US5494949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface-modified oxide particles and their use as fillers and modifying agents in polymer materials
Assignee: Hoechst AG
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Filing: 1993-09-23
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Granted: 1996-02-27
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Expires: 2013-09-23
Abstract
Abstract The invention relates to oxide particles which have a surface modification by covalently bonded organic groups which allow covalent bonding into polymer materials. These particles are particularly advantageous in their use as fillers or modifying agents in polymer materials, in particular polymer films.
Inventors
- 👤 Joachim Kinkel
- 👤 Kurt Marquard
- 👤 Ludwig Pohl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:50
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; B; B82; B82Y; B82Y30/00; C08K; C08K9/00; C08K9/04; C08K9/06; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084; C09C1/28; C09C1/30; C09C1/3081; C09C1/36; C09C1/3607; C09C1/3684; C09C3/00; C09C3/12; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/51; C01P2004/52; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/90; C08J2367/00; C08J2367/02; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
Oxide particles which have a surface modification by covalently bonded organic groups, obtained by treating spherical, non-porous oxidic primary particles obtained by hydrolytic polycondensation of alcoholate compounds with a silanizing agent of the formula I [R.sup.1 R.sup.2 R.sup.3 ]Si--(CH.sub.2).sub.1 --X--R.sup.4(I) wherein R 1 is C1 or alkoxy having 1-6 C atoms, R 2 and R 3 are alkyl having 1-6 C atoms or have the meaning of R 1 , 1is a number from 1 to 6, X is a single bond, O, NH, or CONH NHCONH, R 4 is ##STR4## where Y=CH, ##STR5## 2 Z =OR or two radicals Z together are --O--or >NR and m and n are numbers from 0 to 6.
Claim 2
Dependent Claim
115 words
Oxide particles which have a surface modification by covalently bonded organic groups, obtained by treating spherical, non-porous oxidic primary particles obtained by hydrolytic polycondensation of alcoholate compounds with a silanizing agent of the formula I [R.sup.1 R.sup.2 R.sup.3 ]Si--(CH.sub.2).sub.1 --X--R.sup.4(I) wherein R 1 is C1 or alkoxy having 1-6 C atoms, R 2 and R 3 are alkyl having 1-6 C atoms or have the meaning of R 1 , 1is a number from 1 to 6, X is a single bond, O, NH, or CONH NHCONH, R 4 is ##STR4## where Y=CH, ##STR5## 2 Z =OR or two radicals Z together are --O--or >NR and m and n are numbers from 0 to 6.
Claim 3
Dependent Claim
39 words
Oxide particles according to claim 1, obtained from primary particles based on SiO 2 , TiO 2 , ZrO 2 , Al 2 O 3 , V 2 O 5 , Nb 2 O 5 or mixed systems thereof.
Claim 4
Dependent Claim
20 words
Oxide particles according to claim 1, obtained from oxidic primary particles having particle diameters of 10 nm to 20 μm.
Claim 5
Dependent Claim
28 words
Process for the preparation of particles according to claim 1 comprising reacting an aqueous-alcoholic suspension of the oxidic primary particles with a silanizing agent of the formula I.
Claim 6
Dependent Claim
32 words
Process according to claim 4, wherein the oxidic primary particles are spherical, non-porous primary particles in a highly monodisperse form which are obtained by hydrolytic polycondensation of alcoholate compounds of corresponding elements.
Claim 7
Dependent Claim
20 words
Process according to claim 4 wherein the oxidic primary particles have a particle diameters of 10 nm to 20 μm.
Claim 8
Dependent Claim
12 words
A material comprising a polymer and oxide particles according to claim 1.
Claim 9
Dependent Claim
11 words
The material of claim 7, wherein the polymer is a polyester.
Claim 10
Dependent Claim
24 words
Oxide particles according to claim 1, wherein at least one of R 2 and R B is chlorine or alkoxy of 1-6 C atoms.
Claim 11
Dependent Claim
26 words
Oxide particles according to claim 1, wherein the silanizing agent of formula I is: diethyl triethoxysilylpropylmalonate (ethoxydimethylsilylpropyl)succinic anhydride diethyl (triethoxysilylmethyl)succinate 4-(methyldiethoxysilyl)butanoic acid (terephthalic acid dimethylester) amide.
Claim 12
Dependent Claim
24 words
The material of claim 7, wherein the optical refractive index of the oxide particles is adapted to the optical refractive index of the polymer.
Claim 13
Dependent Claim
15 words
The material of claim 7, wherein the oxide particles are covalently bonded to the polymer.
Claim 14
Dependent Claim
27 words
The oxide particles of claim 1, wherein in the silanizing agent, Y is not CH when m +n =1 and the two radicals Z together are --O--.
Claim 15
Dependent Claim
14 words
Oxide particles according to claim 1, wherein, in the silanizing agent, Y is CH.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1999-02-26 | 1999-08-28 | 2000-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-26 | 2003-08-28 | 2004-02-27 | $3760.00 | Window Closed / Lapsed |
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