US3875130A
Expired / Lapsed
US
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Preparation with seeding of polymers insoluble in their monomeric compositions
Assignee: Produits Chimiques Pechiney Saint Gobain
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Filing: 1973-03-02
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Granted: 1975-04-01
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Expires: 1993-03-02
Abstract
Abstract This invention is addressed to a process for the preparation of polymers having a narrow granulometric distribution which are insoluble in their monomeric compositions wherein a vinyl monomer is polymerized in the presence of an organo soluble catalyst in the presence of seed particles having diameters within the range of 0.01-5 microns which are insoluble in the monomeric material.
Inventors
- 👤 Thomas Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
C; C08; C08F; C08F259/00; C08F259/02; C08F259/04
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
134 words
A PROCESS FOR THE PREPARATION OF VINYL POLYMERS HAVING A NARROW GRANULOMATRIC DISTRIBUTION WHICH ARE INSOLUBLE IN THEIR MONOMERIC COMPOSITIONS, COMPRISING POLYMERIZING A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND A MIXTURE CONSISTING ESSENTIALLY OF A VINYL CHLORIDE WITH AT LEAST ONE OTHER VINYL MONOMER COPOLYMERIZABLE THEREWITH IN THE PRESENCE OF AN ORGANO SOLUBLE CATALYST AND IN THE PRESENCE OF 1-20 PERCENT BY WEIGHT OF SEED PARTICLES HAVING A DIAMETER WITHIN THE RANGE OF 0.01 TO 5 MICRONS WHICH ARE INSOLUBLE IN THE MONOMERIC MATERIAL, SAID SEED PARTILES BEING OBTAINED BY TREATING WITH A SEMI-SOLVENT A POLYMER SELECTED FROM THE GROUP CONSISTING OF A POLYVINYL CHLORIDE AND A COPOLYMER OF VINYL CHLORIDE WITH AT LEAST ONE OTHER VINYL MONOMER COPOLYMERIZABLE THEREWITH AND PREPARED BY POLYMERIZATION IN EMULSION OR FINE SUSPENSION.
Claim 2
Dependent Claim
134 words
A PROCESS FOR THE PREPARATION OF VINYL POLYMERS HAVING A NARROW GRANULOMATRIC DISTRIBUTION WHICH ARE INSOLUBLE IN THEIR MONOMERIC COMPOSITIONS, COMPRISING POLYMERIZING A MONOMERIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF VINYL CHLORIDE AND A MIXTURE CONSISTING ESSENTIALLY OF A VINYL CHLORIDE WITH AT LEAST ONE OTHER VINYL MONOMER COPOLYMERIZABLE THEREWITH IN THE PRESENCE OF AN ORGANO SOLUBLE CATALYST AND IN THE PRESENCE OF 1-20 PERCENT BY WEIGHT OF SEED PARTICLES HAVING A DIAMETER WITHIN THE RANGE OF 0.01 TO 5 MICRONS WHICH ARE INSOLUBLE IN THE MONOMERIC MATERIAL, SAID SEED PARTILES BEING OBTAINED BY TREATING WITH A SEMI-SOLVENT A POLYMER SELECTED FROM THE GROUP CONSISTING OF A POLYVINYL CHLORIDE AND A COPOLYMER OF VINYL CHLORIDE WITH AT LEAST ONE OTHER VINYL MONOMER COPOLYMERIZABLE THEREWITH AND PREPARED BY POLYMERIZATION IN EMULSION OR FINE SUSPENSION.
Claim 3
Dependent Claim
22 words
A process as defined in claim 1 wherein the seed particles have a diameter within the range of 0.01 to 2 microns.
Claim 4
Dependent Claim
50 words
A process as defined in claim 1 wherein the seed particles are derived from a latex formed by polymerizing a seed monomer selected from the group consisting of vinyl chloride and a mixture of vinyl chloride with at least one other vinyl monomer copolymerizable therewith in emulsion or fine suspension.
Claim 5
Dependent Claim
81 words
A process as defined in claim 1 wherein the seed particles are prepared by polymerizing a seed monomer selected from the group consIsting of vinyl chloride and a mixture of vinyl chloride with at least one other vinyl monomer copolymerizable therewith in emulsion or fine suspension to form a latex, separating the resulting seed polymer from the latex by atomizing the latex, and treating the seed polymer particles with a semisolvent whereby the particles are broken down into their constitutive micellae.
Claim 6
Dependent Claim
27 words
A process as defined in claim 4 wherein the seed polymer separated from the latex by atomizing the latex is ground prior to treatment with the semi-solvent.
Claim 7
Dependent Claim
21 words
A process as defined in claim 4 wherein the temperature of the latex during atomization is within the range of 60*-85*C.
Claim 8
Dependent Claim
21 words
A process as defined in claim 4 wherein the temperature of the latex during atomization is within the range of 65*-75*C.
Claim 9
Dependent Claim
80 words
A process as defined in claim 1 wherein the seed particles are prepared by polymerizing a seed monomer selected from the group consisting of vinyl chloride and a mixture of vinyl chloride with at least one other vinyl monomer copolymerizable therewith in emulsion or fine suspension to form a latex, treating the said latex by filtration and treating the resulting cake containing the seed polymer with a semi-solvent whereby the seed polymer particles are broken down into their constitutive micellae.
Claim 10
Dependent Claim
81 words
A process as defined in claim 1 wherein the seed particles are prepared by polymerizing a seed monomer selected from the group consisting of vinyl chloride and a mixture of vinyl chloride with at least one other vinyl monomer copolymerizable therewith in emulsion or fine suspension to form a latex, treating the said latex by centrifugal decantation and treating the resulting cake containing the seed polymer with a semi-solvent whereby the seed polymer particles are broken donw into their constitutive micellae.
Claim 11
Dependent Claim
26 words
A process as defined in claim 4 wherein said semi-solvent is selected from the group consisting of plasticizers for said vinyl polymer and aliphatic chlorinated hydrocarbons.
Claim 12
Dependent Claim
24 words
A process as defined in claim 4 wherein said semi-solvent is a plasticizer selected from the group consisting of alkyl phthalates, adipates and isobutyrates.
Claim 13
Dependent Claim
32 words
A process as defined in claim 4 wherein the semi-solvent is used in an amount corresponding to 30 to 400 percent by weight based upon the weight of the seed polymer particles.
Claim 14
Dependent Claim
33 words
A process as defined in claim 4 wherein the semi solvent is used in an amount corresponding to 50 to 150 percent by weight based upon the weight of the seed polymer particles.
Claim 15
Dependent Claim
34 words
A process as defined in claim 3 wherein the seed particles are derived from a latex prepared by polymerization of the seed monomer in emulsion in the presence of a water-soluble free radical catalyst.
Claim 16
Dependent Claim
30 words
A process as defined in claim 3 wherein the seed particle are derived from a latex prepared by polymerization in fine suspension in the presence of an organo soluble catalyst.
Claim 17
Dependent Claim
34 words
A process as defined in claim 1 wherein the organo soluble catalyst is selected from the group consisting of lauroyl peroxide, diethylhexylpercarbonate, azobis-isobutyronitrile, isopropylperoxy dicarbonate, sulfonyl-acetylcyclohexane peroxide, tertiobutyl perpivalate, alphachloroaproyl peroxide, and mixtures thereof.
Claim 18
Dependent Claim
33 words
A process as defined in claim 1 wherein the catalyst is employed in an amount within the range of .01 to 1 percent by weight based on the weight of the monomeric material.
Claim 19
Dependent Claim
33 words
A process as defined in claim 1 wherein the catalyst is employed in an amount within the range of 0.02 to 0.2 percent by weight based on the weight of the monomeric material.
Claim 20
Dependent Claim
20 words
A process as defined in claim 1 wherein the reaction is carried out within the range of 30* to 75*C.
Claim 21
Dependent Claim
20 words
A process as defined in claim 1 wherein the reaction is carried out within the range of -50* to 90*C.
Claim 22
Dependent Claim
25 words
A process as defined in claim 1 wherein the seed particles constitute between 2-10 percent by weight based on the weight of the monomeric material.
Claim 23
Dependent Claim
26 words
A process as defined in claim 1 wherein said other monomer is selected from the group consisting of olefins, vinyl acetate, vinylidene chloride and mixtures thereof.
Claim 24
Dependent Claim
24 words
A process as defined in claim 1 wherein said other monomer constitutes between 0.1 and 30 percent by weight based on the total weight.
Claim 25
Dependent Claim
31 words
A process as defined in claim 3 wherein the other vinyl monomer of said seed polymer is selected from the group consisting of olefins, vinyl acetate, vinylidene chloride and mixtures thereof.
Claim 26
Dependent Claim
24 words
Polymers prepared by the process of claim 1 having grain diameters within the range of 10-60 microns and being insoluble in said monomeric material.
Claim 27
Dependent Claim
25 words
A process as defined in claim 3 wherein the seed particles are prepared from a monomeric composition which is the same as said monomeric material.
Claim 28
Dependent Claim
17 words
A process as defined in claim 8 wherein the cake is dried before treating with the semi-solvent.
Claim 29
Dependent Claim
17 words
A process as defined in claim 9 wherein the cake is dried before treating with the semi-solvent.
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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |