Low modulus silylated mastic composition

Patent metadata

Field	Value
Publication number	US-11104803-B2
Application number	US-201816614478-A
Country	US
Kind code	B2
Filing date	May 22, 2018
Priority date	May 23, 2017
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

The present invention concerns a composition comprising: —0.68% to 1.00% by weight of a silsesquioxane (A) comprising at least one phenyl group and at least one alkoxy group; —at least one silylated polymer comprising at least one alkoxysilane group, preferably 3% to 80% of at least one silylated polymer comprising at least one alkoxysilane group; and at least 25% by weight of at least one carbonated filler, percentages by weight being expressed with respect to the total weight of said composition, as well as the use of same as a mastic, in particular as a mastic for construction.

First claim

The invention claimed is:

1. A composition comprising:
from 0.68% to 1.00% by weight of at least one silsesquioxane (A) comprising at least one phenyl group and at least one alkoxy group;
at least one silylated polymer comprising at least one alkoxysilane group; and
at least 25% by weight of at least one carbonate filler,
the percentages by weight being expressed with respect to the total weight of said composition.

2. The composition as claimed in claim 1 , in which the silsesquioxane (A) has the following general formula (I):

wherein each of R′ 1 to R′ 8 represents, independently of one another, a group chosen from:
a hydrogen atom,
a radical selected from the group consisting of a linear or branched C 1 -C 4 alkoxy radical, a linear or branched alkyl radical comprising from 1 to 30 carbon atoms, an alkenyl radical comprising from 2 to 30 carbon atoms, an aromatic radical comprising from 6 to 30 carbon atoms, a cyclic aliphatic radical comprising from 3 to 30 carbon atoms and an acyl radical comprising from 1 to 30 carbon atoms, and
an —OSiR′ 9 R′ 10 group in which R′ 9 and R′ 10 each represents, independently of each other, a hydrogen atom or a radical selected from the group consisting of linear or branched C 1 -C 4 alkyls, linear or branched C 1 -C 4 alkoxys, C 2 -C 4 alkenyls, a phenyl, a C 3 -C 6 allyl radical, a cyclic C 3 -C 8 aliphatic radical and a C 1 -C 4 acyl radical;
provided:
that at least one radical among the R′ 1 to R′ 8 radicals is a C 1 -C 4 alkoxy radical; and
that at least one radical among the R′ 1 to R′ 8 radicals is a phenyl radical.

3. The composition as claimed in claim 1 , wherein the silsesquioxane (A) comprises from 10% to 20% by weight of alkoxy group.

4. The composition as claimed in claim 1 , wherein the silsesquioxane (A) comprises at least one methyl group.

5. The composition as claimed in claim 4 , wherein the silsesquioxane (A) comprises a phenyl group(s):methyl group(s) ratio by weight ranging from 1:10 to 10:1.

6. The composition as claimed in claim 1 , wherein the silsesquioxane (A) has a viscosity at 23° C. ranging from 10 to 200 mPa·s.

7. The composition as claimed in claim 1 , wherein the silsesquioxane (A) has a weight-average molar mass ranging from 500 g/mol to 3000 g/mol.

8. The composition as claimed in claim 1 , wherein the content of silsesquioxane (A) in said composition is selected from the group consisting of one of the following contents by weight: from 0.68% to 1.00%, from 0.69% to 1.00%, from 0.70% to 1.00%, from 0.71% to 1.00%, from 0.72% to 1.00%, from 0.73% to 1.00%, from 0.74% to 1.00%, from 0.75% to 1.00%, from 0.76% to 1.00%, from 0.77% to 1.00%, from 0.78% to 1.00%, from 0.79% to 1.00%, from 0.80% to 1.00%, from 0.81% to 1.00%, from 0.82% to 1.00%, from 0.83% to 1.00%, from 0.84% to 1.00%, from 0.85% to 1.00%, from 0.86% to 1.00%, from 0.87% to 1.00%, from 0.88% to 1.00%, from 0.89% to 1.00%, from 0.90% to 1.00%, from 0.91% to 1.00%, from 0.92% to 1.00%, from 0.93% to 1.00%, from 0.94% to 1.00%, and from 0.95% to 1.00%.

9. The composition as claimed in claim 1 , wherein the silylated polymer(s)/silsesquioxane (A) ratio by weight is between 33 and 22.

10. The composition as claimed in claim 1 , comprising from 2 to 5 parts by weight of silsesquioxane (A) per 100 parts by weight of silylated polymer(s).

11. The composition as claimed in claim 1 , in which the silylated polymer comprising at least one alkoxysilane group is selected from the group consisting of the polymers of formulae (II), (III) and (IV) as defined below, and their mixtures:

wherein:
R 1 represents a divalent hydrocarbon radical comprising from 5 to 15 carbon atoms which can be aromatic or aliphatic and linear, branched or cyclic,
R 0 represents a linear or branched divalent alkylene radical comprising from 3 to 6 carbon atoms,
R 3 represents a linear or branched divalent alkylene radical comprising from 1 to 6 carbon atoms, R 3 preferably representing methylene or n-propylene,
R 2 represents a linear or branched divalent alkylene radical comprising from 2 to 4 carbon atoms,
R 4 and R 5 , which are identical or different, each represent a linear or branched alkyl radical comprising from 1 to 4 carbon atoms,
R 6 represents a hydrogen atom, a phenyl radical or a linear, branched or cyclic alkyl radical comprising from 1 to 6 carbon atoms, a 2-succinate radical of formula:

in which R 7 is a linear or branched alkyl radical comprising from 1 to 6 carbon atoms,
n is an integer such that the number-average molecular weight of the polyether block of formula —[OR 2 ] n — ranges from 300 g/mol to 40 000 g/mol,
m 1 is zero or an integer,
n and m 1 are such that the number-average molecular weight of the polymer of formula (III) ranges from 500 g/mol to 50 000 g/mol,
m is an integer other than zero,
n and m are such that the number-average molecular weight of the polymer of formula (IV) ranges from 500 g/mol to 50 000 g/mol,
p is an integer equal to 0, 1 or 2.

12. The composition as claimed in claim 11 , comprising:
at least one polymer of formula (II) and at least one polymer of formula (III); or
at least one polymer of formula (II) and at least one polymer of formula (IV); or
at least one polymer of formula (III) and at least one polymer of formula (IV); or
at least one polymer of formula (II), at least one polymer of formula (III) and at least one polymer of formula (IV).

13. The composition as claimed in claim 11 , in which the polymer of formula (III) is such that:
m 1 is an integer equal to or different from 0,
p=0 or 1,
R 4 and R 5 each represent a methyl radical,
R 3 represents a divalent methylene or n-propylene radical,
the number-average molecular weight of said polymer ranges from 5000 to 30 000 g/mol.

14. The composition as claimed in claim 11 , in which the polymer of formula (II) is such that:
p=0 or 1,
R 0 represents a divalent n-propylene radical,
R 4 and R 5 each represent a methyl group,
the number-average molecular weight of said polymer ranges from 5000 to 30 000 g/mol.

15. The composition as claimed in claim 1 , comprising:
from 3% to 80% by weight of at least one silylated polymer comprising at least one alkoxysilane group,
from 0.1% to 1% by weight of at least one catalyst,
from 25% to 80% by weight of at least one carbonate filler,
from 0% to 30% by weight of at least one additive comprising plasticizers, solvents, pigments, adhesion promoters, desiccants, UV stabilizers, glitter, fluorescent materials, rheological additives, fillers other than carbonate fillers, or their mixtures, and
from 0.68% to 1.00% by weight of at least one silsesquioxane (A) comprising at least one phenyl group and at least one alkoxy group.

16. The composition as claimed in claim 1 , comprising:
from 15% to 80% by weight of at least one silylated polymer comprising at least one alkoxysilane group,
from 0.1% to 1% by weight of at least one catalyst,
from 25% to 55% by weight of at least one carbonate filler,
from 10% to 30% by weight of at least one plasticizer,
from 0.1% to 3% by weight of at least one desi

Assignees

• Bostik Sa

Inventors

• Sanz Federico
• Becquet Jérémy

Classifications

• C09D175/04

  Polyurethanes · CPC title

• C08K2003/265

  Calcium, strontium or barium carbonate · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08L83/06 Primary

  containing silicon bound to oxygen-containing groups (C08L83/12 takes precedence) · CPC title

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title