SU1752741A1 - Composition for polling hard foamed polyurethane production - Google Patents

Abstract

Use: in construction, in light industry for the manufacture of household goods. SUMMARY OF THE INVENTION: in a composition comprising 96 - 98 mash, polyoxypropylene hexylitol, mol. 800, 0.8 - 1.2 ma.h of silicone emulsifier and 96.1 - 97.2 May, polyisocyanate with a mass fraction of NCO-rpyrm of 30-31%, additionally 2-4 ma.h. N, N, N -tris (/ -oxyethyl) hexahydro-5-triazine and 6 - 8 ma.h dioctyl phthalate. The composition is poured into heated to 50-60 ° & form. 1 tab.

Description

The invention relates to the field of the production of rigid polyurethane foams used in the manufacture of products for cultural and community purposes and in construction.

A known composition for the preparation of rigid polyurethane foam, which contains tall oil, trizthanololamine, trichloroethyl phosphate, an emulsifier and a frothing agent. The disadvantages of polyurethane foams are their relatively low physicomechanical properties, as well as the content of a significant amount of freon, which leads to an increase in linear shrinkage. Also known is a composition consisting of a sucrose-based polyol, a catalyst (a mixture of dimethylethanolamine and triethylet diamine), a silicone water-freezing stabilizer, a non-halogen-containing plasticizer (butyl benzyl phthalate), and a polyisocyanate. 2 The disadvantages of the composition are its multi-component.

relatively low strength indicators of polyurethane foams based on it.

The most basic component of the invention is a composition for the preparation of rigid polyurethane foams, including polyoxypropylene xylytols mol.m. 800 N, N, N, N-tetraoxypropylene-ethylenediamine, water and / or freon, silicone emulsifier, polyisocyanate with a mass fraction of NCO-rpynn30-31%

The composition of the composition is the following, mac;

Polyoxypropenoxylitol mol% 800

N, N, N, N - -Tetrooxypropyl ethylenediamine

Freon 11

Water

Organosilicon

emulsifier

Polyisocyanate with mass

shares NCO-rpynn 30-31 125-180

60-90

40- 12 0-50 0.2-2.0

0-4,0

The disadvantages of this composition are relatively low values of compressive strength, impact strength and high linear shrinkage of polyurethane foams based on it.

The purpose of the invention is to increase the compressive strength, toughness, decrease the temperature linear shrinkage of rigid polyurethane foams.

The goal is achieved by the fact that the composition additionally contains N, N, N tris (/} - hydroxyethyl) hexahydro-5-triazine and di-octyl phthalate at a ratio of components, wt.

Polmoxypropylenediamine mol. 80096-98 m

N, N, N -tris-p -oxystil) hexahydro-3-triazin2-4

Dioctyl phthalate6-8

Silicone emulsifier 0.8-1.2

Polyisocyanate with a mass fraction of NCO-rpynn 30 31% 96.1 - 97.2 The proposed composition has HSRVY properties that do not coincide with the properties of known compositions and which are not described in the literature. These new properties consist in higher values of compressive strength, impact strength and low temperature linear shrinkage (see table).

For the preparation of the composition, polyoxypropylene xitol C mol.m 800 according to TU 6-05-1679-83, N, N, N trme-α-oxchetyl) hexahydroz-triazine with mole 219, hydrochloride groups of 23.3 %, tertiary nitrogen concentration 19.1%, organosilicon emulsifier according to TU 6-02-813- 73, polyisocyanate with a mass fraction of NCO-rpynn 30–31%, dioctyl phthalate according to GOST 822-66.

The invention is illustrated by the following examples.

The composition for the preparation of polyurethane foam consists of components A and B. Firstly, component A is weighed according to a specific formulation given in

the table is stirred with a disk stirrer with a speed of 3000 rpm for 2-3 minutes. Then a pre-weighed amount of component B (polyisocyanate with a mass fraction of NCO-rpynn 30-31%) is added, stirred with the same stirrer 10-12 with and poured into a mold with a size of 160x x 180 x 70 mm, preheated to 50 - 60 ° C. After that, the mold is cooled, the light-yellow polyurethane foam unit is removed and the physicomechanical properties are determined.

The data show that the poured polyurethane foam of the invention has higher compressive strength, impact strength and low linear shrinkage.

The use of the composition for producing polyurethane foam makes it possible to increase the impact strength by 1.8-1.4 times, compressive strength 1.1-1.3 times, and reduce linear shrinkage 1.6-2-3 times.

Claims (1)

Invention Formula A composition for producing a casting rigid polyurethane foam comprising a polyoxypropylene xylytol mol. 800, cream) Organic emulsifier and polyisocyanate with a mass fraction of NCO-rpynn, equal to 30–31%, which, in order to increase the compressive strength, impact strength, decrease the temperature linear shrinkage, it additionally contains M , N, N -tris- (/ -oxyethyl) hexahydro s-trichzin and dioctyl phthalate in the following ratio, May Potioxypropylene x molitol.m. 80096.0 - 98.0 N, N, N-tris (0-hydroxyethyl) hexahydro-3-triazine 2.0-4.0 Diokgilftalat6.0 - 8.0 Organosilicon emulsifier0.8 - 1.2 Polyisocyanates mass fraction of NCO-rpynn, equal to 30-31% 96.1 - 97.2 The composition and physico-mechanical properties of polyurethane foam casting Known 30 5-7 0.2 1.0 125 500 + 20 7,8 1.6 0.2-0.3