# US 2004/0073031 A1 · Method for the production of hydroxyalkyl polysiloxanes

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- Number: US 2004/0073031 A1
- Document ID: US20040073031A1
- Status: Published application
- Kind: A1
- Application number: 10/469,663
- Filed: 2003-09-02
- Published: 2004-04-15
- Earliest claimed: 2001-03-01
- Assignees: Consortium fur Elektrochemische Industrie GmbH
- Inventors: Oliver Schäfer; Thomas Kammel; Bernd Pachaly
- Web page: https://patentgrep.com/patent/US20040073031A1

## CPC

- C08G 77/44: containing only polysiloxane sequences
- C08G 77/16: to hydroxy groups
- C08G 77/50: by carbon linkages
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

The invention relates to a method for the production of hydroxyalkyl polysiloxanes of general formula (V) (SiO4/2)k(R12SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2SiR3213 (CR42)b—OH]s[O1/2H]t (V), wherein organosiloxanes of general formula (VI) (SiO4/2)k(R1SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2H]r(VI) containing silanol are made to react with compounds having at least one unit of general formula (IV) [O—(CR42)—SiR32]n— (IV).

## Claims

### Claim 1

A process for preparing hydroxyalkylpolysiloxanes of the formula V
(SiO4/2)k(R1SiO3/2)m(R12SiO2/2)p(R13Si1/2)q([O1/2SiR32—(CR42)b—OH]s[O1/2H]t (V),
in which silanol-containing organosiloxanes of the formula VI
(SiO4/2)k(R1SiO3/2)m(R12SiO2/2)p(R13SiO1/2)q[O1/2H]r (VI)
are reacted with compounds comprising at least one unit of the formula IV
—[O—(CR42)b—SiR32)n— (IV)
where
R1, R3, R4 are each a hydrogen atom or a monovalent C1-C20-hydrocarbon radical or C1-C,5-hydrocarbonoxy radical which may be unsubstituted or substituted by —CN, —NCO, —NRx2, —COOH, —COORx, halogen, acryl, epoxy, —SH, —OH or —CONRx2, in which one or more nonadjacent methylene units may be replaced by —O—, —CO—, —COO—, —OCO—, or —OCOO—, —S— or —NRx— groups and in which one or more nonadjacent methine units may be replaced by —N═, —N═N— or —P═ groups,
Rx is hydrogen or a C1-C10-hydrocarbon radical which may be unsubstituted or substituted by —CN or halogen,
b is at least 2,
s is at least 1,
r is at least 1,
n is at least 2,
s+t=r and k+m+p+q is at least 2.

### Claim 2 (depends on 1)

The process as claimed in claim 1, in which R1 is methyl, ethyl, phenyl, vinyl or trifluoropropyl.

### Claim 3 (depends on 1, 2)

The process as claimed in claim 1 or 2, in which R4 is hydrogen.

### Claim 4 (depends on 1, 2, 3)

The process as claimed in any of claims 1 to 3, in which R3 is a methyl radical.

### Claim 5 (depends on 1, 2, 3, 4)

The process as claimed in any of claims 1 to 4, in which a linear organosiloxane of the formula VI in which k and m are each 0, p is greater or equal to 1, q is 0 or 1 and r is 1 or 2 is used.

### Claim 6 (depends on 1, 2, 3, 4)

The process as claimed in any of claims 1 to 4, in which resins in which 5%<k+m<90%, based on the sum of k, m, p, q, s and t, are prepared.

### Claim 7 (depends on 1, 2, 3, 4, 5, 6)

The process as claimed in any of claims 1 to 6, in which the reaction temperature is from 0° C. to 160° C.

### Claim 8 (depends on 1, 2, 3, 4, 5, 6, 7)

The process as claimed in any of claims 1 to 7, in which a catalyst which is an inorganic or organic Lewis acid or Lewis base is used.

### Claim 9 (depends on 8)

The process as claimed in claim 8, in which the catalyst is selected from among carboxylic acids, partly esterified carboxylic acids, unesterified and partly esterified monophosphoric, oligophosphoric and polyphosphoric acids, alkylammonium hydroxides, ammonium alkoxides, alkylammonium fluorides and amine bases.