non-halogenated polar organic oxygen-containing compound of boiling temperature at atmospheric pressure within 30°C to 150°C, where content of non-halogenated polar organic compound is within 10 to 15 wt %.

EFFECT: simplified production process of high-quality product.

13 cl, 3 ex

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