Patent US3898189A successfully refreshed from Google Patents.
US3898189A
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Preparation in aqueous medium of pulverulvent compositions of vinyl chloride based polymers and copolymers for immediate use
Assignee: Rhone Progil SA
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Filing: 1974-02-01
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Granted: 1975-08-05
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Expires: 1994-02-01
Abstract
Abstract The preparation in aqueous medium of pulverulent compositions of vinyl chloride based polymers and copolymers containing various additives for their use, in which the liquid additives and at least a part of the solid additives are introduced with mixing in the form of one or more finely divided aqueous dispersions of a homogeneous phase. The formed compositions are suitable, without intermediate treatment, for the fabrication of articles by molding, calendering, extrusion, blow molding, injection molding, and the like.
Inventors
- 👤 Bernard Bonnaud
- 👤 Yves Fagnoni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:25
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
102 words
A METHOD OF PREPARING PULVERULENT POLYMER OR COPOLYMER COMPOSITIONS BASED ON VINYL CHLORIDE AND SUITABLE FOR IMMEDIATE USE COMPRISING MIXING THE POLYMERS AND/OR COPOLYMER OF VINYL CHLORIDE AND ONE OR MORE ADDITIVE NECESSARY OF OR THEIR USE INCLUDING STABILIZERS PLASTICIZERS LUBRICANT PIGMENTS COLORANTS AND FILLERS IN AN AQUEOUS MEDIUM SEPARATING SAID COMPOSITIONS FROM THE AQUEOUS MEDIUM AND DRYING THE SEPARATED COMPOSITION WHEREIN THE LIQUID ADDITIVES AND AT LEAST A PART OF THE FUSIBLE SOLID ADDITIVES ARE INTRODUCED INTO THE MIXING ZONE IN THE FORM OF ONE OR MORE FINELY DIVIDED AQUEOUS DISPERSIONS OF A HOMOGENEOUS PHASE AND MAINTAINING SAID MATERIAL UNDER AGITATION.
Claim 2
Independent Claim
102 words
A METHOD OF PREPARING PULVERULENT POLYMER OR COPOLYMER COMPOSITIONS BASED ON VINYL CHLORIDE AND SUITABLE FOR IMMEDIATE USE COMPRISING MIXING THE POLYMERS AND/OR COPOLYMER OF VINYL CHLORIDE AND ONE OR MORE ADDITIVE NECESSARY OF OR THEIR USE INCLUDING STABILIZERS PLASTICIZERS LUBRICANT PIGMENTS COLORANTS AND FILLERS IN AN AQUEOUS MEDIUM SEPARATING SAID COMPOSITIONS FROM THE AQUEOUS MEDIUM AND DRYING THE SEPARATED COMPOSITION WHEREIN THE LIQUID ADDITIVES AND AT LEAST A PART OF THE FUSIBLE SOLID ADDITIVES ARE INTRODUCED INTO THE MIXING ZONE IN THE FORM OF ONE OR MORE FINELY DIVIDED AQUEOUS DISPERSIONS OF A HOMOGENEOUS PHASE AND MAINTAINING SAID MATERIAL UNDER AGITATION.
Claim 3
Dependent Claim
31 words
A method according to claim 1, wherein the quantity of plasticizers utilized varies from 0 to 10 parts by weight per 100 parts of polymer or copolymer based on vinyl chloride.
Claim 4
Dependent Claim
37 words
A method accorDing to claim 1, wherein each of the liquid additives and the solid fusible additives are introduced separately into the mixing zone in the form of a finely divided aqueous dispersion of a homogeneous phase.
Claim 5
Dependent Claim
36 words
A method according to claim 1, wherein the liquid additives and the fusible solid additives are introduced into the mixing zone using a minimum number of aqueous dispersions prepared from a minimun number of homogeneous phases.
Claim 6
Dependent Claim
35 words
A method according to claim 1, wherein one or more of said homogeneous phases is obtained by a method including heating the additives which constitute it to a temperature in the range from 20*to 150*C.
Claim 7
Dependent Claim
40 words
A method according to claim 1, wherein there is introduced into the mixing zone, in the form of a finely divided aqueous dispersion of a homogeneous phase, all the fusible solid additives which are suitable for handling in that form.
Claim 8
Dependent Claim
34 words
A method according to claim 1, wherein the concentration in the homogeneous phases of one or more of said finely divided aqueous dispersions of the homogeneous phase is from 10 to 40% by weight.
Claim 9
Dependent Claim
33 words
A method according to claim 1, wherein the droplets of one or more of said finely divided aqueous dispersions of a homogeneous phase have a mean diameter of from 1 to 30 microns.
Claim 10
Dependent Claim
19 words
A method according to claim 8, wherein said droplets have a mean diameter of from 10 to 20 microns.
Claim 11
Dependent Claim
42 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and that, during said mixing, the mixing zone is maintained under agitation at high turbulence.
Claim 12
Dependent Claim
63 words
A method according to claim 1, wherein the whole of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and after said mixing and before said separation from the liquid medium the aqueous composition is thermally treated under agitation at a temperature within the range of 60*-100*C and for a time within the range of 2-60 minutes.
Claim 13
Dependent Claim
83 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used are introduced to the mixing zone in the form of a latex and after said mixing or after said mixing and dilution, there is added an aqueous solution of a coagulating agent, then subjecting the aqueous composition to thermal treatment under agitation before separation from the liquid medium at a temperature within the range of 60*-100*C and for a time within the range of 2-60 minutes.
Claim 14
Dependent Claim
38 words
A method according to claim 10 wherein the whole of the polymers and/or copolymers used are introduced to the mixing zone in the form of a latex and after said mixing the aqueous composition is subjected to atomization.
Claim 15
Dependent Claim
24 words
A method according to claim 13, wherein said atomization operation of the aqueous composition is carried out at a temperature of from 55*to 110*C.
Claim 16
Dependent Claim
48 words
A method according to claim 1 in which the liquid additives are selected from the group consisting of organic salts of tin, metallic soaps having a short chain length, esters of glycerol and oleic acid, esters of glycerol and recinoleic acid, trinonylphenylphosphite, dioctyl phthalate and epoxidized soya oil.
Claim 17
Dependent Claim
39 words
A method according to claim 1 in which the solid fusible additives are selected from the group comprising waxy esters, natural waxes, polyethylene waxes, paraffin waxes, fatty acids, fatty alcohols, amines of fatty acids, alphaphenylindol and calcium hydroxy stearate.
Claim 18
Dependent Claim
50 words
A method according to claim 1, wherein at least one nonionic emulsifier is used as a dispersing agent in an amount of 0.2 to 20% by weight of the homogeneous phase to be dispersed, in the preparation of one or more of said finely divided aqueous dispersions of homogeneous phase.
Claim 19
Dependent Claim
17 words
A method according to claim 17 wherein the nonionic emulsifier is selected from the alkyl phenol polyoxyeThylenes.
Claim 20
Dependent Claim
50 words
A method according to claim 1 wherein at least one protective colloid is used as a dispersing agent in an amount of 0.2% to 20% by weight of the homogeneous phase to be dispersed, in the preparation of one or more of said finely divided aqueous dispersions of homogeneous phase.
Claim 21
Dependent Claim
31 words
A method according to claim 19, wherein the protective colloid is selected from methylcelluloses, polyvinyl alcohol and copolymer of maleic anhydride and of styrene partly neutralized by potassium or sodium hydroxide.
Claim 22
Dependent Claim
54 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein the concentration of dry matter in the aqueous medium after the introduction of ingredients into the mixing zone is between 20 to 40% by weight.
Claim 23
Dependent Claim
54 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein the concentration of dry matter in the aqueous medium after the introduction if ingredients into the mixing zone is between 25 and 35% by weight.
Claim 24
Dependent Claim
45 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, during the mixing operation, the temperature of the aqueous medium is maintained from 20* to 90*C.
Claim 25
Dependent Claim
45 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, during the mixing operation, the temperature of the aqueous medium is maintained from 25* to 60*C.
Claim 26
Dependent Claim
71 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, when the mixing operation is terminated, after eventual dilution, the particles of sticking latex which are not fixed onto the particles of polymers of copolymers prepared by suspension or bulk polymerization are coagulated by addition of a solution of a coagulating agent.
Claim 27
Dependent Claim
50 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, when the mixing operation is terminated, after eventual dilution, at least one sticking latex is added and its coagulation is effected.
Claim 28
Dependent Claim
60 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, when the mixing operation is terminated, after eventual dilution, at least one non-sticking latex is added to the aqueous medium and coagulated by addition of a solution of a coagulating agent.
Claim 29
Dependent Claim
72 words
A method according to claim 1, wherein at least a part of the polymers and/or copolymers used have been prepared by aqueous suspension polymerization or in bulk and wherein, when the mixing operation is terminated, after eventual dilution, at least one sticking latex and at least one non-sticking latex are added successively to the aqueous medium simultaneously or successively and in arbitrary order and their coagulation is carried out simultaneously or successively.
Claim 30
Dependent Claim
53 words
A method according to claim 1, wherein all the polymers and copolymers used are introduced to the mixing zone in the form of a latex and wherein the concentration of dry matter in the aqueous medium, after the introduction of ingredients into the mixing zone, is from about 15% to 45% by weight.
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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |