CURABLE ACRYLIC COMPOSITION, ACRYLIC TAPE, ACRYLIC RUBBER ROLL AND METHOD FOR PREPARING THE ACRYLIC RUBBER ROLL

Abstract

Disclosed is a method for preparing an acrylic rubber roll. The method includes mixing and stirring 50-77 wt % 2-ethylhexyl acrylate, 2-10 wt % acrylic acid, 20-40 wt % 2-hydroxyethyl acrylate, and 0.1-0.5 wt % curing agent at room temperature to form a mixture; adding 0.1-0.2 wt % photoinitiator into the mixture, and continuing to stir until the photoinitiator is fully dissolved in order to form an acrylic composition; irradiating the acrylic composition with UV light to crosslink and cure the acrylic composition in order to obtain an acrylic tape; and cutting the acrylic tape according to a size of a plastic rubber roll shaft, and evenly sticking the acrylic tape to a freely-rotatable rubber roll while avoiding air bubbles so as to obtain the acrylic rubber roll.

Claims

1. A method for preparing an acrylic rubber roll, comprising: mixing and stirring 50-77 wt % 2-ethylhexyl acrylate, 2-10 wt % acrylic acid, 20-40 wt % 2-hydroxyethyl acrylate, and 0.1-0.5 wt % curing agent at room temperature to form a mixture; adding 0.1-0.2 wt % photoinitiator into the mixture, and continuing to stir until the photoinitiator is fully dissolved in order to form an acrylic composition; irradiating the acrylic composition with UV light to crosslink and cure the acrylic composition in order to obtain an acrylic tape; and cutting the acrylic tape according to a size of a plastic rubber roll shaft, and evenly sticking the acrylic tape to a freely-rotatable rubber roll while avoiding air bubbles so as to obtain the acrylic rubber roll.

2. An acrylic tape formed by curing the acrylic composition according to claim 1.

3. The acrylic tape according to claim 2, wherein curing comprises ultraviolet (UV) light polymerization.

4. An acrylic rubber roll comprising a roller and the acrylic tape according to claim 2 wrapped on the roller.

5. The method for producing the acrylic rubber roll according to claim 1, further comprising: before irradiating the acrylic composition with UV light, adding one or more of: antiseptic, antibacterial agent, flavoring agent, plasticizer, and fumed silica into the acrylic composition.

6. The method for producing the acrylic rubber roll according to claim 1, wherein the curing agent comprises a bifunctional acrylic ester.

7. The method for producing the acrylic rubber roll according to claim 1, wherein the photoinitiator comprises 2,2-dimethoxy-phenyl ketone

Description

DETAILED DESCRIPTION

[0012] In one embodiment, a curable acrylic composition is provided, comprising 50-77 wt % 2-ethylhexyl acrylate, 2-10 wt % acrylic acid, 20-40 wt % 2-hydroxyethyl acrylate, 0.1-0.5 wt % curing agent and 0.1-0.2 wt % photoinitiator.

[0013] The acrylic composition also comprises other additive such as mildew preventive, antibacterial agent and flavoring agent, such as fumed silica and A-200.

[0014] The curing agent has no special restrictions. The embodiment of the curing agent can include a bifunctional acrylic ester monomer such as HDDA and TPGDA.

[0015] The photoinitiator has no special restrictions. For example, the embodiment of the photoinitiator can be Irgacure 651.

[0016] The curable acrylic composition in the embodiment of the disclosure is formed by mixing 2-ethylhexyl acrylate, acrylic acid, 2-hydroxyethyl acrylate, curing agent and photoinitiator according to ratios.

[0017] In addition, the acrylic tape can be formed by curing the curable acrylic composition. UV-light can be used for curing.

[0018] In one embodiment, the acrylic rubber roll can be formed by wrapping the acrylic tape on the roll. The acrylic rubber roll can be used to clean surfaces of household textile products.

[0019] In one embodiment, acrylic composition can be applied on the roll, and then be crosslinked and cured to form the acrylic rubber roll used to clean surfaces of household textile products.

EXAMPLES

[0020] The embodiment of the present disclosure is described by, but not limited to the following embodiments.

[0021] Typical raw materials used in embodiments and comparison cases are listed as follows:

TABLE-US-00001 Irgacure 2-EHA AA HEA 651 HDDA Supplier HYAYL BASF BASF Ciba Cytec Type 2-ethy- Acrylic 2-Hydro- Photo- Curing lhexyl acid cyethyl initiator agent acrylate acrylate Case No. 103-11-7 79-10-7 818-61-1 24650-42-8 13048-33-4

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Embodiment 1

[0022] Homogeneously mix 2-EHA, AA, HEA, the curing agent HDDA and the Photoinitiator Irgacure 651 according to the ratios shown in Table 1 to obtain the curable acrylic composition. Specifically, pour liquid raw materials including 2-EHA, AA, HEA and the curing agent HDDA into a glass container at room temperature, stir said materials at a constant speed with a stirrer, then add photoinitiator Irgacure 651 powder and continue to stir said materials at a constant speed until the photoinitiator Irgacure 651 is completely dissolved.

[0023] Cure and crosslink the acrylic composition with a UV lamp and ensure the crosslinking reaction of monomers in the formula is thorough so as to form the acrylic tape.

[0024] Cut the acrylic tape model to the size of the plastic rubber roll shaft, and stick said acrylic tape evenly without air bubbles to the rubber roll that can rotate freely so as to form the acrylic rubber roll that can be used to remove dust and lint.

Comparison Cases 1-2

[0025] A curable acrylic composition can be prepared with the same method in Embodiment 1. The difference lies in changing the ratios of 2-EHA, AA and HEA as shown in Table 1. Prepare the acrylic tape and the acrylic rubber roll with the curable acrylic composition prepared with same method in Embodiment 1.

Embodiments 2-4

[0026] Prepare the curable acrylic composition with the same method in Embodiment 1. The difference lies in changing the ratios of 2-EHA, AA and HEA as shown in Table 1. Prepare the acrylic tape and the acrylic rubber roll with the curable acrylic composition prepared with the same method in Embodiment 1.

TABLE-US-00002 TABLE 1 Irgacure 2-EHA AA HEA HDDA 651 Sample (wt %) (wt %) (wt %) (wt %) (wt %) Embodiment - 1 56.5 3 40 0.3 0.2 Comparison 76.5 4 19 0.3 0.2 Case - 1 Embodiment - 2 75.5 4 20 0.3 0.2 Embodiment - 3 53.5 6 40 0.3 0.2 Comparison 72.5 8 19 0.3 0.2 Case - 2 Embodiment - 4 71.5 8 20 0.3 0.2

[0027] The acrylic tape and the acrylic rubber roll prepared in the embodiments and comparison cases are tested. The testing methods are as follows:

Washing Test Method:

[0028] Select a suitable amount of lint and lay said lint on a flat surface. Gently contact the tested fresh rubber-surface with the lint and then quickly lift the sample up. Observe whether or not the lint is easily picked up by the rubber sample.

[0029] Place the rubber sample, now stuck with lint, under a faucet and wash the rubber surface with slow running water, gently wiping the lint off the adhesive surface with fingers. Keep the washing time controlled to 15 seconds or less. Turn off the tap and observe whether any lint remains on the adhesive surface.

[0030] The results obtained from this test are shown in Table 2.

TABLE-US-00003 TABLE 2 Results of Washing Test Sample Appearance Result Embodiment -1 Good transmittance, mildly hard Easy to wash, no rubber without air bubbles remaining lint Comparison Good transmittance, soft rubber Hard to wash, Case -1 without air bubbles remaining lint. Embodiment - 2 Good transmittance, soft rubber Easy to wash, no without air bubbles remaining lint Embodiment - 3 Good transmittance, mildly hard Easy to wash, no rubber without air bubbles remaining lint Comparison Good transmittance, soft rubber Hard to wash, Case - 2 without air bubbles remaining lint. Embodiment - 4 Good transmittance, soft rubber Easy to wash, no without air bubbles remaining lint

Initial Adhesion Test Method:

[0031] Refer to the standards of G1 ASTM D6195 for the initial adhesion test method. The samples include the fresh rubber samples and soaked rubber samples. The method for preparing soaked samples is to soak the whole rubber sample in clean water and remove after 30 minutes of soaking. Place the rubber sample in a room at 22° C. and humidity of 50% until the rubber sample is completely dry for testing.

[0032] The results obtained from this test are shown in Table 3.

TABLE-US-00004 TABLE 3 Results of Initial Adhesion Test: Sample Fresh sample (N/inch) Soaked sample (N/inch) Embodiment -1 19.31 11.32 Comparison 15 7.36 Case -1 Embodiment -2 18.97 9.44 Embodiment -3 16.26 9.2 Comparison 14.32 5.6 Case-2 Embodiment -4 18.92 7.4

[0033] In the practical application of washable rubber rolls, initial adhesion is one of the most direct indexes indicating roll performance. Since concepts such as washing and reusability are involved in use, the initial adhesion retention of soaked rubber samples is important too. With initial adhesion tests on fresh samples and soaked samples, the performance of washable rubber rolls in practical applications can be simulated.

[0034] In practical applications, too great or small initial adhesion will affect practical using effects. According to test results, Embodiment-1, Embodiment-2 and Embodiment-3 have excellent initial adhesion retention, washing test results and initial adhesion test results for fresh samples and soaked samples.

Washability Test:

[0035] The test sample measures 1 inch by 8 inches and is covered with standard dust. The sample is washed by hand with running water for about 15 seconds, then the water droplets are gently shaken off and the sample is allowed to stand for one minute in a 22° C. and 50% relative humidity environment. These steps are then repeated (dusting, cleaning, and rinsing) 150 times before being allowed to dry for 5 minutes. Then testing is performed on Embodiment-1, Comparison Case-1 and competing products (competing products are mostly produced by casting elastic materials such as synthetic rubber, polyurethane, and silica gel on a plastic roll shaft with a mould, and have names such as Sticky Lint Roller and Lint Cleaner, etc.) in accordance with G1 ASTM D6195.

[0036] After 150 cycles, the initial adhesion of Embodiment-1 remained nearly the same while that the competing products fell by about 50%. In addition, the initial adhesion of the rubber tape of Embodiment-1 is about 4 times greater than that of the competing product. The rubber tape of the embodiment of the present disclosure has long-lasting cleaning abilities for adhered dirt such as dust and lint. Compared with Embodiment-1, the washability data of the Comparison Case-1 falls off slightly.

TABLE-US-00005 TABLE 4 Comparison Test on Washability Comparison of initial adhesion, Unit: g/in, Competing loop tack test method Embodiment 1 Product Initial value (before rinsing) 272.4 67.34 After being used and rinsed 150 times 263.26 35.71

Test of the Recovery Time of Adhesion

[0037] The roll diameter of the rubber roller is 56 mm and the roll is 98 mm long. The natural dry time after washing is the adhesion recovery time of the rubber roll.

TABLE-US-00006 TABLE 5 Adhesion Recovery Time Natural dry time after washing Natural dry time of rubber roll (min) 1# 19.0 2# 17.0 3# 22.0 4# 13.0 5# 18.0 Average dry time (min.) 17.8
In Table 5, 1#-5# are the 5 times sampling test results of Embodiment 1.

[0038] During practical application, consumers can reuse the rubber tape about 1 to 3 minutes later after the rubber tape surface is half dry. The adhesion is sufficient to remove dirt such as lint. The rubber tape can be used before the rubber surface is completely dry. Wiping away water drops with a piece of soft cloth or paper that does not leave scraps to speed up the adhesion recovery of rubber surface.

Test Results on Washing Difficulty

[0039]

TABLE-US-00007 TABLE 6 With cold With warm With soapy running water water water Embodiment 1 Easy to wash Easy to wash Easy to wash Comparison Case 1 Difficult to wash Easy to wash Easy to wash Competing Product Difficult to wash Difficult to wash Easy to wash