17  US 6,872,832 B2  18  b) catalytic polymerisation using a catalyst that normally  contains one or more than one metal of groups IVb, Vb, VIb  or VIII of the Periodic Table. These metals usually have one  or more than one ligand, typically oxides, halides,  alcoholates, esters, ethers, amines, alkyls, alkenyls and/or  aryls that may be either  it- or a-coordinated. These metal  complexes may be in the free form or fixed on substrates,  typically on activated magnesium chloride, titanium(III)  chloride, alumina or silicon oxide. These catalysts may be  soluble or insoluble in the polymerisation medium. The  catalysts can be used by themselves in the polymerisation or  further activators may be used, typically metal alkyls, metal  hydrides, metal alkyl halides, metal alkyl oxides or metal  alkyloxanes, said metals being elements of groups Ia, Ila  and/or Illa of the Periodic Table. The activators may be  modified conveniently with further ester, ether, amine or  silyl ether groups. These catalyst systems are usually termed  Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ  (DuPont), metallocene or single site catalysts (SSC).  a) radical polymerisation (normally under high pressure  and at elevated temperature).  Polyolefins, i.e. the polymers of monoolefins exemplified in  the preceding paragraph, preferably polyethylene and  polypropylene, can be prepared by different, and especially  by the following, methods:  In general polymers which can be stabilized include  ger such that the molecular weight of the compound is 1500  to 2000 amu, and  R$_{28 }$ is methyl.  Most preferably in formula (30),  R$_{29 }$ is pentadecyl or  heptadecyl.  Still more preferred embodiments of the instant invention 5  are the compounds of formulas (1) to (30) where E-OH,  L-OH and  -G-0- are formed from 2-methyl-2-propanol  ( =tert-butyl alcohol).  Especially preferred compounds of formula (6) are those  where n is 1,  R$_{3 }$ is acryloyl, methacryloyl, glycidyl,  octadecanoyl, hexadecanoyl, methoxycarbonylpropionyl,  methoxycarbonylbutyryl, or methoxycarbonylpentanoyl and  where n is 2,  R$_{3 }$ is succinyl, glutaryl, adipoyl or sebacoyl.  Especially preferred compounds of formula (7) are those  where  R$_{4 }$ is hydrogen, and when p is 1, Rs is hydrogen or  butyl, or when p is 2, Rs is hexamethylene.  Especially preferred compounds of formula (9) are those  where  R$_{7 }$ is chlorine, octylamino or T$_{1}$-butylamino,  R$_{8 }$ is  T $_{1 }$-butylamino, and  R$_{9 }$ is a divalent nitrogen atom substi› tuted by butyl.  The compounds of this invention exhibit superior hydro› lytic stability, handling and storage stability as well as good  resistance to extractability when present in a stabilized  composition.  Most preferably, the polymer is a polyolefin, especially a  thermoplastic polyolefin useful in automotive coatings and  applications or a urethane based automotive coating.  Preferably, the organic material is a natural, semi› synthetic or synthetic polymer, especially a thermoplastic  polymer.  The instant invention also pertains to a polymer compo› sition containing an effective stabilizing amount of one or  more compounds selected from the compounds of formula  (1) to formula (30) as described above including compounds  of formulae (1) and (2) when b is 1 and Eis methyl, ethyl,  2-propyl or 2-methyl-2-propyl.  Especially preferred compound of formula (30) is that  where  R$_{29 }$ is heptadecyl.  Especially preferred compounds of formula (21) are those  where  R$_{20 }$ is succinyl, glutaryl, adipoyl or sebacoyl.  Especially preferred compounds of formula (20) are those  where  R$_{19 }$ is hydrogen, octadecanoyl or hexadecanoyl.  Especially preferred compounds of formula (15) are those  where q is 6, y is 1-7, R$_{1}$s is T $_{1 }$-butylamino,  R$_{16 }$ is  hydrogen, acetyl, ethylcarbamoyl, 2,4-bis( dibutylamino )-s› triazinyl, 2,4-bis( diethylamino )-s-triazinyl, s-triazinyl sub- stituted twice by T$_{1}$-butylamino or s-triazinyl substituted  once by diethylamino or dibutylamino and once by  T $_{1 }$-butylamino, R$_{17 }$ is dibutylamino, diethylamino, or T  3  where  R$_{18 }$ is acetyl or ethylcarbamoyl.  Especially preferred compounds of formula (14) are those  where m is 0, R$_{9 }$ is a divalent oxygen atom, Rm is hydrogen  or methyl, and z is an integer such that the molecular weight  of the compound is 1500-3000 amu.  Especially preferred compounds of formula (13) are those  where k is 3, y is 4--8.  R$_{9 }$ is a divalent oxygen atom,  R$_{13 }$ is  hydrogen or methyl, d and h are 0, R$_{14 }$is hydrogen, or d is  1 and h is 0, and  R$_{14 }$ is trimethylsilyl.  Especially preferred compounds of formula (12) are those  where d is 1, k is 3, x is 3 or 4,  R$_{9 }$ is divalent oxygen atom,  and  R$_{13 }$ is methyl.  Especially preferred compounds of formula (11) are those  where n is 3, p is 2, one of  R$_{11}$ ,  or  R$_{12 }$ is T  2  and the other  is hydrogen.  Especially preferred compounds of formula (10) are those  where q is 6,  R$_{7 }$ is T$_{1}$-butylamino and Rm is hydrogen.  4. Hydrocarbon resins (for example Cs-C$_{9}$ )  including  hydrogenated modifications thereof ( e.g. tackifiers) and  mixtures of polyalkylenes and starch.  3. Copolymers of monoolefins and diolefins with each other  or with other vinyl monomers, for example ethylene/  propylene copolymers, linear low density polyethylene  (LLD PE) and mixtures thereof with low density polyeth› ylene  (LDPE),  propylene/but-1-ene copolymers,  propylene/isobutylene copolymers, ethylene/but-1-ene  copolymers, ethylene/hexene copolymers, ethylene/  methylpentene copolymers, ethylene/heptene  copolymers, ethylene/octene copolymers, propylene/  butadiene copolymers, isobutylene/isoprene copolymers,  ethylene/alkyl acrylate copolymers, ethylene/alkyl meth- acrylate copolymers, ethylene/vinyl acetate copolymers  and their copolymers with carbon monoxide or ethylene/  acrylic acid copolymers and their salts (ionomers) as well  as terpolymers of ethylene with propylene and a diene  such as hexadiene, dicyclopentadiene or ethylidene- norbomene; and mixtures of such copolymers with one  another and with polymers mentioned in 1) above, for  example polypropylene/ethylene-propylene copolymers,  LOPE/ethylene-vinyl acetate copolymers  (EVA), LDPE/  ethylene-acrylic acid copolymers  (EAA), LLDPE/EVA,  LLDPE/EAA  and alternating or random polyalkylene/  carbon monoxide copolymers and mixtures thereof with  other polymers, for example polyamides.  2. Mixtures of the polymers mentioned under 1), for  example mixtures of polypropylene with polyisobutylene,  polypropylene with polyethylene (for example  PP/HDPE,  PP/LDPE)  and mixtures of different types of polyethylene  (for example  LDPE/HDPE).  1.  Polymers of monoolefins and diolefins, for example  polypropylene, polyisobutylene, polybut-1-ene, poly-4- methylpent-l-ene, polyisoprene or polybutadiene, as well  as polymers of cycloolefins, for instance of cyclopentene  or norbornene, polyethylene (which optionally can be  crosslinked), for example high density polyethylene  (HDPE),  low density polyethylene  (LDPE),  linear low  density polyethylene  (LLDPE),  branched low density  polyethylene  (BLDPE). 