Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M17/00—Producing multi-layer textile fabrics
  • D06M17/02—Producing multi-layer textile fabrics by applying cellulose derivatives as adhesives
• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
  • C09J201/00—Adhesives based on unspecified macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L2666/00—Composition of polymers characterized by a further compound in the blend, being organic macromolecular compounds, natural resins, waxes or and bituminous materials, non-macromolecular organic substances, inorganic substances or characterized by their function in the composition
  • C08L2666/02—Organic macromolecular compounds, natural resins, waxes or and bituminous materials

Definitions

• the invention relates to an adhesive with an additive made of a hydrophilic polymer which is improved in water vapor absorption capacity and permeability, a process for its production and its use
• DT-PS 1 006 558 describes an adhesive composed of a butadiene copolymer (butadiene-methyl-isopropenyl ketone copolymer) and a cellulose derivative.
• Suitable cellulose derivatives are cellulose esters, such as cellulose nitrate or acetate, and cellulose ethers, such as benzyl cellulose.
• the amount of the above-mentioned, usually film-forming cellulose derivatives should be 25 to 75% by weight of the copolymer, the adhesives produced in this way should have a high binding power.
• an adhesive which contains a water-soluble or water-swellable hydrocolloid or a mixture of such hydrocolloids and a water-insoluble, viscous, natural or synthetic, rubber-like binder.
• Suitable hydrocolloids are polyvinyl alcohol, pectin, gum arabic, gelatin, alginates, carboxymethyl cellutose, polyethylene glycols, carboxypolymethylene and polyoxyethylene.
• the adhesive should adhere immediately to a wide variety of wet surfaces and their adhesive properties. also do not lose if dry surfaces covered with the adhesive become damp.
• DT-AS 23 64 125 describes a pressure-sensitive adhesive mixture which consists of 90 to 99 parts by weight of a tacky copolymer of an alkyl acrylate whose alkyl group contains 1 to 14 carbon atoms, the average number of carbon atoms being 4 to 12 a double bond and thus copolymerizable monomers and 10 to 1 parts by weight of a hydroxyethyl cellulose.
• This adhesive mixture as a gas- and moisture-permeable adhesive layer on a gas- and moisture-permeable substrate for the production of pressure-sensitive, breathable adhesive tapes or adhesive sheet-like materials is mentioned as an area of application.
• the object of the invention is to propose an adhesive which is improved and permeable to water vapor and which is improved over the prior art and which can contain the most diverse binders in different adhesive systems.
• the invention is based on a water vapor-absorbent and permeable adhesive containing at least one organic, water-insoluble binder, an addition of at least one hydrophilic polymer and optionally an organic solvent and / or water.
• the adhesive according to the invention is characterized in that the hydrophilic polymer is a small-sized, swellable, modified polymer. Swellable polymers are understood to mean those which swell in aqueous liquids, in particular with a water content of more than 50% by weight, or are caused by water molecules (eg water vapor) which come into contact with them in some other way. In particular, the polymer is at least about 50% by weight water-insoluble.
• the adhesive contains about 5 to 30% by weight of these polymers, based on the total dry adhesive mass.
• Irradiation can take place with the polyalkylene oxide in the solid state or in solution.
• the absorbent, crosslinked, carboxyl group-containing copolymer according to DT-OS 25 07 011 from an ⁇ , ⁇ -unsaturated acid and an acetal of the general formula where n 0, 1 or 2.
• Acrylic acid, methacrylic acid, itaconic acid, ⁇ -phenylacrylic acid or ⁇ -benzylacrylic acid are particularly suitable as ⁇ , ⁇ -unsaturated acid; in the preparation of the copolymer it is expedient to use 0.1% to 15% of the acetal to 85% to 99.9% of one of the unsaturated acids.
• DT-OS 25 41 035 at least for the most part water-insoluble, water-swellable absorbent polymers which are prepared in such a way that etherified in a homogeneous phase polyhydroxymethylene in an aqueous alkaline solution with an ⁇ -halocarboxylic acid and before, during or after etherification with a polyfunctional crosslinking agent compared to polyhydroxymethylene in an alkaline medium.
• D.S. Degree of substitution, ie number of substituted hydroxyl groups on an anhydro-D-glucose unit
• etherification agents containing carboxyl groups are used, which would result in a normally soluble cellulose ether, the conditions of the reaction are chosen such that alkali metal salts of carboxymethyl cellulose with a DS of 0.4-1.2, a water-soluble fraction of ⁇ 35%, a water retention value (WRV) of about 1,000 to 7,000 and a salt water retention value of about 400 to about 2,500.
• Dry, solid, water-swellable, water-insoluble absorbents according to DT-OS 26 09 144, which consist of an ionic complex of a water-insoluble anionic polyelectrolyte and a cation of at least 3-valent metal; polyacrylic acid, starch or cellulose derivatives are suitable as polyelectrolytes.
• Cellulose graft polymers according to DT-OS 25 16 380 which are produced by grafting the cellulose side chains from such polymer residues that are selected from the ionic and nonionic polymer residues.
• the following are suitable, for example: polyacrylic acid, sodium polyacrylate, polymethacrylic acid, potassium polymethacrylate, polyvinyl alcohol sulfate, polyphosphoric acid, polyvinylamine, poly- (4-vinylpyridine), hydrolyzed polyacrylonitrile, polymethyl methacrylate, polyvinyl acetate, polystyrene or polybutadiene.
• Granulated, water-insoluble alkali metal carboxylate salts of starch-acrylonitrile graft copolymers according to US Pat. No. 3,661,815, which are prepared by saponification of starch-acrylonitrile graft copolymers with a base in an aqueous alkaline medium.
• Modified cellulose material with improved retention for both water and physiological liquids according to DT-OS 25 28 555 which by grafting an olefinically unsaturated, polymerizable monomer with hydrolyzable functional groups or a monomer carrying carboxyl groups onto a fibrous cellulose material and hydrolyzing or otherwise treating the grafted product is made with alkali.
• the product is first brought into the state of maximum swelling, then acidified to a pH at which it has the state of minimal swelling, then converted into the salt form under conditions not causing swelling and finally dried.
• Modified polysaccharide according to DT-OS 26 47 420 made from polysaccharide, acrylamide, another vinyl monomer and a divinyl monomer under radical reaction conditions.
• the basic materials for the adhesives according to the invention are organic, water-insoluble binders, in particular based on natural or synthetic rubber or a semi-synthetic or synthetic polymer.
• the adhesives can u. a. also contain plasticizers, agents for increasing the adhesiveness, reaction accelerator or slower reaction, liquefier, fillers, extenders or dyes.
• the nonwoven particles are also intended to be bonded to one another.
• the adhesive according to the invention also delivers good results in these applications.
• the particles of at least one swellable, modified polymer preferably in a proportion of 5 to 30% by weight, based on the total dry adhesive, are added to the basic adhesive compositions to be processed and uniformly therein distributed; the mixture is then spread or otherwise deformed.
• the term "evenly distributed” is understood to mean a statistical distribution.
• the adhesive according to the invention should not be heated to a maximum of about 150.degree. C. for longer than about 10 minutes and not about 120.degree. C. to 130.degree. If the adhesive is in the form of an aqueous or water-containing dispersion, it is advisable to increase the water content of the adhesive before or with the addition of the small-sized, swellable, modified polymers in order to obtain the adhesive in a form which is easy to process.
• the adhesives according to the invention have a good ability to absorb and permeable to water vapor, which goes far beyond a pure transport effect of the incorporated parts.
• the adhesives also able to release the absorbed water vapor under certain conditions, such as staying in a different climate.
• the stated properties of the adhesives according to the invention are not based solely on the significantly detectable effect due to the addition of the particles of at least one swellable, modified polymer, but rather u. a. also on the thickness of the adhesive film or coating; dependent, these are expediently produced in a thickness of approximately 0.01 to approximately 0.5 mm, in particular if, in addition to good water vapor absorption capacity, good water vapor permeability is also to be achieved.
• the adhesives according to the invention with the properties mentioned are preferably used for the bonding of flat materials in the manufacture and processing of coated textiles and natural and synthetic leathers, that is to say materials which are suitable for those areas of application in which body fluids, such as, for. B. sweat, may occur; these include, for example, outer clothing (all-weather or leather clothing), shoe upper materials, shoe lining or shoe insoles.
• Adhesive films according to the invention are produced and examined for their water vapor permeability and absorption capacity and compared with similar adhesive films without additives.
• the adhesives are structured as follows:
• the additive according to the invention results in a significant increase in the WDD and WDA values, which increase as the amount of the additive increases.
• the peel resistance L of adhesives with and without the additive according to the invention is determined.
• the peeling resistance L is the force, based on the adhesive joint of a sample, that is necessary to separate the sample in the peeling test.
• the respective substrate samples are made of rubber and / or leather, the surfaces are cleaned and roughened, and strips of 150 mm ⁇ 30 mm are punched out of the substrates.
• the adhesive is stored at 23 ° C t 2 ° C until it has reached this temperature and then depending on its type on the or the southeast rate applied and processed so that two substrate strips are glued to a length of 100 mm.
• the non-glued ends of the samples are bent on both sides and clamped to a length of 20 mm in the tensile testing machine.
• the two ends are pulled apart at a feed rate of 100 mm / min.
• the adhesives are structured as follows:
• the adhesives mentioned provide the following peeling resistances (in N / mm) when test rubber / test rubber is bonded: 9.6 (example V3), 9.5 (example 5), 8.7 (example V5) and 8.4 (Ex. 7); with a test rubber / test leather bond: 8.7 (Ex. V4), 8.9 (Ex. 6), 8.3 (Ex. V6) and 8.4 (Ex. 8); with a test leather / test leather bond: 1.5 (example V7), 1.5 (example 9), 1.3 (example V8) and 1.4 (example 10).
• the peeling resistances do not change, or change only to an insignificant extent, so that the adhesive strength of the adhesives is at most only slightly influenced by the additive according to the invention.
• Polyester staple fibers (polyethylene glycol terephthalate, 1.3 dtex, 38 mm long) are processed via carding machine and stacker to a fleece with a weight per unit area of approximately 150 g / m 2 and slightly mechanically consolidated in a needle needle chair.
• the needled fleece is bound with an aqueous polyurethane-containing medium (binder content about 65 to 70 wt .-%, based on the fiber content), for. B.
• aqueous polyurethane dispersion aqueous polyurethane dispersion
• anionic and nonionic emulsifier aqueous Ca (N0 3 ) 2 solution
• leather dye aqueous dye
• an addition of the modified, swellable polymer aqueous polyurethane dispersion
• anionic and nonionic emulsifier aqueous Ca (N0 3 ) 2 solution
• leather dye in the examples, but not in the comparative example

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Adhesives Or Adhesive Processes (AREA)
• Materials For Medical Uses (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=6016113

Family Applications (1)

Country Status (12)

Cited By (2)

Families Citing this family (12)

Citations (6)

Family Cites Families (1)

• 1977
  • 1977-08-11 DE DE19772736147 patent/DE2736147A1/de not_active Withdrawn
• 1978
  • 1978-08-03 EP EP78100588A patent/EP0000776A1/fr not_active Ceased
  • 1978-08-08 PL PL1978208920A patent/PL112854B1/pl unknown
  • 1978-08-09 RO RO7894931A patent/RO75080A/fr unknown
  • 1978-08-09 AT AT579778A patent/AT361590B/de not_active IP Right Cessation
  • 1978-08-09 CA CA308,969A patent/CA1103836A/fr not_active Expired
  • 1978-08-10 CS CS785240A patent/CS202507B2/cs unknown
  • 1978-08-10 BR BR7805125A patent/BR7805125A/pt unknown
  • 1978-08-10 IT IT7850704A patent/IT7850704A0/it unknown
  • 1978-08-10 DK DK353878A patent/DK353878A/da unknown
  • 1978-08-10 US US05/932,621 patent/US4194995A/en not_active Expired - Lifetime
  • 1978-08-10 DD DD78207218A patent/DD138078A5/xx unknown

Patent Citations (6)

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