US4914154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel matting agent and its use
Assignee: Wacker Chemie AG
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Filing: 1985-08-15
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Granted: 1990-04-03
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Expires: 2005-08-15
Abstract
Abstract A matting agent for plastic compositions comprising either a high molecular weight, gel-containing vinyl chloride polymer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.2 cm 3 /g, a maximum plasticizer absorption of 15%, a particle size parameter d' of 10 to 80 μm and a coefficient of uniformity n greater than 3, or a high molecular weight, gel containing copolymer of vinyl chloride and 1 to 40% by weight of comonomer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.10 cm 3 /g, a maximum plasticizer absorption of 10%, a particle size parameter d' of 10 to 80 μm and a coefficient of uniformity n greater than 3, plastic articles containing said matting agent and a method of imparting a matt to the surface of plastic articles.
Inventors
- 👤 Ingo Haller
- 👤 Ernst Spindler
- 👤 Manfred Heisler
- 👤 Willi Kleine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:14
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L2205/00; C08L2205/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A matting agent for plastic compositions which is a high molecular weight, gel-containing vinyl chloride polymer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.2 cm 3 /g, a maximum plasticizer absorption of 15%, a particle size parameter d' of 10 to 80 μm and a coefficient of uniformity n greater than 3.
Claim 2
Dependent Claim
60 words
A matting agent for plastic compositions which is a high molecular weight, gel-containing vinyl chloride polymer with a gel content of 10 to 99% by weight, a maximum mercury porosity of 0.2 cm 3 /g, a maximum plasticizer absorption of 15%, a particle size parameter d' of 10 to 80 μm and a coefficient of uniformity n greater than 3.
Claim 3
Dependent Claim
15 words
A matting agent of claim 1 wherein the gel content is above 25% by weight.
Claim 4
Dependent Claim
16 words
A matting agent of claim 1 wherein the gel content is 40 to 90% by weight.
Claim 5
Dependent Claim
16 words
A matting agent of claim 1 wherein the mercury porosity maximum is 0.15 cm 3 /g.
Claim 6
Dependent Claim
16 words
A matting agent of claim 1 wherein the maximum mercury porosity is 0.10 cm 3 /g.
Claim 7
Dependent Claim
15 words
A matting agent of claim 1 wherein the parameter d' is 30 to 70 μm.
Claim 8
Dependent Claim
14 words
A matting agent of claim 1 wherein the coefficient n is greater than 4.
Claim 9
Dependent Claim
38 words
A plastic composition based on a vinyl chloride polymer for production of shaped articles, sheet-like articles and coatings with a silk-matt surface comprising a vinyl chloride matrix polymer, optional customary additives and a matting agent of claim 2.
Claim 10
Dependent Claim
17 words
A composition of claim 8 wherein the matrix polymer has a K value of 50 to 80.
Claim 11
Dependent Claim
17 words
A composition of claim 8 wherein the matrix polymer has a K value of 60 to 85.
Claim 12
Dependent Claim
36 words
A method of imparting to articles made of a vinyl chloride matrix polymer a silk-matt surface comprising incorporating into the matrix polymer a sufficient amount of a matting agent of claim 2 to obtain silk-matt surface.
Claim 13
Dependent Claim
25 words
The method of claim 11 wherein the matrix polymer has a K value of 60 to 100 and is in the form of a plastisol.
Claim 14
Dependent Claim
22 words
The method of claim 12 wherein the amount of matting agent is 10 to 50% by weight based on the total polymer.
References Cited (Backward Citations)
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US3538067A
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US3956251A
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US3753966A
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US3767637A
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US3706705A
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US4058495A
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US4206298A
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JPS59109504A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |