# US 8,785,537 B2 · Glue for repair or attachment free of organotin

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- Number: US 8,785,537 B2
- Document ID: US8785537B2
- Status: Granted
- Kind: B2
- Application number: 13/384,784
- Filed: 2010-07-09
- Published: 2012-06-28
- Granted: 2014-07-22
- Earliest claimed: 2009-07-20
- Assignees: Bostik SA
- Applicants: Jacqueline Carrard; Virginie Cagan
- Inventors: Jacqueline Carrard; Virginie Cagan
- Web page: https://patentgrep.com/patent/US8785537B2

## CPC

- C08G 18/48: Polyethers
- C08G 18/718: {containing silicon}
- C08G 65/336: containing silicon
- C09J 171/02: Polyalkylene oxides
- C09J 175/04: Polyurethanes
- C09J 201/10: containing hydrolysable silane groups
- C08G 2190/00: Compositions for sealing or packing joints
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)

## Abstract

The invention relates to an adhesive composition, including: 10 to 95% of a moisture cross-linkable polymer (A), the main chain includes 2 silyl terminal groupings, each of which includes at least one hydrolyzable group bonded to the silicon atom; 1 to 60% of a mineral filler (B) in the form of particles having a size of between 1 nm and 0.2 mm; and 0.2 to 7% of a crosslinking catalyst (C) consisting of titanium tetraisopropoxide. The invention also relates to the use of said composition as glue for repair or attachment.

## Claims

### Claim 1

An adhesive composition comprising:
from 10% to 95% of a moisture-crosslinkable polymer (A) with a main chain comprising 2 terminal silyl groups each comprising at least one hydrolyzable group bonded to the silicon atom;
from 1% to 60% of a mineral filler (B) in the form of particles with a size of between 1 nm and 0.2 mm; and
from 0.2% to 7% of a crosslinking catalyst (C) composed of titanium tetraisopropoxide.

### Claim 2 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the main chain of the polymer (A) is:
(A1) polyoxyalkylenes;
(A2) polyurethanes or polyureas obtained by condensing a polyol or a polyamine with polyisocyanates;
(A3) homopolymers and copolymers obtained from:
at least one alkyl(meth)acrylate monomer comprising an alkyl radical having a number of carbon atoms of between 1 and 15, and optionally
other monomers, it being possible for these other monomers to be used in amounts of up to 50% by weight relative to the entirety of the monomers.

### Claim 3 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the silyl group is an alkoxysilane having the formula:
—Si(R1)p(OR2)3-p (I)
in which:
R1 and R2, which are identical or different, each represent a linear or branched alkyl radical of 1 to 4 carbon atoms, with the possibility, when there are two or more radicals R1 or R2, for them to be identical or different;
p is an integer equal to 0, 1 or 2.

### Claim 4 (depends on 3)

The adhesive composition as claimed in claim 3, wherein when the main chain of the polymer (A) is (A1), the alkoxysilane radical is joined to said chain directly by its available bond or indirectly via a urethane function and a group comprising an alkylene radical of formula:
—CH2—
or
—CH2—CH2—CH2—.

### Claim 5 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the alkoxysilane radical is of the following formulae:
—Si(OCH3)3, —Si(CH3)(OCH3)2, —Si(OCH2CH3)3 or —Si(CH3)(OCH2CH3)2.

### Claim 6 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the main chain of the polymer (A) is (A1).

### Claim 7 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the main chain of the polymer (A) is (A2).

### Claim 8 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the mineral filler is calcium carbonate or a fumed silica.

### Claim 9 (depends on 1)

The adhesive composition as claimed in claim 1, comprising from 15% to 80% of the polymer (A), from 2% to 55% of mineral filler, and from 0.5% to 5% of titanium tetraisopropoxide (C).

### Claim 10 (depends on 1)

A glue comprising the adhesive composition as defined in claim 1 and conventional additives.

### Claim 11 (depends on 1)

The adhesive composition as claimed in claim 1, wherein the mineral filler particles have a size of 10 nm to 0.01 mm.

### Claim 12 (depends on 2)

The adhesive composition as claimed in claim 2, wherein (A2) is a polyether or polyester polyol.

### Claim 13 (depends on 2)

The adhesive composition as claimed in claim 2, wherein alkyl radical in (A3) has 1-10 carbon atoms.

### Claim 14 (depends on 2)

The adhesive composition as claimed in claim 2, wherein the other monomers are styrenes, vinyl ethers, (meth) acrylic acids or polyunsaturated monomers.