Patent US4139437A successfully refreshed from Google Patents.
US4139437A
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Process for preparing a thermosetting aqueous polymer emulsion using radiation
Assignee: Kansai Paint Co Ltd
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Filing: 1978-04-18
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Granted: 1979-02-13
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Expires: 1998-04-18
Abstract
Abstract A process is, herein, disclosed for preparing a thermosetting aqueous polymer emulsion comprising; (1) DISPERSING A MONOMER MIXTURE OF 90.0 - 99.9 WT % OF A RADICAL POLYMERIZABLE HYDROPHOBIC ETHYLENIC UNSATURATED MONOMER HAVING AN ETHYLENIC UNSATURATED BOND IN ITS MOLECULE AND 0.1 - 10.0 WT % OF A RADICAL POLYMERIZABLE CROSSLINKABLE MONOMER HAVING MORE THAN TWO ETHYLENIC UNSATURATED BONDS IN ITS MOLECULE IN WATER IN WHICH A SPECIFIC AMOUNT OF SURFACE ACTIVE AGENT IS DISSOLVED TO FORM A DISPERSION.
Inventors
- 👤 Kunio Araki
- 👤 Keizo Makuuchi
- 👤 Tohru Takagi
- 👤 Hiroyuki Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:28
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/46; C08F291/00; C08F291/18
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
178 words
A process for preparing a thermosetting aqueous polymer emulsion comprising: (1) dispersing a monomer mixture of 90.0-99.9 wt % of a radical polymerizable hydrophobic ethylenic unsaturated monomer having an ethylenic unsaturated bond in its molecule and 0.1-10.0 wt % of a radical polymerizable crosslinkable monomer having more than two ethylenic unsaturated bonds in its molecule in water in which a specific amount of surface active agent is dissolved to form a dispersion, (2) irradiating the dispersion with an ionizing radiation to effect the first stage emulsion polymerization, (3) adding a monomer mixture of 52.0-97.0 wt % of the radical polymerizable hydrophobic ethylenic unsaturated monomer, 2.5-40.0 wt % of a radical polymerizable ethylenic unsaturated monomer having a hydroxyl group and 0.5-8.0 wt % of a radical polymerizable ethylenic unsaturated monomer having a carboxyl group to the first stage polymer emulsion in the range of 1/9-6/4 parts by weight on the basis of the total amount of the unsaturated ethylenic unsaturated monomers used in the first stage emulsion polymerization, (4) irradiating with an ionizing radiation to carry out emulsion polymerization.
Claim 2
Dependent Claim
178 words
A process for preparing a thermosetting aqueous polymer emulsion comprising: (1) dispersing a monomer mixture of 90.0-99.9 wt % of a radical polymerizable hydrophobic ethylenic unsaturated monomer having an ethylenic unsaturated bond in its molecule and 0.1-10.0 wt % of a radical polymerizable crosslinkable monomer having more than two ethylenic unsaturated bonds in its molecule in water in which a specific amount of surface active agent is dissolved to form a dispersion, (2) irradiating the dispersion with an ionizing radiation to effect the first stage emulsion polymerization, (3) adding a monomer mixture of 52.0-97.0 wt % of the radical polymerizable hydrophobic ethylenic unsaturated monomer, 2.5-40.0 wt % of a radical polymerizable ethylenic unsaturated monomer having a hydroxyl group and 0.5-8.0 wt % of a radical polymerizable ethylenic unsaturated monomer having a carboxyl group to the first stage polymer emulsion in the range of 1/9-6/4 parts by weight on the basis of the total amount of the unsaturated ethylenic unsaturated monomers used in the first stage emulsion polymerization, (4) irradiating with an ionizing radiation to carry out emulsion polymerization.
Claim 3
Dependent Claim
38 words
The process of claim 1 wherein the radical polymerizable hydrophobic ethylenic unsaturated monomer having an ethylenic unsaturated bond in its molecule is selected from the group consisting of acrylic ester, methacrylic ester, vinyl ester, styrene and mixtures thereof.
Claim 4
Dependent Claim
40 words
The process of claim 1 wherein the radical polymerizable ethylenic unsaturated monomer having a hydroxyl group in its molecule is selected from the group consisting of 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, N-methylol-acrylamide, allyl alcohol and mixtures thereof.
Claim 5
Dependent Claim
37 words
The process of claim 1 wherein the radical polymerizable ethylenic unsaturated monomer having a carboxyl group in its molecule is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, itaconic acid and mixtures thereof.
Claim 6
Dependent Claim
54 words
The process of claim 1 wherein the radical polymerizable crosslinkable monomer having more than two ethylenic unsaturated bond in its molecule is selected from the group consisting of glycol dimethacrylate, di-or triacrylic ester or di-or trimethacrylic ester, tetramethacrylic ester or tetraacrylic ester of penlaery-thritol, triallyl compounds, divinyl benzene, di-or triproparglyic ester and mixtures thereof.
Claim 7
Dependent Claim
40 words
The process of claim 1 wherein the specific amount of the surface active agent is from 0.05% to 10.0%, more preferably from 0.05% to 1.0% on the basis of the weight of the total amount of the unsaturated monomers used.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein the ionizing radiation is selected from the group consisting of electron beam, alpha rays, beta rays, gamma rays and X-rays.
Claim 9
Dependent Claim
22 words
The process of claim 1 wherein the total dose of the radiation may range from 10 4 rad. to 10 6 rad.
Claim 10
Dependent Claim
38 words
The process of claim 1 wherein the total amount of the unsaturated monomers in an aqueous dispersion is from 10% to 65%, more preferably from 30% to 50% on the basis of the weight of the aqueous dispersion.
Claim 11
Dependent Claim
30 words
The process of claim 1 wherein the emulsion polymerization is carried out at temperatures of from -5° C. to 50° C., more preferably of from 0° C. to 30° C.
References Cited (Backward Citations)
US3311579A
Cited
US3985632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |