US3968005A
Expired / Lapsed
US
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Paper sizing process using a reaction product of maleic anhydride with a vinylidene olefin
Assignee: Ingredion Inc
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Filing: 1975-04-21
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Granted: 1976-07-06
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Expires: 1995-04-21
Abstract
Abstract A process of sizing paper with a reaction product of maleic anhydride with a vinylidene olefin.
Inventors
- 👤 Otto B. Wurzburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:55
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/14; D21H17/15; D21H17/16
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
66 words
The method of sizing paper which comprises the step of intimately dispersing within the wet pulp, prior to the ultimate conversion of said pulp into a dry web, a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU4## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical.
Claim 2
Independent Claim
66 words
The method of sizing paper which comprises the step of intimately dispersing within the wet pulp, prior to the ultimate conversion of said pulp into a dry web, a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU4## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical.
Claim 3
Dependent Claim
18 words
The method of claim 1 in which the sizing agent is in the form of an aqueous emulsion.
Claim 4
Dependent Claim
57 words
A paper product having intimately dispersed within the wet pulp thereof, prior to its conversion into a dry web, a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU5## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical.
Claim 5
Dependent Claim
57 words
A paper product having intimately dispersed within the wet pulp thereof, prior to its conversion into a dry web, a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU5## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical.
Claim 6
Dependent Claim
74 words
A paper product having intimately dispersed within the wet pulp thereof, prior to its conversion into a dry web, (a) a sizing agent which comprises the non-polymeric reaction product of maleic anhydride with a vinylidene olefin corresponding to ##EQU6## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical, and (b) at least 0.025%, based on the dry weight of the pulp, of a cationic agent.
Claim 7
Dependent Claim
74 words
A paper product having intimately dispersed within the wet pulp thereof, prior to its conversion into a dry web, (a) a sizing agent which comprises the non-polymeric reaction product of maleic anhydride with a vinylidene olefin corresponding to ##EQU6## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical, and (b) at least 0.025%, based on the dry weight of the pulp, of a cationic agent.
Claim 8
Dependent Claim
37 words
The paper product of claim 4, in which said cationic agent is selected from the group consisting of alum, aluminum chloride, long chain fatty amines, substituted polyacrylamide, animal glue, polyamide polymers, cationic resins and cationic starch derivatives.
Claim 9
Independent Claim
84 words
The method of sizing paper which comprises the steps of intimately dispersing within the wet pulp, prior to the ultimate conversion of said pulp into a dry web, (a) a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU7## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical, and (b) at least 0.025%, based on the weight of the dry pulp, of a cationic agent.
Claim 10
Independent Claim
84 words
The method of sizing paper which comprises the steps of intimately dispersing within the wet pulp, prior to the ultimate conversion of said pulp into a dry web, (a) a sizing agent which comprises the non-polymeric reaction product of maleic acid anhydride with a vinylidene olefin corresponding to ##EQU7## wherein R x and R y are alkyl radicals containing at least 5 carbon atoms in each radical, and (b) at least 0.025%, based on the weight of the dry pulp, of a cationic agent.
Claim 11
Dependent Claim
36 words
The method of claim 6, in which said cationic agent is selected from the group consisting of alum, aluminum chloride, long chain fatty amines, substituted polyacrylamide, animal glue, polyamide polymers, cationic resins and cationic starch derivatives.
Claim 12
Dependent Claim
24 words
The method of claim 6, in which the sizing agent has been emulsified with a surfactant prior to its dispersion within the wet pulp.
Claim 13
Dependent Claim
28 words
The method of claim 6, in which the sizing agent is the reaction product of maleic acid anhydride with a mixture of vinylidene olefins of 16-20 carbon atoms.
References Cited (Backward Citations)
US3821069A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |