COATING AGENT COMPOSITION CONTAINING PVC AND PLASTICIZING COMPONENTS

Abstract

A coating composition comprising a. polyvinyl chloride b. one or more compounds of general formula (I)

##STR00001## in which R.sup.1a and R.sup.1b are independently of one another C.sub.7- to C.sub.12-alkyl c. one or more compounds having plasticizing properties selected from adipates comprising C.sub.1- to C.sub.6-radicals, glutarates comprising C.sub.1- to C.sub.6-radicals, sebacates comprising C.sub.2- to C.sub.6-radicals, dibenzoates, monobenzoates comprising a C.sub.5- to C.sub.10-alkyl radical or a benzyl radical, compounds of general formula (II), compounds of general formula (III), phenyl esters of pentadecylsulfonic acid, cresyl esters of pentadecylsulfonic acid, terephthalates comprising C.sub.1- to C.sub.6-radicals, levulinic esters comprising C.sub.1- to C.sub.6-radicals, isosorbitol valerate, trimellitates comprising C.sub.1- to C.sub.6-radicals and 2,2,4-trimethyl-1-3-pentanediol-diisobutyrate, d. one or more compounds of general formula (IV).

##STR00002##

Claims

1.-13. (canceled)

14. A coating composition comprising a. polyvinyl chloride, b. one or more compounds of the formula (I), ##STR00010## in which R.sup.1a and R.sup.1b are independently of one another C.sub.7- to C.sub.12-alkyl c. one or more compounds having plasticizing properties selected from adipates comprising C.sub.1- to C.sub.6-radicals, glutarates comprising C.sub.1- to C.sub.6-radicals, sebacates comprising C.sub.2- to C.sub.6-radicals, dibenzoates, monobenzoates comprising a C.sub.5- to C.sub.10-alkyl radical or benzyl radical, compounds of the formula (II) ##STR00011## in which R.sup.2a, R.sup.2b and R.sup.2c independently of one another and independently of R.sup.2d are C.sub.2- to C.sub.6-alkyl and R.sup.2d independently of R.sup.2a, R.sup.2b and R.sup.2c is C.sub.1- to C.sub.5-alkyl, compounds of the formula (III) ##STR00012## in which R.sup.3a, R.sup.3b and R.sup.3c are independently of one another C.sub.2- to C.sub.6-alkyl, phenyl esters of pentadecylsulfonic acid, cresyl esters of pentadecylsulfonic acid, terephthalates comprising C.sub.1- to C.sub.6-radicals, levulinic esters comprising C.sub.1- to C.sub.6-radicals, isosorbitol valerate, trimellitates comprising C.sub.1- to C.sub.6-radicals and 2,2,4-trimethyl-1,3-pentanediol diisobutyrate, and d. one or more compounds of the formula (IV), ##STR00013##

15. The coating composition according to claim 14, wherein the proportion of one or more compounds of the formula (1) is 5 to 150 phr.

16. The coating composition according to claim 14, wherein the proportion of one or more compounds having plasticizing properties is 5 to 150 phr.

17. The coating composition according to claim 14, wherein the proportion of one or more compounds of the formula (IV) is 0.1 to 10 phr.

18. The coating composition according to claim 14, wherein a compound of the formula (1) is di(isononyl) 1,2-cyclohexanedicarboxylate.

19. The coating composition according to claim 14, wherein one or more compounds having plasticizing properties are one or more compounds of the formula (II) ##STR00014## wherein are independently of one another and independently of R.sup.2d C.sub.2- to C.sub.6 alkyl and R.sup.2d independently of R.sup.2a, R.sup.2b and R.sup.2c is C.sub.1- to C.sub.5-alkyl.

20. The coating composition according to claim 14, wherein one or more compounds having plasticizing properties are one or more dibenzoates and the dibenzoates are selected from the group consisting of diethylene glycol dibenzoate, triethylene glycol dibenzoate, polyethylene glycol dibenzoate and dipropylene glycol dibenzoate.

21. The coating composition according to claim 14, wherein the coating composition comprises one or more isocyanurates distinct from those of the formula (IV),

22. The coating composition according to claim 14, Wherein the coating composition comprises one or more polymers distinct from polyvinyl chloride.

23. A process for producing a coating composition according to claim 14, comprising the following steps: a. suspending polyvinyl chloride in one or more compounds of the formula (I), b. adding one or more compounds of the formula (IV) to the suspension obtained in step a., wherein one or more of the compounds recited under claim 14c) having plasticizing properties may be added in step a., or subsequent to step a, and prior to step b., in step b., or subsequent to step b., or at any time.

24. A process for coating fabric fibers or fabric, wherein one or more sides of the fabric fibers or of the fabric are contacted with the coating composition from claim 14.

25. The process according to claim 24, wherein the fabric is synthetic fabric.

26. An article comprising a fabric, wherein the fabric has been at least partially coated on one or more sides with the coating composition from claim 14.

Description

EXAMPLES

[0133] The invention is more particularly elucidated with reference to the figures described hereinbelow and the examples . The figures and examples are not to be understood as being limiting to the invention. The following input materials are used in the examples:

TABLE-US-00001 Commercially available for example Input materials as from Homopolymeric emulsion PVC Vinnolit Vinnolit GmbH & P70 PS Co. KG, Germany Homopolymeric emulsion PVC Vestolit Vestolit GmbH, E7031 Germany Di(isononyl) Hexamoll BASF SE, Germany 1,2-cyclohexanedicarboxylate DINCH Acetyl tributyl citrate Citrofol BII Jungbunzlauer Ladenburg GMBH, Germany Mixture of Benzoflex Eastman Chemical 65% diethylene glycol dibenzoate, 2088 bv, the 20% dipropylene glycol dibenzoate Netherlands and 15% triethylene glycol benzoate, BaZn stabilizer Baerostab Baerlocher Italia UBZ 729 RF S.p.a, Epoxidized linseed oil Edenol B316 Emery Oleochemicals GmbH Chalk Omya Industrie Omya AG, Spezial Switzerland Titanium dioxide Kronos 2220 Kronos Titanium GmbH, Germany Isocyanurate, isocyanate- Bonding Agent Lanxess functionalized TP LXS 51099 Deutschland GmbH

[0134] In all examples the employed homopolymeric emulsion PVC was Vinnolit P70 PS and/or Vestolit E7031, di(isononyl) 1,2-cyclohexanedicarboxylate was Hexamoll DINCH, acetyl tributyl citrate was Citrofol 611, mixture of 65% diethylene glycol dibenzoate, 20% dipropylene glycol dibenzoate and 15% triethylene glycol benzoate was Benzoflex 2088, BaZn stabilizer was Baerostab UBZ 729 RF, epoxidized linseed oil was Edenol B316, chalk was Omya Industrie Spezial, isocyanate-functionalized isocyanurate was Bonding Agent TP LXS 51099 and titanium dioxide was Kronos 2220.

[0135] HexamollDINCH:

TABLE-US-00002 Measurement Property Typical value Unit method Viscosity at 20 C. 40-66 mPA*s ASTM D 7042-14 Density at 20 C. 0.944-0.954 g/ml DIN 51757 (01/11) Acid number not more than 0.07 mg KOH/g DIN EN ISO 2114 06/02) Refractive index n.sup.D .sub.20 1.460-1.466 at DIN 51423/2 20 C. (02/10)

[0136] Bonding Agent TP LXS 51099 according to datasheet (Technical Information 2011 Aug. 9, page 1 to 3):

TABLE-US-00003 Measurement Property Typical value Unit method Viscosity at 23 C. about 6000 to 15 mPA*s DIN EN ISO 000 3219/A.3 Rotation NCO content 4-6 % DIN EN ISO 11909 (method based thereupon) Monomer content <1 % DIN 55 956 (TDI) Flash point 154 C. DIN EN ISO 2719

[0137] In the context of the examples Bonding Agent TP LXS 51099 is also referred to as an adhesion promoter.

TABLE-US-00004 TABLE 1 Composition of pastes; amounts in phr Components #1* #2 #3 #4* #5 #6 Vinnolit P70 PS 100 100 100 Vestolit E7031 100 100 100 Hexamoll DINCH 70 52 52 70 52 52 Citrofol Bll 18 18 Benzoflex 2088 18 18 Baerostab UBZ 729 RF 3 3 3 3 3 3 Edenol B316 3 3 3 3 3 3 Omya Industrie Spezial 20 20 20 20 20 20 Kronos 2220 10 10 10 10 10 10 Bonding Agent TP LXS 51099 8 8 8 8 8 8 *Comparative experiments, not inventive

[0138] The studies were in each case performed in the following five steps: [0139] 1. Production of base pastes [0140] 2. Modification of pastes with adhesion promoter [0141] 3. Rheological measurements of paste viscosity [0142] 4. Production of textile coatings [0143] 5. Measurement of peel force

1. Production of Base Pastes

[0144] The batch size of the base coat pastes was 300 g. Hexamoll DINCH and Citrofol BII or Hexamoll DINCH and Benzoflex 2088, stabilizer (Baerostab UBZ 729 RF) and co-stabilizer (Edenol B316) were stirred into the initially charged blend of PVC, chalk and TiO2, and uniformly dispersed using a dissolver disk over about 5 min. The paste was subsequently ground in a laboratory roller mill (gap width 0.08/0.04 mm) and deaerated for 90-120 min. The thus-obtained base paste was allowed to mature overnight.

2. Modification of Pastes With Adhesion Promoter

[0145] A separated and weighed portion of the paste was admixed with the calculated amount of adhesion promoter (3.88 g 100 g). The thus-modified paste was deaerated for a further 30 min. Measurement of viscosity was followed by production of the coating samples which in turn was followed by another viscosity measurement.

3. Rheological Measurements of Paste Viscosity

[0146] The viscosity of all pastes was determined according to a fixed timing. Initially, i.e. immediately before addition of the adhesion promoter, a small amount of the base paste was in each case subjected to viscosity measurement. The pastes modified with adhesion promoter were measured 40 min and 200 min after adhesion promoter addition. To this end an MCR 300 modular compact rheometer (Anton Paar GmbH) fitted with a PP25 measuring system was used (plate-plate, radius 12.5 mm, gap width 0.2 mm). After temperature control of the sample (25 C.) the flow curve in the shear rate range of 1-1000 s.sup.1 was recorded. Viscosity values at 40 s.sup.1, 100 s.sup.1 and 490 s.sup.-were obtained therefrom.

4. Production of Textile Coatings

[0147] Textile coating was carried out using a heat-set PES fabric (1100 dtex, 717 linen weave, 158 g/m.sup.2). Coatings with the base coat pastes were carried out about 60 min after addition of the adhesion promoter. The samples were produced in an LTF Labcoater consisting of a laboratory spread coater having a tenter and a dryer (Werner Mathis AG).

[0148] To achieve double-sided coating of the PES fabric used here first coating of one side by the transfer method and subsequent direct coating of the other side has proven advantageous. A sheet of release paper (Stripkote BOR Supermatte, Arjo Wiggins Fine Papers Ltd.) was placed in the tenter and coated with base coat paste (knife coater gap width 0.3 mm). A cut-to-size fabric piece was then carefully laminated with the paste film. Fixing was carried out in the dryer at 160 C. (2 min). Base coat paste was then applied to the cooled top side (gap width 0.3 mm). Gelation of the composite was carried out at 190 C. (2 min). After cooling the sample was separated from the release paper. The basis weight of the samples is about 725 g/m.sup.2.

5. Measurement of Peel Force

[0149] Testing of the adhesion/peel force was carried out according to DIN EN ISO 2411 (August 2000) (rubber- or plastics-coated textilesdetermination of adhesive bond strength of coatings). To prepare the test specimens two respective samples die-cut from the samples were bonded together by the directly coated side with a 2K adhesive and stored under pressure. The actual test specimens having the specified dimensions were die-cut on the day of testing. The test specimens were prepared on the sixth day after sample preparation and tested on the seventh day. In a departure from the standard the peel force was measured on only three samples (longitudinally).

Results

[0150]

TABLE-US-00005 TABLE 2 Viscosity values for PVC pastes (at 40 s-1, 100 s-1 and 490 s-1) and peel force of the coatings on PES fabric. Base Paste modified with Shear paste Bonding Agent TP LXS 51099 rate after 40 min after 200 min Peel force Mixture [s.sup.1] [Pa s] [Pa s] [Pa s] [N] 1* 40 1.6 13.6 17.5 27 100 2.1 7.6 9.8 490 4.1 4.2 4.5 2 40 1.9 2.7 4.2 35.9 100 2.4 3.1 5.4 490 4.8 4.2 5.6 3 40 2.9 3.3 3.8 30 100 4.4 5.1 6.2 490 8.7 8.6 9.4 4* 40 7.8 24.3 37.4 96 100 5.6 13.7 20.6 490 3.3 6.2 7.2 5 40 11 14.5 27.1 129 100 7.6 9.4 16.1 490 4.5 5 6.7 6 40 11.1 9.1 10 95 100 84 7 7.6 490 5.7 5.1 5.3

[0151] Compared to the comparative experiments the coating compositions according to the invention each have very low paste viscosities after 200 minutes after production. This means the inventive pastes have a markedly elevated pot life compared to the comparative experiments.

[0152] The coated fabrics produced from the inventive coating composition each have a markedly higher peel force than the coated fabrics based on the coating compositions from comparative experiments.

[0153] The inventive coating compositions are thus in each case advantageous in respect of pot life and the peel force of the coated fabrics produced therefrom compared to the noninventive coating compositions.