Method of preparing polymer-polyol and dispersed polyol composition

FIELD: polymer production.

SUBSTANCE: in the first step of two-step polymer-polyol preparation, polyether, notably Laprol 5003 or Laprol 5003/Laprol 3003 mixture, is combined with polymer selected from group, including polystyrene, styrene-acrylonitrile copolymer, styrene-butadiene copolymer, acrylonitrile-butadiene-styrene plastic, and mixtures thereof, at temperature 100°C. In the second step, at 90°C and pressure 0.2 MPa, monomer selected from group including acrylonitrile, styrene, acrylate, vinylidene chloride, and mixtures thereof is added before addition of catalyst. Resulting mixture is stirred at 100-110°C and pressure 0.25 MPa.

EFFECT: enabled preparation of stable dispersion, reduced process cycle time, and lowered power consumption.

2 cl, 2 tbl, 5 ex

 

The invention relates to a method for production of polymeric polyols with a high dry matter content, to obtain dispersed polyol as one of the compositions, which are suitable for the production of highly elastic pinoresinol. Elastic peloritani widely used mainly in the automotive and furniture industries.

Known methods for producing the polymer polyol and polyol as one variance for elastic peloritana (application RU # 95113718, CL 08 G 18/40, 18/32, 20.03.97, bull. No. 8); in which the dispersion polyol modified polymer contains polyaddition product dispersed in the polyol. Polyaddition product is present in amounts of about 25-75 wt.% based on the total weight of polyaddition product and polyol. The dispersion has a viscosity of approximately 4000-50000 MPa*s, and the viscosity remains almost the same after obtaining a dispersion polyol-modified polymer.

The dispersion polyol and how you can get focused on obtaining the polyurethane polymer in the polyol, which is not always convenient in technology and increases the cost of dispersion due to the high cost of components.

The closest in technical essence is a polyol as one composition, elastic latexlady polyurethane foam and the molded product (U.S. Pat. RU # 2166516, class C 08 G 18/48, C 08L 71/00, 71/02, 75/08, from 10.05.2001).

Polyol as one whom azizia includes polyol with dispersed therein a polymer-polyol. The polymer-polyol obtained by dissolution in laminar mixing the polyol polymer or copolymer in an amount up to 40 machine hours at elevated temperature and pressure.

The composition comprises: (a) 80-99,5 m H. polymer polyol containing primary polyol. Having a molecular weight within 2500-6500, a primary hydroxyl content of at least 40% and a stable dispersed therein a polymer to the total mass of 100 machine hours; (C) 0.5 to 20 M.Ch. hydrophilic polyol having a molecular weight within 2000-5500 and primary hydroxyl content of at least 50%. As the polymer polyol used polystyrene, styrolacrylonitrile copolymer (SAN) or a polyurethane polymer. However, the process of obtaining the polymer-polyol with a large number of polymer is related to the duration of the dissolution of the polymer and the resulting polymer particles in the polyol have a large variation in size, which is not conducive to the stability properties of the resulting foam and molded products.

An object of the invention is to obtain a stable dispersion, reduction in time of the production cycle the polymer-polyol and the reduction of energy consumption for the process.

The problem is solved in that a method of obtaining a polymer polyol comprising two stages where the first stage is mixed polyester, which is used as Laprol 5003 or see the camping Laprol 5003 and Lapola 3003, with polymer selected from the group including polystyrene, styrene-Acrylonitrile copolymer, styrene-butadiene copolymer, Acrylonitrile-butadiene-styrene plastic, or mixtures thereof, at a temperature of 100°and in the second stage at a temperature of 90°and a pressure of 0.2 MPa is injected monomer selected from the group comprising styrene, Acrylonitrile, acrylate, or a mixture thereof, and then the catalyst, and the resulting mass is stirred at a temperature of 100-110°and a pressure of 0.25 MPa. Polyol as one of the dispersed composition containing 76,6-96,9 M.Ch. of polypropyleneglycol with a molecular mass of 2000-6000 and primary hydroxyl content of at least 40%, 2-20 M.Ch. polymer-polyol obtained by the method according to claim 1, and additives.

Distinctive features of the present invention is the fact that obtaining the polymer-polyol is carried out in two stages where the first stage is mixed polyester, which is used as Laprol 5003 or a mixture of Laprol 5003 and Lapola 3003, of the polymer, selected from the group including polystyrene, styrene-Acrylonitrile copolymer, styrene-butadiene copolymer, Acrylonitrile-butadiene-styrene plastic, or mixtures thereof, at a temperature of 100°and in the second stage at a temperature of 90°and a pressure of 0.2 MPa is injected monomer, selected from the group including styrene, Acrylonitrile, acrylate, or a mixture thereof, and then the catalyst the resulting mass is stirred at a temperature of 100-110° C and a pressure of 0.25 MPa. Polyol as one of the dispersed composition containing 76,6-96,9 M.Ch. of polypropyleneglycol with a molecular mass of 2000-6000 and primary hydroxyl content of at least 40%, 2-20 M.Ch. polymer-polyol obtained by the method according to claim 1, and additives.

Preparation of polymer polyol is associated with prolonged mixing of the components, the swelling of the polymer, its partial dissolution at elevated temperature and pressure with formation of a dispersion of solid polymer in the polyol. However, even prolonged stirring under these conditions does not always lead to the expected result. This is due to the instability of interfacial interaction on the border of the polyol polymer, to delamination during storage, resulting formed in the end elastic panorama not always satisfy technical requirements, and particularly it is connected with the deformation of the foam under load.

For the stability of interfacial interaction on the border of the polyol polymer in the present invention proposes the introduction of the second stage to obtain a polymer polyol in which a previously prepared mixture of the polyol and polymer is injected first monomer, and then the catalyst and under stirring, and under conditions of elevated temperature and pressure in the process of polymerization or copolymerization of the monomer. The process occurs on the surface the particular solid particles of the polymer, providing a change of interfacial interaction. Thereby achieve greater stability at the interface in polymer-polyol. Picking up a couple of the polymer, the monomer and the polyol based on the individual polyester or mixtures thereof, it is possible to achieve a high stability of dispersed polyol as one composition by using the proposed polymer-polyol. And high stability of dispersed polyol as one song will get high-quality elastic panoramas corresponding to the necessary technical requirements.

The invention is illustrated by the following examples.

Example 1. In a reactor with a volume of 0.05 m3with polyester-Laprol 5003 with molecular weight of 5000 and a primary hydroxyl content of 42-45% under stirring at a temperature of 100°injected With 20 M.Ch. of polystyrene relative to the polyester. Increase the reactor pressure up to 0.2 MPa and stirred for 10 hours. In the second stage the temperature in the reactor volume is reduced to 90°With injected under stirring Acrylonitrile 20 machine hours, then the catalyst is a peroxide tertbutyl. The resulting mass is stirred at a temperature of 100-110°and a pressure of 0.25 MPa for 6 hours. The results of the experiment are presented in table 1.

Example 2. Conditions shown in example 1. Polyester is a mixture of Laprol 5003 with molecular weight of 5000 and a primary hydroxyl content of 42-45% and La the roll 3003 with a molecular weight of 3000 and a primary hydroxyl content of 56-60% in the ratio of 1:1.

The polymer is a copolymer of styrene with Acrylonitrile in the amount of 26 M.Ch. In the second stage, enter 14 M.Ch. monomer mixture of styrene and Acrylonitrile in a ratio of 1:2. The results of the experiment are presented in table 1.

Example 3. Conditions shown in example 1. The polymer is a styrene-butadiene copolymer, the monomer is acrylic acid. The results of the experiment are presented in table 1.

Example 4. Conditions shown in example 1. Polymer-Acrylonitrile copolymer and Acrylonitrile-butadiene-styrene plastic in the ratio of 1:1. A monomer mixture of Acrylonitrile with vinylidenechloride in the ratio 2:1. The results of the experiment are presented in table 1.

Example 5 (prototype). Conditions shown in example 2. The second stage of the preparation of the polymer-polyol not. The amount of copolymer 40 machine hours mixing Time of 28 hours. The results of the experiment are presented in table 1.

Example 6. Polyol as one of the dispersed composition was prepared by mixing:

- polymer-polyol according to examples 1-5 - 10 M.Ch.

- polyester hydrophilic same as in examples 1-5 - 80 machine hours

a catalyst for the crosslinking "Terostat In 8681", octoate tin 0,25 M.Ch.

silicon organic product "Terostat 2770" - 2 M.Ch.

The resulting composition is white, the content of the polymer is 6%, the viscosity for different examples within 2800-4000 SDR.

The composition of the reaction mixture to obtain the elastic peloritana for all exampl is the same and contains:

dispersed polyol as one composition- 100 machine hours
supplements- 2 M.Ch.

a mixture of toluylenediisocyanate - 80/20 and a polyisocyanate-based metaphenylenediamine - 50 machine hours

Properties of the obtained elastic pinoresinol are shown in table 2.

Table 1

Properties of polymer-polyols
no experienceTotal time 1 and 2 stages hourThe viscosity at 25°S, SDRThe dry residue, %The average size of the polymer particles, micronsSmellThe stability of the dispersion at 45°within 30 days
1162950403,3weak+
216320040the 3.8weak+
3163250403,5-+
4163600404weak+
528410040the 5.7no22

Table 2

Features elastic pinoresinol obtained from reaction mixtures composed of polyline dispesner compositions (example 6) using the polymer polyols obtained in examples 1-5
IndicatorsExamples
12345
Density, kg/m3242222,524,520
Elasticity, %3734333632
The compression deformation under stress N kPa
10%0,850,70,650,80,55
20%2,01,71,71,9of 1.57
40%2,92,352,252,51,9

Comparing the performance of polymer-polyols (table 1), obtained by different methods, shows that the introduction of the second stage polymerization processes improves the stability of p is limer-polyol, reduces process time of its receipt and hence the energy consumption of the process (examples 1-5).

The obtained dispersed polyol as one composition based on polymer-polyols in examples 1-4 allow you to obtain the elastic peloritani, superior properties, primarily, by elastic deformation, similar peloritani received the prototype.

1. The method of obtaining the polymer-polyol comprising two stages where the first stage is mixed polyester, which is used as Laprol 5003 or a mixture of Laprol 5003 and Lapola 3003, of the polymer, selected from the group including polystyrene, styrene-Acrylonitrile copolymer, styrene-butadiene copolymer, Acrylonitrile-butadiene-styrene plastic, or a mixture thereof at a temperature of 100°and in the second stage at a temperature of 90°and a pressure of 0.2 MPa is injected monomer selected from the group comprising styrene, Acrylonitrile, acrylate, vinylidenechloride or mixtures thereof, and then the catalyst, and the resulting mass is stirred at a temperature of 100-110°and a pressure of 0.25 MPa.

2. Polyol as one of the dispersed composition containing 76,6-a 96.9 parts by weight of polypropyleneglycol with a molecular mass of 2000-6000 and primary hydroxyl content of at least 40 %, 2-20 parts by weight of the polymer polyol obtained by the method according to claim 1, and additives.



 

Same patents:
The invention relates to a method of manufacturing a composition for the energy and gas-generating devices

The invention relates to dispersions of polyalkyleneglycol that can be used to obtain ultra-soft polyurethane foam

The invention relates to hydrophilic processing of films made from styrene resins, and the use of modifiers to improve, for example, antistatic properties and sliding properties (slipperiness) films

The invention relates to compositions used in the extraction, transportation and preparation for processing of high-viscosity oils and oil emulsions

The invention relates to the preparation of oil and can be used for dehydration and desalting of crude oil with simultaneous protection of the equipment from asphaltene-paraffin deposits

Epoxy composition // 2186077
The invention relates to epoxy compositions used for gluing repair linings for pipes, metal structures for filling small defects, as anti-corrosion coatings

Repair part // 2186076
The invention relates to filled with metal compositions based on epoxy resins intended for repair of metal surfaces, in particular pipelines

The invention relates to the oil and petrochemical industry and can be used for breaking oil-water emulsions, protection of oilfield equipment from asphaltoresinparaffin deposits and corrosion

The invention relates to oil and the oil industry and can be used to destroy stable oil-water emulsions and protection of oilfield equipment from asphaltoresinparaffin deposits

FIELD: polymers, in particular composition for molded articles useful in building materials.

SUBSTANCE: claimed composition contains (A) 100 mass pts of vinyl chloride-based resin; (B) from 1 to 30 mass pts of graft copolymer obtained by graft polymerization; (C) from 0.1 to 5 mass pts of methylmethacrylate-based polymer obtained by two-step method in presence of polymer, wherein 0.1 g of said polymer in 100 ml of chloroform has intrinsic viscosity (ηsp) at 30°C of 0.7 or more and contains 0-50 mass % of methylmethacrylate repeated units, and 0.1 g of in two step obtained polymer in 100 ml of chloroform has intrinsic viscosity (ηsp) at 30°C of 0.5 or more; and (D) from 1 to 20 mass pts of calcium carbonate.

EFFECT: articles with high processibility, whether resistance, impact resistance and luster.

5 cl, 19 ex, 3 tbl

FIELD: polymer materials.

SUBSTANCE: composition comprises polyolefin A, containing anhydride function and having viscosity at least 20 g/10 min measured at 190°C and loading 2,16 kg, and epoxy function-containing product B destined for cross-linking polyolefin A. Relative proportions of A and B are such that for each epoxy function there are from 0.1 to 1.5 anhydride functions. Composition can be used in slush molding process, in thermal molding of sheets, or in on-rod casting process.

EFFECT: increased flowability resistance and wear resistance.

6 cl, 1 tbl, 6 ex

The invention relates to polymeric compositions and method of slow depolymerization

Polymer composition // 2171821
The invention relates to compositions containing graft copolymers of polypropylene, polycarbonate, aliphatic polyester and, optionally, a rubber component and/or polypropylene

The invention relates to compositions comprising graft copolymers, which include polystyrene grafted to the main chain or the basis of polypropylene, and in particular, this invention relates to compositions based on graft copolymers having a heterogeneous morphology, characterized in that the polypropylene is a continuous phase, and the polystyrene dispersed phase

Polymer composition // 2088614
The invention relates to polymeric compositions based on thermoplastic elastomer grafted copolymer of vinyl chloride (I) a copolymer of ethylene-vinyl acetate (EVA) for medical products that do not contain low molecular weight plasticizer, characterized by increased flexibility, transparency, resistance to various types of sterilization

Polymer composition // 2087496
The invention relates to the composition of the polymer composition on the basis of modified polymer of vinyl chloride (I) used, for example, for the manufacture of core-molded products, sheets, films, etc

Polymer composition // 2086584
The invention relates to polymeric compositions based on unplasticized polyvinyl chloride /PVC/ processed, for example, in molding articles /window and door frames/ s high white

FIELD: biochemistry.

SUBSTANCE: invention relates to neutral lipopolymer of formula 1 , wherein R1 and R2 independently are alkyl or alkenyl C8-C24-chain; n = 10-300; Z is selected from group consisting of hydroxyl, alkoxyl, benzyloxy, carboxyl acid ester, sulfonic acid ester, alkyl or aryl carbonate, amino, and alkylamino; L is selected from group comprising: (i) X-(C=O)-Y-CH2-, (ii) -X-(C=O)-, and (iii) -X-CH2-, wherein X and Y independently are oxygen, NH and direct bond with the proviso, that when L is -X-(C=O)-, X is not NH. Liposomal composition and method for prolongation of liposome circulating time also are disclosed.

EFFECT: neutral lipopolymer providing elongation of liposome circulating time.

11 cl, 5 ex, 6 tbl, 10 dwg

Up!