Patent US4461848A successfully refreshed from Google Patents.
US4461848A
Expired / Lapsed
US
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Production of vesiculated polymer beads
Assignee: Tioxide Group Ltd
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Filing: 1982-10-29
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Granted: 1984-07-24
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Expires: 2002-10-29
Abstract
Abstract An improved process for the manufacture of vesiculated beads has been developed which can be used for the production of semi-gloss or satin finished paints. The process involves mixing an oil-phase containing a cross-linkable polyester resin in solution with a monomer co-polymerizable with the resin and an aqueous phase containing an emulsifying agent under conditions such that globules of the oil-phase are formed having a diameter of less than 1.5 microns. The emulsion containing the globules also contains a base and the amount of the emulsifying agent is from 3 to 16 grams per 100 ml of the oil-phase and the volume fraction has a value of 0.2 to 0.4 and X as defined is from 4 to 8. Preferably the beads are pigmented with titanium dioxide pigment.
Inventors
- 👤 Edmund J. Lawson
- 👤 Charles G. Waterfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:57
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08F; C08F299/00; C08F299/02; C08F299/04; C08F299/0407; C09; C09D; C09D7/00; C09D7/40; C09D7/42; C08J2367/00; C08J2367/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
160 words
A process for the manufacture of vesiculated polymer beads which comprises: forming an oil phase (A) by dissolving a cross-linkable water-insoluble carboxyl containing polyester resin in a monomer copolymerisable with said resin; forming an aqueous phase (B) by dissolving an emulsifying agent in an aqueous solution; mixing phases (A) and (B) to form an emulsion of (A) in (B) in which 95% of the golubles of (A) so formed usually have a diameter of less than 1.5 microns, said emulsion also containing a base; and polymerising the resin of the golubles to form the desired vesiculated beads in which process the amount of the emulsifying agent is from 3 to 16 grams per 100 ml. of (A), the total amount of the base is from 0.3 to 10 equivalents per carboxyl group of the resin, the volume fraction ##EQU5## has a value of 0.2 to 0.4, and the value of X in the relationship ##EQU6## is from 4 to 8.
Claim 2
Dependent Claim
160 words
A process for the manufacture of vesiculated polymer beads which comprises: forming an oil phase (A) by dissolving a cross-linkable water-insoluble carboxyl containing polyester resin in a monomer copolymerisable with said resin; forming an aqueous phase (B) by dissolving an emulsifying agent in an aqueous solution; mixing phases (A) and (B) to form an emulsion of (A) in (B) in which 95% of the golubles of (A) so formed usually have a diameter of less than 1.5 microns, said emulsion also containing a base; and polymerising the resin of the golubles to form the desired vesiculated beads in which process the amount of the emulsifying agent is from 3 to 16 grams per 100 ml. of (A), the total amount of the base is from 0.3 to 10 equivalents per carboxyl group of the resin, the volume fraction ##EQU5## has a value of 0.2 to 0.4, and the value of X in the relationship ##EQU6## is from 4 to 8.
Claim 3
Dependent Claim
19 words
A process according to claim 1 in which the volume fraction (R) had a value of 0.25 to 0.35.
Claim 4
Dependent Claim
25 words
A process according to claim 1 in which the amount of the emulsifying agent is from 5 to 12 grams per 100 ml of (A).
Claim 5
Dependent Claim
26 words
A process according to claim 1 in which the total amount of said base is from 1 to 4 equivalents per carboxyl group of the resin.
Claim 6
Dependent Claim
30 words
A process according to claim 1 in which the carboxyl containing polyester resin is a condensation product of a dihydric alchol, an aliphatic dicarboxylic acid and an aromatic dicarboxylic acid.
Claim 7
Dependent Claim
28 words
A process according to claim 1 in which the monomer is present in the oil-phase (A) in an amount of at least 30% by weight of the resin.
Claim 8
Dependent Claim
15 words
A process according to claim 1 in which the monomer is an unsaturated aromatic hydrocarbon.
Claim 9
Dependent Claim
35 words
A process according to claim 1 in which the emulsifying agent is a partially hydrolysed polyvinyl-acetate having a molecular weight of up to 150,000 and having from 85% to 95% of its hydrolysable groups hydrolysed.
Claim 10
Dependent Claim
32 words
A process according to claim 1 in which at least part of the total amount of said base is present in the aqueous phase (B) prior to mixing with said oil-phase (A).
Claim 11
Dependent Claim
30 words
A process according to claim 9 in which a further quantity of said base is added to the emulsion during mixing of said oil-phase (A) and said aqueous phase (B).
Claim 12
Dependent Claim
30 words
A process according to claim 9 in which a further quantity of said base is added to the emulsion after mixing of said oil-phase (A) and said aqueous phase (B).
Claim 13
Dependent Claim
24 words
A process according to claim 1 in which a pigment is mixed with said oil-phase (A) prior to mixing of phases (A) and (B).
Claim 14
Dependent Claim
33 words
A process according to claim 12 in which the amount of said pigment is such as to introduce into said beads up to 60% by weight of the total weight of said beads.
Claim 15
Dependent Claim
13 words
A process according to claim 13 in which the pigment is titanium dioxide.
References Cited (Backward Citations)
US3255127A
Cited
GB1167979A
Cited
GB1288583A
Cited
GB1332469A
Cited
US3822224A
Cited
GB1450073A
Cited
GB1476510A
Cited
GB1548294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |