# US 10,246,546 B2 · Polymer containing silane groups

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- Number: US 10,246,546 B2
- Document ID: US10246546B2
- Status: Granted
- Kind: B2
- Application number: 15/522,004
- Filed: 2015-11-23
- Published: 2017-11-09
- Granted: 2019-04-02
- Earliest claimed: 2014-11-24
- Assignees: Sika Technology AG
- Applicants: Sika Technology AG
- Inventors: Andreas Kramer; Urs Burckhardt
- Web page: https://patentgrep.com/patent/US10246546B2

## CPC

- C08G 18/289: {containing silicon}
- C07F 7/1804: {Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896)}
- C08G 18/10: Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G 18/341: {Dicarboxylic acids, esters of polycarboxylic acids containing two carboxylic acid groups}
- C08G 18/4825: {Polyethers containing two hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/4866: {having a low unsaturation value}
- C08G 18/6692: {with compounds of group C08G18/34}
- C08G 18/755: {and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

A polymer containing silane groups, a method for synthesizing same, and curable compositions including the polymer. The polymer containing silane groups has a very long shelf life and cures quickly with moisture. The polymer is suitable as an elastic adhesive or sealant or coating that can be applied at room temperature and has good heat resistance, or as a hot melt adhesive.

## Claims

### Claim 1

A polymer having end groups of the formula (I)
where
either R′ is a radical of the formula (II) and R″ is a hydrogen radical
or R′ is a hydrogen radical and R″ is a radical of the formula (II);
R1 is a hydrocarbyl radical which has 1 to 18 carbon atoms and optionally has heteroatoms in the form of ether oxygen, ester oxygen, thioether sulfur or tertiary amine nitrogen;
R2 is a linear or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, optionally having aromatic components, and optionally having one or more heteroatoms;
R3 is an alkyl radical having 1 to 8 carbon atoms;
R4 is an aliphatic or cycloaliphatic or arylaliphatic hydrocarbyl radical which has 1 to 12 carbon atoms and optionally has one or two ether oxygens;
X is O or S; and
n is 0 or 1 or 2.

### Claim 2 (depends on 1)

A polymer as claimed in claim 1, characterized in wherein R1 is an aliphatic or cycloaliphatic or arylaliphatic hydrocarbyl radical which has 1 to 12 carbon atoms and optionally has one or two ether oxygens.

### Claim 3 (depends on 1)

A polymer as claimed in claim 1, wherein R4 is a methyl radical or an ethyl radical.

### Claim 4 (depends on 1)

A polymer as claimed in claim 1, wherein X is O.

### Claim 5 (depends on 1)

A polymer as claimed in claim 1, wherein X is O and R1 and R4 are each a methyl radical or are each an ethyl radical.

### Claim 6 (depends on 1)

A polymer as claimed in claim 1, wherein n is 0.

### Claim 7 (depends on 1)

A polymer as claimed in claim 1, wherein it has an average functionality in the range from 1.3 to 4 in relation to end groups of the formula (I).

### Claim 8 (depends on 1)

A polymer as claimed in claim 1, wherein it has an average molecular weight in the range from 1′000 to 30′000 g/mol.

### Claim 9 (depends on 1)

A polymer as claimed in claim 1, wherein it is a polyether containing silane groups which is liquid at room temperature.

### Claim 10 (depends on 1)

A polymer as claimed in claim 1, wherein it is a polyester which is solid at room temperature and/or a polycarbonate which is solid at room temperature.

### Claim 11 (depends on 1)

A process for preparing a polymer as claimed in claim 1, wherein at least one hydroxysilane of the formula (III)
is reacted with at least one polyurethane polymer containing isocyanate groups.

### Claim 12 (depends on 1)

A curable composition comprising at least one polymer as claimed in claim 1.

### Claim 13 (depends on 12)

The curable composition as claimed in claim 12, wherein it is applicable at room temperature and is an elastic adhesive or sealant or an elastic coating.

### Claim 14 (depends on 12)

The curable composition as claimed in claim 12, wherein it is solid at room temperature and is a hotmelt adhesive.

### Claim 15

A hydroxysilane of the formula (VII)
where
either R5 is a radical of the formula (VIII) and R6 is a hydrogen radical
or R5 is a hydrogen radical and R6 is a radical of the formula (VIII);
—(CH2)2Si(OR8)3 (VIII)
and R7 and R8 are either each a methyl radical or each an ethyl radical.