US4132700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing filled polyvinyl chloride compositions
Assignee: Albemarle Corp
•
Filing: 1976-02-04
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Granted: 1979-01-02
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Expires: 1996-02-04
Abstract
Abstract A process for preparing polyvinyl chloride compositions containing talc or kaolinite fillers, which have been pretreated with an acid wash solution.
Inventors
- 👤 Ruth E. Stephens, deceased
- 👤 executor by William L. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:25
CPC Classifications
C; C08; C08K; C08K9/00; C08K9/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
34 words
In a process for reinforcing polyvinyl chloride compositions the step consisting essentially of adding to said polyvinyl chloride compositions finely divided talc particles, said talc particles having been pretreated with an acid wash solution.
Claim 2
Dependent Claim
34 words
In a process for reinforcing polyvinyl chloride compositions the step consisting essentially of adding to said polyvinyl chloride compositions finely divided talc particles, said talc particles having been pretreated with an acid wash solution.
Claim 3
Dependent Claim
14 words
The process of claim 1 wherein said acid wash solution contains a mineral acid.
Claim 4
Dependent Claim
33 words
The process of claim 1 wherein said talc particles are added to the polyvinyl chloride compositions so as to comprise from about 10 to about 50% by weight of said polyvinyl chloride compositions.
Claim 5
Dependent Claim
27 words
A composition consisting essentially of polyvinyl chloride and finely divided particles of talc as a filler material, said talc particles having been pretreated with an acid solution.
Claim 6
Dependent Claim
27 words
A composition consisting essentially of polyvinyl chloride and finely divided particles of talc as a filler material, said talc particles having been pretreated with an acid solution.
Claim 7
Dependent Claim
11 words
The composition of claim 4 containing mineral acid pretreated talc particles.
Claim 8
Dependent Claim
34 words
In a process for reinforcing polyvinyl chloride compositions the step consisting essentially of adding to said polyvinyl chloride compositions finely divided kaolinite particles, said kaolinite particles having been pretreated with an acid wash solution.
Claim 9
Dependent Claim
34 words
In a process for reinforcing polyvinyl chloride compositions the step consisting essentially of adding to said polyvinyl chloride compositions finely divided kaolinite particles, said kaolinite particles having been pretreated with an acid wash solution.
Claim 10
Dependent Claim
14 words
The process of claim 6 wherein said acid wash solution contains a mineral acid.
Claim 11
Dependent Claim
33 words
The process of claim 6 wherein said kaolinite particles are added to said polyvinyl chloride compositions so as to comprise from about 10 to about 50% by weight of said polyvinyl chloride compositions.
Claim 12
Dependent Claim
27 words
A composition consisting essentially of polyvinyl chloride and finely divided particles of kaolinite as filler material, said kaolinite particles having been pretreated with an acid wash solution.
Claim 13
Dependent Claim
27 words
A composition consisting essentially of polyvinyl chloride and finely divided particles of kaolinite as filler material, said kaolinite particles having been pretreated with an acid wash solution.
Claim 14
Dependent Claim
11 words
The composition of claim 9 containing mineral acid pretreated kaolinite particles.
Claim 15
Dependent Claim
22 words
The composition of claim 9 wherein said kaolinite particles comprise from about 10 to about 50% by weight of polyvinyl chloride composition.
Claim 16
Dependent Claim
34 words
A reinforced solid shaped article having improved tensile strength consisting essentially of of polyvinyl chloride and an acid pretreated finely divided siliceous solid filler material selected from the group consisting of talc and kaolinite.
Claim 17
Dependent Claim
34 words
A reinforced solid shaped article having improved tensile strength consisting essentially of of polyvinyl chloride and an acid pretreated finely divided siliceous solid filler material selected from the group consisting of talc and kaolinite.
Claim 18
Dependent Claim
20 words
The article of claim 12 wherein said siliceous filler comprises from 10 to about 50% by weight of said article.
Claim 19
Dependent Claim
12 words
The article of claim 13 wherein said siliceous filler material is talc.
Claim 20
Dependent Claim
12 words
The article of claim 13 wherein said siliceous filler material is kaolinite.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-01 | 1982-07-03 | 1983-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-01 | 1986-07-03 | 1987-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-01 | 1990-07-03 | 1991-01-02 | $7700.00 | Window Closed / Lapsed |