US4504318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing plastic concrete
Assignee: National House Industrial Co Ltd
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Filing: 1983-10-31
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Granted: 1985-03-12
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Expires: 2003-10-31
Abstract
Abstract A light-weight high-strength plastic concrete is produced by forming a water-in-oil type inverted emulsion from a cement slurry, vinyl monomers, and a polyalkylene glycol derivative having terminal carboxyl groups, said polyalkylene glycol being an addition product of a polyalkylene glycol shown by the following general formula and a dibasic acid anhydride <IMAGE> wherein R represents an alkyl group having one or more alkyl group and polymerizing and hardening the inverted emulsion and drying it.
Inventors
- 👤 Hideaki Matsuda
- 👤 Takasi Saheki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C08; C08F; C08F283/00; C08F283/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
82 words
A process of producing a plastic concrete which comprises forming a water-in-oil inverted emulsion of vinyl monomers in the presence of a polyalkylene glycol derivative having terminal carboxyl groups, which is an addition product of a polyalkylene glycol represented by the following general formula and a dibasic acid anhydride ##STR3## wherein R represents an alkyl group having one or more carbon atoms and a cement slurry and polymerizing the inverted emulsion in the presence of a polymerization catalyst while hardening the cement.
Claim 2
Dependent Claim
82 words
A process of producing a plastic concrete which comprises forming a water-in-oil inverted emulsion of vinyl monomers in the presence of a polyalkylene glycol derivative having terminal carboxyl groups, which is an addition product of a polyalkylene glycol represented by the following general formula and a dibasic acid anhydride ##STR3## wherein R represents an alkyl group having one or more carbon atoms and a cement slurry and polymerizing the inverted emulsion in the presence of a polymerization catalyst while hardening the cement.
Claim 3
Dependent Claim
42 words
The process as claimed in claim 1 wherein the polyalkylene glycol shown by the general formula, which combines with the dibasic acid anhydride by an ester bond, is polypropylene glycol or polybutylene glycol having a mean molecular weight of 2,000 to 5,000.
Claim 4
Dependent Claim
36 words
The process as claimed in claim 1 wherein the dibasic acid anhydride which combines with the hydroxy group of the polyalkylene glycol of the general formula by an ester bond is maleic anhydride or succinic anhydride.
Claim 5
Dependent Claim
22 words
The process as claimed in claim 1 wherein the vinyl monomer is styrene, methyl methacrylate, acrylonitrile, trimethylolpropane trimethacrylate, or ethylene glycol dimethacrylate.
Claim 6
Dependent Claim
51 words
The process as claimed in claim 1 wherein the mixing ratio of the vinyl monomer and the polyalkylene glycol derivative derived from the polyalkylene glycol shown by the general formula and the dibasic acid anhydride is 1 to 50 parts by weight per 100 parts by weight of the vinyl monomers.
Claim 7
Dependent Claim
27 words
The process as claimed in claim 5 wherein the mixing ratio is 3 to 30 parts by weight per 100 parts by weight of the vinyl monomers.
Claim 8
Dependent Claim
28 words
The process as claimed in claim 1 wherein the polymerization catalyst is cobalt naphthenate, vanadyl acetylacetonate, benzoyl peroxide, cumene hydroperoxide, methyl ethyl ketone peroxide or a mixture thereof.
Claim 9
Dependent Claim
31 words
The process as claimed in claim 1 wherein crushed stone, river sand, perlite, glass fibers, metal fibers, or synthetic fibers are added at the formation of the water-in-oil type inverted emulsion.
Claim 10
Dependent Claim
30 words
The process as claimed in claim 1 wherein a part of cement in the cement slurry is replaced with aluminium hydroxide at the formation of the water-in-oil type inverted emulsion.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |