Carpet backing glue as well as preparation method and application thereof

Abstract

The invention provides carpet backing glue as well as a preparation method and application thereof. The carpet backing glue comprises the following components: a water-based acrylic emulsion, a filler, a dispersant, water and a thickener, and the raw material of the acrylic emulsion comprises a compound with a beta-ionone and / or beta-irisone structure. The preparation method comprises the following steps: uniformly stirring and mixing the water-based acrylic emulsion, the dispersing agent, the deionized water, the filler and the thickening agent. The glue is used as carpet backing glue, in particular to backing glue for handmade carpets and machine-made carpets. The glue solves the problem of insufficient tuft pulling-out force and wet stripping force in the preparation of finished carpets.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of acrylic adhesive, in particular relates to a carpet backing adhesive and its preparation method and application. BACKGROUND

[0002] With the improvement of living quality, carpet gradually becomes an indispensable part in indoor decoration. In recent years, the demand for carpet in China is increasing, and carpet is widely used in home, aircraft, hotel, office and other places, and the market size of carpet industry is showing a steady growth trend.

[0003] CN105916954A discloses a carpet backing adhesive prepared by using an ethylene / alpha-olefin interpolymer functionalized with an acid anhydride and / or a carboxylic acid in combination with a specific tackifier, i.e. a VAE adhesive for improving water resistance. However, there are still problems of low hot water wet peeling force and insufficient water resistance in actual customer use.

[0004] CN118184942A discloses a bio-based waterborne polyurethane emulsion for carpet adhesive, carpet adhesive and preparation method, which solves the problems of conventional adhesives, such as strong odor, low flame retardant performance and limited application in carpet. However, the carpet prepared by the adhesive system has low pile pull-out force and backing peeling force, which ultimately leads to short service life of the carpet and carpet shedding.

[0005] In summary, the current carpet backing adhesive field still has the technical problems of low pile pull-out force and insufficient wet peeling adhesion of finished carpet caused by poor adhesive performance, which need to be solved urgently. SUMMARY

[0006] To solve the above technical problems, one of the purposes of the present application is to provide a carpet backing adhesive, which solves the problem of insufficient pile pull-out force and wet peeling force of finished carpet.

[0007] To achieve the above purposes, the present application adopts the following technical solutions:

[0008] A carpet backing adhesive is prepared by using components with the following mass content:

[0009] Waterborne acrylic emulsion 80-150 parts, preferably 90-120 parts,

[0010] Filler 150-250 parts, preferably 180-230 parts,

[0011] Dispersant 0.1-1.0 parts, preferably 0.5-0.8 parts,

[0012] Water 10-30 parts, preferably 15-25 parts,

[0013] Thickener 0.1-0.5 parts, preferably 0.2-0.4 parts;

[0014] The raw material of the acrylic emulsion comprises a compound containing a β-ionone and / or β-ionone structure.

[0015] In the present application, the modified component β-ionone and / or β-ionone added in the synthesis process of the acrylic emulsion can participate in the polymerization of the water-based acrylic resin, the modified component contains a rigid polycyclic ring, which greatly improves the strength of the finished product glue, and further improves the strength of the finished product tuft pull-out force. The dense network structure formed by film forming improves the water resistance of the prepared finished product carpet, and also reduces the strength performance loss caused by the molecular bond rupture of the finished product glue under the condition of heat and humidity. The benzene ring is a large π bond system. Since the π electron system is connected together through continuous conjugate bond, it has a continuous π electron cloud, which increases the stability of the molecule, so it is difficult to carry out addition reaction. The reaction of the β-ionone modified component participating in the polymerization of the acrylic emulsion is as follows:

[0016]

[0017] In an embodiment of the present application, the water-based acrylic emulsion is a modified pure acrylic acrylic emulsion; preferably, the water-based acrylic emulsion acrylic is one or more of methyl methacrylate, n-butyl acrylate and isooctyl acrylate as the main monomer, one or more of hydroxyethyl acrylate, acrylic acid, β-acryloyl propionic acid, acrylamide and methacrylic acid as the functional monomer, and the compound containing a β-ionone and / or β-ionone structure is introduced to generate by emulsion polymerization reaction.

[0018] In an embodiment of the present application, the mass ratio of water-based acrylic acid to the compound containing a β-ionone and / or β-ionone structure in the water-based acrylic emulsion is (800-1200):(30-200), preferably (900-1100):(50-150).

[0019] In an embodiment of the present application, the filler is an inorganic filler, preferably one or more of calcium powder, talc powder and quartz powder; preferably, the filler is a 300-1000 mesh particle.

[0020] In an embodiment of the present application, the dispersant is a surfactant with both lipophilicity and hydrophilicity, preferably an anionic dispersant. For example, Nopco SN-5040 and / or Wanhua Chemical C20.

[0021] In an embodiment of the present application, the thickener is a polyurethane associated thickener. For example, one or more of Wanhua Chemical's U604, U505 and U506.

[0022] Another object of the present application is to provide a preparation method of the aqueous acrylic emulsion.

[0023] A preparation method of the aqueous acrylic emulsion, which is the aqueous acrylic emulsion for the glue as described above, is prepared by emulsion polymerization of a main monomer, a functional monomer, a compound containing a β-ionone and / or β-ionyl structure; preferably, the method drops a pre-emulsion and an initiator into a kettle seed emulsion, and after the reaction is completed, the temperature is lowered and the product is filtered; preferably, the reaction temperature is 83-88℃, and the dropping time is 3-5h. A crosslinking monomer can also be added during the preparation of the emulsion according to the needs, and the crosslinking monomer and its amount are selected according to the conventional method in the art.

[0024] Still another object of the present application is to provide a method for preparing the carpet backing glue.

[0025] A method for preparing the carpet backing glue, which is the carpet backing glue as described above or contains the emulsion prepared by the preparation method as described above, comprises: mixing the aqueous acrylic emulsion, the dispersing agent, the deionized water, the filler and the thickening agent, and adjusting the viscosity of the glue; preferably, the method mixes and stirs the aqueous acrylic emulsion, the dispersing agent, the deionized water, the filler and the thickening agent; preferably, the stirring time is 30-60min, the stirring speed is 400-600r / min, and the viscosity of the glue at 25℃ is adjusted to 20000-40000cps.

[0026] Still another object of the present application is to provide an application of the carpet backing glue.

[0027] An application of the carpet backing glue, which is the carpet backing glue as described above or contains the emulsion prepared by the preparation method as described above, is used as the carpet backing glue, and preferably used as the hand-made carpet and the machine-made carpet backing glue.

[0028] Still another object of the present application is to provide a carpet.

[0029] A carpet, which adopts the carpet backing glue as described above or the carpet backing glue prepared by the method as described above, comprises a surface layer, a backing glue layer, a backing layer and a cushion layer.

[0030] Still another object of the present application is to provide a preparation method of the carpet.

[0031] A preparation method of the carpet, which adopts the carpet backing glue as described above or the carpet backing glue prepared by the method as described above, comprises: coating the carpet backing glue on the surface layer, drying after covering the backing layer to obtain a substrate coated with the carpet backing glue layer, and attaching a PVC or PE cushion layer at the bottom of the substrate to prepare the final carpet product.

[0032] Compared with the prior art, the positive effects of the present application are:

[0033] (1) The finished product prepared by the carpet backing glue has high tuft pull force and excellent performance.

[0034] (2) The finished carpet has good water blister peeling force performance and good effect. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 For the results of Preparation Example 2 1 HNMR qualitative characterization spectrum. DETAILED DESCRIPTION

[0036] The present application will be further described below through specific examples, and the examples described in the present application are only used to illustrate the present application and do not limit the scope of the present application.

[0037] 1. Raw material sources:

[0038] Table 1 Raw materials and sources

[0039]

[0040]

[0041] 2. Water-based acrylic emulsion:

[0042] The preparation process of the water-based acrylic emulsion is as follows:

[0043] First, the main monomer and the functional monomer are mixed, then a compound containing β-ionone and / or β-ionone structure is added to form a mixed monomer, a crosslinking monomer is added as needed, then the mixed monomer, 40g water, 5g 2A1, 5g RS-710 are added to a pre-emulsification kettle, stirred and dispersed for 30min, and a pre-emulsion is prepared;

[0044] 700g water, 3g sodium bicarbonate (buffer) are added to the reaction kettle and stirred and dispersed, 4wt% of the pre-emulsion is added to the reaction kettle, then 1g FeCl3·6H2O catalyst is added and stirred and dispersed, the temperature is raised to 85℃, 5g ammonium persulfate (initiator) dissolved in 100g water is added, and the seed emulsion is prepared after 15min of incubation;

[0045] The remaining pre-emulsion is uniformly added to the seed emulsion within 4h, and 2.5g ammonium persulfate (initiator) dissolved in 100g water is added dropwise within 4h, and after the dropwise addition is completed, the mixture is incubated for 30min; then 2g tert-butyl hydroperoxide, 10g isoascorbic acid 10wt% aqueous solution are added to the reaction kettle, and the mixture is incubated for 1h; when the temperature is reduced to below 40℃, the water-based acrylic emulsion is obtained by filtration.

[0046] Preparation Example 1

[0047] (1) Waterborne pure acrylic emulsion 1, with 530 g of methyl methacrylate MMA, 340 g of butyl acrylate BA and 100 g of isooctyl acrylate EHA as main monomers, 6 g of acrylic acid AA, 6 g of hydroxyethyl acrylate HEA as functional monomers, 5 g of acetoacetoxy methacrylate AAEM crosslinking monomer, 100 g of β-ionone emulsion polymerization.

[0048] Preparation Example 2

[0049] (2) Waterborne pure acrylic emulsion 2, with 510 g of methyl methacrylate MMA, 450 g of butyl acrylate BA as main monomers, 10 g of methacrylic acid MAA, 20 g of hydroxyethyl methacrylate HEA as functional monomers, 20 g of diacetone acrylamide DAAM crosslinking monomer, 200 g of β-ionone.

[0050] Preparation Example 3

[0051] (3) Waterborne pure acrylic emulsion 3, with 600 g of methyl methacrylate MMA, 330 g of butyl acrylate BA, 80 g of isooctyl acrylate EHA as main monomers, 8 g of acrylic acid AA, 10 g of β-acryloxypropionic acid β-CEA as functional monomers, 15 g of diacetone acrylamide DAAM crosslinking monomer, 50 g of β-ionone emulsion polymerization.

[0052] Preparation Example 4

[0053] (4) Waterborne pure acrylic emulsion 4, with 420 g of methyl methacrylate MMA, 520 g of butyl acrylate BA, 80 g of isooctyl acrylate EHA as main monomers, 18 g of acrylic acid AA, 10 g of β-acryloxypropionic acid β-CEA as functional monomers, 150 g of β-ionone emulsion polymerization.

[0054] Preparation Example 5

[0055] (5) Waterborne pure acrylic emulsion 5, with 520 g of methyl methacrylate MMA, 340 g of butyl acrylate BA and 100 g of isooctyl acrylate EHA as main monomers, 18 g of acrylic acid AA, 7 g of hydroxyethyl acrylate HEA as functional monomers, 10 g of diacetone acrylamide DAAM crosslinking monomer, 40 g of β-ionone emulsion polymerization.

[0056] Preparation Example 6

[0057] (6) Waterborne pure acrylic emulsion 6, prepared by emulsion polymerization of 580 g of methyl methacrylate MMA, 320 g of butyl acrylate BA, 80 g of isooctyl acrylate EHA as main monomers, 15 g of acrylic acid AA as functional monomer, 10 g of acetoacetoxy ethyl methacrylate AAEM crosslinking monomer, 10 g of β-irone and 20 g of β-ionone.

[0058] Preparation Example 7

[0059] (7) Waterborne pure acrylic emulsion 7, prepared by using 530 g of methyl methacrylate MMA, 430 g of butyl acrylate BA as main monomers, 10 g of methacrylic acid MAA as functional monomer, 13 g of acetoacetoxy ethyl methacrylate AAEM crosslinking monomer, 80 g of β-irone.

[0060] Preparation Example 8

[0061] (8) Waterborne pure acrylic emulsion 8, prepared by emulsion polymerization of 520 g of methyl methacrylate MMA, 450 g of butyl acrylate BA and 100 g of isooctyl acrylate EHA as main monomers, 13 g of acrylic acid AA, 9 g of hydroxyethyl acrylate HEA as functional monomer, 8 g of diacetone acrylamide DAAM crosslinking monomer, 140 g of β-ionone.

[0062] Preparation Example 9

[0063] (9) Waterborne pure acrylic emulsion 9, prepared by emulsion polymerization of 550 g of methyl methacrylate MMA, 500 g of butyl acrylate BA, 80 g of isooctyl acrylate EHA as main monomers, 10 g of acrylic acid AA, 10 g of β-acryloxypropionic acid β-CEA as functional monomer, 14 g of diacetone acrylamide DAAM crosslinking monomer, 120 g of β-ionone.

[0064] Table 2 Acrylic emulsion polymerization process conditions

[0065] Scheme FeCl3-6H2O / g Reaction temperature / °C Dropwise addition time / h Preparation 1 1 85 4 Preparation 2 1.5 85 4.5 Preparation 3 1.5 83 3 Preparation 4 2 84 3.5 Preparation 5 2.3 88 4 Preparation 6 0.8 86 5 Preparation 7 2 87 3.5 Preparation 8 2.5 85 3 Preparation 9 0.5 84 4.5

[0066] 3. Test method

[0067] (1) Sample preparation: use A2 spatula to evenly coat the carpet backing glue on the back of the carpet, the glue amount is 1 kg / m 2 Attach the backing layer and place it in a 150°C oven for 10 minutes. After drying, place the prepared sample in a constant temperature and humidity chamber for 24 hours.

[0068] (2) Carpet tuft pull-out force: according to GB / T1090-2019 carpet pull-out force test method.

[0069] (3) Carpet backing dry peel strength: according to GB / T26843 carpet backing peel strength test.

[0070] (4) Wet peel force of carpet backing: The prepared sample was cut into 5 cm wide sample according to warp and weft direction respectively, and then was put into 80°C hot water for 1 min, and then was taken out and placed at room temperature for 10 min. The 5 cm wide backing peel force was tested according to the dry peel force method.

[0071] (5) Viscosity: The viscosity was tested using Brookfield, LV viscometer at 64# / 12 rpm, 25°C.

[0072] 4. NMR characterization

[0073] The emulsion of Preparation Example 2 was subjected to 1 HNMR characterization

[0074] Instrument: MERCURY plus 500 type

[0075] Manufacturer: Varian Company, USA

[0076] Solvent: DMSO

[0077] Frequency: 400 MHz

[0078]

[0079] The emulsion of Preparation Example 2 was subjected to 1 HNMR characterization, and the results are shown in the attached Figure 1 It can be seen that there is a large amount of hydrogen in the chemical shift of 0-2 ppm, which can indicate the presence of hydrogen in the above saturated hydrocarbon. The chemical shift of olefin is at 6.5-8 ppm, and the chemical shift of hydrogen at position 1 moves to low field under the influence of double bond to 5.37 ppm. The chemical shift of DMSO is at 2.5 ppm. Position 2 appears a chemical shift at 4.06 ppm under the influence of ester bond.

[0080] Examples 1-9

[0081] Examples 1-9 were respectively prepared using aqueous emulsions 1-9 according to the glue proportioning ratio and stirring process of Table 3, and the performance was tested.

[0082] Table 3 Glue proportioning ratio (unit / g)

[0083]

[0084] Comparative Example 1

[0085] Comparing with Example 2, the difference is that β-ionone is removed from emulsion 2, and the other amounts in the formula remain unchanged, to obtain emulsion 10. The glue was proportioned according to Table 4.

[0086] Comparative Example 2

[0087] Comparing with Example 6, the difference is that β-ionone and β-ionone in emulsion 6 are removed, and other amounts of the formulation remain unchanged to obtain emulsion 11, and the glue is prepared according to Table 4.

[0088] Table 4 Performance test

[0089]

[0090] From the data, it can be seen that the backside peeling force (dry) of the glue prepared into finished carpet by Examples 1-9 is much better than that of Comparative Examples 1 and 2. The performance of Comparative Examples 1 and 2 is significantly reduced in pile pull-out force and after soaking performance, and the soaking performance is unqualified compared with Example 2 and Example 6.

Claims

1. A carpet backing adhesive characterized by, The carpet backing adhesive is prepared by using components with the following mass content: water-based acrylic emulsion 80-150 parts, preferably 90-120 parts, filler 150-250 parts, preferably 180-230 parts, dispersant 0.1-1.0 parts, preferably 0.5-0.8 parts, water 10-30 parts, preferably 15-25 parts, thickening agent 0.1-0.5 parts, preferably 0.2-0.4 parts; The raw material of the acrylic emulsion comprises a compound containing β-ionone and / or β-ionone structure.

2. The glue of claim 1, wherein, The water-based acrylic emulsion is a modified pure acrylic acrylic emulsion. Preferably, the water-based acrylic emulsion acrylic is one or more of methyl methacrylate, n-butyl acrylate and isooctyl acrylate as the main monomer, one or more of hydroxyethyl acrylate, acrylic acid, β-acryloyl propionic acid, acrylamide and methacrylic acid as the functional monomer, and the compound containing β-ionone and / or β-ionone structure is introduced to generate by emulsion polymerization reaction. And / or, the mass ratio of water-based acrylic acid to compound containing β-ionone and / or β-ionone structure in the water-based acrylic emulsion is (800-1200):(30-200), preferably (900-1100):(50-150).

3. The glue according to claim 1 or 2, characterized in that, The filler is an inorganic filler, preferably one or more of calcium powder, talc powder and quartz powder. Preferably, the filler is a 300-1000 mesh particle.

4. The glue according to any one of claims 1-3, characterized in that, The dispersant is a surfactant with both lipophilicity and hydrophilicity, preferably an anionic dispersant.

5. The glue according to any one of claims 1-4, characterized in that, The thickening agent is a polyurethane associated thickening agent.

6. A method for preparing an aqueous acrylic emulsion, which is an aqueous acrylic emulsion for use in the glue according to any one of claims 1 to 5, characterized by, The emulsion is prepared by emulsion polymerization of the main monomer, the functional monomer and the compound containing β-ionone and / or β-ionone structure; Preferably, the method drops the pre-emulsion and the initiator into the seed emulsion at the bottom of the kettle, and after the reaction is completed, the temperature is lowered and the material is filtered out; preferably the reaction temperature is 83-88℃, and the dropping time is 3-5h.

7. A process for preparing a carpet backing adhesive, said adhesive being a carpet backing adhesive according to any one of claims 1 to 5, or comprising an emulsion prepared by the process according to claim 6, characterized in that, The method comprises: mixing the water-based acrylic emulsion, the dispersant, the deionized water, the filler and the thickening agent after stirring, and adjusting the viscosity of the adhesive; Preferably, the method mixes and stirs the water-based acrylic emulsion, the dispersant, the deionized water, the filler and the thickening agent; preferably the stirring time is 30-60min, the stirring speed is 400-600r / min, and the viscosity of the adhesive is adjusted to 20000-40000cps at 25℃.

8. An application for preparing a carpet backing adhesive, the adhesive being the carpet backing adhesive according to any one of claims 1-5, or comprising the emulsion prepared by the preparation method of claim 6, the adhesive being used as a carpet backing adhesive, preferably as a hand-made carpet and machine-made carpet backing adhesive.

9. A carpet employing the carpet backing adhesive of any one of claims 1-5, or the carpet backing adhesive prepared by the method of claim 7, characterized in that, The carpet comprises a surface layer, a backing adhesive layer, a backing layer and a cushion layer.

10. A method of making a carpet using the carpet backing adhesive of any one of claims 1-5, or the carpet backing adhesive made using the method of claim 7, wherein, The preparation method coats the carpet backing adhesive on the surface layer, dries after covering the backing layer to obtain a substrate coated with a carpet backing adhesive layer, and attaches a PVC or PE cushion layer to the bottom of the substrate to prepare the final carpet product.

Images