US3627713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preventing agglomeration of powdered urea-formaldehyde resins
Assignee: Kao Corp
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Filing: 1968-10-02
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Granted: 1971-12-14
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Expires: 1988-10-02
Abstract
Abstract A method of preventing agglomeration of powdered ureaformaldehyde resins which comprises incorporating therein an antiagglomerating agent comprising a nondissociative watersoluble macromolecular compound and a surface active agent.
Inventors
- 👤 Iwao Maruta
- 👤 Akihiko Iida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:54
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J2361/00; C08J2361/20; C08J2361/22; C08J2361/24; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
31 words
The method according to claim 1 in which the aqueous mixed solution contains from 0.1 percent to 20 percent by weight of the macromolecular compound and the organic surface active agent.
Claim 2
Dependent Claim
19 words
The method according to claim 1, in which said aqueous mixed solution is applied to said resin by spraying.
Claim 3
Dependent Claim
18 words
The method according to claim 1, in which said powdered urea-formaldehyde resin is a molding urea resin compound.
Claim 4
Dependent Claim
52 words
A method according to claim 1, in which the ratio by weight of the surface active agent to the nondissociative water-soluble macromolecular compound is in the range of 8 to 6 parts by weight of the surface active agent to 2 to 4 parts by weight of the nondissociative water-soluble macromolecular compound.
Claim 5
Dependent Claim
43 words
A method according to claim 1, in which the sum of said surface active agent and said nondissociative water-soluble macromolecular compound, calculated as the solids, added to said resin powder is from 0.05 percent to 0.5 percent by weight of the resin powder.
Claim 6
Dependent Claim
135 words
A moldable plastic material, comprising discrete particles of urea-formaldehyde resin coated with from about 0.005 percent to 2.0 percent by weight, based on the weight of the resin, of a dry antiagglomerating agent consisting of a mixture of (1) a nondissociative water-soluble macromolecular compound and (2) an organic surface active agent, said surface active agent being selected from the group consisting of anionic, nonionic, cationic and amphoteric organic surface active agents, said nondissociative water-soluble macromolecular compound being selected from the group consisting of water-soluble polyvinyl alcohols, polyvinyl pyrrolidones, polyvinyl methylethers, polyvinyl oxazolidinones, water-soluble partially saponified polyvinyl acetates, partially aceylated polyvinyl alcohols, partially acetalized polyvinyl alcohols, polyvinyl acrylamides and methyl celluloses, the ratio of said nondissociative water-soluble macromolecular compound to said surface active agent, in said antiagglomerating agent, being from 1:10 to 10:1 parts by weight.
Claim 7
Dependent Claim
30 words
A moldable plastic material according to claim 7, in which the urea-formaldehyde resin particles are coated with from about 0.05 percent to 0.5 percent by weight of the antiagglomerating agent.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |