CS267932B1 - Contact polyurethane adhesive - Google Patents
Contact polyurethane adhesive Download PDFInfo
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- CS267932B1 CS267932B1 CS875262A CS526287A CS267932B1 CS 267932 B1 CS267932 B1 CS 267932B1 CS 875262 A CS875262 A CS 875262A CS 526287 A CS526287 A CS 526287A CS 267932 B1 CS267932 B1 CS 267932B1
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Abstract
Rieši sa problém zloženia polyuretanového lepidla so zvýšenou kontaktnou adhézlou a otvorenou dobou lepidla· Podstatou riešenia je to, že lepidlo obsahuje 0,01 až 2 X hmot. oxidov kovov alkalických zemin. Lepidlo možno s výhodou použil na lepenie spodkových dielcov obuv 1.The problem of the composition of polyurethane adhesive with increased contact adhesion and open time of the adhesive is solved. The essence of the solution is that the adhesive contains 0.01 to 2 X mass. alkaline earth metal oxides. The glue may have been used with advantage for gluing the lower parts of shoes 1.
Description
Vynález »a týká kontaktného potyuretánového lepidla, určeného na zlepovonie obuvnic kych ·podkových dielcov.The present invention relates to a polyurethane contact adhesive for gluing shoe soles.
V súčasnosti sa pri zhotovováni obuvnických spodkových dielcov, hlavně pédpStkov a klinov, používajú různé materiály, například húževnaté typy polystyrénu, polyamid, polypropylén a podobné. Pri zlepovani víčšiny týchto materiálov, alebo 1ch obalovaní, například usnou, sa používajú Lepidlá na báze polychlóroprénového kaučuku. Vzhladom na skutočnost, že obalovanie alebo zlepovanie spodkových dielcov sa vykonává ručně, je potřebné, aby používané lepidlá disponovali výraznou kontaktnou lepivostou. Táto vlastnost umožňuje aj pří ručnom zalisovani dielcov s nánosem kontaktného lepidla dosiahnut dostatečné pevný vzájomný spoj. Při používáni polychlo roprénových lepidiet je dosiahnutie dobrej kontaktnej lepivosti nožné použitím širokej patety živíc. Je známe například použitie kalafuny alebo jej esterov s glycerinem alebo pentaerytrito lom. Je známe tiež použitie syntetickej cyklohexánovej živice í fenolickej živice modifikovanej kalafunou. Óalej je známe použitie p-terc. bu ty l f enol f o.rna l dehydove j živice, ktorá vyhovuje běžným požiadavkáa, kladeným na zvýšenie lepivosti po l ych lóroprénových tepidiet. Aplikácia týchto živic neprichádza do úvahy pře dosiahnutie kontaktnej lepivosti polyuretánových lepidiel. Příčina je v obmedzenej rozpustnosti uvedených živic v ketonických rozpúštadlách a hlavně v nedosta točnéj kompatibilitě prtrodných živíc s polyuretánovými polymérmi. Skutočnost, že neexistovalo .po l yur e tá nové lepidlo s kontaktnou lepivostou umožnujúce spojovanie spodkových dielcov navzájem alebo s usnovým potahem len pri ručnom zatlačení spósobovala, že- vyber materiálov pre obuvnické spodkové dielce sa obmedzoval len na tie, ktoré bole možné úspěšně lepit existujúci o i polychlóroprénovýni lepidlami. Je. známe použitie samotnej dvojsýtnej kyseliny ako pridavku do polyuretanových lepidla. Nevýhodou tohoto lepidla je zníženie kontaktnej lepivosti po určitej době a tiež zniženie pevnosti zlepeného spoja, pretože dochádza ku hydrolyze katalyzovanej kyselinou. Oosledkom hydrolýzy je pokles viskozity lepidla až o 20 X, a tým zniženie pevnosti spoja.At present, various materials are used in the manufacture of footwear bases, especially pads and wedges, for example, tough types of polystyrene, polyamide, polypropylene and the like. Adhesives based on polychloroprene rubber are used in bonding most of these materials, or in coatings, for example leather. Due to the fact that the wrapping or gluing of the bottom parts is done by hand, it is necessary that the adhesives used have a significant contact tack. This feature also makes it possible to achieve a sufficiently strong interconnection when manually pressing the parts with the contact adhesive. When using polychloroprene adhesives, achieving good contact tack is achievable by using a wide resin bead. For example, the use of rosin or its esters with glycerol or pentaerythritol is known. It is also known to use a synthetic cyclohexane resin and a rosin-modified phenolic resin. Furthermore, the use of p-tert is known. a butyl phenol phosphoric resin which meets the usual requirements for increasing the tack of lozropene thermocouples. The application of these resins is not possible to achieve the contact tack of polyurethane adhesives. The reason is the limited solubility of said resins in ketonic solvents and especially in the insufficient compatibility of feed resins with polyurethane polymers. The fact that there was no new adhesive with a contact tack allowing bonding of the underparts to each other or to the leather cover only when pressed by hand meant that the choice of materials for footwear underpins was limited to those that could be successfully glued to the existing one. and polychloroprene adhesives. Is a. the use of dibasic acid alone as an additive to polyurethane adhesives is known. The disadvantage of this adhesive is the reduction in contact tack after a certain time and also the reduction in the strength of the bonded joint, since acid-catalyzed hydrolysis occurs. The result of hydrolysis is a decrease in the viscosity of the adhesive by up to 20 X, and thus a reduction in the strength of the joint.
Uvedenú nevýhodu odstraňuje kontaktné polyuretánové lepidlo podta vynálezu, ktorého podstata spočívá v tom, že obsahuje 0,01 až 2 X hmot, oxidov kovov alkalických zemin.This disadvantage is eliminated by the contact polyurethane adhesive according to the invention, the essence of which consists in that it contains 0.01 to 2% by weight of alkaline earth metal oxides.
Technický účinok vynálezu spočiva v zníženi počiatočnej rychlosti kryštalizácie polymérnej zložky lepidla účinkem dvojsýtnej kyseliny a v důsledku toho docháza k zvSčšeniu kontaktnej adhézíe a otvorenej doby lepidla. Pridavkom oxidov alkalických kovov sa výhodné upraví pH, čím sa zabráni hydrolýze polyuretánového lepidla. Lepidlo podlá vynálezu umožňuje spájanie alebo obalovanie obuvnických spodkových dielcov, hlavně podpStkov a klinov na báze zmesi terpolymérov akrylonitr1lbutadiénstyrénu a homo-a/alebo kopolymérmi vinyl ch loridu obsahujúcej nizkomílekulárne zmSkčovadlá po Iyviny I chloridu, tepelné stabilizátory, plnívá a pigmenty. Použitie týchto zmesi pri výrobě spodkových dielcov umožňuje v širokom rozsahu modifikovat rad úžitkových a spracovatelských vlastnosti, například tvrdost, tokové vlastnosti, modul pružnosti v tlaku a podobné, čo má v konečnom důsledku význam pře zvýšenie variability obuvnickej výroby.The technical effect of the invention is to reduce the initial rate of crystallization of the polymeric component of the adhesive by the action of dibasic acid, and as a result, the contact adhesion and the open time of the adhesive are increased. The pH is preferably adjusted by the addition of alkali metal oxides to prevent hydrolysis of the polyurethane adhesive. The adhesive according to the invention makes it possible to join or coat shoe soles, in particular pads and wedges based on a mixture of terpolymers of acrylonitrile butadiene styrene and homo- and / or copolymers of vinyl chloride containing low molecular weight plasticizers for polyvinyl chloride, heat stabilizers, fillers and pigments. The use of these mixtures in the production of underparts makes it possible to modify a wide range of utility and processing properties, such as hardness, flow properties, modulus of elasticity in compression and the like, which ultimately is important for increasing the variability of footwear production.
Lepidlo ďalej ozrejmujů priklady jeho zloženia.The glue is further illustrated by examples of its composition.
Přiklad 1Example 1
Zhomogenizovaním sa připravilo lepidlo známého zloženia s 15 X hmot, lineárneho polyuretánu s viskozitou 0,4 Pa.s pri teplote 20 °C, 65 X hmot, acetonu a 20 X hmot, toluénu. Lepidlo sa nanieslo na useň a na podpStok vyrobený zo zmesi terpolyméru akrylon itrylbutadiénstyrénu, polyvinylchloridu a nitkomolekulárneho zmSkčovadla. Po 30 minutách sušenia na volnom vzduchu sa podpStok spojil s usnou a ručně zatlačil. Výsledný spoj mal pevnost 10 N/2,5 cm, čo je nevyhovujúce.An adhesive of known composition with 15% by weight of linear polyurethane with a viscosity of 0.4 Pa.s at 20 DEG C., 65% by weight of acetone and 20% by weight of toluene was prepared by homogenization. The adhesive was applied to the leather and to a support made of a mixture of acrylonitrile, butyl butadiene styrene terpolymer, polyvinyl chloride and a nitromolecular plasticizer. After drying in the open air for 30 minutes, the undercoat was bonded to the leather and pushed by hand. The resulting joint had a strength of 10 N / 2.5 cm, which is unsatisfactory.
CS 267932 BlCS 267932 Bl
Přiklad 2Example 2
Lepidlo sa připravilo zhomogenizovanlm 13 X hmot, lineárneho polyuretanu s viskozitou 0,45 Pa.s pr1 teplote 20 °C, 70 λ hmot, me tyletylketonu, 16,5 X hmot, benzinu a 0,5 X hmot, kyseliny adipovej. Lepidlo sa nanleslo podobné ako v přiklade 1 na spodkový dielec a. useň. Po 30. mijzúta.ch ..suienia na volno· vzduchu a po ruino· zatlačeni dielcov vykazovat spoj pevnost 28 N/2,5 cm. Po 10 dňoch doilo k poklesu pevnosti spoja na hodnotu 15 N/2,5 cm.The adhesive was prepared by homogenizing 13% by weight of a linear polyurethane having a viscosity of 0.45 Pa.s at 20 DEG C., 70 .mu.l of weight, methyl ethyl ketone, 16.5 parts by weight of gasoline and 0.5% by weight of adipic acid. The adhesive was applied similarly to Example 1 on the bottom panel a. leather. After 30 minutes of drying in the open air and after ruining the parts, the joint has a strength of 28 N / 2.5 cm. After 10 days, the joint strength decreased to 15 N / 2.5 cm.
Přiklad 3Example 3
Lepidlo sa připravilo zhomogenizovanim 17 X hmot, lineárneho polyuretanu s viskozitou 0,6 Pa.s pri teplote 20 °C, 60 X hmot, acetonu, 10 X hmot, cyklohexanónu, 12 X haot. toluénu, 0,9 X hmot, kyseliny fumarovej a 0,1 X hmot, oxidu vápenatého. Po naneseni lepidla na časti ako v přiklade 1, 30 minútovom suieni a ručnom zalisovani vykazoval spoj pevnost 32 N/2,5 cm.The adhesive was prepared by homogenizing 17% by weight, a linear polyurethane with a viscosity of 0.6 Pa.s at 20 ° C, 60% by weight, acetone, 10% by weight, cyclohexanone, 12% by weight. of toluene, 0.9% by weight of fumaric acid and 0.1% by weight of calcium oxide. After applying the adhesive to the parts as in Example 1, drying for 30 minutes and pressing by hand, the joint showed a strength of 32 N / 2.5 cm.
Přiklad 4Example 4
Lepidlo sa připravilo zhomogenizovanlm 11 X hmot, lineárneho polyuretanu s viskozitou 0,8 Pa.s pri teplote 20 °C, 78 X hmot, acetonu, 5 X hmot, cyklohexanónu, 5,2 X hmot, toluénu, 0,5 X hmot, kyseliny sebakovej a 0,3 X hmot, oxidu horečnatého. Po naneseni lepidla na časti ako v přiklade 1, 30 minútovom suieni a ručnom zalisovani vykazovat spoj pevnost 30 N/2,5 cm.The adhesive was prepared by homogenizing 11% by weight of a linear polyurethane having a viscosity of 0.8 Pa.s at 20 ° C, 78% by weight of acetone, 5% by weight of cyclohexanone, 5.2% by weight of toluene, 0.5% by weight. sebacic acid and 0.3% by weight of magnesium oxide. After applying the adhesive to the parts as in Example 1, drying for 30 minutes and pressing by hand, the joint has a strength of 30 N / 2.5 cm.
Přiklad 5Example 5
Lepidlo sa připravilo zhomogenizovanlm 15 X hmot, lineárneho polyuretinu s viskozitou 0,8 Pa.s pri teplote 20 °C, 75 X hmot, acetonu, 5,5 X hmot, toluénu, 0,5 X hmot, kyseliny adipovej a 1 X hmot, oxidu horečnatého. Po naneseni lepidla na časti ako v přiklade 1, 30 minútovom suieni a ručnom zalisovani vykazoval spoj pevnost 31 N/2,5 cm.The adhesive was prepared by homogenizing 15% by weight, linear polyurethane with a viscosity of 0.8 Pa.s at 20 ° C, 75% by weight, acetone, 5.5% by weight, toluene, 0.5% by weight, adipic acid and 1% by weight. , magnesium oxide. After applying the adhesive to the parts as in Example 1, drying for 30 minutes and pressing by hand, the joint showed a strength of 31 N / 2.5 cm.
Lepidlo možno predovietkým využit na lepenie časti, ktoré nemožno zalisovat a je určené najmi pře obuvnicky priemysel.The glue can be used primarily for gluing parts that cannot be pressed and is intended primarily for the footwear industry.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS875262A CS267932B1 (en) | 1987-07-10 | 1987-07-10 | Contact polyurethane adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS875262A CS267932B1 (en) | 1987-07-10 | 1987-07-10 | Contact polyurethane adhesive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CS526287A1 CS526287A1 (en) | 1989-07-12 |
| CS267932B1 true CS267932B1 (en) | 1990-02-12 |
Family
ID=5397182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS875262A CS267932B1 (en) | 1987-07-10 | 1987-07-10 | Contact polyurethane adhesive |
Country Status (1)
| Country | Link |
|---|---|
| CS (1) | CS267932B1 (en) |
-
1987
- 1987-07-10 CS CS875262A patent/CS267932B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CS526287A1 (en) | 1989-07-12 |
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