Composition for the production of rigid foam isocyanatomethyl

 

The invention relates to compositions for the production of rigid isocyanatomethyl foams. Disclosed composition for the production of rigid isocyanatomethyl foam, including 24,0-29,0 wt.h. trichloracetate, 0.7 to 0.9 wt. including potassium salt of di-(alkylpolyglycoside)ester of phosphoric acid, 6,0-9,0 wt.h. kalogeropoulou, 1.0 to 1.9 wt.h. the catalyst for the trimerization and 45.0-55,0 wt.h. isocyanatobenzene component, and as a catalyst for the trimerization it contains a solution of potassium salt of resorcinol in glycol at a mass ratio of 1.0:3.0 to 4.5 respectively, where the glycol is ethylene glycol or diethylene glycol. The invention improves the fire resistance of the obtained foam while maintaining the physico-mechanical characteristics. table 2.

The invention relates to compositions for the production of rigid isocyanatomethyl foams and can be used for the manufacture of coatings and products with high resistance belonging to the group G2 combustibility according to GOST 30244-94 used in construction, machinery, shipbuilding, refrigeration, energy.

Known composition to obtain a hard menopol is, aluminium hydroxide, tertiary amine, a catalyst solution of alkali metal carboxylate in the glycol and a polyisocyanate (patent RU N 2128676, CL 08 G 18/16, 18/30, 08 L 75/04, 1999). In this composition to reduce the Flammability of uses including aluminium hydroxide, which is introduced into the hydroxyl-containing component in the form of powder, insoluble in hydroxyl-containing component.

The disadvantages of the specified composition is increased abrasive wear of the dosing and mixing devices, which dramatically reduces the lifetime of the equipment. In addition, in the manufacture of specified composition increased energy costs due to the need of continuous stirring the mixture to prevent settling of aluminium hydroxide and its distribution within the volume of the hydroxyl-containing component.

Known catalysts for the trimerization of isocyanates: the alcoholate, the reaction and carboxylates of alkali metals and hydroxides of alkali metals (US patents 5691440, 1997, US 5714565, 1998). A mixture of tertiary amine and a solution of alkali metal carboxylate in the glycol described in patent RU 2128676, 1999.

The disadvantages of the foams obtained with their use, are fragile and Flammability level group G3.

Most uretanovaja foam, consisting of a mixture of the product of the interaction of tall oil with triethanolamine, a blowing agent, surfactant and catalyst for the trimerization of excess MDI, which is selected as a prototype. As surface-active substances are used organosilicon compounds or potassium salt of di-(alkyltrimethyl)ester of phosphoric acid, and as a catalyst for the trimerization use 30% solution of potassium acetate in ethylene glycol (patent RU 2034858, class C 08 G 18/08, 1995). Obtained by this method foams have high physical and mechanical characteristics.

To the disadvantage of the prototype is the use of the product on the basis of tall oil (100 wt.h. on 230-390 wt.h. MDI), which does not allow to obtain foams with stable physical and mechanical properties due to the high dependence of the qualitative and quantitative composition of tall oil from rocks of processed wood, place of growth wood, time of harvesting mode of transportation and technological parameters pulping, a byproduct of which is tall oil.

In addition, the use of the product of the interaction of Tallo is the group of combustibility G3 and G4, that significantly limits the scope of their application.

The technical result of the invention is to increase the fire resistance of the foam to the group G2 combustibility while maintaining the physico-mechanical characteristics.

The invention consists in that the composition for the production of rigid isocyanatomethyl foam includes trichlorethylene, potassium salt of di-(alkylpolyglycoside)ester of phosphoric acid, halogenougljovodonika, a trimerization catalyst and isocyanatomethyl component, and as a catalyst for the trimerization is applied a solution of potassium salt of resorcinol in glycol at a mass ratio of 1.0:3.0 to 4.5 respectively, where the glycol is ethylene glycol or diethylene glycol in the following ratio, wt.h.: Trichloroethylphosphate - 24,0 - 29,0 Potassium salt of di-(alkylpolyglycoside)ether phosphoric acid - 0.7 - 0.9 Halogenougljovodonika - 6,0 - 9,0 above solution of the potassium salt of resorcinol in glycol as a catalyst for the trimerization - 1,0 - 1,9 Isocyanatomethyl component - 45,0 - 55,0 In the composition used potassium salt of di-(alkylpolyglycoside)ester of phosphoric acid of General formula

As kalogeropoulou composition contains freon (a mixture of freon) with a boiling point of 20-40oWith, preferably a Halocarbon 11 (Trichlorofluoromethane) and Halocarbon 113 (trichloro-trifluoroethane).

The trimerization catalyst contains 1.0 wt.h. mono-potassium salt of resorcinol (1,3-dioxybenzone), or di-potassium salt of resorcinol or mixtures thereof and 3.0-4.5 wt.h. of ethylene glycol or of diethylene glycol.

As isocyanatobenzene component of the composition comprises a polyisocyanate or diphenylmethanediisocyanate.

Example 1.

The trimerization catalyst consists of a mixture of mono - and di-potassium salt of resorcinol in their mass ratio of 1.0:1.0 in the diethylene glycol, at a mass ratio of potassium salt of resorcinol and diethylene glycol 1,0:3,8.

The composition contains 27 wt.h. trichloracetate, 0,8 wt.h. Oxytoca B, 7.5 wt.h. halon 11, 1.4 wt.h. the trimerization catalyst, are mixed until complete averaging and 50 wt.h. MDI.

The obtained closed-cell insulation foam has the following physico-mechanical characteristics: Apparent density, kg/m3- is 56.4
Compressive strength at 10% linear strain, MPa - 0,27
Conditional fragility, % - 16,5 The temperature of the flue gases,oWith no more than 235
The extent of damage along the length, %, not more than 85
The degree of damage by mass, %, not more (for groups G2 and G3) - 50
Self-burning, with no more than 30
The foam of example 1 after firing tests gave the following results:
The temperature of the flue gases,oC - 119
The extent of damage along the length of, % - 80
The degree of damage by weight, % - 12,8
Self-burning, C - 22
On the basis of the tests it is concluded that the material belongs to the group G2 combustibility.

Example 2
Composition analogous to example 1 using the components shown in table 1. As the potassium salt of resorcinol uses a mixture of mono - and di-potassium salt in their mass ratio 1,0:2,0.

Example 3.

Composition analogous to example 1 using the components shown in table 1. As the potassium salt of resorcinol uses a mixture of mono - and di-potassium salt in their mass ratio of 2.0:1.0 in.

Example 4.

Composition analogous to example 1 using the components shown in table 1. As the potassium salt of resorcinol is used mono-potassium salt.

Example 5.

Composition similar to example 1 with use the/p> Example 6 (control).

As the trimerization catalyst is a solution of potassium phenolate with ethylene glycol in their mass ratio 1,0:3,0.

The resulting foam has a higher conditional fragility than in examples 1-5, belongs to the group of combustibility G3 due to the parameter "degree of damage along the length, which is 100%.

Example 7 (control).

As the trimerization catalyst is a solution of potassium acetate in ethylene glycol in their mass ratio 1,0:3,0.

The fragility of the obtained foam is higher than in examples 1 to 5 and reference example 6. He belongs to the group of combustibility G3 because of the settings, the extent of damage along the length, which is 100%, and "self-burning", which is 73 C.

Example 8 (prototype).

The resulting foam refers to a group of combustibility G4, because the parameter "degree of damage by weight" exceeds 50%.

The claimed composition significantly reduces the Flammability of foam (with G4 in the prototype to G2 in the claimed composition), while maintaining a high level of physical and mechanical characteristics that are close to the prototype.

Table 2 also illustrates the present invention.


Formularadalta, potassium salt of di-(alkylpolyglycoside)ester of phosphoric acid, halogenougljovodonika, a trimerization catalyst and isocyanatomethyl component, characterized in that as a catalyst for the trimerization it contains a solution of potassium salt of resorcinol in glycol at a mass ratio of 1.0: 3.0 to 4.5 respectively, where the glycol includes ethylene glycol or diethylene glycol, in the following ratio, wt. including :
Trichloroethylphosphate - 24,0-29,0
Potassium salt of di-(alkylpolyglycoside)ether phosphoric acid - 0,7-0,9
Halogenougljovodonika - 6,0-9,0
This solution of the potassium salt of resorcinol in glycol as a catalyst for the trimerization - 1,0-1,9
Isocyanatomethyl component - 45,0-55,0

 

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