FR2667323A1 - NEW COMPOSITIONS FOR LAYER COVERING LAYERS. - Google Patents

Abstract

The present invention relates to an anti-static composition intended to constitute the support layer of a floor covering, comprising a material chosen from bitumens and petroleum resins, in which is incorporated a compound of formula I (CF DRAWING IN BOPI) where the symbols have various meanings.

Description

The subject of the present invention is the use of 2-alkyl-

  quaternized imidazolines as antistatic agents in the support layers of floor coverings, especially for carpet and

PVC flooring.

  Walking on carpets or other floor coverings causes static loads to accumulate and discharge if grounded. This can cause serious bodily injury.

  and can even damage electrical installations.

  The area of use of carpets or other

  soil can often be made conductive by the incorporation of anti-static fibers capable of

dissipate the charges.

  A problem that remains is that of the conductivity of the materials constituting the support layer of the floor coverings, that is to say of the lower layer of the coating in contact with the ground It is usually plastisol PVC, bitumen, propylene or petroleum resins (such as aromatic hydrocarbon resins) which are applied in the form of a liquid or hot melt on the back of the surface of use, for example on the back of the primary layer of a carpet having the surface of use, that is to say the hairs The methods of preparation of carpets using these materials are well known and described for example in US Patents 4,702,950, 4,582,554 and 4,737 221 whose contents are incorporated in this

request for reference.

  Such materials provide coatings

  Soils with good dimensional stability and good flat hold

  floor coverings to be made continuously.

  However, many of them, especially those based on bitumen or containing them, are by nature insulators and cancel any gain in conductivity obtained for example by incorporating anti-static fibers.

in the surface of use.

  The Applicant has now found that this disadvantage can be reduced, or even sometimes completely eliminated, by incorporating certain chemical compounds into the materials constituting the support layer.

floor coverings.

  The invention therefore relates to an anti-static composition intended to constitute the support layer of a floor covering, characterized in that it comprises a material chosen from bitumens and petroleum resins applicable in the form of a hot melt, and mixtures thereof, material in which is incorporated one or more compounds of formula I

N-CH 2

// RlC R 4 e

\ H (I)

N -CH 2

  Wherein R 1 is C 7 -C 21 alkyl or alkenyl

C 7 -C 2 1,

  R 2 is OH, -O-COR, -NH 2 or -NHCOR o R has the meaning of R 1, independently of R 1, R 3 is unsubstituted or monosubstituted by C 1 -C 4 alkyl, -CH 2-C 6 H 5 or -CH 2 -CH-CH 2, R 4 means an anion, preferably Cl, Br, or the methyl sulfate group (Me SO 4) or ethyl sulfate (And SO 4 ) and

n means 1 or 2.

  Preferably, N is 2 and R 4 is chosen

  among Cl, Br and the methyl sulfate group (Me SO 4).

  The compound of formula I is incorporated in the material of the carrier layer in an amount of 1 to% by weight based on the weight of the material of the

support layer.

  The preferred compounds of formula I are those in which: R 2 is hydroxy, n is 2, R 1 is C 1 -C 21 alkyl or C 15 -C 21 alkenyl, preferably alkyl. C 1 L-C 17

  or C 15 -C 21 alkenyl and R 3 is methyl or 2-hydroxypropyl.

  The material of the support layer is selected from bitumens and petroleum resins applicable in the form of a hot melt, suitable for the manufacture of floor coverings When using an applicable petroleum resin in the form of a melt It is preferably an aromatic hydrocarbon resin. The material of the support layer is preferably a bitumen. Preferred bitumens are those having a softening point (measured according to the ball and ring method, ASTM D 36) between 95 and 1150 and an index of

  penetration (measured according to the ASTM D 5 method) of 15 mm.

  The material of the support layer may also

  contain, for example, a filler, the most common being limestone, which is added in an amount not exceeding 50% by weight

  material ratio of the support layer.

  One or more compounds of formula I may be incorporated into the material of the support layer to provide a composition of the invention which is then applied to the floor covering, in accordance with the usual methods. Floor coverings particularly suitable for the compositions of the invention. The invention is carpets, particularly non-woven carpets such as slabs, and coatings

  PVC Floor coverings that include a composition

  of the invention have not only the properties

  desired habituals such as dimensional stability

  the good flat hold and the ease of pre-

  However, the invention also relates to a floor covering which comprises at least one layer. The invention also relates to a substantially reduced (and often completely non-existent) tendency to generate static charges.

  obtained from a composition according to the invention.

  The invention also relates to a prepa-

  a floor covering, wherein the backside of the primary layer is covered with a floor covering with at least one layer of a composition according to the invention. The following examples illustrate the invention without in any way limiting its scope. In these examples, the bitumen used has the following characteristics: Softening point (ASTM D 36) = 115 + / 50 c Penetration index (ASTM D 5) = 15 to 25 mm The method used in the examples for the

  determination of the resistance is as follows.

  The device used is a portable device to determine the resistance (Megger 'Megohmeter' MM 29) It is connected to two electrodes The electrode which is placed in a position adjacent to the support layer is a solid brass plate of 20 x 20 cm and 1 cm thick The electrode that rests on the surface of use (when there is one) is a solid steel cylinder of 2.2 kg and 31.7 cm 2 The area of the sample to be tested corresponds at least to that of

the brass electrode.

  Before the test, the samples are now

  naked overnight at 200 + 2 and 5% relative humidity.

EXAMPLE 1

  30 g of bitumen and 30 g of limestone are mixed, heated to 175 ° C. and stirred until a homogeneous mixture is obtained. 3% by weight is added.

  (of the total mixture) of 1-methyl-1-methyl-1-methyl-

  hydroxyethyl-2-alkylimidazoline (the alkyl group being derived from the commercial coco fatty acid) and the mixture is stirred for 10 minutes The resulting mixture is poured onto release paper, the mixture is pressurized to a thickness of 5 mm and it is

let cool.

  The results of the resistance measurement

are shown in Table 1.

EXAMPLE 2

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-e-hydroxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from the fatty acid

coconut and palm).

EXAMPLE 3

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-e-hydroxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from the fatty acid

palm oil).

EXAMPLE 4

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-O-hydroxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from oleic acid).

EXAMPLE 5

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-O-hydroxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from stearic acid).

EXAMPLE 6

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-f-aminoethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from stearic acid).

EXAMPLE 7

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-O-stearyloxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from stearic acid).

EXAMPLE 8

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1-methyl-1-O-stearylamido-ethyl-2 methyl sulfate

  alkyl-imidazoline (where the alkyl group is derived from

stearic acid).

EXAMPLE 9

  Example 1 is repeated, but in place of the imidazoline of Example 1, 3% by weight of

  1- (2-Hydroxypropyl) -1-O-hydroxyethyl-2-chloride

  alkyl-imidazoline (where the alkyl group is derived from

coconut fatty acid).

TABLE 1

  Example Resistance in Ohm without anti-static> 10 x 1012 1 3 x 108 2 4 x 108 3 1.5 x 108 4 9 x 109 1.6 x 109 6 2.5 x 1010 7 5 x 1011 8 2.5 x 1010 9 7x108

EXAMPLE 10

  At 175 C, 50 g of bitumen are melted,

  add 2% by weight of methyl-1-methyl-1-sulfate

  e-hydroxyethyl-2-alkylimidazoline (where the alkyl group is derived from the coconut and palm fatty acid) and stirred for 10 minutes The resulting mixture is poured onto release paper, the mixture is pressed until at a thickness of 3 mm and allowed to cool The results of the resistance measurement are indicated

in Table 2.

EXAMPLE 11

  Example 10 is repeated, but instead of the imidazoline of Example 10, 4% by weight of

  1-methyl-1-e-hydroxyethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from the fatty acid

coconut and palm).

EXAMPLE 12

  Example 10 is repeated, but in place of the imidazoline of Example 10, 6% by weight of

  1-methyl-1-5-hydroxymethyl-2-alkyl-methyl sulfate

  imidazoline (where the alkyl group is derived from the fatty acid

coconut and palm).

EXAMPLE 13

  Example 10 is repeated except that the bitumen is applied to the underside of a nylon mat containing conductive carbon fiber, and not

on non-stick paper.

EXAMPLE 14

  Example 11 is repeated except that the bitumen is applied to the underside of a nylon mat containing conductive carbon fiber, and not

on non-stick paper.

EXAMPLE 15

  Example 12 is repeated except that the bitumen is applied to the underside of a nylon mat containing conductive carbon fiber, and not

on non-stick paper.

TABLE 2

  Example Resistance in Ohm Asphalt alone 7 x 1012 Carpet 2 x 106 Asphalt / Carpet 6 x 1012 4.4 x 109 11 4 x 108 12 4.8 x 107 13 10 x 109 14 9 x 108 4 x 106

Claims (6)

  An anti-static composition intended to constitute the support layer of a floor covering, characterized in that it comprises a material chosen from bitumens and petroleum resins applicable in the form of a hot melt, and mixtures thereof, material in which is incorporated one or more compounds of formula I N CH 2 // R 1-C R 4 e (e) N CH 2   Wherein R 1 is C 7 -C 21 alkyl or alkenyl C 7 -C 21,   R 2 is OH, -O-COR, -NH 2 or -NHCOR wherein R 1 has the meaning of R 1, independently of R 1, R 3 is unsubstituted or monosubstituted by C 1 -C 4 alkyl; CH 2 -C 6 H 5 or -CH 2 -CH-CH 2, OR 4 means an anion, and n means 1 or 2.   2 A composition according to claim 1, characterized in that R 4 is Cl, Br or a methyl sulphate group (Me SO 4) or ethyl sulphate (And 504) and N means 2.   A composition according to claim 1 or 2, characterized in that R 2 is hydroxy, n is 2, R 1 is C 1 -C 21 alkyl or C 15 -C 21 alkenyl, R 3 is a group methyl or 2-hydroxypropyl, and   R 4 is a methyl sulfate group.   4 A composition according to any one   Claims 1 to 3, characterized in that the   composition contains 1 to 10% by weight of compound of formula I relative to the weight of the material intended to form the support layer of a coating of soil.   A floor covering, characterized in that it comprises at least one layer obtained from a composition according to any one of Claims 1 to 4.   A process for the preparation of a floor covering, characterized in that the backside of the primary layer is covered with a floor covering with at least one layer of a composition according to any one of Claims 1 to 4.   7 Use of a compound as specified in   any of claims 1 to 3 as an anti-   static of the support layer of a floor covering.