Patent US4097963A successfully refreshed from Google Patents.
US4097963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaped article comprising cellulose hydrate which is chemically modified by polyalkylene oxide containing synthetic polymers, and preparation thereof
Assignee: Hoechst AG
•
Filing: 1977-08-19
•
Granted: 1978-07-04
•
Expires: 1997-08-19
Abstract
Abstract A shaped article, especially a tube-shaped article, including a chemically modified cellulose hydrate and water which comprises: (a) a chemically modified cellulose hydrate which comprises a reaction product obtainable by reacting a cellulose derivative selected from the group consisting of a cellulose hydrate, a chemical reaction product of a cellulose hydrate with an alkylamido-bis-dimethylene-triazinone-tetramethylol, a chemical reaction product of a cellulose hydrate with an alkylamino-bis-dimethylene-triazinone-tetramethylol and mixtures thereof, with a synthetic polymer containing recurring oxyalkylene units and at least one terminal group having the formula --CH 2 --O--CO--NH--CH 2 -OH and (b) water, Is disclosed. Such articles can be prepared by treating a shaped article wherein the cellulose derivative is in the gel state with a solution of the synthetic polymer prior to drying the article under heating. Tube-shaped articles are particularly suited as sausage casings.
Inventors
- 👤 Klaus-Dieter Hammer
- 👤 Gunter Gerigk
- 👤 Lorenz Heiss
- 👤 Klaus Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:46
CPC Classifications
C; C08; C08G; C08G81/00; A; A22; A22C; A22C13/00; A22C13/0013; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C08L; C08L1/00; C08L1/02; C08L1/06; A22C2013/0096; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324
Claims Analysis
Total Claims: 61
Claim 1
Independent Claim
72 words
A shaped article comprising (a) a chemically modified cellulose hydrate obtained by reacting a cellulose derivative selected from the group consisting of cellulose hydrate, a chemical reaction product of cellulose hydrate with an alkylamido-bis-dimethylene-triazinone-tetramethylol, a chemical reaction product of cellulose hydrate with an alkylamino-bis-dimethylene-triazinone-tetramethylol and mixtures thereof, with a synthetic polymer containing recurring oxyalkylene units and at least one terminal N-methylol carbamate group having the formula --CH.sub.2 -O-CO-NH-CH.sub.2 -OH and (b) water.
Claim 2
Dependent Claim
72 words
A shaped article comprising (a) a chemically modified cellulose hydrate obtained by reacting a cellulose derivative selected from the group consisting of cellulose hydrate, a chemical reaction product of cellulose hydrate with an alkylamido-bis-dimethylene-triazinone-tetramethylol, a chemical reaction product of cellulose hydrate with an alkylamino-bis-dimethylene-triazinone-tetramethylol and mixtures thereof, with a synthetic polymer containing recurring oxyalkylene units and at least one terminal N-methylol carbamate group having the formula --CH.sub.2 -O-CO-NH-CH.sub.2 -OH and (b) water.
Claim 3
Dependent Claim
13 words
The shaped article as defined in claim 1 which further comprises a plasticizer.
Claim 4
Dependent Claim
26 words
The shaped article as defined in claim 2 wherein the synthetic polymer has a molecular weight in the range of from about 200 to about 6000.
Claim 5
Dependent Claim
22 words
The shaped article as defined in claim 2 wherein the plasticizer is selected from the group consisting of glycerine, glycol and polyglycol.
Claim 6
Dependent Claim
17 words
The shaped article as defined in claim 2 which comprises 1 to 35% by weight of plasticizer.
Claim 7
Dependent Claim
15 words
The shaped article as defined in claim 1 shaped as a film or a tube.
Claim 8
Dependent Claim
12 words
The shaped article as defined in claim 6 adapted for food packaging.
Claim 9
Dependent Claim
16 words
The shaped article as is defined in claim 7 in the form of a sausage casing.
Claim 10
Dependent Claim
27 words
The shaped article as defined in claim 1, wherein the synthetic polymer is a non-branched polyalkylene oxide polymer obtained by addition polymerization of a lower alkylene oxide.
Claim 11
Dependent Claim
26 words
The shaped article as defined in claim 9 wherein the alkylene oxide is selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.
Claim 12
Dependent Claim
24 words
The shaped article as defined in claim 1 wherein the synthetic polymer comprises two terminal N-methylol carbamate groups of the formula --CH.sub.2 -O---CO-NH-CH.sub.2 --OH.
Claim 13
Dependent Claim
26 words
The shaped article as defined in claim 11 wherein the synthetic polymer is selected from the group consisting of polyethylene glycol-200 di-N-methylol-carbamate and polyethylene glycol-1000 di-N-methylol-carbamate.
Claim 14
Dependent Claim
45 words
The shaped article as defined in claim 1 wherein the synthetic polymer comprises a copolymer obtained by addition-copolymerization of alkylene oxide and an aliphatic compound copolymerizable therewith and containing a reactive group selected from the group consisting of hydroxy, carboxy, primary amino, and secondary amino.
Claim 15
Dependent Claim
20 words
The shaped article as defined in claim 13 wherein the copolymerizable aliphatic compounds have from 2 to 8 carbon atoms.
Claim 16
Dependent Claim
19 words
The shaped article as defined in claim 13 wherein the copolymerizable aliphatic compound contains two of said reactive groups.
Claim 17
Dependent Claim
24 words
The shaped article as defined in claim 15 wherein the synthetic polymer comprises two terminal N-methylol carbamate groups of the formula --CH.sub.2 -O-CO-NH-CH.sub.2 -OH.
Claim 18
Dependent Claim
26 words
The shaped article as defined in claim 15 wherein the alkylene oxide is selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof.
Claim 19
Dependent Claim
25 words
The shaped article as defined in claim 17 wherein the copolymerizable aliphatic compound is selected from the group consisting of hexamethylene diamine, glycol and butanediol.
Claim 20
Dependent Claim
26 words
The shaped article as defined in claim 18 wherein the synthetic polymer has a molecular weight in the range of from about 800 to about 2500.
Claim 21
Dependent Claim
52 words
The shaped article as defined in claim 1 wherein the synthetic polymer comprises a copolymer obtained by addition-copolymerization of at least one alkylene oxide and at least one aromatic compound copolymerizable therewith and containing at least one reactive group selected from the group consisting of hydroxy, carboxy, primary amino, and secondary amino.
Claim 22
Dependent Claim
50 words
The shaped article as defined in claim 1 wherein the synthetic polymer comprises a copolymer obtained by addition-copolymerization of at least one alkylene oxide and an aliphatic compound copolymerizable therewith and containing at least three reactive groups selected from the group consisting of hydroxy, carboxyl, primary amino and secondary amino.
Claim 23
Dependent Claim
65 words
The shaped article as defined in claim 21 wherein the synthetic polymer comprises a polymer obtained by addition-copolymerization of alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide, and mixtures thereof, with a compound selected from the group consisting of glycerol, pentaerythritol, mannitol, sorbitol, dulcitol or sucrose, and wherein at least three terminal OH groups have been converted into N-methylol carbamate groups.
Claim 24
Dependent Claim
23 words
The shaped article as defined in claim 21 wherein the synthetic polymer has a molecular weight of between about 600 and about 1800.
Claim 25
Dependent Claim
21 words
The shaped article as defined in claim 1 wherein the water content is between about 4 and about 25% by weight.
Claim 26
Dependent Claim
18 words
The shaped article as defined in claim 1 wherein the synthetic polymer is resistent to extraction by water.
Claim 27
Dependent Claim
20 words
The shaped article as defined in claim 1 which further comprises a water impermeable polymer coating on its inner side.
Claim 28
Dependent Claim
18 words
The shaped article as defined in claim 1 which further comprises a reinforcement of a fibrous material therein.
Claim 29
Dependent Claim
71 words
A process for preparing the shaped article as defined in claim 1 which comprises the steps of (a) treating a shaped article comprising the cellulose derivative in a gel state with an aqueous solution of the synthetic polymer to incorporate into the cellulose derivative a plasticity enhancing amount of the synthetic polymer (b) heat treating the treated shaped article to obtain a dried shaped article comprising the chemically modified cellulose hydrate.
Claim 30
Dependent Claim
22 words
The process as defined in claim 28 which further comprises the step of adjusting the water content of the dried shaped article.
Claim 31
Dependent Claim
41 words
The process as defined in claim 28 which further comprises the step of introducing viscose containing solution through the shaping orifice of a die into a precipitating liquid to precipitate a shaped article comprising the cellulose derivative in a gel state.
Claim 32
Dependent Claim
37 words
The process as defined in claim 30 wherein the viscose containing solution further comprises a chemical agent which is capable of effecting chemical crosslinking of the cellulose hydrate selected from the group consisting of alkylamido-bis-dimethylene-triazinone-tetramethylol and alkylamino-bis-dimethylene-triazinone-tetramethylol.
Claim 33
Dependent Claim
32 words
The process as defined in claim 31 wherein the chemical agent which is capable of effecting chemical crosslinking of the cellulose hydrate is selected from the group consisting of stearylamido-bis-dimethylene-triazinone-tetramethylol and stearylamino-bis-dimethylene-triazinone-tetramethylol.
Claim 34
Dependent Claim
27 words
The process as defined in claim 28 which further comprises washing the precipitated shaped article prior to treating it with the aqueous solution comprising the synthetic polymer.
Claim 35
Dependent Claim
22 words
The process as defined in claim 28 which comprises adjusting the water content of the shaped article by moistening it with water.
Claim 36
Dependent Claim
26 words
The process as defined in claim 28 which comprises to impart to the shaped article a water content of between 4 and about 25% by weight.
Claim 37
Dependent Claim
23 words
The process as defined in claim 28 wherein the shaped article comprising the cellulose derivative in a gel state is a tube-shaped article.
Claim 38
Dependent Claim
19 words
The process as defined in claim 28 wherein the aqueous solution comprising the synthetic polymer further comprises a plasticizer.
Claim 39
Dependent Claim
22 words
The process as defined in claim 37 wherein the plasticizer is selected from the group consisting of glycerine and water soluble polyols.
Claim 40
Dependent Claim
22 words
The process as defined in claim 38 wherein the synthetic polymer has a molecular weight of from about 200 to about 6000.
Claim 41
Dependent Claim
24 words
The process as defined in claim 28 wherein the aqueous solution comprising the synthetic polymer further comprises a water soluble catalytically active inorganic salt.
Claim 42
Dependent Claim
23 words
The process as defined in claim 28 wherein the aqueous solution comprises between about 5 to about 30% of the synthetic polymer solution.
Claim 43
Dependent Claim
22 words
The process as defined in claim 28 wherein the pH value of the aqueous solution is between about 1 and about 5.
Claim 44
Dependent Claim
22 words
The process as defined in claim 28 wherein the aqueous solution has a temperature of between about 20° and about 90° C.
Claim 45
Dependent Claim
25 words
The process as defined in claim 28 wherein the heat treating step is effected at a temperature of between about 70° and about 140° C.
Claim 46
Dependent Claim
25 words
The process as defined in claim 44 wherein the heat treating is effected during a period of from about 30 seconds to about 20 minutes.
Claim 47
Dependent Claim
26 words
The process as defined in claim 45 wherein the water content of the heat treated shaped article is from about 3 to about 10% by weight.
Claim 48
Dependent Claim
24 words
The process as defined in claim 28 wherein the synthetic polymer comprises recurring oxyethylene units and two terminal --CH 2 -O-CO-NH-CH 2 -OH groups.
Claim 49
Dependent Claim
23 words
The process as defined in claim 28 wherein the synthetic polymer comprises recurring oxypropylene units and two terminal--CH 2 -O-CO-NH-CH 2 -OH groups.
Claim 50
Dependent Claim
65 words
The process as defined in claim 28 wherein the synthetic polymer comprises two terminal --CH.sub.2 -O-CO-CH.sub.2 -OH groups and a copolymer obtained by addition copolymerization of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof and an aliphatic compound copolymerizable therewith containing two reactive groups selected from the group consisting of hydroxy, carboxyl, primary amino or secondary amino.
Claim 51
Dependent Claim
22 words
The process as defined in claim 49 wherein the aliphatic copolymerizable compound is selected from the group consisting of diols and diamines.
Claim 52
Dependent Claim
26 words
The process as defined in claim 49 wherein the aliphatic compound is selected from the group consisting of glycerine, propanediol, butanediol, ethylene diamine, and hexamethylene diamine.
Claim 53
Dependent Claim
52 words
The process as defined in claim 28 wherein the synthetic polymer comprises at least three terminal --CH 2 O-CO-CH 2 -OH groups and a copolymer obtained by addition copolymerization of an alkylene oxide selected from the group consisting of ethylene oxide, propylene oxide and mixtures thereof and an aliphatic polyol copolymerizable therewith.
Claim 54
Dependent Claim
51 words
The process as defined in claim 52 wherein the polyol is selected from the group consisting of glycerine, pentaerythritol, mannitol, sorbitol, dulcitol, sucrose and polyethylene glycol of the general formula OH-(-CH.sub.2 -CH.sub.2 -O-).sub.n -CH.sub.2 -CH.sub.2 -OH wherein n is an integer of from 1 to 5, and preferably 1 to 3.
Claim 55
Dependent Claim
54 words
The process as defined in claim 28 wherein the synthetic polymer has two terminal N-methylolcarbamate groups, and comprises a polyethylene glycol of the general formula HO-(CH.sub.2 -CH.sub.2 -O-).sub.n -CH.sub.2 -CH.sub.2 -OH wherein n is an integer of from 1 to about 120 wherein two terminal OH groups have been converted into N-methylol carbamate groups.
Claim 56
Dependent Claim
19 words
The process as defined in claim 54 wherein n is an integer of from about 50 to about 60.
Claim 57
Dependent Claim
27 words
The process as defined in claim 54 wherein the polyethylene glycol is selected from the group consisting of diglycol, triglycol, polyethylene glycol 200, and polyethylene glycol 1000.
Claim 58
Dependent Claim
57 words
The process as defined in claim 28 wherein the synthetic polymer has two terminal N-methylol carbamate groups and comprises a polypropylene glycol of the general formula HO--(-CH.sub.2 -CH.sub.2 -CH.sub.2 -O).sub.n -CH.sub.2 -CH.sub.2 -CH.sub.2 --OH wherein n is an integer of from 1 to about 120 wherein two terminal OH groups have been converted into N-methylol carbamate groups.
Claim 59
Dependent Claim
19 words
The process as defined in claim 57 wherein n is an integer of from about 50 to about 60.
Claim 60
Dependent Claim
29 words
The process as defined in claim 26 which further comprises the step of applying to the tube shaped article an inner layer of a water vapor permeable polymer coating.
Claim 61
Dependent Claim
23 words
A method of preparing sausages which comprises the step of filling a sausage material into a tube-shaped article as defined in claim 1.
References Cited (Backward Citations)
US2866710A
Cited
US3009831A
Cited
US3917894A
Cited
US3656993A
Cited
US3912839A
Cited
US3872196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |