The method of obtaining modifier

 

(57) Abstract:

The invention relates to the field of rocket technology and concerns a method for obtaining a modifier, which is the basis for unsaturated polyester compounds. The method by including interaction within 3 hours at 80 ° C 10,00-14,07 wt.% toluylenediisocyanate with 76,0-of 76.8 wt.% low molecular weight hydroxyl-containing polybutadiene rubber until the content of isocyanate groups 3,0-4,0% with the formation of the urethane prepolymer, and then the interaction of the obtained prepolymer from 9.75-13,02 wt.% monomethacrylate ether of ethylene glycol in the presence of 0.18 wt.% dibutyltindilaurate tin for 2-7 hours at 60C. Get the modifier has brittle transition temperature of not higher than-C and a tensile strength of 120 kgf/cm2, a relative elongation of 49% and a strength of adhesion to ballistic fuel level of 26.4 kg/cm2that allows the use of this invention in obtaining various formulations, ensuring integrity of charges in a wide range of temperatures under conditions of exposure to high loads. table 2.

The present invention relates to the field of rocket technology and concerns a method for obtaining a modifier M-11-1, which is about the seal polyester resin (England 981684 from 11.05.61, SIR, C3R), which contain a mixture of unsaturated polyester and MDI dissolved in styrene. Unsaturated polyester is obtained from ethyl carboxylic acid and an excess of diatomic alcohol. The disadvantage of this unsaturated polyester resin, a modified polyisocyanate, is the use of linear monomer without alternating double bonds, which provides no performance properties of the finished charges in the region of low temeprature.

The closest component composition is a polymeric material with urethane groups (USSR №273424 (1133652/23-5), IPC C 08 G 22/08 - prototype) that could be used as an intermediate product for the preparation of fixing compositions in the manufacture of products brush type of high-energy ballistic fuel. But high requirements for products of this type, which are used in harsh temperature conditions, in the range from plus to minus 60C 60C, do not allow the use of this polymeric material due to high temperature embrittlement above minus 5C.

One of the main ways of lowering the glass transition temperature of the obtained material is used in the reaction is not oligomerov (as phlebotominae rubber content of hydroxyl groups in the range of 0.9 to 2.0%.

The technical task of the present invention is to provide a modifier for unsaturated polyester compositions having along with increased viability of high mechanical and adhesive characteristics, low temperature brittleness below minus S.

The solution of the above problem is due to the fact that in contrast to the known material proposed modifier instead of oligomerov contains hydroxycobalamin oligodiens, in particular low molecular weight hydroxyl-containing polybutadiene rubber with terminal hydroxyl groups.

The method of obtaining the modifier comprises two stages.

In the first stage receive a urethane prepolymer by interaction of a diisocyanate with a low molecular weight hydroxyl-containing polybutadiene rubber as the hydroxyl-containing unsaturated monomer at a temperature of 80C for 3 hours until the content of isocyanate groups 3,0-4,0%.

In the second stage, carried out the synthesis of the modifier to unsaturated polyester compositions interaction obtained urethane prepolymer with monomethacrylate ether of ethylene glycol in the presence of dibutyltindilaurate tin at a temperature of 60C and residual the initial ether of ethylene glycol 9,75-13,02

Toluylenediisocyanate 10,00-14,07

Low molecular weight hydroxyl-containing

polybutadiene rubber 76,0-76,8

Dibutyltindilaurate tin 0,18

The novelty of the invention lies in the fact that to make this modifier elastomeric properties at low temperatures (low temperature brittleness below minus S) recipe of the classic polyurethane composition introduced low molecular weight hydroxyl-containing polybutadiene rubber instead of simple and complex polyesters and oligomerov. In addition the use of retaining structures on the basis of this modifier in a wide temperature range, they have high mechanical and adhesive characteristics.

The claimed range of ratios between the components are determined experimentally and are optimal from the point of view of structure formation of polyurethane mesh, providing high mechanical and adhesive characteristics of the finished fixing composition. See the ratio (in weight. %) between the urethane prepolymer and monomethacrylates ether of ethylene glycol corresponds to their molar ratio 1,79-2.2 mol MEG 1.0 mol urethane fortisalberta with low molecular weight hydroxyl-containing polybutadiene rubber, taken in (1,6-3,4)-fold molar excess relative to the stoichiometry.

In appearance urethane prepolymer is a viscous clear liquid dark brown color.

In the second stage gain modifier interaction obtained urethane prepolymer with monomethacrylate ether of ethylene glycol, taken in 1,79-2,2 molar excess relative to the stoichiometry in the presence of dibutyltindilaurate tin.

In appearance modifier is a viscous brown liquid.

To obtain a modifier you can use ready-made urethane prepolymer on THE 2294-058-00151963-99, which is a product of the interaction of a diisocyanate with a hydroxyl-containing oligodienes. Table 1 shows the formulation of the proposed modifier in comparison with the prototype on the application number 273424 in weight percent. Properties of the proposed modifier and prototype are shown in table 2.

Table 2 shows that the polymeric materials obtained on the basis of the synthesized modifier, high level 83-148 kgf/cm2high adhesion to ballistic fuel (~30 kgf/cm2and sufficient elasticum ratio of the components within the limits specified in table 1.

Table 2 also shows that the temperature of the fragility of polymeric materials, assembled on the basis of the proposed modifier is in the region of low temperatures (below minus S). This indicator is a key requirement in the design of products from ballistic fuel as the temperature of operation is in the temperature range from 60 plus to minus 60C. This is achieved through the use of synthesis modifier urethane prepolymer based on low molecular weight hydroxyl-containing polybutadiene rubber or a product of the interaction of Oligocene with diisocyanate (urethane prepolymer SKU-DF-2).

Thus, the proposed method obtain a modifier for unsaturated polyester resins based on low molecular weight hydroxyl-containing polybutadiene rubber allows to derive the fastening structures with high physical-mechanical characteristics, providing fabricated charges in a wide range of temperatures.

The way to obtain a modifier for unsaturated polyester compositions interaction of diisocyanate with a hydroxyl-containing unsaturated monomer with subsequent what COCOM as hydroxyl-containing unsaturated monomer, at a temperature of 80C for 3 hours until the content of isocyanate groups 3,0-4,0%, and then by the interaction of the obtained urethane prepolymer with monomethacrylate ether of ethylene glycol in the presence of dibutyltindilaurate tin at a temperature of 60C and a residual pressure of 10 mm RT.article for 2-7 h in the following ratio, wt .%:

Monomethacrylate ether of ethylene glycol 9,75-13,02

Toluylenediisocyanate 10,00-14,07

Low molecular weight hydroxyl-containing

polybutadiene rubber 76,0-76,8

Dibutyltindilaurate tin 0,18

 

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FIELD: chemistry.

SUBSTANCE: invention relates to an amphiphilic polymer composition used in compositions of active substances used for protecting plants from pathogens, phytopathogens or wood destroying fungi, insects etc, or in compositions of additives to food products. The given composition is obtained by reacting (i) at least one hydrophobic polymer P1, which is made from ethylene unsaturated monomers M1, and (ii) at least one hydrophilic polymer P2, which is in form of aliphatic polyethers consisting of at least 50 wt % ethylene oxide groups, with (iii) at least one compound V containing isocyanate groups, which has functionality of 1.5-4.5 relative the isocyanate groups, and is selected from aliphatic, cycloaliphatic and aromatic di- and polyisocyanates, as well as from isocyanurates, allophanates, uretdiones and biurets. Ethylene unsaturated monomers M1 contain: (a1) from 50 to 99 wt % in terms of total amount of monomers M1, monomers M1a of general formula I and a2) from 1 to 50 wt % in terms of total amount of monomers M1, neutral monoethylene unsaturated monomers M1b, which differ from monomers M1a, and are selected from vinylaromatic monomers, C11-C20alkylacrylates and C11-C20alkylmethacrylates.

EFFECT: amphiphilic polymer composition promotes efficient solubilisation and stabilisation of water-insoluble active substances, which leads to increase in stability of such compositions of active substances with respect to demulsification processes during prolonged storage, during addition of an electrolyte and during dilution with water.

25 cl, 9 ex, 2 tbl

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