Polysiloxane-based protective coating composition for hard surfaces

Patent metadata

Field	Value
Publication number	US-12091573-B2
Application number	US-201915733678-A
Country	US
Kind code	B2
Filing date	May 31, 2019
Priority date	Jun 8, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

The present disclosure relates to a protective coating composition for a hard surface, wherein the composition comprises an organic solvent and a polysiloxane having the general formula (I), wherein: R1, R2, R3, R4, R5, R6, R7 and R8 are independently an alkyl group having from 1 to 8 carbon atoms; Y and Z are independently a divalent linking group selected from the group consisting of urea, urethane, oxygen atom, sulfur atom and alkylene having from 1 to 8 carbon atoms; A, B, L and M are independently a divalent slinking group selected from the group consisting of alkylene having from 1 to 8 carbon atoms, with the proviso that if the combined linking groups formed by -A-Y-L- and -M-Z—B— are independently an alkylene, then the alkylene is independently different from ethylene; n is an integer from 5 to 1500; and m and p are independently an integer from 1 to 3. In another aspect, the present disclosure is directed to a method of reducing contamination from a hard surface.

First claim

The invention claimed is:

1. A protective coating composition for a hard surface, wherein the protective coating composition comprises
an organic solvent in an amount greater than 50 weight percent based on a total weight of the protective coating composition; and
a polysiloxane having the general formula (I):
(R 8 ) 3-p (R 7 O) p Si-M-Z—B—Si(R 3 )(R 4 )—[—O—Si(R 1 )(R 2 )—] n -A-Y-L-Si(OR 5 ) m (R 6 ) 3-m   (I)

wherein:
R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently an alkyl group having from 1 to 8 carbon atoms;
Y and Z are independently a divalent linking group selected from the group consisting of urea, urethane, oxygen atom, sulfur atom and alkylene having from 1 to 8 carbon atoms;
A, B, L and M are independently a divalent linking group selected from the group consisting of alkylene having from 1 to 8 carbon atoms, with the proviso that if the combined linking groups formed by -A-Y-L-and-M-Z—B— are independently an alkylene, then the alkylene is independently different from ethylene;
n is an integer from 5 to 1500; and
m and p are independently an integer from 1 to 3.

2. The protective coating composition of claim 1 , wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are independently an alkyl group having from 1 to 6 carbon atoms.

3. The protective coating composition of claim 1 , wherein Y and Z are independently a divalent linking group selected from the group consisting of urea, urethane, and sulfur atom.

4. The protective coating composition of claim 1 , wherein the polysiloxane has one of the following formula:

5. The protective coating composition of claim 1 , wherein the polysiloxane has a number average molecular weight in the range from 500 to 200,000 Daltons.

6. The protective coating composition of claim 1 , wherein the polysiloxane has a number average molecular weight greater than 1000 Daltons.

7. The protective coating composition of claim 1 , which further comprises an amino-functional silane.

8. The protective coating composition of claim 7 , wherein the amino-functional silane has the following general formula (II):
(R 11 ) 2 N—R 9 —[Si(W) q (R 10 ) 3-q ] r   (II)

wherein:
R 9 is a multivalent alkylene group optionally interrupted by one or more —O— groups or up to three —NR 3 — groups;
R 10 is alkyl or arylalkylenyl;
each R 11 is independently hydrogen, alkyl, arylalkylenyl, or —R 9 —[Si(W) q (R 10 ) 3-q ];
W is alkoxy, acyloxy, aryloxy, polyalkyleneoxy, halogen, or hydroxyl;
q is 1, 2 or 3;
r is 1, 2 or 3;
with the provisos that at least two independently selected Si(W) q (R 10 ) 3-q groups are present and that both R 11 groups are not hydrogen.

9. The protective coating composition of claim 7 , wherein the amino-functional silane is selected from the group consisting of bis(3-trimethoxysilyl propyl)amine, bis(3-triethoxysilyl propyl)amine, N-methyl-bis(3-trimethoxysilylpropyl)amine, N-methyl-bis(3-triethoxysilylpropyl)amine, N,N′-methyl-bis[3-trimethoxysilylpropyl]-ethylenediamine, N,N′-methyl-bis[3-triethoxysilylpropyl]-ethylenediamine, and any mixtures thereof.

10. The protective coating composition of claim 7 comprising an amino-functional silane in an amount ranging from 0.01 to 15 wt %, based on the weight of the protective coating composition.

11. The protective coating composition of claim 1 comprising:
a) from 0.01 to 15 wt % of the polysiloxane;
b) optionally, from 0.01 to 15 wt % of an amino-functional silane; and
c) from 50 to 99 wt % of an organic solvent;
based on the weight of the protective coating composition.

12. The protective coating composition of claim 1 , wherein the hard surface comprises a material selected from the group consisting of siliceous substrates, glass surfaces, plastic surfaces, thermoset polymeric surfaces, thermoplastic polymeric surfaces, organic polymeric substrates, metal-coated polymeric surfaces, ceramic surfaces, cement surfaces, stone surfaces, painted or clearcoat surfaces, metal surfaces, wood, wood laminate, polyurethane-coated wood, and any combinations thereof.

13. A method of reducing contamination from a hard surface, which comprises the steps of:
a) providing a hard surface;
b) applying a protective coating composition of claim 1 to the hard surface thereby forming a layer of the protective coating composition adjacent to the hard surface; and
c) drying and/or curing the layer of the protective coating composition thereby forming a protective coating layer adjacent to the hard surface.

14. A coated article comprising a substrate having a hard surface and a coating layer adjacent to at least part of the hard surface, wherein the coating layer comprises a layer of the protective coating composition of claim 1 that has been dried and/or cured onto the hard surface.

Assignees

• 3M Innovative Properties Company

Inventors

• Audenaert Frans A
• Schuell Christoph T R
• Kühneweg Bernd
• Lens Hugo R
• Jinks Philip A
• Fan Wayne W
• Nuyts Inge

Classifications

• C08K5/544

  containing nitrogen · CPC title

• C08G77/392

  containing sulfur · CPC title

• C08G77/388

  containing nitrogen · CPC title

• C09D7/63

  organic · CPC title

• C09D7/20

  Diluents or solvents · CPC title