SU635879A3 - Method of obtaining polyurethane - Google Patents

Description

(54) METHOD OF OBTAINING POLYURETHANE The goal is achieved by using a mixture of 50-V5 by weight as a polyol component. % irost polyester with a molecular weight of 400-600 and a hydroxyl number of 350-400 and 50-5 weight. % polyether with a molecular weight of 2000-3500 and a hydroxyl number of 50-80. Polyurethanes obtained from such mixed polyols, for strengthening geological formation, loose rock and earth masses, have high flexibility with a large modulus of elasticity and high flexural strength, have good bonding strength for Coal and surrounding rock, and strong resistance to dynamic loads. It is also possible to easily keep the composition of the product constant, maintaining constant reaction conditions during its preparation. Another advantage of such a mixture of polyols is its good compatibility with water, therefore, it is impossible to isolate the component that gives flexibility when hardening wet or wet formations. The molecular weight of the polyether is 1500-8000, preferably 2000-3500, the hydrospal number is about 100, preferably 50-90. The constituents with more than one active hydrogen atom in the molecule to form suitable polyethers are primary carboxylic acids, phenols, alcohols and amines that react with an excess of 1,2-alkylene oxide. Examples of “arbcidea IKHCJIOT are phthalic, adinic, maleic, succinic acid. .npMiMeipa-MH phenol; hydroquinone, pyrocatechin, 4,4-dioxyphenyl dimethylmethane are found. Examples of alcohols are ethylene glycol, propylene glycol, trimethylol propane, glycerin, pentaerythritol, mannitol, glucose, fructose and sucrose. Examples of amines are ammonia, MO; BUT- (AND DIETHALOLAM-IL, DIET IL € NT; p | IA | MIN, aniline, diaminodiphenylmethane, especially ethylenediamine and triethanolamine. Examples of 1,2-alkylene oxides are ethylene oxide, propylene oxide and BUTYLENE OXIDE: Mixtures or one alkylene oxide can be used in the first stage of the reaction, and the other in the second stage of the reaction, in order to initiate segmentation in the synthesis of the so-called L OL1I1F1Ir simple molecule. The amount of 1,2-alkylene oxide used is determined the requirement to achieve liroksil This number is below 100. In a preferred embodiment, 5-50% by weight of such products obtained from the YAMINPK and 1 -I.PKILRNPGYYPV are used.In this case, the desired advantages compared to castor oil in terms of the mechanical properties of hardening are very obvious , loose rock and earth masses.This result is unexpected, especially in light of the generally accepted view that it is impossible to achieve time for the polyols containing amines because of their rapid reaction with isocyanates. L impregnation and penetration into thin cracks and crevices of the formation, which is a preliminary physical condition for its chemical condition: p1p0ch, neni. Polyol mixtures have the same lifespan as conventional polyols when they are biased with the isocyanate, and therefore can be used in all previously known reinforcement methods. The isocyanates used may be any known products that contain more than one isocyanate group in the molecule. Their examples are toluenetend, izociaiat, formative polymers with evocative isocyanate groups, derived from polyhydric alcohols, toluene diisocyanate, hexamethylene diisocyanate and its prepolymers, diphenylmethane diisocyanate and different forms of isomers and mixtures of different isomers, and different forms of isomers and mixtures of different isomers, isomers and mixtures of different isomers, and different forms of isomers and mixtures of different isomers, isomers, and different forms of isomers, and different forms of isomers and mixtures of different isomers, and different forms of isomers and mixtures of different isomers, and different forms of isomers and mixtures of different isomers, and of different forms of isomers, and of different forms of isomers and of different isomers and of different isomers and of isomers and of isomers and of isomers and of isomers and of isomers and of isomers. Preferred are well-known mixtures of polyisocyanates, which are obtained during the phosgenation of anilinfor (Maldehyde (KO: Ndensat. Polyols added to ethers) can be any polyols known in the production of polyurethanes. Preferred polyols are polyoxyalkanes having from 2 to 4 hydroxyl groups in a molecule, the molecular weight is from 62 to about 200, for example ethyl glycol, 1,2-propanediol, hexamethylpentol, trimethylolhoropy, glycerol or pentaerythritol and / or simple polyester polyols of pH molecules Weights from 106 to 1000, preferably 250 to 700, and most preferably 350 to 400. Any mixture of components can be used. Preferred polyols are polyether polyols that can be prepared, 1na: p1ri; measure, P1 when trimethylolpropane reacts with o, propylene monoxide (polyol 1) or omega sucrose and 1,2-propanediol with propylene oxide (polyol 6). Other specific examples of such polyether polyols are diptylene glycol, triethylene glycol, tetraethylene glycol, dipropylene glycol, tripropylene glycol, ethoxyline products nn or prooxylation of low molecular weight polyoxy compounds. The proportion of the polyol component to be mixed with the isocyanate may vary within wide limits, preferably

so that .na (Each OH group accounted for 0.5–2 NCO groups. If the reinforced geological formations, or sludge rock, or land masses contain a lot of moisture, it is desirable to use a large excess of isocyanate.

In addition, it is possible to introduce conventional compounding agents known in polyurethane chemistry to modify polyurethane, for example, castor oil, foaming agents, such as water and fluorinated hydrocarbons, accelerators, such as tertiary amines and metal catalysts (for example, chlorine tin), tin octoate or dibutyl tin dilaurate) and foam controllers such as silicon and iron oedi are not. Fillers, such as fly ash, may also be included.

In addition, it is possible to add hydrophilic substances, such as sodium aluminosilicates of the zeolite type, if it is Tgi; it is necessary for the prevention of all ". Van" hardening medium.

The examples use substances consisting of:

Polyol 1. Polyether-polyol simple, derived from three-methyl propane and propylene oxide, hydroxyl number 370, cf., molecular weight 450 and viscosity 700 pz l-rcl 26 ° C.

Castor oil. Available natural product, first-pressed category, hydro-strong number of 148 and: at a temperature of about 1000 pz or 25 ° C.

Polyol 2. A simple polyether polyol obtained from trimethylolian and oxylene oxide, a p-hydroxyl number of 56, an average molecular weight of about 3000 and a viscosity of 550 pz D | ri 25 ° C.

Polyol 3. A simple polyether polyol obtained from 1,2-propylene glycol and propylene oxide, a hydroxyl number 59, an average adolakrium of 2500 sec, and a viscosity of 410 psiri 250 ° C.

Polyol 4. Polpifer polyol simple, derived from ethylene diamine and propylene oxide, hydroxyl number 61, average molecular isec 3500 and viscosity 630 pz at 25 ° C.

Polyol 5. A simple polyester iolol, and a mixture of triethanolamine and propylene oxide, they are reacted until the hydroxyl number reaches 103, then the reaction is continued with ethylene oxide until the hydroxyl number reaches 58, the average molecular weight 3200 and VISCOSITY 480 pz at 25 ° C.

Polyol 6. A simple polyether-polyol obtained from a mixture of sucrose and 1,2-proiandiol in a molecular ratio of 1: 5 and propylene oxide, a hydroxyl number of 380, an average molecular weight of 440

P: in z.kost 580 pz at 25 ° C.

Prnmer 1. 100 parts by volume of half-floors or polyol mixtures given in table. 1, is mixed with isocyanate b: ol1L0; ntota containing 31% isocyanate, c; co, 140 pz. NpiH 25 ° C, obtained by phosgenated condensation product of aniline and formaldehyde and representing more than 50% of 4,4-diisoium diphenylmethane and 5 weight. aluminosilicate

zeolite type sodium, and cast into metal molds, treated with the release agent. After 15 (curing at room temperature, the mold is released, completing the hardened vision for 5 hours

at 80 ° C. Properties listed in Table. 1, identified for the obtained compact samples of non-speckled polyurethane.

To assess bonding properties with coal and surrounding rock, shale

and coal prisms measuring 4x4x6 cm were crushed and the reaction mixture was poured into them, maintaining a constant separation of 2 mm. The flexural strength of the cemented prisms is then determined using binder properties to measure.

Table 1

Example 2. 100 parts by volume of each mixture of polyols, are given in table. 2, but processed according to the method of Example 1. The definitions of the polyols are as given in Example 1. The measured properties of the table below. 2

Example 3. 100 parts by volume of each polyol mixture with the same definitions. dividing MILAN 1, in Example 1, Mixing s with 1.2 parts by volume of water and 0.6 parts by volume of polnloxane to stabilize the foam. The 100 parts by volume of the isocyanate described in Example 1 is then added to each mixture and the mixture is ne; 30 seconds. The development of foam in the liquid begins in each case after 4 minutes, the resulting foam cures after 15 jUUH.

Claims (2)

1. The patent of Germany No. 112984, cl. 84 with 3/14, publ. 1962. 2. The patent of Germany LL 1784458, cl. 84 from 5/54, onlib. 1973.