US4119601A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulverulent compositions based on vinyl chloride
Assignee: Rhone Poulenc Industries SA
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Filing: 1976-12-08
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Granted: 1978-10-10
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Expires: 1996-12-08
Abstract
Abstract Method of preparing pulverulent polymer or copolymer compositions based on vinyl chloride and suitable for immediate use comprising preparing a master mixture of said polymers and/or copolymers based on vinyl chloride and additives employed therewith in use by mixing in an aqueous medium one or more of said polymers and/or copolymers and said additives in the form of liquid additives and/or fusible solid additives, the liquid additives and at least part of the fusible solid additives being introduced with agitation in the form of one or more dispersions of finely divided particles of a homogeneous phase in water, and mixing the master mixture with the remainder of the polymer and/or copolymers based on vinyl chloride.
Inventors
- 👤 Bernard Bonnaud
- 👤 Yves Fagnoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:52
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/22; C08J3/226; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2427/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
119 words
Method of preparing pulverulent polymer or copolymer compositions based on vinyl chloride and suitable for immediate use comprising preparing a master mixture of said polymers and/or copolymers based on vinyl chloride and additives employed therewith in use by mixing in an aqueous medium a fraction of the one or more of said polymers and/or copolymers and said additives in the form of liquid additives and/or fusible solid additives, the liquid additives and at least part of the fusible solid additives being introduced with agitation in the form of one or more dispersions of finely divided particles of a homogenous phase in water, and mixing the master mixture with the remainder of the polymer and/or copolymers based on vinyl chloride.
Claim 2
Dependent Claim
119 words
Method of preparing pulverulent polymer or copolymer compositions based on vinyl chloride and suitable for immediate use comprising preparing a master mixture of said polymers and/or copolymers based on vinyl chloride and additives employed therewith in use by mixing in an aqueous medium a fraction of the one or more of said polymers and/or copolymers and said additives in the form of liquid additives and/or fusible solid additives, the liquid additives and at least part of the fusible solid additives being introduced with agitation in the form of one or more dispersions of finely divided particles of a homogenous phase in water, and mixing the master mixture with the remainder of the polymer and/or copolymers based on vinyl chloride.
Claim 3
Dependent Claim
37 words
The method as claimed in claim 1, in which the quantity of polymers and/or copolymers based on vinyl chloride in the master mixture is within the range of 40 to 90% by weight of the master mixture.
Claim 4
Dependent Claim
29 words
The method as claimed in claim 2, in which said quantity of polymers and/or copolymers is within the range of 60 to 80% by weight of the master mixture.
Claim 5
Dependent Claim
28 words
The method as claimed in claim 1, in which the quantity of master mixture in said pulverulent composition is at least 10% by weight of the pulverulent composition.
Claim 6
Dependent Claim
32 words
The method as claimed in claim 4, in which the quantity of master mixture in said pulverulent composition is within the range of 20 to 60% by weight of the pulverulent composition.
Claim 7
Dependent Claim
43 words
The method as claimed in claim 1, which includes the step of separating the aqueous medium and drying the master mixture, and mixing the dried master mixture with the remainder of the polymers and/or copolymers based on vinyl chloride in the dry state.
Claim 8
Dependent Claim
63 words
The method as claimed in claim 1, in which the polymers and/or copolymers based on vinyl chloride mixed with the master mixture are prepared by polymerization in aqueous suspension, mixing the master mixture and polymers and/or copolymers based on vinyl chloride in the form of their respective aqueous suspensions in which they are prepared, and separating and drying the polymeric composition thus obtained.
Claim 9
Dependent Claim
27 words
The method as claimed in claim 7, which includes the step of heating the master mixture suspension under agitation before mixing with the polymer and/or copolymer suspension.
Claim 10
Dependent Claim
30 words
The method as claimed in claim 7 which includes the step of heating with agitation the aqueous composition obtained upon mixing the master mixture and the polymer and/or copolymer suspensions.
Claim 11
Dependent Claim
25 words
The method as claimed in claim 8, in which the heating is carried out at a temperature within the range of 60° to 100° C.
Claim 12
Dependent Claim
25 words
The method as claimed in claim 9, in which the aqueous composition is heated to a temperature within the range of 60° to 100° C.
Claim 13
Dependent Claim
22 words
The method as claimed in claim 8, in which the duration of heating is within the range of 2 to 60 minutes.
Claim 14
Dependent Claim
20 words
The method as claimed in claim 9, in which the aqueous composition is heated for from 2 to 60 minutes.
Claim 15
Dependent Claim
16 words
The method as claimed in claim 6, in which the mixing is carried out by fluidization.
Claim 16
Dependent Claim
15 words
The method as claimed in claim 6, in which the mixing is carried out mechanically.
References Cited (Backward Citations)
US3898189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-09 | 1982-04-10 | 1982-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-09 | 1986-04-10 | 1986-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-09 | 1990-04-10 | 1990-10-10 | $7700.00 | Window Closed / Lapsed |