US4611026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion and dispersion comprising cross-linked polymeric microgel prepared from polymerizing epoxy-containing monomer in the presence of an acid
Assignee: PPG Industries Inc
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Filing: 1985-06-21
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Granted: 1986-09-09
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Expires: 2005-06-21
Abstract
Abstract A process for preparing polymeric microgel by aqueous dispersion polymerization techniques is disclosed. The emulsion can be inverted into organic diluent, and the water removed to form a dispersion of the microgel in the organic diluent. The microgel can be formulated into coating compositions where it improves the sag resistance and metallic pigment pattern control of the coating composition.
Inventors
- 👤 Kurt G. Olson
- 👤 Suryya K. Das
- 👤 Rostyslaw Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:27
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/32; Y; Y10; Y10S; Y10S524/00; Y10S524/923
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
An emulsion of crosslinked polymeric particles which are obtained by polymerizing a mixture of polymerizable ethylenically unsaturated monomers which contain greater than 2 percent by weight of a 1,2-epoxy group-containing ethylenically unsaturated monomer, the percentage by weight being based on total weight of polymerizable ethylenically unsaturated monomers, via aqueous emulsion polymerization techniques in the presence of acid having a pKa of -10 to 4 and in which the pH of the aqueous medium is less than 2.5; the 1,2-epoxy group-contaning vinyl monomer and acid being present in amounts sufficient to form crosslinked polymeric particles.
Claim 2
Dependent Claim
94 words
An emulsion of crosslinked polymeric particles which are obtained by polymerizing a mixture of polymerizable ethylenically unsaturated monomers which contain greater than 2 percent by weight of a 1,2-epoxy group-containing ethylenically unsaturated monomer, the percentage by weight being based on total weight of polymerizable ethylenically unsaturated monomers, via aqueous emulsion polymerization techniques in the presence of acid having a pKa of -10 to 4 and in which the pH of the aqueous medium is less than 2.5; the 1,2-epoxy group-contaning vinyl monomer and acid being present in amounts sufficient to form crosslinked polymeric particles.
Claim 3
Dependent Claim
13 words
The emulsion of claim 1 in which the acid is a sulfonic acid.
Claim 4
Dependent Claim
12 words
The emulsion of claim 2 in which the acid is para-toluenesulfonic acid.
Claim 5
Dependent Claim
16 words
The emulsion of claim 2 in which the acid is a sulfonic acid group-containing vinyl monomer.
Claim 6
Dependent Claim
45 words
The emulsion of claim 4 in which the sulfonic acid group-containing vinyl monomer has the structure: ##STR1## where R is selected from the class consisting of hydrogen and C 1 to C 4 alkyl, and R' is alkylene containing from 1 to 6 carbon atoms.
Claim 7
Dependent Claim
21 words
The emulsion of claim 1 in which the emulsion has a resin solids content of from about 15 to 70 percent.
Claim 8
Dependent Claim
24 words
A dispersion in which the aqueous emulsion of claim 1 is inverted into organic diluent and the resultant dispersion is at least partially dehydrated.
Claim 9
Dependent Claim
18 words
The dispersion of claim 7 which has a resin solids content of from about 2 to 65 percent.
Claim 10
Dependent Claim
9 words
A coating composition containing the dispersion of claim 7.
Claim 11
Dependent Claim
9 words
A coating composition containing the emulsion of claim 1.
References Cited (Backward Citations)
US3440200A
Cited
US4180619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |