Uv-strengthening glue composition, optical reading head with its using and optical recording/reproducing device comprising optical reading head

FIELD: glue compositions.

SUBSTANCE: invention relates to UV-strengthening glue compositions used for gluing substrates metal-silicate glass in electronic devices, such as optical reading head, thin-film transistor - semiconducting mesomorphic display, organic luminescent unit. The composition comprises oligourethaneacrylate - a mixture of oligourethaneacrylates of two type: the first is prepared by interaction of oligooxyalkylenepolyol of molecular mass 1000-5000 Da, diisocyanate of aliphatic or aromatic structure and alkylene glycol monomethacrylate, and the second based on oligobutadienediol of molecular mass 2000-3000 Da, diisocyanate of aliphatic or aromatic structure and alkylene glycol monomethacrylate in the mass ratio of the first to the second = (1.0-4.0):1, reactive monomer as a diluting agent, silicate filling agent, organic tert.-butylperbenzoate, thixotropic agent - aerosil and photoinitiating agent, and, additionally, it comprises oxalic acid as adhesion promoter, silane dressing agent and antioxidant of phenolic type. Invention provides the development of UV-strengthening glue composition possessing thixotropy, high strengthening rate, high adhesion strength being especially at effect of heat and moisture, temperature drop, low shrinkage and stability in storage.

EFFECT: improved and valuable properties of composition.

7 cl, 2 tbl, 5 dwg, 8 ex

 

The technical field

The present invention relates to UV-curable adhesive compositions used for bonding the substrates, metal-silicate glass in electronic devices, such as optical read head, a thin-film transistor - geopolitically crystal display, an organic luminescent element.

Prior art

In the study of the prior art revealed the following analogues of the inventive UV-curable composition.

Known UV-curable thixotropic adhesive composition (Japan's Bid No. 59-122568, 09J 3/14, publ. 16.07.1984 g)containing unsaturated urethane resin, epoxyacrylate resin, 1,2-polybutadiene having methacryloyl group, organopolysiloxane with (meth)acryloyloxy group, a monomer having one or more CH2=CR-groups in the molecule, photoinitiator and the filler is a mixture of hydrophobic and hydrophilic silica, having a surface SN3groups, and hydrophobic in a mixture of 50-90 wt.%.

Also known fototerapia composition (Japan's Bid No. 62-143908, 08 F 20/10, publ. 27.06.1987 was used as an adhesive and sealant containing 100 parts by weight of (meth)acrylate oligomer and/or monomer is 0.1-20 (0.1 to 10 parts by weight of photoinitiator and 0.1-80 (0.5 to 30) parts by weight of thixotropic agent powder SiO2with diameter the particles < (0.1 to 50) μm, the surface of which gidrofobizirovan treatment with silanes containing hydrocarbon radicals C≥6.

A prototype of the proposed fotoallergiyami adhesive composition is a radiation - and heat-curable adhesive [U.S. patent No. 6479563, 09J 175/16, publ. 12.11.2002,] containing 19-40 wt.% aromatic oligoamenorrhea, 9-25 wt.% 2-hydroxypropylmethacrylate or methacrylate, 1-5% of one or more photoinitiator, 35-70 wt.% one or more mineral fillers, 0.5 to 3 wt.% thixotropic agent containing SiO2and 0.5-2.0 wt.% the organic peroxide.

As photoinitiator you can use 1-[4-(2-hydroxyethoxy)phenyl]-2-hydroxy-2-ethyl-1-propane-1-he, bis(2,4,6-trimethylbenzoyl)phenylphosphine or 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinopropan-1.

As mineral fillers used Al2O3, AlN, BeO, BN, SiC, Si3N4TiO2, SiO2, diamond, graphite, BaSO4, GaAs and their mixture. As the organic peroxide can be used tert-butylperbenzoate, methylisobutylketone or Dibenzoyl peroxide.

The adhesion strength of this composition is equal to ≥10 MPa, shrinkage ≤6%, which is clearly insufficient when using the composition in electronic devices.

The purpose of this invention is to provide a UV-curable adhesive compositions about adusei thixotropy (=2-3), high curing speed (5-10 sec. upon irradiation with UV light λ=365 nm, at 250 MJ/cm2), high adhesive strength (≥5 MPa, silicate glass - steel 12X18H10T) and its reduction when exposed to heat and moisture, the temperature drops from +70°C to -30°S (20 cycles) not more than 30-35% of the initial, low shrinkage (3,5-4%) and storage stability ≥1 year.

Disclosure of inventions

We offer UV-curable adhesive composition used in electronic devices, must have the following properties:

to be thixotropic,

- possess a high curing speed,

to have a high adhesive strength, especially when exposed to moisture and heat,

- to cure, low shrinkage,

long - term stored without changing its performance.

The discrepancy of these properties leads to poor adhesive connection and distortion of the optical characteristics of electronic devices.

To achieve this objective, it is suggested composition of the UV-curable composition, comprising, by wt.%:

- oligourethanes11-23
- reactive monomer-diluent11-24
silicate filler50-65
- photoinitiator 2,5-5,0
organic peroxide -
tert-butylperbenzoate0,1-5,0
- thixotropic agentof 0.5-3.5
- antioxidant0,005-0,02
- the silane sizing0.1 to 2.5
- oxalic acid0.5 to 1.5

As oligoamenorrhea uses a mixture of two types:

the first is obtained by the interaction polyoxyalkylene with 1000-5000 mm, diisocyanate aliphatic or aromatic structure and monomethacrylate of alkalophilus,

the second is based on polybutadiene with 2000-3000 mm, diisocyanate aliphatic or aromatic structure and monomethacrylate of alkalophiles.

The mass ratio of the former to the latter as 1.0 to 4.0:1, preferably between 1.5 and 1.7:1.

Oligonucleosomal with terminal hydroxyl groups can be oligoastrocytoma/ holyoake-propranolol, oligoamenorrhea, oligomerisation-glycol, etc.

Oligomerization - product of the polymerization of 1,3-butadiene with 1/4 - and 1/2 - joining of monomer units. Preferably the copolymer with ˜30% 1,4 - and 70% of 1,2-accession.

The diisocyanate is 2,4-toluylenediisocyanate, isophorondiisocyanate, hexamethylenediisocyanate and others.

As re is klinopisnogo monomer-diluent is a mixture of mono - and polyfunctional methacrylates.

Representatives of monofunctional methacrylates are monomers with bulky cyclic substituents isobornylacrylat, dicyclopentadienyltitanium and hydroxycobalamin monomers include hydroxyethyl-, hydroxypropylmethacrylate.

From polyfunctional methacrylates used triethylene glycol dimethacrylate (TGM-3), trimethacrylate of trimethylolpropane (SR-350), (bis-methacryloyloxyethyl-propoxyphenyl)propane (Bis-GMA), etc. and mixtures thereof.

Isobornylacrylat and dicyclopentadienyltitanium used together with the mass ratio of 0.9 to 1:1 with their total content in the mixture 80-86%. The content of hydroxypropylmethacrylate up 12.4-13.8%TGM-3 and other - 1,6-6/2%.

As the silica filler in the composition is applied crushed bioluminescence glass, quartz and ceramic filler with a particle size of 10-40 μm in the amount of 50-65 wt.%. When this composition should contain a silane sizing up to 2.5 wt.%.

Crushed bioluminescence glass and quartz can also be introduced deliberately treated with sizing in the same amount (50-65% wt.). From Milanovich of coupling agents can be applied vinyltriethoxysilane, γ-aminopropyltriethoxysilane, methacryloxypropyltrimethoxysilane, (bis-methacryloyl-oxyhydroxides)aminopropyltriethoxysilane, 3-methacr is lol-oxopropanenitrile (A-174).

As the thixotropic agent can be used Aerosil with a specific surface area 175-380 m2/, Aerosil can be used in a mixture with additives BYK-410 and Texaphor P-61, which improve the dispersibility of Aerosil in the composition. Texaphor-61 is a modified polyurethane block copolymers .Cognis Gmbh (http://polihimek.s22.ru). BYK-410 - solution of a modified urea functional groups in p-organic fwuc Chemie (www.familyhome.by).

As an antioxidant use p-methoxyphenol, BHT, hydroquinone or other antioxidants of phenol type.

In the composition are known photoinitiator: 1-hydroxycyclohexane (Irgacure-184), 2,2-dimethoxyphenylacetone (Irgacure-651), bis(2,4,6-trimethylbenzoyl)phenylphosphine (Irgacure-819), 2-methyl-1-(4-methylthiophenyl)2-morpholinopropan-1-on (Irgacure-907), etc. and mixtures thereof.

As a promoter of adhesion authors proposed oxalic acid in the amount of 0.5-1.5 wt.%. A significant increase in adhesion strength with its use in the composition of the proposed adhesive compositions appeared for authors unexpected, since its use for these purposes is not found in the patent and scientific literature.

Further details will be described optical read head and the recording/reproducing drive using the above-mentioned UV curable adhesive composition is I. The optical read head of the present invention includes a base and optical elements, which are glued to the base using the above-mentioned UV curable adhesive compositions as an adhesive. The configuration of the optical system in the optical read head of the present invention shown in figure 1.

According to Figure 1, the optical read head includes a light source 1 for emitting light with a predetermined wavelength, the grating 2 for scattering light from the light source into the beam O and the beam 1 - order; collimating lens 3 to create a fiber-optic communication, which are parallel to each other; a lens 9 for forming an optical spot on a recording surface of the optical disk 10; a main light detector 7 for receiving light reflected from the recording surface of the optical disk 10 and of signal detection information and the error signal. Numeral 4 denotes a beamsplitter for directing light emitted by the light source 1, a lens 9, and the light reflected from the optical disk 10 on the main light detector 7. Concave lens 6 may be placed between the coupler 4 and the main light detector 7. Concave lens 6 is used for the correction of astigmatism. The coupler 5 is also responsible for the diffraction of light focused by the lens 9 toward the front detector is Board 8. Front light detector 8 is used to determine the strength of the light. If a certain force of light is less than or exceeds a predefined level, the power of the light emitted from the light source 1 is adjusted to the light with the force of a predetermined level is reached, the optical disk 10.

Figure 2 shows the optical read head in accordance with this invention. The optical read head includes an aluminum base. The above-mentioned optical elements are placed at predefined locations of the framework in order to attach it using UV-curable adhesive compositions of the present invention. For example, the grid 2 is fixed on the holder resetcd basics, the laser diode is fixed on the holder diode substrate and the coupler 5 and the collimating lens is directly attached to the base. UV-curable adhesive composition of the present invention applied to a special place of Foundation or optical elements and for curing exposed to ultraviolet radiation.

Figure 3 demonstrates the application of UV-curable adhesive compositions of the present invention, when the lens is attached to the base in the optical reader head. The lens is attached to the blade actuator (actuator blade) basis. After UV-curable adhesive composition of this image is etenia deposited on a four point blade drive the lens is placed and exposed to ultraviolet radiation for curing this composition.

Figure 4 demonstrates the application of UV-curable adhesive compositions of the present invention, when the coupler is attached to the base in the optical reader head. After UV-curable adhesive composition of the present invention applied to two points of the tap, it is placed on the canvas and is exposed to ultraviolet radiation for curing the composition.

Figure 5 shows the optical reading/ reproducing drive of the present invention. According to Figure 5, the tray 30 is included in the track groove 20 in such a way that slides into or out of the groove in the direction of arrow "A". The tray 30 is equipped with the spindle motor 31 and the base of the grip 33. Spindle motor 31 has a turning circle 32 on its rotating axis. When optical disc 10 is mounted on turntable 32, the spindle motor 31 starts to rotate the optical disc 10. Base capture 33 slides in the radial direction (indicated by arrow "B") of the optical disk 10. The optical read head 40 is attached to the base of the grip 33 to access the recording surface of the optical disk 10 and the recording/reproduction of information.

As can be seen from the above, the UV-curable adhesive composition according to the present invention which corresponds to the requirements for low shrinkage and high adhesion. Adhesion with the base - beautiful. In addition, when the composition of the present invention is used in devices of microelectronics, such as an optical read head, a thin-film transistor - liquid crystal display and an organic electroluminescent elements, does not result in deformation and displacement. Therefore ensured the accuracy of the process. In addition, in the case of adding a thixotropic substance in the polymer composition does not occur, its viscosity is similar to gluten caramel. The result prevented the reduction of electronic devices after applying adhesives on unwanted places.

The present invention is further described by the examples which are given for illustration but not to limit the scope of the claims. In examples No. 1-2 shows ways of getting oligoamenorrhea, preferably used in the composition of the UV curable composition.

Example 1

Synthesis of oligoethercarbonatemethacrylate (OMD-2000 T) OMD-2000 T represents the product of the interaction between the liquid oligonucleotide (copolymers with 1,4 - and 1,2-addition in the ratio of 30:70, M.M. 2000) (Krasol LBH-2000, Cauchy, Czech Republic) with terminal hydroxyl groups, 2,4-toluylene diisocyanate (TDI) and monomethacrylates ether of propylene glycol (MPG), taken in a molar ratio of 1:2:2, in the presence of 0.05 wt.% the catalyst dibutyl is voiceprint (DOC) and 0.01 wt.% inhibitor p-methoxyphenol (MG). The reactor is loaded with 150 g of Krasol LBH-2000 and with stirring, heated to 45-50°C. Then dosed to 23.8 g of TDI at the rate of 1 g/min, the temperature of the reaction mixture should not exceed 55-60°C. At the end of the dosing of the contents of the reactor is maintained at 55-60° ˜2.5 hours until the content of isocyanate groups is 3.3%, and then cooled to 45-50°C. Then dosed into the reactor of 19.7 g of PGM with dissolved in it 0,096 g DOCK within 20 minutes while maintaining a temperature of 50-55°C. After which the reaction mass is heated to 55-60°and kept under stirring for 5-6 hours until complete exhaustion of the isocyanate groups is added 0,0193 g MG and stirred 30 minutes. The product is a colorless or laboratoy viscous mass. Dynamic viscosity Brookfield RVF at 40°at 20 rpm (spindle No. 7) - 134000 MPa·C.

Example 2

Getting algorithmically OMA-3000 T

OMA-3000 T is a product of the interaction of oxypropylated glycerol with terminal hydroxyl groups 3000 mm (Laprol 3003), 2,4-toluylene diisocyanate (TDI) and monomethacrylates ether of propylene glycol (MPG).

Product OME-3000 T get at a molar ratio of initial components Laprol 3003: 2,4-TDI: PGM=1:3:3 in the presence of a catalyst of dibutyltindilaurate (DOC) and an inhibitor of p-methoxime the Ola (MG). The amount of the catalyst is 0.05 wt.% all download. The amount of inhibitor is 0.01 wt.%.

Charged to the reactor 150 g Lapola 3003 and operating the mixer to produce the dosage of 23.9 g of TDI at the rate of 1 g/min, the temperature of the reaction mixture should not exceed 35-55°C.

After dosing the reaction mass is stirred at a temperature of 35-55°C for 2.5-3 hours until the content of 3.7 wt.% isocyanate groups. When the content in the reaction mass of isocyanate groups<3.7 wt.% in the reactor dose of 20.7 g of PGM with pre-dissolved in it 0,097 g catalyst DOCK, within 22 minutes, the Temperature of the reaction mass during the dosage should not exceed 35°C. At the end of dosing, the reaction mass is heated to 50-60°C and maintained under stirring in this mode for 4-6 hours until complete exhaustion of the isocyanate groups. In the absence of isocyanate groups in the product download inhibitor MG and the reaction mixture is stirred at a temperature of 50-60°C for 30 minutes

OMA-3000 T is a homogeneous, colorless or light yellow viscous mass. Dynamic viscosity Brookfield RVF at 40°at 20 rpm (spindle No. 7) - 18000 MPa·C.

Preparation of UV-curable compositions (examples No. 3-8)

The composition was prepared by thoroughly mixing the components presented in t the blitz 1, in the mixer at 20-45°C.

The viscosity of the compositions is 15000-40000 MPa· (25° (C)the coefficient of thixotropy 2-3. Tests of physical and mechanical properties of UV-curable composition

Curing was carried out on UV-installing MS SPORT CURE (Model UIS-25102, Japan).

Determination of strength at separation was performed by a standard method on the Instron tensile testing machine at a speed of 20 mm/min 24 h after bonding to the silica glass samples (50×50×6) mm - steel (12X18H10T) (cylindrical samples, d=25 mm).

Was determined at 25°:I - initial strength
II - strength after aging for 72 hours at 60°C and 95% humidity
III - strength after thermal Cycling (20 cycles) at +70°C (1 hour) ↔ -30°C (1 hour)

Shrinkage was determined by the ratio of the densities of the liquid and of the cured adhesive.

Table 1

Formulation composition
The components of the compositionContent, wt.%
Example 3Example 4Example 5Example 6Example 7Example 8
According to the inventionTo compare
OMD-2000 T5,8the 5.74,010,2the 5.7of 5.4
OMA-3000 T8,79,27,012,89,08/7
Isobornylacrylat7,18,07,06,07,57,5
Dicyclopentadienyltitanium7,48,07,46,27,57,5
Hydroxypropylmethacrylate2,42,32,21,8to 2.572,59
Triethyleneglycoldinitrate1,10,30,50,4951,11,1
Oxalic acid0,71,20,51,5--
Vinyltriethoxysilane0,90,1--0,90,9
Methacryloxypropyltrimethoxy-methylsilane--2,5---
The 3rd is acryloyloxy-ethoxysilane ---1,5--
Acrylic acid-----0,7
Irgacure-1842,33,62,5-3,23,2
Irgacure-6511,20,5-5,0--
Tert.-butylperbenzoate0,20,20,10,50,20,2
Bioluminescence glass58,69---6060
Bioluminescence glass treated with sizing And 174-59,19----
The quartz powder--65,0---
Glass-ceramic filler---50,0--
Aerosil A-1752,71,00,53,51,51,5
Texaphor P-61/td> 0,70,70,60,40,70,7
BYK-4100,1-0,180,10,12-
p-methoxyphenol0,010,01--0,010,01
BHT--0,02---
Hydroquinone---0,005--

Table 2

Curing rate and mechanical characteristics of the hardened compositions
TrackThe cure time, secondsStrength at break, MPaShrinkage, %Hardness (shore D)
IIIIII
Example 35-10of 17.014,0to 12.03,662
Example 45-1018,0to 12.0to 12.03,765
Example 55-10 16,513,011,03,566
Example 65-1015,011,5to 12.03,662
Example 710-153,42,42,03,563
Example 810-1510,27,06,03,562
The placeholder5-15to 12.03,08,05,8-

1. UV-curable adhesive composition containing oligourethanes, of a reactive monomer-diluent, silica filler, organic tertbutylbenzene, thixotropic agent Aerosil and photoinitiator, characterized in that it contains as oligoamenorrhea mixture of oligoamenorrhea two types: the first, obtained by the interaction oligonucleotide with 1000-5000 mm, diisocyanate aliphatic or aromatic structure and monomethacrylate of alkalophilus, and the second based on oligonucleotide with 2000-3000 mm, diisocyanate aliphatic or aromatic structure and monomethacrylate of alkalophiles when the mass ratio of the former to the latter 1.0 to 4.0:1, which additionally contains oxalic acid is as an adhesion promoter, the silane sizing and antioxidant phenolic type in the following components of the composition, wt.%:

the specified oligourethanes11,0-23,0
reactive
the monomer-diluent11,0-24,0
silicate filler50,0-65,0
photoinitiator2,5-5,0
tertbutylbenzene0,1-0,5
thixotropic agent Aerosilof 0.5-3.5
antioxidant phenolic type0,005-0,02
the silane sizing0.1 to 2.5
the adhesion promoter -
oxalic acid0.5 to 1.5

2. The composition according to claim 1, where the monomer-solvent is a mixture consisting of 80-86% of isobutylacetate and dicyclopentadienyltitanium mass ratio of 0.9 to 1:1, hydroxypropylmethacrylate (by 12.4 13.8%) and polyfunctional methacrylic monomer (1.6 to 6.2 percent).

3. The composition according to claim 1, where the silica filler means crushed bioluminescence glass, glass-ceramic filler and quartz with a particle size of 10-40 microns.

4. The composition according to claim 1, where the silica filler means ismelin the e bioluminescence glass, glass-ceramic filler and quartz with a particle size of 1-5 microns, processed celanova the sizing.

5. The optical read head, including the basis and optical elements, which are pasted on the canvas using UV-curable composition according to any one of claims 1 to 4.

6. The optical read head according to claim 5, where the optical elements include an optical diode, grille, collimating lens, a beamsplitter, a reflecting mirror, the light detector, the detector front light, a lens, a concave lens and the main cover.

7. The optical recording/reproducing device includes an optical read head in accordance with article 6.



 

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8 cl, 1 tbl

FIELD: chemistry.

SUBSTANCE: invention concerns method of obtaining polyurethanedi(met)acrylates applicable as binders for powder coatings applied on metal substrates, plastic parts, fiber-reinforced plastic parts. Polyurethanedi(met)acrylates are obtained by interaction of diisocyanate component, diol component and hydroxy-C2-C4-alkyl(met)acrylate at mol ratio of x:(x-1):2, where x takes any value from 2 to 5. 1,6-hexanediisocyanate comprises 50 to 80 mol % of diisocyanate component, and one or two diisocyanates selected out of defined diisocyanate group where mol content of respective diisocyanates amount to 100 mol % comprise(s) 20 to 50 mol %, so that each diisocyanate comprises at least 10 mol % of diisocyanate component. Diol component includes not more than four different diols, and at least one linear aliphatic alpha, omega-C2-C12-diol comprises 20 to 100 mol % of diol component, while at least one (cyclo)aliphatic diol different from linear aliphatic alpha, omega-C2-C12-diols comprises 0 to 80 mol %. Each diol of the diol component comprises at least 10 mol % of diol component, and mol content or respective diols amounts to 100 mol %. Due to the absence of solvent in polyurethanedi(met)acrylate production, further cleaning of end product is not required, thus increasing process product output.

EFFECT: higher acid resistance of coating films applied and solidified with the use of powder coatings containing claimed polyurethanedi(met)acrylates.

6 cl, 15 ex, 3 tbl

FIELD: chemistry.

SUBSTANCE: described is a polyol composition containing polyol (a) and fine resin particles (b), dispersed in the polyol (a), where the fine resin particles (b) are polymer particles obtained by polymerising an ethylene unsaturated monomer (d) and content of particles with diametre of not less than 10 mcm in the fine polymer particles (b) is not greater than 2 vol %. The fine resin particles (b) are particles for which arithmetic standard deviation for particle size distribution per unit volume, obtained based on corresponding values in 85 intervals of the range from 0.020 to 2000 mcm, determined using a particle size distribution analyser through a laser radiation diffraction/scattering method, is not greater than 0.6. The resin has ultimate tensile strength of 1.54-1.65 kgf/cm2 and breaking elongation of 116-123%.

EFFECT: improved mechanical strength parametres.

17 cl, 6 tbl, 24 ex

FIELD: chemistry.

SUBSTANCE: multicomponent aqueous composition contains an aqueous dispersion and a component containing a material having functional groups. The components are mixed with each other before applying the composition onto the substrate. The aqueous dispersion contains a polycarbonate-polyurethane polymer and an acrylic polyol. The aqueous dispersion also contains an organic solvent. The material having functional groups reacts with functional groups of the acrylic polyol and/or polycarbonate-polyurethane polymer. The acrylic polyol has number-average molecular weight from 500 to 4000. The polycarbonate-polyurethane polymer is obtained via a reaction between hydroxy-functional carbonate-containing material and polyisocyanate. The hydroxy-functional carbonate-containing material contains a product of reaction between carbonic acid or derivative thereof and a diol. The diol is hexane-1,6-diol.

EFFECT: composition has low content of volatile substances, as well as high water resistance and hardness.

20 cl, 3 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to a cross-linkable elastomeric thermoplastic polyurethane which does not contain urea, isocyanurate, oxozolinyl, functional side groups capable of radical polymerisation, and having on both ends terminal functional groups capable of radical polymerisation, obtained through reaction of polyfunctional isocyanate, polyfunctional polyol and monool, containing unsaturation and capable of radical polymerisation, and a diol chain extender, where the amount of monool containing unsaturation ranges from 0.001 mol/100 g to 0.016 mol/100 g, preferably from 0.002 mol/100 g to 0.01 mol/100 g of the polymer composition. The invention also describes a method of producing such a thermoplastic polyurethae, a composition containing said polyurethane and a method of cross-linking such a composition, heat-cured polyurethane obtained from thermoplastic polyurethane according to the invention and a method of producing heat-cured polyurethane, as well as use of the disclosed cross-linkable elastomeric thermoplastic polyurethane or composition to make moulded articles, protective films, coatings for motorcars and extruded articles, tubes or cable sheathing.

EFFECT: thermoplastic polyurethane with improved stability at high temperature, wear resistance, creep resistance, dynamic characteristics and resistance to organic solvents.

22 cl, 4 ex, 8 tbl, 4 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to oligomeric urethane acrylates whose molecules contain a statistic average of at least two structural units of general formula I: R{-X-CH2-CH(-CH2-O-(O)-CR1=CH2)[-O-C(O)-NH-]}n, where n is a number from 1 to 6; R is an organic low-molecular or oligomeric radical, from monovalent to hexavalent; X is an oxygen atom or a -C(O)-O- group, a radical which is bonded to radical R through a carbon atom; and R1 is a hydrogen atom or a substituted or unsubstituted alkyl group containing 1-6 carbon atoms. The invention also describes a method of producing said compounds and use thereof as materials which are cured radically through activation with actinic radiation and/or thermal activation or for obtaining such materials.

EFFECT: obtaining novel oligomeric urethane acrylates which are activated with actinic radiation, have low viscosity and enable to obtain coatings with very good mechanical qualities, particularly high hardness, flexibility and deformability, considerable adhesion to different substrates, especially sheet metal, high resistance to the effect of chemical products and atmospheric corrosion, and also having remarkable effect from dull to satin gloss.

26 cl, 14 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: present invention relates to radiation-curable compositions, as well as a coating containing said composition for protecting metal substrates from corrosion. The composition consists of radiation-curable urethane(meth)acrylate with OH number ≥ 10 mg KOH/g, a monofunctional, radiation-curable reactive diluent, an acidic adhesion promoter, a photoinitiator, a multifunctional reactive diluent, radiation-curable resins and other inert additives. The adhesion booster used is phosphoric or phosphonic acid or products of their conversion with functionalised acrylates.

EFFECT: radiation-curable compositions, having good corrosion-protective properties for metal substrates, which are elastic and capable of being well moulded.

15 cl, 2 tbl, 5 ex

FIELD: glue compositions.

SUBSTANCE: invention relates to UV-strengthening glue compositions used for gluing polymethylmethacrylate with metal. Proposed composition comprises oligourethane-acrylate representing product of interaction of oligobutadienediol of molecular mass 2000-3000 Da, aliphatic or aromatic diisocyanate and hydr(o)oxyalkylmethacrylate taken in the molar ratio = 1:2:2, reactive monomer-diluting agent representing a mixture of mono- and polyfunctional methacrylate, polymeric filling agent - polyethylene of high density with particles size below 50 mcm, photoinitiating agent, antioxidant of phenolic type and adhesion promoter - a mixture of chlorinated polyvinyl chloride with chlorine content 62-64 wt.-% and oxalic acid, and the composition comprises additionally thixotropic agent - aerosil with specific surface 175-380 m2/g and ester plasticizing agent. Invention provides the development of UV-strengthening glue composition showing the thixotropy coefficient K = 2-3, shrinkage 4%, not above, break off strength both in the parent state and after heat effect, moisture and temperature drop 1.5 MPa, not less, and stability in storage above one year. The composition can be used as adhesive in electronic devices, such as optical reading head, thin-film transistor - mesomorphic display and organic electroluminescent unit.

EFFECT: valuable properties of composition.

5 cl, 2 tbl, 5 dwg, 8 ex

FIELD: glue compositions.

SUBSTANCE: invention relates to UV-strengthening glue compositions used for gluing substrates metal-silicate glass in electronic devices, such as optical reading head, thin-film transistor - semiconducting mesomorphic display, organic luminescent unit. The composition comprises oligourethaneacrylate - a mixture of oligourethaneacrylates of two type: the first is prepared by interaction of oligooxyalkylenepolyol of molecular mass 1000-5000 Da, diisocyanate of aliphatic or aromatic structure and alkylene glycol monomethacrylate, and the second based on oligobutadienediol of molecular mass 2000-3000 Da, diisocyanate of aliphatic or aromatic structure and alkylene glycol monomethacrylate in the mass ratio of the first to the second = (1.0-4.0):1, reactive monomer as a diluting agent, silicate filling agent, organic tert.-butylperbenzoate, thixotropic agent - aerosil and photoinitiating agent, and, additionally, it comprises oxalic acid as adhesion promoter, silane dressing agent and antioxidant of phenolic type. Invention provides the development of UV-strengthening glue composition possessing thixotropy, high strengthening rate, high adhesion strength being especially at effect of heat and moisture, temperature drop, low shrinkage and stability in storage.

EFFECT: improved and valuable properties of composition.

7 cl, 2 tbl, 5 dwg, 8 ex

FIELD: chemistry.

SUBSTANCE: invention refers to a hot melt adhesive, using it and a method for adhesion of non-woven substrates. The hot melt adhesive is cross-linked by radiation and contains more than 35% of a polyurethane polymer at the hot melt adhesive. The polyurethane polymer in turns contains at least one reactive group polymerising by radiation generated by a reaction of A) reactive PU-prepolymer with a block structure with two or three NCO-groups per a molecule; one block has a structure of diisocyanate-polyol-diisocyanate and at least one block has a structure (diol-diisocyanate)n, wherein polyol=diol or triol with molecular weight (MN) more than 1,000 g/mole, diol=alkylene diol with molecular weight less than 300 g/mole and n is from 4 to 50, and B) is from 20 to 95 mole % of at least one low-molecular compound (B) containing a double bond polymerising by radical polymerisation, and a group reacting with NCO groups, and C) from 0 to 50 mole % of at least one compound (C), which has at least one group reactive to NCO groups, but is free from the groups polymerising under conditions of radical polimerisation with molecular weight from 32 to 4,000 g/mole and D) from 5 to 50 mole % of at least one radical light initiator (D), which has primary or secondary OH-groups; percentages refers to the number of NCO-groups of PU-prepolymer. The sum of B, C, D is supposed to make 100 mole %, and optionally containing additional polymers and/or additives.

EFFECT: producing the adhesive for adhesion of nonwoven substrates or for coating of labels, tapes and plasters with a self-adhesive layer.

20 cl, 6 ex

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