# US 5,346,968 A · Oligosiloxanes and reinforced thermoplastic and ceramic materials obtainable therewith

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- Number: US 5,346,968 A
- Document ID: US5346968A
- Status: Granted
- Kind: A
- Application number: 08/159,707
- Filed: 1993-12-01
- Granted: 1994-09-13
- Earliest claimed: 1990-04-21
- Assignees: BASF SE
- Inventors: Karl-Heinz Haas
- Web page: https://patentgrep.com/patent/US5346968A

## CPC

- C08G 77/18: to alkoxy or aryloxy groups
- C04B 35/117: Composites
- C04B 35/6224: {Fibres based on silica}
- C04B 35/632: Organic additives
- C04B 35/63408: {Polyalkenes}
- C04B 35/80: Fibres, filaments, whiskers, platelets, or the like
- C07F 7/04: Esters of silicic acids
- C07F 7/0838: {Compounds with one or more Si-O-Si sequences (compounds with a ring containing only alternating Si and O atoms, i.e. cyclosilanes C07F7/21)}
- C08G 77/045: {containing less than 25 silicon atoms}
- C08L 101/00: Compositions of unspecified macromolecular compounds
- C04B 2235/483: Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes
- C04B 2235/5232: Silica or silicates other than aluminosilicates, e.g. quartz
- C04B 2235/6022: Injection moulding
- Y10S 525/906: Polysulfone
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

Oligosiloxanes of the formula I ##STR1## where R.sup.1 is a C.sub.1 -C.sub.4 -alkyl and n is from 2 to 50, are chiefly used for fabricating fiber-reinforced composite and ceramic materials.

## Claims

### Claim 1

A thermoplastic composition which comprises: an oligosiloxane of the formula ##STR4## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl and n is from 2 to 50, and a polymer selected from the group consisting of polyamides, polyphenylene sulfones, polyphenylene ether sulfones, aromatic polyether imides, polyamide imides and aromatic polyether ketones.

### Claim 2 (depends on 1)

The thermoplastic composition of claim 1, wherein R.sup.1 is ethyl and n is 2 to 10.

### Claim 3

A thermoplastic composition obtained by polymerizing an oligosiloxane of the formula ##STR5## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl and n is from 2 to 50 in the presence of a thermoplastic material and thereafter adding to the composition an adhesion promoter selected from the group consisting of methyltriethoxysilane, propyltriethoxysilane, phenyltriethoxysilane, .gamma.-aminopropyltrimethoxysilane, .gamma.-aminopropyltriethoxysilane, .gamma.-cyanopropyltriethoxysilane and N,N-dimethylaminopropyltriethoxysilane.

### Claim 4 (depends on 3)

The thermoplastic composition of claim 3, wherein R.sup.1 is ethyl and n is 2 to 10.

### Claim 5

A thermoplastic composition obtained by (a) reacting an oligomeric silicate ester of the formula II ##STR6## where R.sup.1 is an alkyl of 1-4 carbons and n from 2 to 50, with an adhesion promoter selected from the group consisting of methyltriethoxysilane, ethyltriethoxysilane, propyltrithoxysilane, phenyltriethoxysilane, .gamma.-aminopropyltrimethoxysilane, .gamma.-aminopropyltriethoxysilane, .gamma.-cyanopropyltriethoxysilane and N,N-dimethylaminopropyltriethoxysilane and thereafter reacting the product of step (a) with acetic anhydride in the presence of a catalyst selected from the group consisting of mineral acids, titanium alkoxides, aluminum alkoxides and silicon alkoxides to from reaction product (b) and subsequently polymerizing reaction product (b) in the presence of thermoplastic materials.

### Claim 6 (depends on 5)

The thermoplastic composition of claim 5, wherein R.sup.1 is ethyl and n is 2 to 10.

### Claim 7 (depends on 5)

The composition of claim 5, wherein the adhesion promoter is selected from the group consisting of .gamma.-aminopropyltrimethoxysilane, .gamma.-aminopropyltriethoxysilane, N,N-dimethylaminopropyltriethoxysilane and .gamma.-cyanopropyltriethoxysilane.

### Claim 8

A process for preparing oligosiloxanes of the formula I ##STR7## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl and n is from 2 to 50, which comprises: reacting a corresponding oligomeric silicate ester of the formula II ##STR8## with acetic anhydride in the presence of a catalyst selected from the group consisting of mineral acids, titanium alkoxides, aluminum alkoxides and silicon tetrachloride.

### Claim 9 (depends on 8)

The process of claim 8, wherein acetic anhydride is used in a molar excess of up to 5 moles per mole of silicate ester II.

### Claim 10 (depends on 8)

The process of claim 8, wherein an amount of from 2.5 to 3 moles of acetic anhydride is used per mole of silicate ester II.

### Claim 11 (depends on 8)

The process of claim 8, wherein the catalyst is perchloric acid.

### Claim 12 (depends on 8)

The process of claim 8, wherein the catalyst is a titanium alkoxide, an aluminum alkoxide, or silicon tetrachloride.