US4413073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable aqueous film-forming dispersions
Assignee: Orica Ltd
•
Filing: 1982-06-29
•
Granted: 1983-11-01
•
Expires: 2002-06-29
Abstract
Abstract This invention relates to the preparation of stable aqueous dispersions of particles of film-forming polymer, the particles comprising at least one pre-formed polymer and at least one polymer formed in situ ("multi-polymer particles"). The inadequate stability exhibited by many previously known film-forming systems based on multi-polymer particles, especially in the presence of co-solvents, may be overcome by preparing the particles in the presence of a stabilizing compound which is an amphipathic compound with a hydrophilic-lipophilic balance (HLB) value of at least 8 and whose lipophilic portion comprises at least one ethylenic double bond. The dispersions of this invention are useful as the film-forming components of coating compositions.
Inventors
- 👤 David V. Gibson
- 👤 Rodney W. Parr
- 👤 John E. Swalwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
C; C08; C08F; C08F283/00; C08F2/00; C08F2/12; C08F2/16; C08F2/22; C08F2/24; C08F2/26; C08F2/44; C09; C09D; C09D167/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A process of preparing an aqueous dispersion of film-forming polymer wherein pre-formed polymer, unsaturated monomer and water are mixed so as to form a dispersion of particles wherein the individual particles comprise a blend of pre-formed polymer and monomer and are stabilized by the presence of a stabilizing compound, and the monomer is polymerised to give an aqueous dispersion of particles wherein each particle comprises a blend of pre-formed polymer and polymer formed in situ from the monomer, characterised in that the stabilizing compound is an amphipathic compound with an H.L.B. value of at least 8, that portion of the compound which is lipophilic comprising at least one ethylenic double bond.
Claim 2
Dependent Claim
111 words
A process of preparing an aqueous dispersion of film-forming polymer wherein pre-formed polymer, unsaturated monomer and water are mixed so as to form a dispersion of particles wherein the individual particles comprise a blend of pre-formed polymer and monomer and are stabilized by the presence of a stabilizing compound, and the monomer is polymerised to give an aqueous dispersion of particles wherein each particle comprises a blend of pre-formed polymer and polymer formed in situ from the monomer, characterised in that the stabilizing compound is an amphipathic compound with an H.L.B. value of at least 8, that portion of the compound which is lipophilic comprising at least one ethylenic double bond.
Claim 3
Dependent Claim
22 words
A process according to claim 1, characterised in that the lipophilic portion comprises an entity selected from cinnamyl alcohol and norborene methanol.
Claim 4
Dependent Claim
42 words
A process according to claim 1, characterised in that the lipophilic portion of the stabilizing compound comprises at least one ethylenic double bond of the formula CH.sub.2 =CR-- where R is selected from hydrogen and a C 1 -C 4 alkyl group.
Claim 5
Dependent Claim
30 words
A process according to claim 1, characterised in that at least one double bond is derived from an entity selected from the group consisting of an acrylate and a methacrylate.
Claim 6
Dependent Claim
17 words
A process according to claim 1, characterised in that at least one ethylenic double bond is allylic.
Claim 7
Dependent Claim
54 words
A process according to claim 5, characterised in that at least one double bond is derived from a compound selected from the group consisting of allyl alcohol, methallyl alcohol, pentaerythritol triallyl ether, trimethylolpropane diallyl ether, undecylenic acid, eugenol and the reaction product of 1 mole of 2,2-bis(4-hydroxyphenol)propane with two moles of allyl glycidyl ether.
Claim 8
Dependent Claim
16 words
A process according to claim 1, characterised in that at least one pre-formed polymer is thermoplastic.
Claim 9
Dependent Claim
16 words
A process according to claim 1, characterised in that at least one pre-formed polymer is convertible.
Claim 10
Dependent Claim
16 words
A process according to claim 8, characterised in that at least one pre-formed polymer is autoxidisable.
Claim 11
Dependent Claim
17 words
A process according to claim 9, characterised in that at least one pre-formed polymer comprises allyloxy groups.
Claim 12
Dependent Claim
27 words
A process according to claim 1, characterised in that the pre-formed polymer comprises from 2-98% by weight of the combined weights of pre-formed polymer and unsaturated monomer.
Claim 13
Dependent Claim
27 words
A process according to claim 10, characterised in that the pre-formed polymer comprises from 20-80% by weight of the combined weights of pre-formed polymer and unsaturated monomer.
Claim 14
Dependent Claim
31 words
A process according to claim 1, characterised in that the stabilising compound is present to the extent of from 1-20% by weight of the combined weights of pre-formed polymer and monomer.
Claim 15
Dependent Claim
94 words
An aqueous dispersion of film-forming polymer wherein the disperse particles of polymer comprise a blend of pre-formed polymer and polymer formed in situ, and are stabilised by the presence of a stabilising compound, prepared by mixing pre-formed polymer, unsaturated monomer, stabilising compound and water to give an aqueous dispersion of particles of a blend of pre-formed polymer and monomer, and polymerising the monomer, characterised in that the stabilising compound has a hydrophilic-lipophilic balance (HLB value) of at least 8, that portion of the compound which is lipophilic comprising at least one ethylenic double bond.
Claim 16
Dependent Claim
94 words
An aqueous dispersion of film-forming polymer wherein the disperse particles of polymer comprise a blend of pre-formed polymer and polymer formed in situ, and are stabilised by the presence of a stabilising compound, prepared by mixing pre-formed polymer, unsaturated monomer, stabilising compound and water to give an aqueous dispersion of particles of a blend of pre-formed polymer and monomer, and polymerising the monomer, characterised in that the stabilising compound has a hydrophilic-lipophilic balance (HLB value) of at least 8, that portion of the compound which is lipophilic comprising at least one ethylenic double bond.
References Cited (Backward Citations)
GB1255527A
Cited
US3620989A
Cited
US3686114A
Cited
GB1417713A
Cited
GB1421114A
Cited
US3878148A
Cited
US3981895A
Cited
GB1515713A
Cited
US4151148A
Cited
US4092470A
Cited
US4153770A
Cited
US4156667A
Cited
US4296014A
Cited
GB2038846B
Cited
US4287329A
Cited
US4229547A
Cited
US4373054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-31 | 1987-05-02 | 1987-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-31 | 1991-05-02 | 1991-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-31 | 1995-05-02 | 1995-11-01 | $7700.00 | Window Closed / Lapsed |