RU97119862A

RU97119862A - LIQUID, CONTAINING URETHANE ADDUCT

Info

Publication number: RU97119862A
Application number: RU97119862/04A
Authority: RU
Inventors: Дж.М.Грюнбауер Генри; Ф.Бартелинк Кэмил; Мюллер Мартин
Original assignee: Дзе Дау Кемикал Компани
Priority date: 1995-05-01
Filing date: 1996-04-19
Publication date: 1999-10-27

Claims

1. A urethane-containing composition that is liquid at room temperature, being the reaction product of monoal with an intermediate compound with terminal isocyanate groups, which, in turn, is obtained by combining a polyisocyanate with a polyal, and which, a), (b) and (c), generally accounting for 100%, includes:
(a) from 65 to 100% of the molar adduct of general structure (I):
B- (AM) _f (I)
(b) from less than 35 to 0% molar adduct of general structure (II) and
M-A-M (II)
(c) from less than 12 to 0% molar adduct (III) containing two or more B components per molecule,
M-A- (B-A) _n -B-A-M (III)
where n≥ 1,
where a is a derivative of a polyisocyanate,
B is a polyal derivative,
M is a derivative of monoal and
f is the number of reactive isocyanate groups that are on the polyale form.

2. A two-stage, solvent-free method for producing an adduct containing a multitude of urethane bonds, which is a stable liquid at room temperature and essentially does not contain isocyanate or chemically active isocyanate groups, which in the first stage involves the interaction of a polyisocyanate with a polyhloride to produce an intermediate with terminal isocyanate groups, and in the second stage - the interaction of the above intermediate with monoal, where: a) the polyisocyanate contains, at least e, two structural components of the isocyanate per molecule, with different relative chemical activity with respect to the polyal; b) a polyal is an organic compound having a molecular weight of 200 to 20,000 and containing two or more isocyanate-reactive functional groups per molecule that represent -OH, -SH, -COOH or -NHR, where R is hydrogen or alkyl; c) monoal is an organic compound containing one of the isocyanate-reactive functional groups representing —OH, —SH, —COOH or —NHR, where R is hydrogen or alkyl, characterized in that: i) in the first stage, performed essentially in anhydrous conditions and in the absence of a catalyst for activating the urethane, the polyalloy is added at a controlled rate to the polyisocyanate so that the reaction temperature does not exceed 100 ° C, and the total amount of added polyal is Anata equal to the stoichiometric equivalent or less; and ii) in the second stage, monoal is added in a limited amount sufficient to consume all isocyanate groups, by which such amount is determined by direct monitoring of the reaction mixture for the presence of isocyanate functional groups.

3. The method according to claim 2, wherein the polyisocyanate contains an aromatic diisocyanate comprising 2,4-toluene diisocyanate or 2,4'-methylene diphenyl isocyanate.

4. The method according to claim 3, wherein the polyal is a polyoxyalkylene polyol having a molecular weight of 1000-15000 and contains 2-8 hydroxyl groups per molecule and containing oxyethylene, oxypropylene-, oxybutylene bonds or a mixture of two or two in the oxyalkylene structural element more of them.

5. The method according to claim 3, in which in the first stage the total stoichiometric amount of added polyal is from 0.5: 1 to 1.0: 1 equivalent per equivalent of polyisocyanate.

6. The method according to claim 3, in which in the first stage the polyisocyanate 2,4-toluene diisocyanate or 2,4'-methylene diphenyl isocyanate interacts at 20-80 ° C with the polyal, which is a polyoxyalkylene polyol having a molecular weight of 1000-15000 and containing per molecule 2 - 8 -OH-functional groups and in which the total amount of polyol added is from 0.85: 1 to 0.95: 1 equivalent per equivalent of polyisocyanate.

7. The method according to claim 3, wherein the monoal is a polyoxyalkylene monol containing -OH compound having a molecular weight of 250-6000 and in which the oxyalkylene structural element contains oxyethylene, oxypropylene, oxybutylene or a mixture of two or more of them.

8. Intermediate compound with terminal isocyanate groups, obtained essentially under anhydrous conditions and in the absence of a urethane activating catalyst, by contact of a polyhall having a molecular weight of 200 to 20000 and containing two or more chemically active isocyanate molecules with respect to the isocyanate, representing -OH, -SH, -COOH or -NHR, where R is hydrogen or alkyl, with a polyisocyanate containing at least two isocyanate moieties / molecule, with different relative chemical activity with respect to the polyal, in which the controlled-velocity pollen is added to the polyisocyanate so that the reaction temperature does not exceed 100 ° C, and the total amount of polyal added with respect to the polyisocyanate is equal to or less stoichiometric, and the resulting intermediate in which the intermediate compound contains isocyanate in the amount of 0.5 - 5 weight. % and based on the total composition of components (a), (b) and (c), in total up to 100%, includes:
(a) 65 - 100% of the molar adduct of general structure (IV):
B (-A) _f (IV)
(b) from less than 35 to 0% molar adduct of the general structure (V), and
A (V)
(c) from less than 12 to 0% molar adduct (VI) containing two or more B components per molecule.

A- (BA) _n -B-A (VI)
where n ≥ 1,
where a is a polyisocyanate;
B is a polyal;
f is the number of reactive isocyanate groups that are formally on the polyale.

9. The composition according to claim 1 for use as a lubricant, reaction quencher, hydraulic fluid, a paint thickener, or a surfactant.