US5169441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cationic dispersion and process for cationizing finely divided particulate matter
Assignee: Hercules LLC
•
Filing: 1990-12-17
•
Granted: 1992-12-08
•
Expires: 2010-12-17
Abstract
Abstract Fillers and pigments, such as clay, titanium dioxide, calcium carbonate, silicas, and silicoaluminates, can be rendered cationic by treating the fillers or pigments with the reaction product of a polyamine or polyamide and epichlorohydrin. The resulting water soluble cationic fillers or pigments are useful in the paper industry as fillers for paper and can also be utilized in coating paper.
Inventors
- 👤 Rodrigue V. Lauzon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:36
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/41; D21H17/44; D21H19/00; D21H19/36; D21H19/38; D21H17/46; D21H17/54; D21H17/55; D21H17/63; D21H17/67; D21H17/675; D21H17/68; D21H17/69
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
158 words
A cationic filler or pigment dispersion comprising (a) a filler or pigment selected from the group consisting of kaolins, bentonites, titanium dioxide, calcium carbonate, synthetic amorphous silicas and synthetic amorphous silicoaluminates, and (b) a water soluble cationic polymer having from 30 to 80% cyclic quaternary groups selected from the group consisting of four membered cyclic quaternary azetidinium ions containing the structure ##STR3## where R 1 and R 2 are residues of the polymer chain, and five membered cyclic quaternary ions having the structure ##STR4## where R is a C 1 to C 5 alkyl group, said cationic polymers containing four membered cyclic azetidinium ions being prepared by reacting epichlorohydrin with a compound selected from the group consisting of i) a polyalkylenepolyamine, ii) an aminopolyamide derived from adipic acid and diethylenetriamine, and iii) the condensate derived from reaction of diethylenetriamine with cyanoquanidine, and said cationic polymers containing five membered cyclic quaternary ions being prepared by reacting epichlorohydrin with methyldiallylamine.
Claim 2
Dependent Claim
158 words
A cationic filler or pigment dispersion comprising (a) a filler or pigment selected from the group consisting of kaolins, bentonites, titanium dioxide, calcium carbonate, synthetic amorphous silicas and synthetic amorphous silicoaluminates, and (b) a water soluble cationic polymer having from 30 to 80% cyclic quaternary groups selected from the group consisting of four membered cyclic quaternary azetidinium ions containing the structure ##STR3## where R 1 and R 2 are residues of the polymer chain, and five membered cyclic quaternary ions having the structure ##STR4## where R is a C 1 to C 5 alkyl group, said cationic polymers containing four membered cyclic azetidinium ions being prepared by reacting epichlorohydrin with a compound selected from the group consisting of i) a polyalkylenepolyamine, ii) an aminopolyamide derived from adipic acid and diethylenetriamine, and iii) the condensate derived from reaction of diethylenetriamine with cyanoquanidine, and said cationic polymers containing five membered cyclic quaternary ions being prepared by reacting epichlorohydrin with methyldiallylamine.
Claim 3
Dependent Claim
24 words
A dispersion as described in claim 1 wherein said five membered cyclic quaternary ion contains a C 1 -C 3 alkyl group for R.
Claim 4
Dependent Claim
38 words
A dispersion as described in claim 2 wherein said water soluble cationic polymer comprises the reaction product of epichlorohydrin with a polymer having from 50 to 80% cyclic quaternary groups, selected from the group described in claim 1.
Claim 5
Dependent Claim
42 words
A dispersion as described in claim 3 wherein said dispersion is about 20 to 60 wt. % solids of said filler or pigment and about 0.1 to 8 wt. % of said water soluble cationic polymer based on the pigment or filler.
Claim 6
Dependent Claim
12 words
A dispersion as described in claim 4 wherein said clay is kaolin.
Claim 7
Dependent Claim
12 words
A dispersion as described in claim 4 wherein said clay is bentonite.
Claim 8
Dependent Claim
34 words
A dispersion as described in claim 4 wherein said water soluble cationic polymer comprises the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 9
Dependent Claim
21 words
A dispersion as described in claim 4 wherein said water soluble cationic polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 10
Dependent Claim
33 words
A dispersion as described in claim 6 wherein said water soluble cationic polymer comprises the reaction product BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 11
Dependent Claim
21 words
A dispersion as described in claim 6 wherein said water soluble cationic polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 12
Dependent Claim
88 words
A cationic filler or pigment dispersion comprising (a) about 20 to 60 wt. % solids of a filler or pigment selected from the group consisting of kaolins, bentonites, titanium dioxide, calcium carbonate, synthetic amorphous silicas and synthetic amorphous silicoaluminates, and (b) about 0.1 to 8 wt. % based on filler or pigment of a water soluble cationic polymer comprising the reaction product of epichlorohydrin and an amine selected from the group consisting of BHMT and methyl diallylamine wherein said amine comprises about 50 to 80% cyclic quaternary groups.
Claim 13
Dependent Claim
88 words
A cationic filler or pigment dispersion comprising (a) about 20 to 60 wt. % solids of a filler or pigment selected from the group consisting of kaolins, bentonites, titanium dioxide, calcium carbonate, synthetic amorphous silicas and synthetic amorphous silicoaluminates, and (b) about 0.1 to 8 wt. % based on filler or pigment of a water soluble cationic polymer comprising the reaction product of epichlorohydrin and an amine selected from the group consisting of BHMT and methyl diallylamine wherein said amine comprises about 50 to 80% cyclic quaternary groups.
Claim 14
Dependent Claim
22 words
A cationic filler or pigment dispersion as described in claim 11 wherein said filler or pigment comprises a colloidal aluminum silicate clay.
Claim 15
Dependent Claim
12 words
A dispersion as described in claim 12 wherein said clay is kaolin.
Claim 16
Dependent Claim
12 words
A dispersion as described in claim 12 wherein said clay is bentonite.
Claim 17
Dependent Claim
31 words
A dispersion as described in claim 12 wherein said polymer comprises the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 18
Dependent Claim
18 words
A dispersion as described in claim 12 wherein said polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 19
Dependent Claim
47 words
A dispersion as described in claim 13 wherein said polymer comprises the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1 and said polymer is resent from about 0.1 to about 6 wt. % based on clay.
Claim 20
Dependent Claim
32 words
A dispersion as described in claim 13 wherein said polymer comprises the reaction product of methyldiallylamine and epichlorohydrin and is present from about 0.1 to about 4 wt. % based on clay.
Claim 21
Dependent Claim
31 words
A dispersion as described in claim 14 wherein said polymer comprises the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 22
Dependent Claim
18 words
A dispersion as described in claim 14 wherein said polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 23
Dependent Claim
17 words
A cationic filler or pigment dispersion as described in claim 11 wherein said pigment comprises titanium dioxide.
Claim 24
Dependent Claim
41 words
A dispersion as described in claim 21 wherein said polymer comprises about 0.1 to 2 wt. % based on pigment of the reaction product of BMHT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 25
Dependent Claim
28 words
A dispersion as described in claim 21 wherein said polymer comprises about 0.2 to 5 wt. % based on pigment of the reaction product of methyldiallylamine and epichlorohydrin.
Claim 26
Dependent Claim
17 words
A cationic filler or pigment dispersion as described in claim 11 wherein said filler comprises calcium carbonate.
Claim 27
Dependent Claim
41 words
A dispersion as described in claim 24 wherein said polymer comprises about 0.4 to 8 wt. % based on filler of the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 28
Dependent Claim
18 words
A dispersion as described in claim 24 wherein said polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 29
Dependent Claim
24 words
A cationic filler or pigment dispersion as described in claim 11 wherein said filler is selected from the group consisting of silicas and silicoaluminates.
Claim 30
Dependent Claim
41 words
A dispersion as described in claim 27 wherein said polymer comprises about 0.2 to 2 wt. % based on filler of the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 31
Dependent Claim
18 words
A dispersion as described in claim 27 wherein said polymer comprises the reaction product of methyldiallylamine and epichlorohydrin.
Claim 32
Dependent Claim
102 words
A process for cationizing fillers or pigments for use in papermaking processes comprising adding an effective amount of water soluble cationic polymer comprising the reaction product of epichlorohydrin with a compound selected from the group consisting of four membered cyclic quaternary azetidinium ions containing the structures ##STR5## where R 1 and R 2 are residues of the polymer chain, and five membered cyclic quaternary ions having the structure ##STR6## where R is a C 1 to C 5 alkyl group; to a filler or pigment selected from the group consisting of kaolin, bentonite, titanium dioxide, calcium carbonate, synthetic amorphous silicas and silicoaluminates.
Claim 33
Dependent Claim
102 words
A process for cationizing fillers or pigments for use in papermaking processes comprising adding an effective amount of water soluble cationic polymer comprising the reaction product of epichlorohydrin with a compound selected from the group consisting of four membered cyclic quaternary azetidinium ions containing the structures ##STR5## where R 1 and R 2 are residues of the polymer chain, and five membered cyclic quaternary ions having the structure ##STR6## where R is a C 1 to C 5 alkyl group; to a filler or pigment selected from the group consisting of kaolin, bentonite, titanium dioxide, calcium carbonate, synthetic amorphous silicas and silicoaluminates.
Claim 34
Dependent Claim
24 words
A process as described in claim 30 wherein said five membered cyclic quaternary ion contains a C 1 -C 3 alkyl group for R.
Claim 35
Dependent Claim
74 words
A process as described in claim 31 comprising adding an effective amount of a water soluble cationic polymer selected from the group consisting of the reaction product BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1 and the reaction product of methyldiallylamine and epichlorohydrin copolymer to a filler or pigment selected from the group consisting of kaolin, bentonite, titanium dioxide, calcium carbonate, synthetic amorphous silicas and silicoaluminates.
Claim 36
Dependent Claim
29 words
A process as described in claim 32 wherein about 0.1 to 8 wt. % based on filler or pigment of said polymer is added to the filler or pigment.
Claim 37
Dependent Claim
50 words
A process as described in claim 33 comprising adding about 0.1 to 6 wt % based on filler of said water soluble cationic polymer comprising the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1 to a kaolin clay filler.
Claim 38
Dependent Claim
12 words
A process as described in claim 34 wherein said filler is bentonite.
Claim 39
Dependent Claim
35 words
A process as described in claim 33 comprising adding about 0.1 to 4 wt. % based on filler of said water soluble cationic polymer comprising the reaction product of methyldiallylamine and epichlorohydrin to kaolin clay.
Claim 40
Dependent Claim
12 words
A process as described in claim 36 wherein said filler is bentonite.
Claim 41
Dependent Claim
42 words
A process as described in claim 33 comprising adding about 0.1 to 2 wt. % based on pigment of the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1 to titanium dioxide.
Claim 42
Dependent Claim
27 words
A process as described in claim 33 comprising adding about 0.2 to 5 wt. % based on calcium carbonate of the reaction product of methyldiallylamine and epichlorohydrin.
Claim 43
Dependent Claim
21 words
A process as described in claim 33 comprising adding the reaction product of methyldiallylamine and epichlorohydrin to a calcium carbonate filler.
Claim 44
Dependent Claim
40 words
A process as described in claim 40 comprising adding about 0.4 to 8 wt. % based on calcium carbonate of the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
Claim 45
Dependent Claim
28 words
A process as described in claim 33 comprising adding the reaction product of methyldiallylamine and epichlorohydrin to a filler selected from the group consisting of silicas and silicoaluminates.
Claim 46
Dependent Claim
39 words
A process as described in claim 42 comprising adding about 0.2 to 2 wt. % based on filler of the reaction product of BHMT and epichlorohydrin in which the ratio of epichlorohydrin to BHMT is from 2.5/1 to 7.5/1.
References Cited (Backward Citations)
US3804656A
Cited
US4294885A
Cited
US4874466A
Cited
US4801403A
Cited
EP0382427A2
Cited
US5006574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-08 | 1996-06-08 | 1996-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-08 | 2000-06-08 | 2000-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-08 | 2004-06-08 | 2004-12-08 | $7700.00 | Window Closed / Lapsed |