SU1752742A1 - Method of preparing hydroxyl-containing component for formed elastic polyurethane foam production - Google Patents

Abstract

Usage: in the furniture and automotive industries. The essence of the invention is polyoxyalkyleneglycerol with mol 4500 - 6000 and with a content of primary hydroxyl groups of 60-100 wt.%, Silicon foam controllers, nitrogen-containing catalyst and N, N, N, N -tertrohydroxypropylene penthylenediamine are mixed with talp oil with acid number 96 - 180 mg KOH / g or mixtures of tall oil with simple oligoether with ol. 3000 - 3600 and with a hydroxyl number of 39 - 56 mg KOH / g and from 10 to 60 wt.% of statically located oxygenated ethylene units at a temperature not higher than 35 ° C and then from 3 to 6 May of water per 100 May h polyoxyalkyleneglycerol. 2 tab. cl

Description

This invention relates to the chemistry of polyurethanes and relates to a method for producing a hydroxyl-containing component for the manufacture of flexible molded polyurethane foam (PUF), which can be used in the furniture and automotive industries.

A known method for producing a hydroxyl-containing component is by mixing hydroxy-alkylated triol with a mol of 4500-6000 and having 60-100 May% of primary hydroxyl groups, water, an organosilicate foam regulator, a nitrogen-containing catalyst and targeted additives. The disadvantage of this method is the low productivity of the process of obtaining the component and the practical difficulty

adjustments to the composition of the component in case of incorrect loading of one of the ingredients 1 and 2.

The closest to the invention in its technical essence is the method according to which the hydroxyl-containing component for flexible molded polyurethane foam is obtained by mixing polyoxyalkyleneglycerol with mol.m. 4500-6000 and first containing 60-100% by weight of primary hydroxyl groups Penoregul torom; then with an aqueous solution of a nitrogen-containing catalyst mM, N, N, N -tetrahydroxypropylene ethylene diamine- A mixture of tertiary amine is used as a nitrogen-containing catalyst

X |

new: 1,4-diazabicyclo (2, 2, 2) octane, dimethylethanolamine and triethylamine 3.

The disadvantage of the dacha method is the low stability (no more than 3 months) of the component in time.

The purpose of the invention is to increase the stability of the hydroxyl-containing component in viscosity.

Purpose Achieved by the fact that in a known method of producing a hydroxyl-containing component by mixing at a temperature not higher than 35 ° C polyoxyalkylene glycerol with a mol.m. 4500 - 6000 and with a content of primary hydroxyl groups of 60-100 wt.% With silicone-containing foam controllers and a holding catalyst and with N, N, N. N-tetras-hydroxypropylene ethylene diamine in the presence of water additionally injected tall oil with acid number Ј b - 180 mgKO H / g or mixture of tall oil with oligoester with mol. m, 3000-3,600 and with a hydroxyl number of 39-56 kgKOH / g and containing 10-60% by weight of statically located oxyethylene units, while the ingredients are mixed in stages: first 100 wt. polyoxyalkylene glycerin is mixed 2-bms. h. pre-prepared mixture composition, wt.h:

Organosilicon

penoregul tor0.2 - 0.43

Nitrogen-containing

catalyst 0,35 - 0,76

N, N, N, KG - tetrahydroxypropylene ethylene diamine 0,62-2,6

Tall oil0,1-2,5

or

Tall oil in combination with 0.1-0.25 oligoether 1,4-2,25

and then mixed with 3-6 wt.h. water.

The proposed method differs from that known using additional ingredients such as tall oil or tall oil in combination with an oligo ether; another sequence of introduction of ingredients, using another mixture of ingredients, previously prepared; other ratios between ingredients.

For mixing the ingredients of the hydroxyl-containing component, standard reactors are equipped with a jacket for cooling (heating and stirring device, usually with a frame stirrer with a rotational speed of 30 - 90 rpm.

consists in loading thioxy alkylene glycerol into the reactor. adding a premixed mixture to it, stirring followed by loading of water and mixing until a homogeneous final product is obtained.

A mixture of a nitrogen-containing catalyst, N, N, N, M -tetrahydroxypropylthiene-diamine, silicone foam regulator, tall oil or tall oil, and a primary opigoether containing oxyethylene units, is also prepared in a standard reactor, but earlier than the component.

5Hydroxl containing component

The invention is a liquid product with a faint ammonia smell, with a viscosity of 1000 - 1500 MPa and s (10 ° C), stable when stored for at least 6

0 month

Examples of specific performance. Table 1 shows the compositions of the preliminary mixtures. Mixture 1 corresponds to the prototype, the remaining mixtures (2-6) 5 of the invention. Table 2 shows the composition of the hydroxyl-containing component, the preparation parameters: temperature and duration of mixing, as well as the properties of the final product. All hydroxyl-containing components are obtained in a reactor with a capacity of 100 liters, equipped with an agitator frame with a rotational speed of 60 rpm.

Polyoxyalkylene-glycerin is loaded into the reactor, then silicone monitoring device (prototype example 1, see tab.2) or a pre-prepared mixture 2-6 (see examples 2-6 according to the invention), then either mixture 1 (example 1 prototype) or water (examples

0 2-6 according to the invention). The duration of mixing is monitored visually and according to the water content (K.Fisher method, GOST 24269-81) in samples taken with the mixer turned off from the upper and lower

5 parts of the contents of the reactor. The duration of the stirring is determined from the moment the ingredients are loaded until the moment when the product is homogeneous in appearance, characterized by equality

0 mass fraction of water in samples taken from the bottom and top of the reactor.

The stability of the properties of the obtained hydroxyl-containing component is controlled in appearance, as well as by

5 determine the viscosity of the upper part of the sample component. With a lack of stability of the component, its separation and a decrease in viscosity due to the sedimentation of water and high molecular weight oligoester fractions are observed.

From the data of Table 2, it can be seen that the component has an increased stability in properties, since even after the manufacturing of the component, the component does not delaminate, its viscosity changes, as well as the deterioration of the technological parameters during processing into foam plastic,

Claims (2)

1. Compositions of mixtures are based on 100 mach. polyoxyalkylene glycerol. 2. Compositions 2-6 are in accordance with the terms of the invention. a b and c a 1 table 2 The composition of the hydroxyl-containing component, the process of its preparation l properties ten 0.0032 0, 1.0 0.02 : 1100 1050 Not subject to 1030 to the test 1.0 one 1.0 0.06 0.0287 Spraying Homogeneous, no change 1060 1200 1175 1370 1350 1330 Note. Examples 2-6 correspond to the invention. 1.0 1.0 1.0 1.0 1.0 0.02 0.06 0.0287 1200 1175 1370 1350 1330 1330 yoo 1300 1290 1320