Adhesive polyurethane composition

FIELD: chemistry.

SUBSTANCE: adhesive polyurethane composition consists of a prime coat and polyurethane adhesive, comprising urethane rubber and ethyl acetate, applied on its surface. The prime coat consists of a solution of polyurethane thermoplastic elastomer with ethyl acetate in ratio: polyurethane thermoplastic elastomer 10-18 wt % and ethyl acetate - the balance. The polyurethane adhesive contains a solution of polyurethane thermoplastic elastomer and a mixture of polar organic solvents consisting of ethyl acetate and methylene chloride, with the following ratio of components: polyurethane thermoplastic elastomer 17-27 wt %; methylene chloride 7-10 wt % and ethyl acetate - the balance. The polyurethane adhesive can contain perchlorovinyl resin as a target additive in amount of 0-10% to the total weight of the adhesive.

EFFECT: low cost and improved adhesion properties of the adhesive composition and cohesion strength characteristics of the adhesive joints.

2 cl, 2 tbl

 

The invention relates to the field of chemistry, in particular to polyurethane adhesive compositions, and can be used in the Shoe industry.

Known single-layer adhesive composition for bonding the bottom of a Shoe with uppers of synthetic, synthetic and natural leather, containing urethane rubber Desmocoll based on polyesters 15-16%, the polyisocyanate 1.5 to 2.5%, monoalkylphenols ether glycol 0.04 to 0.50% and the ethyl acetate else. Characteristics adhesive strength of the adhesive joint 44-73 N/cm, the nature of isolation - rubber and the upper layer of the skin. The composition reduces urethane rubber Desmocoll up to 40% with ensuring the strength of the adhesive joint when using the top from different kinds of leather (Patent RU №2047637 C1 invention. Adhesive composition for bonding the bottom of a Shoe with uppers of synthetic, synthetic and natural leather. - IPC6C09J 175/06. - Publ. 10.11.1995).

Known single-layer adhesive composition for bonding parts of the Shoe upper to the sole material containing a dispersion of a polyurethane based on 2,4-toluylene diisocyanate, polybutylcyanoacrylate and 2,2-bis/hydroxymethylene/propionic acid ratio of 1:2-3:1-1,5, water, a primary amine, N-methyl-2-pyrrolidone. The proposed structure of the adhesive composition increases the stability in time of the composition and strength of adhesives is x connections of parts of footwear (Patent RU №2114146 C1 invention. The adhesive composition. - IPC6C09J 175/04, C08G 18/66. - Publ. 27.06.1998).

Known single-layer polyurethane adhesive composition for bonding metals, concrete, footwear, leather and other, containing the following ratio of components, parts by weight: a simple oligoether based on ethylene oxide and propylene oxide mol. m 4500-6000 - 17-28; N,N,N',N'-tetrahydroxyphenylchlorin 35-57; flexible polyurethane foam waste 15-50, isocyanate 30-50 and an organic solvent 195-350. The proposed polyurethane adhesive composition increases bond strength, reduces the cost of the composition and improves the ecology of the environment (Patent RU №2139313 C1 invention. Polyurethane adhesive composition. - IPC6C09J 175/08. - Publ. 10.10.1999).

Known single-layer polyurethane adhesive composition for bonding metals, concrete, leather, wood, and other, including parts: 20-60 castable polyurethane or waste production of molded polyurethane, 80-40 ∈-caprolactam, 5-50 isocyanate and 100-300 and organic polar solvent. The proposed polyurethane adhesive composition increases the adhesive strength of the bonding of the substrates, and also reduces the environmental pollution due to waste disposal production of molded polyurethane (Patent RU №2391374 C1 invention. Polyurethane adhesive composition. - IPC C09J 175/04, C08L 75/04, C08G 18/10. - Publ. 10.06.2010).

<> Known single-layer adhesive composition based on a mixture of ester urethane rubbers in the following ratio: Desmocoll-540 13,37-17,71 and Desmocoll-406 1,48-1,97 in the total number of 14,85-19,68 wt.%; the curing agent is a polyisocyanate, Desmodur RFE 1.5 to 2.0 wt.%; stabilizing additives (antioxidants) in the form of malonic acid 0,81-to 0.72 wt.% and Tinuvin V 0,09-0,12 wt.%, the rest of the solvent includes wt.%: toluene 3,84-4,78, IEC (staatiliste) 0,81-0,72 ethyl acetate : 1,81-2,15 and acetone - rest. (Application RU # 2003120847 AND invention. The adhesive composition based on polyurethane rubber. - IPC7C09J 175/06. - Publ. 27.01.2005).

Known single-layer adhesive composition based on a mixture of ester urethane rubber for bonding the bottom of a Shoe with uppers of synthetic, synthetic and natural leather, containing, wt.%: 8,5-15,5 urethane rubber stamps Desmocoll-540 (moderately viscid) with a viscosity of not more than 1600 centipoise, 3,5-4,5 urethane rubber stamps Desmocoll-540 (low viscosity) with a viscosity of not more than 890 SDR and 1,3-2,2 urethane rubber stamps Desmocoll-406, when the mass ratio of the two types of rubbers Desmocoll-540 and Desmocoll-406 equal to 9:1. This composition contains, wt%: 0,1-0,2 malonic acid, 0.05 to 0.1 tinuvin P, 1,5-2,0 MDI brand Desmodur RFE as a hardener, and the rest is a mixture of solvents containing, wt.%: 3,8-5,0 toluene, 0.7 to 0.8 IEC (mutilate the ketone), 1.8-2.2 ethyl acetate and the rest of the acetone. This adhesive composition does not require the introduction of hardener before use, which simplifies the technology of its application, has stable characteristics throughout the life cycle, and also provides increased strength of the adhesive joint and allows pasting articles from thermoplastic and PVC (Patent RU №2405017 C2 invention. The adhesive composition based on polyurethane rubber. - IPC C09J 175/06, AV 9/12. - Publ. 27.11.2010).

Known single-layer adhesive composition based on a mixture of ester urethane rubbers containing, wt.%: Desmocoll-540/4 12-16, Desmocoll-540/2 1-3, Desmocoll-406 0.5 to 1.5, the target additive Aerosil 200 0,2-1,0, stabilizing additives malonic acid is 0.1-0.2, tinuvin V 0.05 to 0.08 and the rest of the solvent comprising acetone 58-74, ethyl acetate 2-10 and toluene 4-8 (Application RU # 2009139512 AND invention. The adhesive composition. - IPC C09J 175/06. - Publ. 10.05.2011).

A disadvantage of the known single-layer adhesive compositions is poor adhesion with a single application of polyurethane adhesive due to the low adhesion ability of the surfaces to be glued products.

Known composition for primer, comprising at least one polyurethane prepolymer And isocyanate groups; at least one aliphatic polyisocyanate; at least one aroma is systematic polyisocyanate; at least one reaction product D obtained from at least one of epoxysilane and at least one aminosilane when the number ratio of atoms of active amine hydrogen to the number of epoxy groups of epoxysilane equal to 3:1-1:3, or from at least one of epoxysilane and at least one mercaptoethane when the proportion of mercaptopropyl and epoxy groups of 1.5:1-1:1,5, when the content of the product D of 0.5-15 wt.% calculated on the total weight of A+B+C+D. the Composition is used as a primer for adhesives, sealants and flooring. The technical result - good adhesion to the problematic substrates with large outdoor time (Patent RU №2393188 C2 invention. Primer with a large outdoor time for polymer substrates. - IPC C09D 175/04, C08J 7/04, C09J 175/04, SC 3/10. - Publ. 27.06.2010). A disadvantage of known composition is insufficient cohesion of the adhesive joint and adhesion to the workpiece-top shoes and plantar compositions.

The closest analogue is a two-layer polyurethane adhesive composition comprising a double smearing the edges of the billet uppers with polyurethane adhesives to increase the strength of attachment of the bottom molding soles to the uppers. When you first apply glue pasting 8-10% concentration, followed by drying of the adhesive layer in estestvennonauchn within 3-5 minutes The second pasting produce glue 20-22% concentration, followed by drying of the adhesive layer within 3-6 min with the intensified stage of drying for 1 min air flow with a temperature of 60-65°C at a flow rate of air 3-4 m/s and a step of drying in natural conditions within 2-5 minutes Before closing molds and sticking to the bottom workpiece shoes are thermal activation of the adhesive film for 5-8 with due submission on the trail of the workpiece shoes air stream heated to a temperature of 110-140°C. (Patent RU №2290852 C1 invention. Method of improving the strength of molded fastening the bottom to the top of the shoes. - IPC AV 9/18, B29D 31/512, A43D 86/00. - Publ. 10.01.2007). This technical solution adopted for the prototype.

The main disadvantage of known composition is the complexity of the buttering layers for bonding associated with high temperature drying, insufficient cohesive strength of adhesive bonding soles with upper material due to insufficient adhesion, leading to the formation of an unsized sites.

The main task, which is aimed by the invention is the improvement of adhesion and cohesive strength of adhesive bonding of the sole with the upper material of the Shoe which does not have sufficient adhesion.

The technical result achieved in the implementation of the claimed invention, I what is the cost and increase the adhesion properties of the adhesive composition, and cohesive strength properties of adhesive joints.

This technical result is achieved by the fact that in the known polyurethane adhesive composition consisting of a primer and applied to its surface polyurethane adhesive containing a urethane rubber and ethyl acetate, in accordance with the proposed technical solution,

the primer consists of a solution of polyurethane thermoplastic elastomer in ethyl acetate in the following ratio, wt.%:

polyurethane thermoplastic elastomer10-18
the ethyl acetatethe rest,

and polyurethane adhesive contains a solution of a polyurethane thermoplastic elastomer in a mixture of polar organic solvents consisting of ethyl acetate and methylene chloride, in the following ratio, wt.%:

polyurethane thermoplastic elastomer17-27
methylene chloride7-10
the ethyl acetateelse;

polyurethane adhesive as the target of the additive may contain perchlorovinyl resin in the amount of 0-10 wt.% the total mass of the adhesive.

Conducted by the applicant's analysis of the level of technology has allowed to establish that the analogs are characterized by the sets of characteristics is identical for all features of the declared polyurethane adhesive compositions are absent. Therefore, the claimed technical solution meets the condition of patentability "novelty".

Search results of known solutions in this field of technology in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the proposed technical solution, showed that they do not follow explicitly from the prior art. Of certain of applicant's prior art there have been no known impact provided the essential features of the proposed technical solution of transformations on the achievement of the technical result. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

The essence of the claimed invention is as follows.

Adhesive polyurethane composition is a two-layer adhesive composition consisting of a polyurethane primer and applied on its surface with polyurethane glue.

The primer contains the following components in the ratio, wt.%:

polyur tanouye TPR 10-18
the ethyl acetaterest

Polyurethane adhesive contains the following components in the ratio, wt.%:

polyurethane thermoplastic elastomer17-27
methylene chloride7-10
the ethyl acetaterest

Polyurethane adhesive as the target of the additive may contain perchlorovinyl resin in the amount of 0-10 wt.% to the total mass of the adhesive.

In accordance with the invention, the polyurethane adhesive composition is prepared as follows.

Primer and polyurethane adhesive is prepared separately from each other and Packed in appropriate containers. As a polyurethane thermoplastic elastomer used a pre-shredded urethane rubber stamps UK-1.

The primer was prepared as follows.

In triggerlevel flask equipped with stirrer and heating the water jacket, downloaded 20 g of urethane rubber stamps UK-1 as a polyurethane thermoplastic elastomer and 180 g of ethyl acetate. In the flask were created nitrogen cushion with pressure Phouses=0,2÷0,3 ATM, and the shirt was applied to the fluid, p is Eva heating the contents of the flask to a temperature of 45±2°C, then led components are mixed by a stirrer flasks for 24÷48 h until complete dissolution of urethane rubber, bldg 1. Unloading polyurethane primer conducted at a temperature of 42±2°C in tightly closed plastic container.

The obtained polyurethane primer were tested, quality indicators which are listed in table 1.

Table 1
№ p/pName quality scoreNormaTest method
1AppearanceViscous-fluid mass from light to amber color without mechanical impurities.visually
2Mass fraction of non-volatiles, %10-18according to GOST 2199-78
3Viscosity by viscometer VZ-246 (nozzle diameter of 6 mm) at a temperature of 20°C50-150according to GOST 8420-74

Polyurethane adhesive was prepared as follows.

In triggerlevel flask equipped interfere with the Oh and warming the water jacket, loaded with 30 g of urethane rubber stamps UK-1 as a polyurethane thermoplastic elastomer, 105 g of ethyl acetate and 15 g of methylene chloride. In the flask has created a nitrogen cushion with pressure Phouses=0,2÷0,3 ATM, and jacketed flask was filed coolant, providing heating the contents of the flask to a temperature of 35±2°C, after which the led components are mixed by a stirrer flasks for 24÷48 h until complete dissolution of urethane rubber, bldg 1. When operating the stirrer in the flask was added to 10.5 g perchlorovinyl resin and continued the process of dissolution at a temperature of 35±2°C, which led the process of dissolution perchlorovinyl resin for 4÷5 hours Unloading polyurethane adhesive conducted at a temperature of 35±2°C in tightly closed plastic container.

The obtained polyurethane adhesive was tested, quality indicators which are given in table 2.

Table 2
№ p/pName quality scoreNormaTest method
1AppearanceViscous-fluid mass from light to amber color without mechanical impurities. visually
2Mass fraction of non-volatiles, %17-27according to GOST 2199-78
3Viscosity by viscometer VZ-246 (nozzle diameter of 6 mm) at a temperature of 20°C190-300according to GOST 8420-74

The strength of adhesive joints on the delamination was established method of determining bond strength between the layers of rubber - leather, rubber - leather, rubber - fabric and rubber - rubberized fabric by determining the force required to separate two subjects layers from each other according to GOST 676875 (rubber and rubberized fabric. Method for determining the bond strength between the layers when the bundle). First pasting the edges of the top of the prepared samples was produced polyurethane primer, followed by drying at 2-5,5 min depending on material bonded samples at a temperature of 23±2°C. On the surface of the primer was applied a second pasting a polyurethane adhesive, followed by drying over 2,25-7,0 min at a temperature of 23±2°C. the Bonded samples were kept for 24 h at a temperature of 23±2°C and relative humidity of 50-70%. The bonding strength between the layers exfoliated samples harvested from the Tawil of not less than 5 kN/m, that corresponds to the best world samples.

The proposed adhesive polyurethane composition has a low cost and is not inferior in performance to the known properties of the adhesive compositions.

1. Adhesive polyurethane composition consisting of primer and applied to its surface polyurethane adhesive containing a urethane rubber and ethyl acetate, wherein the primer consists of a solution of polyurethane thermoplastic elastomer with ethyl acetate in the following ratio, wt.%:

polyurethane thermoplastic elastomer10-18
the ethyl acetaterest

and polyurethane adhesive contains a solution of a polyurethane thermoplastic elastomer in a mixture of polar organic solvents consisting of ethyl acetate and methylene chloride, in the following ratio, wt.%:
polyurethane thermoplastic elastomer17-27
methylene chloride7-10
the ethyl acetaterest

2. Adhesive polyurethane composition according to claim 1, characterized in, is that polyurethane adhesive as the target of the additive may contain perchlorovinyl resin in the amount of 0-10 % by total weight of the adhesive.



 

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where A does not contain active hydrogen and a primary amine group, or together with R7 denotes a (n+2)-valent hydrocarbon radical containing 3-20 carbon atoms and, if necessary, at least one heteroatom in form of oxygen of an ether group or nitrogen or a tertiary amine group; n equals 1, 2, 3 or 4; m equals 0,1, 2, 3 or 4; R1 and R2 each denotes a univalent hydrocarbon residue with 1-12 carbon atoms or together denote a divalent hydrocarbon radical which is part of a carbocyclic ring with 5-8 carbon atoms; R3 denotes H or alkyl; R4 and R5 independently denote CH3 or a univalent aliphatic radical containing 2-12 carbon atoms and optionally hydroxy groups; X denotes O, S, N-R6, or N-R7, where R6 denotes a univalent hydrocarbon radical containing 1-20 carbon atoms and having at least one hydroxy group; as well as curable compositions containing such aldimines and use of said compositions.

EFFECT: obtaining novel aldimines which can be used as curing agents in curable compositions.

22 cl, 18 ex, 6 tbl

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9 cl, 1 tbl, 2 ex

FIELD: machine-building industry.

SUBSTANCE: invention relates to the method of encapsulating o-rings manufacture for installing them between parts and units of internal combustion engines, between flange connections in chemical industry, for finishing, noise-insulating and thermal insulating panels. The method provides for grinding cork wastes to 0.5-5.0 mm. The cork wastes are mixed up with binding material based on a mixture of urethane and butadiene-acrylo-nitric rubber taken in a weight ratio 10-90:10-90. After rubber mixing with binding material, the mixture is moulded at 143-151°C and 3-10 MPa during 20-60 min. Then it is exposed at room temperature during one day. The sheets of the material are then slit and needed items are cut out. Wastes from cork, shoe and prosthetic and orthopedic production, wastes from finishing, noise and thermal insulating production, proper substandard wastes, flash chipping wastes are used as grinded cork wastes which are taken separately or in any ratios between each other.

EFFECT: invention allows for increasing reliability of o-rings and obtaining multifunctional material.

5 tbl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a curable composition consisting of two parts, which is stable during storage in form separate parts and solidifies when merged to obtain an essentially homogeneous polyurethane-polysiloxane mixture. Said composition contains (a) a first dry part containing a moisture-curable silylated polyurethane resin obtained (i) by reacting a polyurethane prepolymer with terminal isocyanate groups with at least one silane selected from a group consisting of mercaptosilaine and aminosilane, and a cross-linking agent for diorganopolysiloxane with terminal silanol groups; (b) a second part containing diorganopolysiloxane with terminal silanol groups; (c) a catalyst for condensation in the first and/or second part; and possibly (d) at least one additional component selected from a group consisting of diorganopolysiloxane with terminal alkyl groups, filler, a UV stabiliser, an antioxidant, an adhesion promoter, a curing accelerator, a thickener, a plasticiser, a moisture absorber, a pigment, a dye, a surfactant, a solvent and a biocide; where the additional component is present in the first and/or second parts of the composition depending on the part with which it is compatible. The invention also describes an essentially homogeneous polyurethane-polysiloxane mixture used as a sealant, adhesive or coating, obtained during solidification as a result of merging the first and second parts of said composition.

EFFECT: obtaining a composition consisting of two parts, which is stable during indefinite storage but undergoes fast solidification upon merging the two parts to obtain a polyurethane-polysiloxane mixture with good weather resistance and high heat resistance.

13 cl, 5 ex, 2 tbl

Thin condom // 2434896

FIELD: chemistry.

SUBSTANCE: condom contains natural rubber and polyurethane in form of a mixture. Preferably, the condom has single wall thickness of less than 55 mcm and burst pressure of 1.0 kPa or higher. The method of making the condom involves mixing polyurethane latex and natural rubber latex and forming a condom from said mixture.

EFFECT: invention enables to reduce wall thickness of the condom while satisfying burst pressure requirements.

26 cl, 5 dwg, 1 tbl

FIELD: medicine.

SUBSTANCE: present invention refers to cosmetology, more specifically concerns a polymeric ingredient consisting of one polymer or of a number of various polymers, and containing at least one polyurethane; said polymer or at least one of said polymers contain acid groups which are neutralised at least by 40 % at least with one inorganic base and at least by 1 % with triethanolamine. Besides, the invention refers to a cosmetic agent which contains such polymeric ingredients, and also to a method of modification of mechanical properties of the polymeric ingredient by acid group neutralisation at least by 40 % at least with one inorganic base and at least by 1 % with triethanolamine.

EFFECT: invention provides the polymeric ingredients appropriate for making cosmetic agents exhibiting good film-forming properties, and also enables adjusting their mechanical properties, particularly elasticity, and especially a hardness to elasticity relation, to the intended application.

10 cl, 25 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: composition contains the following in pts.wt: 100 - copolymer of butadiene and piperylene with molecular weight 1200-3200 and content of hydroxyl groups 0.8-1.1%, 20-polymethylene polyphenyl isocyanate with content of isocyanate groups 29-31%, 70-100 - rubber crumbs, and 25-20 - high-molecular polyethylene with molecular weight 30000-800000.

EFFECT: high dynamic and physical-mechanical properties of the composition based on the filled foamed polyurethane.

1 ex, 2 tbl

FIELD: chemistry.

SUBSTANCE: composition contains the following in wt %: 8.5-15.5 Desmocoll 540 (medium-viscosity) urethane rubber with viscosity of not more than 1600 cP, 3.5-4.5 Desmocoll 540 (low-viscosity) urethane rubber with viscosity of not more than 890 cP and 1.3-2.2 Desmocoll 406 urethane rubber, with weight ratio of Desmocoll 540 to Desmocoll 406 rubber equal to 9:1. The composition also contains the following in wt %: 0.1-0.2 malonic acid, 0.05-0.1 tinuvin B75, 1.5-2.0 Desmodur RFE polyisocyanate as a curing agent and a mixture of solvents - the rest. The mixture of solvents contains the following in wt %: 3.8-5.0 toluene, 0.7-0.8 methylethylketone, 1.8-2.2 ethylacetate and acetone - the rest.

EFFECT: said adhesive composition does not require addition of a curing agent before use, which simplifies technology of its application, composition has stable characteristics in the entire life cycle, ensures high strength of the glue joint and enables gluing of articles made from thermoplastic and PVC.

2 tbl

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