US4153770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsifier for emulsion polymerization
Assignee: Kao Corp
•
Filing: 1977-09-15
•
Granted: 1979-05-08
•
Expires: 1997-09-15
Abstract
Abstract Vinyl polymers are prepared by emulsion polymerization using as an emulsifier a nonionic surfactant which has been prepared by adding 30 to 100 mols of alkylene oxide to one mol of a polyhydric alcohol having from 3 to 10 functional hydroxyl groups to form a first reaction product and then esterifying said first reaction product to introduce therein one to 2 mols of an acyl group having from 6 to 22 carbon atoms.
Inventors
- 👤 Yuzuru Ogata
- 👤 Takeshi Kawaguchi
- 👤 Ikuya Kinoshita
- 👤 Hirokazu Nakayama
- 👤 Toshinao Ukena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08G65/2609; C08G65/32; C08G65/329; C08G65/331; C08G65/332; C08G65/3322
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
143 words
In a process for preparing vinyl polymers by emulsion polymerization which comprises emulsifying an emulsion-polymerizable vinyl monomer in water and maintaining the emulsion under conditions effective to polymerize the monomer, the improvement which comprises: the emulsion is prepared by using as the emulsifier an effective emulsifying amount of a nonionic surfactant which has been prepared by adding 30 to 100 mols of alkylene oxide having from 2 to 4 carbon atoms to one mol of an aliphatic or alicyclic polyhydric alcohol having from 3 to 10 carbon atoms and from 3 to 10 functional hydroxyl groups to form a first reaction product and then esterifying said first reaction product with a long chain fatty acid to introduce one to 2 mols of an acyl group having from 6 to 22 carbon atoms, said emulsifier having an HLB value of from 17 to 19.
Claim 2
Dependent Claim
143 words
In a process for preparing vinyl polymers by emulsion polymerization which comprises emulsifying an emulsion-polymerizable vinyl monomer in water and maintaining the emulsion under conditions effective to polymerize the monomer, the improvement which comprises: the emulsion is prepared by using as the emulsifier an effective emulsifying amount of a nonionic surfactant which has been prepared by adding 30 to 100 mols of alkylene oxide having from 2 to 4 carbon atoms to one mol of an aliphatic or alicyclic polyhydric alcohol having from 3 to 10 carbon atoms and from 3 to 10 functional hydroxyl groups to form a first reaction product and then esterifying said first reaction product with a long chain fatty acid to introduce one to 2 mols of an acyl group having from 6 to 22 carbon atoms, said emulsifier having an HLB value of from 17 to 19.
Claim 3
Dependent Claim
19 words
A process as set forth in claim 1, wherein the acyl group is a straight chain aliphatic acyl group.
Claim 4
Dependent Claim
22 words
A process as set forth in claim 2, wherein the number of carbon atoms in the acyl group is 14 to 18.
Claim 5
Dependent Claim
15 words
A process as set forth in claim 1, wherein the alkylene oxide is ethylene oxide.
Claim 6
Dependent Claim
17 words
A process as set forth in claim 1, wherein the nonionic surfactant is polyoxyethylene (100) sorbitol sesquioleate.
Claim 7
Dependent Claim
94 words
A process as claimed in claim 1 wherein the nonionic surfactant has the empirical formula ##STR2## wherein A is the hydrocarbon residue of an aliphatic or alicyclic polyhydric alcohol having (p+q) hydroxyl groups, wherein p and q are numbers defined by the relations 3≦(p+q)≦10 and 1≦p≦2; R 1 and R 2 are alkylene having from 2 to 4 carbon atoms and R 1 and R 2 are the same or different; R 3 is alkyl or alkenyl having 5 to 21 carbon atoms; and m and n are numbers defined by the relation 30≦(m+n)(p+q)≦100.
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) | 1982-05-07 | 1982-11-06 | 1983-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-07 | 1986-11-06 | 1987-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-07 | 1990-11-06 | 1991-05-08 | $7700.00 | Window Closed / Lapsed |