Rooting inhibitors

Details Rooting inhibitors Rooting inhibitors

1997-07-01

1998-07-14

Green, Anthony

Compositions: coating or plastic

Coating or plastic compositions

Contains fireproofing or biocidal agent

106808, 106823, 10628406, 527413, 504322, 504338, A01N 3718

Patent

active

057797765

DESCRIPTION:

BRIEF SUMMARY
The present invention relates to the use of 2-methyl-4-chlorophenoxypropionamides for protecting buildings, building materials and insulation compounds against the penetration of roots into and through them, to rooting-inhibiting bitumen mixtures, sealants and insulations and to antifouling finishing.
The penetration of roots through building materials results in undesirable damage to the materials. Plant roots are capable of destroying, in particular, plastic materials such as sealants, roofing materials, but also asphalt. The penetration of roots into seals of sewers and waste-water pipes, into the coverings of flat roofs, into bitumen insulations of pipelines, bridge constructions and hydraulic structures, and the penetration of roots into and through light bitumen roads are generally known problems. Leaks, corrosion, and damage to buildings, roads and pipelines may result.
The addition of root-inhibitory active compounds to building materials is known and described, for example, in F. Hegemann, Abiogene Bitumenadditive (1973).
It is furthermore known to use herbicides such as, for example, 2,4-dichlorophenoxy acetic acid, 2,4,5-trichlorophenoxyacetic acid and .alpha.-naphthylacetic acid or their salts, amides or esters, for example isooctyl ester or 1-hydroxy-2-butoxyethane esters, furthermore N-isopropylphenylcarbamate and p-chlorophenyldimethylurea as root penetration inhibitors (DE 1 108 833).
There are also described mixtures of condensates of monochloroacetic acid and a variety of o-chlorophenols or o-chlorocresols, which are said to have these properties (see DE 1 109 294).
Finally, it has been disclosed that amides of di- and polyamines with MCPP acid (2-methyl-4-chlorophenoxypropionic acid) inhibit the growth of roots (DE 1 196 115).
Surprisingly, it has now been found that amides of MCPP acid which are derived from the monoamines of the general formula (I) ##STR1## in which R.sup.1 and R.sup.2 are identical or different and represent hydrogen or straight-chain C.sub.1 -C.sub.30 alkyl, its branched or cyclic isomers or phenyl are highly potent root penetration inhibitors. s-butyl, t-butyl, n-pentyl, i-pentyl, neo-pentyl, t-pentyl, cyclopentyl, cyclohexyl, cyclooctyl, n-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, cyclodecyl, n-tetradecyl, n-tridecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl, n-C.sub.22, n-C.sub.24 or their branched structural isomers, or represents phenyl or benzyl, each of which is substituted by C.sub.1-10, Cl, Br, OH or OMe; and i-propyl, n-butyl, i-butyl, s-butyl, t-butyl, n-pentyl, i-pentyl, neo-pentyl, t-pentyl, cyclopentyl, cyclohexyl, cyclooctyl, n-hexyl, n-heptyl, n-octyl, 2-ethylhexyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, cyclodecyl, n-tetradecyl, n-tridecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, n-nonadecyl, n-eicosyl, n-C.sub.22, n-C.sub.24 or their branched structural isomers, or represents phenyl or benzyl, each of which is substituted by C.sub.1-14, Cl, Br, OH or OMe; or and thus have a natural isomer and chain length distribution, such as, for example, fatty amines, coconut fatty amine, stearyl amine, oleyl amine, dehydroabietyl amine, tallow fatty amine, octyl amine, dodecyl amine, tetradeyl amine, hexadeyl amine, octadecyl amine, distearyl amine, dicocoamine, di-tallow amine, and mixtures of these.
In the case of the branched structural isomers, other alkyl radicals which are preferred are those which can be prepared by means of the Grubert reaction, such as, for example, 2-hexyldecanol (Isofol 16), 2-butyloctanol (Isofol 12), 2-decyltetradecanol (Isofol 24), 2-octyldodecanol (Isofo 20) and other Isofols (by Condea, Brunsbuttel) from 10 to 30, or mixtures of these which are Aminir in a subsequent reaction step.
Especially preferred amongst these amides are those of the amines of the formula (I) in which branched structural isomers and renewable raw materials, for example coconut fatty amine.
All MCPP acid amide isomers and racemic and optically active MCPP acid amides are

REFERENCES:
patent: 3231398 (1966-01-01), Pauli
patent: 3900308 (1975-08-01), Poignant et al.
Chemical Abstract No. 66:46215 which is an abstract of Netherlands Patent Specification No. 6602710 (Sep. 1966).
Chemical Abstract No. 73:108607 which is an abstract of Netherlands Patent Specification No. 6816837 (May 1970).
WPIDS Abstract No. 76:28406 which is an abstract of German Patent Specification No. 2,444,821 (Apr. 1976).
WPIDS Abstract No. 76:84008X which is an abstract of Japanese Patent Specification No. 51-106728 (Sep. 1976).
WPIDS Abstract No. 95:346729 which is an abstract of Great Britain Patent Specification No. 2,288,395 (Oct. 1995).

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