Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/20—Macromolecular organic compounds
  • D21H17/33—Synthetic macromolecular compounds
  • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
  • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
  • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
  • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
  • D06N3/125—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyamides
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/21—Nylon
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31725—Of polyamide
  • Y10T428/31739—Nylon type
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31725—Of polyamide
  • Y10T428/31779—Next to cellulosic
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2033—Coating or impregnation formed in situ [e.g., by interfacial condensation, coagulation, precipitation, etc.]

Definitions

• j ⁇ the term "nylon" is not customarily applied to synthetic polyamid'es which are water-soluble.
• present invention is concerned with XVHtGY-iHS OI-J uble, high molecular weight or fibre-forming polyamides soluble in "strong acid such as are described in United States patent specification No. 2,071,250, Wallace H. Car-others, patented” February 16 ,'193'7;"United' States patent specification No. 2,071,253, Wallace H. Carother's, pat,- tented February 16, '1937 and United States pat ent specification No. 2,130,948, Wallace H. Carothers, patented September 20, 1938. I,
• the principal object oi the 'presentinvention is to deposit a waterdnsoluble' synthetic linear polyamide on divided, adherent particles- "wate -i solubl syntheticlinear polyamides will dissolve incom I paratively istron'g'acid and may be precipitated therefrom by the action-of an aqueous mediumand this .fact-is utilised in the present invention 'to precipitate the polyamide on cellulos'ic or non-cellulosic fibrous material's.
• the polyamid'e adheres firmly to the fibres producing a white, opaque effect which is 'fast to laundering and does not render the fibrous material hard or harsh,
• the material on which the water insoluble linear polyam-ide hasfbeen precipitated can -b'e passed with or without tension over heated rollers to fuse the polyamide.
• This is particularly applicable to synthetic linear polyamides of low melting point. It will .be apparent from the aforementioned patent specifications that there is a wide range of water-insoluble synthetic linear polyamides of various melting points. Any of theseeither singly or mixed, soluble in strong acid, may beeuse in carrying out the present invention.
• the fibrous materials which the treated are cotton, linen, wool-naturalj silk; viscose yarn, cellulose acetate or mixtures of any of these with one'another-or with synthetic linear polyamide fibresbut the reagent should be'chosen' so as not to damage the m'ater ial treated.
• the 'fi'brous' materiah may be in the for m of fabrics, woven *or knitted, o'i-fin any other form, eg as yarn, fibre or sheet; Co,n tinuoussheet materialsuchas paper or wood may also be treated with water-insoluble syn- 'thetic'linear polyamide's by this method.
• Fabric which is treated in accordance with the present invention- may be rendered crease: resistant by means or resinous condensation products and, if required; after-treated with swelling agents, or. the "treated fabric may be subjected to other finishing processes.
• treated 1 with gwateri-n'soluble synthetic -l'inear polyamides in accordance with. the pr'e'sent invention resists shrinking "and' felting after' mill- Among the;strong acidsiwhieh may beu'sed are sulphuric.
• any otheri'strong acids known-to Wool centrated is the acid, the more readily will the polyamide be dissolved but on the other hand the more concentrated acids; hydrolyse poly- The cn centration of the acid used must be sufficient to enable the polyamide to dissolve. The more conamides more readily and this must be taken into consideration in the treatment of textile materials with such solutions. Moreover, the concentration of acid which can be used obviously depends upon the strength of the acid. In the case of formic acid, for example, this may be.
• Example-3 2 parts by weight of polytetramethylenediamine adipamide of melting point 278 C.
• cotton or viscose fabric is run through this solution and nipped, off, after which it is washed off in water and neutralised.
• the so-treated fabric is then run through 140 Tw. sulphuric acid for '5 seconds after which it is washed off again in used anhydrous whereas the form of sulphuric acid commercially known as concentrated sul phuric acid cannot safely be used.
• 'A co'nvenient way of treating a textile fabric is to pass it through a solution of the polyamide in sulphuric acid, squeeze it an'dthen'run it into water, whereupon the polyamide is deposited on the fabric as a white pigment.
• the squeezing will generally be such as to leave 100% by weight of solution calculated on the dryweight of the fabric on the textile;
• Other pigments which will dissolve in the acid and will be precipitated therefrom by the addition of water (or substances soluble in the acid from which pigments are formed and precipitated by water) may be added to the solution so that co-precipitation takes place.
• a resist may be printed on the fabric before impregnation with the acid solution.
• An example of such resists which are preferably insoluble in strong acid, is cellulose'nitrate.
• Other resists insoluble in strong acid are well known.
• Fabrics which have been treated in accordance with the present invention may be given other known treatments such as parchmentising, for example with sulphuric acid or zinc chloride, or other known parchmentising agents, or'may be waterproofed, for example'with one of the known, pyridiniurn compounds.
• Example 1 2 parts by weight of polyhexamethylenediamine adipamide having a melting point of 278- C. are dissolved in 27 parts .by. weight of 70 Tw. sulphuric acid. A cotton or viscose fabric-is run through thissolution and nipped 01f, after which it is washed off in water-and neutralised.
• a -fine-cambric is'run through a solution of '1 part by weight of"polyethylenediamine"sebacate of melting point 254 C.' the manufacture of which is described in United States patent spe'ci fication 'No. 2,130;948 *'in 25 partsby 'w'eight' of commercial --hydrochloric acid containing 3 by weightof antimony rtrich'lorid'e, passed through water and neutralised. This treatment gives a stifi parchmentised eflect.
• Example 4 2 'parts by weight of 'an interpolyamide prepared by heating equimolecular proportions of hexamethylenediamine adipamide and decamethylene diammonium sebacate having a softeningpoint of 112 C., the manufacture of whichis'described in British patent specification No. 559,514, are dissolved in 27 parts by weight of 70 Tw. sulphuric acid. A cotton or viscose fabric is run through this solution and nipped off, after which it is washed off in water and neutralised.- The fabric is then run over a hot roller, with or without stretching, at a temperature high enough to melt the polyamide.
• Paper is impregnated with'a solution, in 25 parts by weight of 70- Tw. sulphuric acid, of 1 part by weight of a polymerprepared by heating hexamethylene diammonium adipate and aminostearic acid and having a melting point of 130 C. and an intrinsic viscosity of 0.98, the manufacture of which is described in British patent specificationNo. 559,514;
• the paper is then im-' mersed in water to precipitate the polyamide thereon. Sheets of paper thus treated can be banded together by heating an assembly of them toa suflicient temperature to bond the polyamide.
• Example 6 1 to.2 parts-by weight of the polyamide prepared from pentamethylenediamine and brassilic acid having a melting point of 176 C., the man-' ufacture of which is described in United States patent specification No. 2,130,948, are dissolved or dispersed in 25 parts'by weight of sulphuric acid of Tw. To the solution is added loose fibre of any description after which the polyamide is precipitated with' water, washed and neutralisedp The mass of-polyamide covered fibres is then heated above the melting point ofthe-polyamide and pressedso that a composite mass of polyamide and fibres is obtained.
• the mass can be rolled into any required thickness and then heated to melt the the-precipitant"for the polyamide wemay use any a ueous Iiquorin' which the polyamide is sub-' stantially insoluble and with which the solution of polyamide is miscible and which does not have any detrimental effect upon the fibrous material treated such as dilute aqueous alkali, e. g. caustic soda or aqueous solutions containing inert salts such as sodium chloride or sodium sulphate.
• a ueous Iiquorin' which the polyamide is sub-' stantially insoluble and with which the solution of polyamide is miscible and which does not have any detrimental effect upon the fibrous material treated such as dilute aqueous alkali, e. g. caustic soda or aqueous solutions containing inert salts such as sodium chloride or sodium sulphate.
• Process of treating fibrous material which consists in applying to it a solution of a polyalkylenediamine adipamide in sulphuric acid, removing excess solution and then passing the material into water and thereby precipitating in situ the said polyalkylenediamine adipamide in fine particular form, and neutralising the fibrous material.

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• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• Proteomics, Peptides & Aminoacids (AREA)
• Dispersion Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Paper (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Cited By (19)

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Citations (5)

• 0
  • NL NL61278D patent/NL61278C/xx active
• 1943
  • 1943-03-08 GB GB3704/43A patent/GB567043A/en not_active Expired
• 1944
  • 1944-03-17 CH CH244849D patent/CH244849A/de unknown
• 1946
  • 1946-07-24 FR FR931236D patent/FR931236A/fr not_active Expired
• 1947
  • 1947-07-29 US US764575A patent/US2610927A/en not_active Expired - Lifetime
• 1948
  • 1948-12-11 DE DEP24392D patent/DE807395C/de not_active Expired

Patent Citations (5)

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