US4089832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-containing plastic composition
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1974-09-17
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Granted: 1978-05-16
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Expires: 1994-09-17
Abstract
Abstract A water-containing plastic composition which comprises (a) 10-90 wt. % of water-containing powdery gel obtained by subjecting at least one water-soluble polymer such as polyvinyl alcohol, polyacrylamide, polyvinylpyrrolidone or poly(hydroxyalkyl acrylate), while it is in the state of an aqueous solution, to crosslinking reaction and then pulverizing the crosslinked product and (b) 90-10 wt. % of at least one plastic substance selected from thermoplastic and thermohardenable plastics. The water-containing plastic composition is suitable as a material for manufacturing poorly combustible molding materials.
Inventors
- 👤 Aizo Yamauchi
- 👤 Yasushi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:44
CPC Classifications
C; C08; C08L; C08L57/00; C08L101/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
A method of making a solid water-containing plastic compositon which comprises mixing about 10-90 wt. % of particles of a gel of a cross-linked, water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 relative to such polymer, with about 90-10 wt. % of a thermoplastic or thermohardenable plastic in fluent form, molding said mixture to a desired shape, and hardening said plastic while the mixture retains said shape.
Claim 2
Independent Claim
77 words
A method of making a solid water-containing plastic compositon which comprises mixing about 10-90 wt. % of particles of a gel of a cross-linked, water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 relative to such polymer, with about 90-10 wt. % of a thermoplastic or thermohardenable plastic in fluent form, molding said mixture to a desired shape, and hardening said plastic while the mixture retains said shape.
Claim 3
Independent Claim
74 words
A method of making a solid water-containing plastic composition which comprises mixing about 10-90 wt. % of particles of a gel of a cross-linked, water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 relative to such polymer, with about 90-10wt. % of a polymerizable vinyl monomer, molding said mixture to a desired shape, and initiating polymerization of said monomer while the mixture retains said shape.
Claim 4
Independent Claim
74 words
A method of making a solid water-containing plastic composition which comprises mixing about 10-90 wt. % of particles of a gel of a cross-linked, water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 relative to such polymer, with about 90-10wt. % of a polymerizable vinyl monomer, molding said mixture to a desired shape, and initiating polymerization of said monomer while the mixture retains said shape.
Claim 5
Independent Claim
64 words
A method of preparing particles of a water-containing polymer gel which comprises forming an aqueous solution of a water-soluble polymer of an α,β-ethylenically unsaturated monomer in a weight ratio of water to polymer of about 1-10:1, emulsifying said aqueous polymer solution in a water-immiscible medium, and while the aqueous polymer solution is so emulsified subjecting the same to a cross-linking to gel the same.
Claim 6
Independent Claim
64 words
A method of preparing particles of a water-containing polymer gel which comprises forming an aqueous solution of a water-soluble polymer of an α,β-ethylenically unsaturated monomer in a weight ratio of water to polymer of about 1-10:1, emulsifying said aqueous polymer solution in a water-immiscible medium, and while the aqueous polymer solution is so emulsified subjecting the same to a cross-linking to gel the same.
Claim 7
Independent Claim
60 words
A method of preparing particles of a water-containing gel which comprises forming an aqueous solution of a water-soluble polymer of an α,β-ethylenically unsaturated monomer in a weight ratio of water to polymer of about 1-10:1, subjecting a body of the resultant polymer solution to a cross-linking reaction to gel the same, and then pulverizing the thus formed gel into particles.
Claim 8
Independent Claim
60 words
A method of preparing particles of a water-containing gel which comprises forming an aqueous solution of a water-soluble polymer of an α,β-ethylenically unsaturated monomer in a weight ratio of water to polymer of about 1-10:1, subjecting a body of the resultant polymer solution to a cross-linking reaction to gel the same, and then pulverizing the thus formed gel into particles.
Claim 9
Dependent Claim
76 words
A solid water-containing plastic composition comprising a solid matrix of about 10-90 wt. % of a thermoplastic or thermohardenable plastic, and uniformly distributed through said matrix about 90-10 wt. % of particles of the composite consisting essentially of a gel of a cross-linked normally water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 with respect to such polymer and having a particle size of about 0.1-5 mm.
Claim 10
Dependent Claim
76 words
A solid water-containing plastic composition comprising a solid matrix of about 10-90 wt. % of a thermoplastic or thermohardenable plastic, and uniformly distributed through said matrix about 90-10 wt. % of particles of the composite consisting essentially of a gel of a cross-linked normally water-soluble polymer of an α,β-ethylenically unsaturated monomer having water entrained therein in a weight ratio of about 1-10:1 with respect to such polymer and having a particle size of about 0.1-5 mm.
Claim 11
Dependent Claim
25 words
A composition according to claim 5 wherein said water-soluble polymer is at least partially saponified polyvinyl alcohol and said matrix plastic is a styrene polymer.
Claim 12
Dependent Claim
34 words
A composition according to claim 5 wherein said water-soluble polymer is at least one selected from the group consisting of at least partially saponified polyvinyl alcohol, polyacrylamide, polymethacrylamide, polyvinylpyrrolidone, poly(hydroxyalkyl acrylate) and poly(hydroxyalkyl methacrylate).
Claim 13
Dependent Claim
26 words
A composition according to claim 5 wherein said plastic substance is at least one selected from the group consisting of polyethylene, polypropylene, polystyrene and poly(methyl methacrylate).
Claim 14
Dependent Claim
33 words
A composition according to claim 5 wherein said water-containing gel is prepared by dispersing an aqueous solution of a water-soluble polymer into a water-immiscible medium and irradiating the dispersion with an ionizing ray.
Claim 15
Dependent Claim
21 words
A composition according to claim 9 wherein said aqueous solution of a water-soluble polymer is an aqueous solution of polyvinyl alcohol.
Claim 16
Dependent Claim
14 words
A composition according to claim 9 wherein said water-immiscible medium is toluene or kerosene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |