Solvent-free polyurethane liquid membrane

Patent metadata

Field	Value
Publication number	US-10442956-B2
Application number	US-201615262931-A
Country	US
Kind code	B2
Filing date	Sep 12, 2016
Priority date	Mar 11, 2014
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

The present disclosure relates to a two-component composition containing a polymer polyol, a dial chain extender, an aldimine of formula (I), optionally additional polyols and diphenylmethandiisocyanates in the two components. The composition is particularly suitable as a manually applicable solvent-free liquid film for coating and/or sealing floors and roofs. It also has a long open time, cures quickly and without complications in a wide temperature and humidity range, has a high level of strength and is weather resistant.

First claim

What is claimed is:

1. A composition composed of:
a first component comprising:
at least one polymer polyol which is a dispersion of a polymer that is solid at room temperature in a polyether polyol that is liquid at room temperature,
at least one diol chain extender
and optionally other polyols; and

a second component comprising:
monomeric diphenylmethane diisocyanate;

where at least one of the first component and the second component additionally comprises at least one aldimine of the formula (I),

where
A is an (m+n)-valent hydrocarbon moiety which optionally comprises ether units and which has from 2 to 20 C atoms,
X is O or N—R 5 ,
R 1 and R 2 are mutually independently respectively a monovalent hydrocarbon moiety having from 1 to 12 C atoms, or together are a divalent hydrocarbon moiety which has from 4 to 12 C atoms and which is part of an optionally substituted carbocyclic ring having from 5 to 8;
R 3 is a hydrogen atom or is an alkyl or arylalkyl or alkoxycarbonyl moiety having from 1 to 12 C atoms;
R 4 is a monovalent hydrocarbon moiety which has from 6 to 20 C atoms and which optionally comprises ether units or aldehyde units;
R 5 is a monovalent hydrocarbon moiety which has from 1 to 30 C atoms and which optionally comprises at least one carboxylic ester group, nitrile group, nitro group, phosphonic ester group, sulfonic group or sulfonic ester group, or a group of the formula

and
m is 0 or 1, and n is 1 or 2 or 3, with the proviso that m+n is 2 or 3.

2. The composition as claimed in claim 1 , wherein the aldimine of the formula (I) is selected from the group consisting of:
N,N′-bis(2,2-dimethyl-3-lauroyloxypropylidene)hexamethylene-1,6-diamine, N,N′-bis(2,2-dimethyl-3-lauroyloxypropylidene)-3-aminomethyl-3,5,5-trimethylcyclohexylamine, N-2,2-dimethyl-3-lauroyloxypropylidene-2-(2-aminoethoxy)ethanol, N,N′-bis(2,2-dimethyl-3-lauroyloxypropylidene)polyoxypropylenediamine with average molecular weight in a range from 710 to 810 g/mol and N,N′,N″-tris(2,2-dimethyl-3-lauroyloxypropylidene)polyoxypropylenetriamine with average molecular weight in a range from 1190 to 1290 g/mol.

3. The composition as claimed in claim 1 , wherein the solid polymer is a copolymer of acrylonitrile and styrene (SAN) or is a polyurea/polyhydrazodicarbonamide (PHD) or is a polyurethane.

4. The composition as claimed in claim 1 , wherein the polyether polyol is an ethylene-oxide-terminated polyoxypropylenetriol with molecular weight in a range from 1000 to 6000 g/mol.

5. The composition as claimed in claim 1 , wherein the diol chain extender is selected from the group consisting of:
1,2-ethanediol, 1,2-propanediol, 1,3-propanediol, 1,2-butanediol, 1,3-butanediol, 1,4-butanediol, 2,3-butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, 1,2-pentanediol, 2,4-pentanediol, 2-methyl-1,4-pentanediol, 2,2-dimethyl-1,3-propanediol, 1,6-hexanediol, 1,2-hexanediol, 3-methyl-1,5-pentanediol, 1,8-octanediol, 1,2-octanediol, 3,6-octanediol, 2-ethyl-1,3-hexanediol, 2,2,4-trimethyl-1,3-pentanediol, 2-butyl-2-ethyl-1,3-propanediol, 2,7-dimethyl-3,6-octanediol, 1,4-cyclohexanediol, 1,3-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, diethylene glycol and dipropylene glycol.

6. The composition as claimed in claim 1 , wherein the composition comprises:
at least one other polyol which is a polyether polyol or a poly(meth)acrylate polyol or which is a polyhydroxyfunctional fat or oil.

7. The composition as claimed in claim 1 , wherein a proportion of solid polymer from the polymer polyol, based on a entirety of polymer polyol and optionally present other polyols, is in a range from 5 to 30% by weight.

8. The composition as claimed claim 1 , wherein a content of the monomeric diphenylmethane diisocyanate in the second component is in a range from 20 to 100% by weight.

9. The composition as claimed in claim 1 , wherein at least one of the first component and the second component additionally comprises:
a zirconium(IV) compound as catalyst.

10. The composition as claimed in claim 1 , wherein the composition is substantially free from volatile solvents.

11. The composition as claimed in claim 1 , wherein the composition viscosity one minute after mixing of the first component and the second component is in a range from 0.5 to 2 Pa·s at 25° C.

12. The composition as claimed in claim 1 , wherein the first and second components are mixed to form a coating or seal.

13. The composition claimed in claim 1 , in combination with a floor-coating system comprising:
optionally a primer and/or a priming coat, and/or a repair composition or leveling composition;
at least one layer of the composition, onto which a defined quantity of, or an excess of, quartz sand or other aggregates can have been scattered;
optionally a topcoat, onto which a defined quantity of, or an excess of, quartz sand or other aggregates can have been scattered; and
a sealing system.

14. The composition as claimed in claim 1 , in combination with a roof-sealing system comprising:
optionally a primer and/or a priming coat, and/or a repair composition or leveling composition;
at least one layer of thickness from 0.5 to 5 mm of the composition;
optionally a topcoat; and
optionally a sealing system.

15. A composition as claimed in claim 1 , which has been hardened after mixing of the first and second components.

16. A composition as claimed in claim 1 :
the first component comprising:
at least one polymer polyol which is a dispersion of a polymer that is solid at room temperature in a polyether polyol that is liquid at room temperature,
at least one diol chain extender; and
other polyols; and

the second component comprising:
monomeric diphenylmethane diisocyanate;

where at least one of the first component and the second component additionally comprises at least one aldimine of the formula (I),

where
A is an (m+n)-valent hydrocarbon moiety which comprises ether units and which has from 2 to 20 C atoms,
X is O or N—R 5 ,
R 1 and R 2 are mutually independently respectively a monovalent hydrocarbon moiety having from 1 to 12 C atoms, or together are a divalent hydrocarbon moiety which has from 4 to 12 C atoms and which is part of an substituted carbocyclic ring having 6 C atoms;
R 3 is a hydrogen atom or is an alkyl or arylalkyl or alkoxycarbonyl moiety having from 1 to 12 C atoms;
R 4 is a monovalent hydrocarbon moiety which has from 6 to 20 C atoms and which comprises ether units or aldehyde units;
R 5 is a monovalent hydrocarbon moiety which has from 1 to 30 C atoms and which comprises at least one carboxylic ester group, nitrile group, nitro group, phosphonic ester group, sulfonic group or sulfonic ester group, or a group of the formula;

and
m is 0 or 1, and n is 1 or 2 or 3, with the proviso that m+n is 2 or 3.

17. The composition as claimed in claim 2 , wherein the solid polymer is a copolymer of acrylonitrile and styrene (SAN) or is a polyurea/polyhydrazodicarbonamide (PHD) or is a polyurethane.

18. The composition as claimed in

Assignees

• Sika Tech Ag

Inventors

• Häberle Hans
• Burckhardt Urs
• Stadelmann Ursula

Classifications

• C08G18/222

  metal compounds not provided for in groups C08G18/225 - C08G18/26 · CPC title

• C08G18/3206

  aliphatic · CPC title

• C08G18/4072

  Mixtures of compounds of group C08G18/63 with other macromolecular compounds · CPC title

• C08G18/3256

  Reaction products of polyamines with aldehydes or ketones · CPC title

• C08G18/0876

  the dispersing or dispersed phase being a polyol · CPC title