US2121408A - Artificial cellulosic material - Google Patents
Artificial cellulosic material Download PDFInfo
- Publication number
- US2121408A US2121408A US85439A US8543936A US2121408A US 2121408 A US2121408 A US 2121408A US 85439 A US85439 A US 85439A US 8543936 A US8543936 A US 8543936A US 2121408 A US2121408 A US 2121408A
- Authority
- US
- United States
- Prior art keywords
- cellulosic material
- artificial
- artificial cellulosic
- titanium
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
- D01F2/12—Addition of delustering agents to the spinning solution
Definitions
- This invention relates to artificial cellulosic material such as silk filaments having a reduced luster or subdued luster
- artificial cellulosic material having a reduced luster can be prepared by spinning a cellulosic solution having incorporated therewith a calcined titanium dioxide pigment or a calcined titanium dioxide containing pigment.
- These titanium pigments give the artificial cellulosic material prepared a desired reduced luster.
- considerable disadvantages are connected with the use of these calcined titanium pigments, in that the very hard crystal edges of the titanium dioxide wear out the metallic devices especially in the spinning process. In many cases it has further been found that the silk filaments themselves are roughened by the hard crystal edges.
- the silk obtained is not roughened, since the precipitated and dried titanium compound is softer than the calcined product.
- a titanium compound which is obtained by hydrolysis of titanium salt solutions, especially by hydrolysis of basic titanium sulfate solutions has proved to be particularly suitable for the delustering of artificial cellulosic material such as silk filaments.
- the product obtained by hydrolysis is washed with an alkaline reacting solution and thereby freed from the acids adhering to the product; the washed product is then dried at a temperature of about 80to about 125 C.
- the product obtained in this manner contains water osmotically bound which fills up the interstices between the titanium dioxide particles in an elongated crystal lattice. It is a very soft and finely divided powder.
- artificial cellulosic material used in the description and claims is intended to comprise artificial silk and other analogous products such as artificial horse hair, threads, bands, filaments and the like.
- a spinning solution for the manufacture of dull luster artificial cellulosic materials, comprising a solution of cellulose adapted for the preparation of artificial cellulosic materials and a deluste'ring agent consisting of finely divided acid-free precipitated and dried but uncalcined titanium pigment inan amount between about 1% and 5% based'on the weight ofcellulose in said material uniformly distributed throughout said solution.
- FRIEDRICH RASPE a solution of cellulose adapted for the preparation of artificial cellulosic materials and a deluste'ring agent consisting of finely divided acid-free precipitated and dried but uncalcined titanium pigment inan amount between about 1% and 5% based'on the weight ofcellulose in said material uniformly distributed throughout said solution.
Description
Patented June 21, 1938 UNITED STATES PATENT OFFICE Friedrich Raspe and Hermann Giese, Leverkusen I. G. Werk, Germany, assignors to I .G. Farbenindustrie the-Main, Germany Aktiengesellschaft,
Frankforton- No Drawing. Application June 15, 1936, Serial No. 85,439. In Germany June 28, 1935 2 Claims.
' This invention relates to artificial cellulosic material such as silk filaments having a reduced luster or subdued luster It is a known fact that artificial cellulosic material having a reduced luster can be prepared by spinning a cellulosic solution having incorporated therewith a calcined titanium dioxide pigment or a calcined titanium dioxide containing pigment. These titanium pigments give the artificial cellulosic material prepared a desired reduced luster. On the other hand, considerable disadvantages are connected with the use of these calcined titanium pigments, in that the very hard crystal edges of the titanium dioxide wear out the metallic devices especially in the spinning process. In many cases it has further been found that the silk filaments themselves are roughened by the hard crystal edges.
In accordance with the present invention these disadvantages are overcome by delustering the artificial cellulosic material by the addition of a precipitated and dried but not calcined titanium compound to the cellulosic mass to be spun. The following advantages are thus attained: first, the
metallic devices are not worn out and second;
the silk obtained is not roughened, since the precipitated and dried titanium compound is softer than the calcined product.
A titanium compound which is obtained by hydrolysis of titanium salt solutions, especially by hydrolysis of basic titanium sulfate solutions has proved to be particularly suitable for the delustering of artificial cellulosic material such as silk filaments. The product obtained by hydrolysis is washed with an alkaline reacting solution and thereby freed from the acids adhering to the product; the washed product is then dried at a temperature of about 80to about 125 C. The product obtained in this manner contains water osmotically bound which fills up the interstices between the titanium dioxide particles in an elongated crystal lattice. It is a very soft and finely divided powder.
While when using such uncalcined product as a pigment the covering power amounts to only illustrated by the fol- .are added. The viscose solution is thenspun with the use of the usual spinning bath. In this manner an artificial cellulosic material such as silk filament with a dull luster is obtained. In the same manner also cuprammonium and acetate cellulosecan be treated.
The term artificial cellulosic material used in the description and claims is intended to comprise artificial silk and other analogous products such as artificial horse hair, threads, bands, filaments and the like.
We claim:--
1. An artificial cellulosic material possessing a dull luster and obtained from a cellulosic solution, containing a uniformly distributed delustering agent consisting of finely divided acid-free precipitated and dried but uncalcined titanium pigment in an amount between about 1% and 5% based on the weight oi cellulose in said mateerial. v
2. A spinning solution for the manufacture of dull luster. artificial cellulosic materials, comprising a solution of cellulose adapted for the preparation of artificial cellulosic materials and a deluste'ring agent consisting of finely divided acid-free precipitated and dried but uncalcined titanium pigment inan amount between about 1% and 5% based'on the weight ofcellulose in said material uniformly distributed throughout said solution. FRIEDRICH RASPE.
HERMANN GIESE.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2121408X | 1935-06-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2121408A true US2121408A (en) | 1938-06-21 |
Family
ID=7985930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US85439A Expired - Lifetime US2121408A (en) | 1935-06-28 | 1936-06-15 | Artificial cellulosic material |
Country Status (1)
Country | Link |
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US (1) | US2121408A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2819173A (en) * | 1952-10-21 | 1958-01-07 | Degussa | Synthetic fibers and the like |
US9731743B2 (en) | 2014-08-04 | 2017-08-15 | Chad Collins | Utility cart and docking apparatus there for |
-
1936
- 1936-06-15 US US85439A patent/US2121408A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2819173A (en) * | 1952-10-21 | 1958-01-07 | Degussa | Synthetic fibers and the like |
US9731743B2 (en) | 2014-08-04 | 2017-08-15 | Chad Collins | Utility cart and docking apparatus there for |
US9884639B2 (en) | 2014-08-04 | 2018-02-06 | Chad Anthony COLLINS | Utility cart and docking apparatus there for |
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