US3635752A
Expired / Lapsed
US
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Process for the preparation of glass-concentrate capsules in a polyvinyl chloride matrix
Assignee: Monsanto Co
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Filing: 1969-11-04
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Granted: 1972-01-18
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Expires: 1989-11-04
Abstract
Abstract Disclosed herein is a process for the preparation of glassconcentrate capsules which comprise a plurality of strands of glass fibers encapsulated in a collimated array within a vinyl chloride polymer matrix which process comprises: 1. Forming a suspension of strands of glass fibers in a vinyl chloride monomer/water mixture containing a critical amount (viz., from 0.05 to 2.0 percent by weight based on the total weight of monomer and glass) of protective colloid; 2. Agitating the suspension using a low-shear type of agitation which moves the whole suspension pass while avoiding localized high-shear agitation; 3. Polymerizing the monomer; and 4. Recovering the glass-concentrate capsules.
Inventors
- 👤 Massimo Baer
- 👤 Joseph O Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:52
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/44; B; B29; B29B; B29B9/00; B29B9/12; B29B9/14; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; B29C70/14; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2989
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
38 words
FORMING A SUSPENSION OF STRANDS OF GLASS FIBERS IN A VINYL CHLORIDE MONOMER/WATER MIXTURE CONTAINING A CRITICAL AMOUNT (VIZ., FROM 0.05 TO 2.0 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF MONOMER AND GLASS) OF PROTECTIVE COLLOID;
Claim 2
Dependent Claim
38 words
FORMING A SUSPENSION OF STRANDS OF GLASS FIBERS IN A VINYL CHLORIDE MONOMER/WATER MIXTURE CONTAINING A CRITICAL AMOUNT (VIZ., FROM 0.05 TO 2.0 PERCENT BY WEIGHT BASED ON THE TOTAL WEIGHT OF MONOMER AND GLASS) OF PROTECTIVE COLLOID;
Claim 3
Dependent Claim
20 words
AGITATING THE SUSPENSION USING A LOW-SHEAR TYPE OF AGITATION WHICH MOVES THE WHOLE SUSPENSION PASS WHILE AVOIDING LOCALIZED HIGH-SHEAR AGITATION;
Claim 4
Dependent Claim
20 words
AGITATING THE SUSPENSION USING A LOW-SHEAR TYPE OF AGITATION WHICH MOVES THE WHOLE SUSPENSION PASS WHILE AVOIDING LOCALIZED HIGH-SHEAR AGITATION;
Claim 5
Dependent Claim
17 words
A process as in claim 1 wherein the glass strands are from 1/8 to 1/4 -inch long.
Claim 6
Dependent Claim
18 words
A process as in claim 1 wherein the monomer is a mixture of vinyl chloride and vinyl acetate.
Claim 7
Dependent Claim
4 words
POLYMERIZING THE MONOMER; AND
Claim 8
Dependent Claim
4 words
POLYMERIZING THE MONOMER; AND
Claim 9
Dependent Claim
4 words
RECOVERING THE GLASS-CONCENTRATE CAPSULES.
Claim 10
Dependent Claim
4 words
RECOVERING THE GLASS-CONCENTRATE CAPSULES.
Claim 11
Dependent Claim
14 words
A process as in claim 1 wherein the suspension is agitated by tumbling end-over-end.
Claim 12
Dependent Claim
126 words
A process for the preparation of glass-concentrate capsules, which comprises a plurality of strands of glass fibers encapsulated in a collimated array within a vinyl chloride polymer matrix, which process comprises: A. Forming a suspension of strands of glass fibers having a length of from 1/32 to 3/4 inch in a vinyl chloride monomer/water mixture containing from 0.05 to 2.0 percent by weight, based on the total weight of monomer and glass, of a protective colloid selected from the group consisting of interpolymers of acrylic acid and 2-ethylhexyl acrylate, methyl cellulose and polyvinyl alcohol; B. agitating the suspension using a low-shear type of agitation which moves the whole suspension mass while avoiding localized high-shear agitation; C. polymerizing the monomer; and D. recovering the resulting concentrate capsules.
Claim 13
Dependent Claim
126 words
A process for the preparation of glass-concentrate capsules, which comprises a plurality of strands of glass fibers encapsulated in a collimated array within a vinyl chloride polymer matrix, which process comprises: A. Forming a suspension of strands of glass fibers having a length of from 1/32 to 3/4 inch in a vinyl chloride monomer/water mixture containing from 0.05 to 2.0 percent by weight, based on the total weight of monomer and glass, of a protective colloid selected from the group consisting of interpolymers of acrylic acid and 2-ethylhexyl acrylate, methyl cellulose and polyvinyl alcohol; B. agitating the suspension using a low-shear type of agitation which moves the whole suspension mass while avoiding localized high-shear agitation; C. polymerizing the monomer; and D. recovering the resulting concentrate capsules.
Claim 14
Dependent Claim
19 words
A process as in claim 5 wherein the glass strands have a length of from 1/8 to 1/4 inch.
Claim 15
Dependent Claim
18 words
A process as in claim 5 wherein the monomer is a mixture of vinyl chloride and vinyl acetate.
Claim 16
Dependent Claim
13 words
A process as in claim 5 wherein the protective colloid is methyl cellulose.
Claim 17
Dependent Claim
13 words
A process as in claim 5 wherein the protective colloid is polyvinyl alcohol.
Claim 18
Dependent Claim
135 words
A process for the preparation of glass-concentrate capsules, which comprises a plurality of strands of glass fibers encapsulated in a collimated array within a poly(vinyl chloride) matrix, which process comprises: A. Suspending from 10 to 80 parts by weight of strands of glass fibers having a length of from 1/32 to 3/4 inch in a mixture comprising from 20 to 90 parts by weight of vinyl chloride and from 100 to 1,600 parts by weight of water, based on 100 parts by weight total of glass and monomer, wherein the water contains of from 0.05 to 2.0 parts by weight, based on 100 parts by weight total of glass and monomer, of methyl cellulose; B. Agitating the suspension by tumbling the suspension mass end-over-end; C. Polymerizing the monomer; and D. Recovering the resulting glass-concentrate capsules.
Claim 19
Dependent Claim
135 words
A process for the preparation of glass-concentrate capsules, which comprises a plurality of strands of glass fibers encapsulated in a collimated array within a poly(vinyl chloride) matrix, which process comprises: A. Suspending from 10 to 80 parts by weight of strands of glass fibers having a length of from 1/32 to 3/4 inch in a mixture comprising from 20 to 90 parts by weight of vinyl chloride and from 100 to 1,600 parts by weight of water, based on 100 parts by weight total of glass and monomer, wherein the water contains of from 0.05 to 2.0 parts by weight, based on 100 parts by weight total of glass and monomer, of methyl cellulose; B. Agitating the suspension by tumbling the suspension mass end-over-end; C. Polymerizing the monomer; and D. Recovering the resulting glass-concentrate capsules.
Claim 20
Dependent Claim
21 words
A process as in claim 10 wherein the glass strands have a length of from about 1/8 to about 1/4 inch.
Claim 21
Dependent Claim
36 words
A process as in claim 10 wherein the amount of monomer is in the range of from 30 to 80 parts and the amount of water is in the range of from 100 to 600 parts.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |