Microstructured components

Details Microstructured components Microstructured components

2002-10-31

2004-07-13

Cheung, William (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S282000, C526S308000, C219S121600

Reexamination Certificate

active

06762265

ABSTRACT:

The present invention relates to microstructured components comprising at least one cycloolefin copolymer, to a process for producing these microstructured components, and also to the use of these microstructured components.
DD-A-211 801 and DD-A-211 802 disclose processes for modifying the surface properties of olefin copolymers as semifinished parts and molding materials. The semifinished parts and molding materials comprise ethylene-norbornene copolymer or a combination of ethylene-norbornene copolymer with thermoplastics, fillers, reinforcing materials and plastics auxiliaries. The modification is carried out by treatment with ionizing radiation or by chemical etching. The treatment achieves an improvement in the bondability, printability, metallizability and adhesion of surface coatings to the surface of the semifinished part or molding material. The treatment is carried out at a temperature of from 340 K to 410 K.
It is known from US-A-5,334,424 that the surface roughness of articles based on saturated norbornene resins can be reduced to <0.05 &mgr;m by polishing.
Journal of Photopolymer Science and Technology, Volume 10, No. 2 (1997) 159-166, describes processes based on the interaction of laser radiation with polymers.
Y. Nakayama, T. Matsuda in J. Biomed. Res., 29, 1295 (1995) disclose rates of removal of material at an energy flux of 1 J/cm
2
using excimer lasers.
It is an object of the present invention to provide microstructured components having a very finely gradated height profile and a very low surface roughness and also to provide an economical and environmentally friendly process for producing microstructured components. For the purposes of the invention, microstructured components are components which have structures in the micron range and below.
The object of the present invention is achieved by microstructured components comprising cycloolefin copolymers.
The microstructured components of the invention comprise at least one cycloolefin copolymer which comprises polymerized units derived from at least one cyclic, in particular polycyclic, olefin and optionally at least one acyclic olefin. The term cycloolefin polymer encompasses both cycloolefin copolymers and cycloolefin homopolymers.
The microstructured components of the invention comprise at least one cycloolefin copolymer comprising from 0.1 to 100% by weight, preferably from 0.1 to 99.9% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from at least one polycyclic olefin of the formula I, II, II′, III, IV, V or VI
where R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
are identical or different and are each a hydrogen atom or a C
1
-C
20
-hydrocarbon radical such as a linear or branched C
1
-C
8
-alkyl radical, a C
6
-C
18
-aryl radical, a C
7
-C
20
-alkylenearyl radical, a cyclic or acyclic C
2
-C
20
-alkenyl radical or form a saturated, unsaturated or aromatic ring, where identical radicals R
1
to R
8
in the various formulae I to VI may have different meanings, and n can be from 0 to 5, and from 0 to 99.9% by weight, preferably from 0.1 to 99.9% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more acyclic olefins of the formula VII
where R
9
, R
10
, R
11
and R
12
are identical or different and are each a hydrogen atom, a linear, branched, saturated or unsaturated C
1
-C
20
-hydrocarbon radical such as a C
1
-C
8
-alkyl radical or a C
6
-C
18
-aryl radical.
In addition, the cycloolefin copolymers used according to the invention for microstructured components may comprise from 0 to 45% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more monocyclic olefins of the formula VIII
where m is from 2 to 10.
For the purposes of the invention, preference is given to cycloolefin copolymers which comprise polymerized units derived from polycyclic olefins of the formula I or III and polymerized units derived from acyclic olefins of the formula VII.
Particular preference is given to cycloolefin copolymers which comprise polymerized units derived from olefins having a norbornene skeleton, very particularly preferably derived from norbornene and tetracyclododecene and, if desired, vinylnorbornene or norbornadiene. Particular preference is also given to cycloolefin copolymers which comprise polymerized units derived from acyclic olefins having terminal double bonds, e.g. &agr;-olefins having from 2 to 20 carbon atoms, very particularly preferably ethylene or propylene. Exceptional preference is given to norbornene/ethylene and tetracyclododecene/ethylene copolymers.
The cycloolefin copolymers used according to the invention can be prepared at temperatures of from −78 to 200° C. and a pressure of from 0.01 to 200 bar in the presence of one or more catalyst systems comprising at least one transition metal compound and optionally a cocatalyst and optionally a support material. Suitable transition metal compounds are metallocenes, in particular stereorigid metallocenes. Examples of catalyst systems which are suitable for preparing the cycloolefin copolymers used according to the invention are described in EP-A407 870, EP-A485 893 and EP-A-503 422. These references are hereby expressly incorporated by reference.
Examples of transition metal compounds used are:
rac-dimethylsilylbis(1 -indenyl)zirconium dichloride,
rac-dimethylgermylbis(1-indenyl)zirconium dichloride,
rac-phenylmethylsilylbis(1-indenyl)zirconium dichloride,
rac-phenylvinylsilylbis(1-indenyl)zirconium dichloride,
1-silacyclobutylbis(1-indenyl)zirconium dichloride,
rac-diphenylsilylbis(1 -indenyl)hafnium dichloride,
rac-phenylmethylsilylbis(1-indenyl)hafnium dichloride,
rac-diphenylsilylbis(1-indenyl)zirconium dichloride,
rac-ethylene-1,2-bis(1-indenyl)zirconium dichloride,
dimethylsilyl-(9-fluorenyl)(cyclopentadienyl)zirconium dichloride,
diphenylsilyl-(9-fluorenyl)(cyclopentadienyl)zirconium dichloride,
bis(1-indenyl)zirconium dichloride,
diphenylmethylene-(9-fluorenyl)cyclopentadienylzirconium dichloride,
isopropylene-(9-fluorenyl)cyclopentadienylzirconium dichloride,
rac-isopropylidenebis(1-indenyl)zirconium dichloride,
phenylmethylmethylene-(9-fluorenyl)cyclopentadienylzirconium dichloride,
isopropylene-(9-fluorenyl)(1-(3-isopropyl)cyclopentadienyl)zirconium dichloride,
isopropylene-(9-fluorenyl)(1-(3-methyl)cyclopentadienyl)zirconium dichloride,
diphenylmethylene-(9-fluorenyl)(1-(3-methyl)cyclopentadienyl)zirconium dichloride,
methyl phenylmethylene(9-fluorenyl)(1-(3-methyl)cyclopentadienyl)zirconium dichloride,
dimethylsilyl-(9-fluorenyl)(1-(3-methyl)cyclopentadienyl)zirconium dichloride,
diphenylsilyl-(9-fluorenyl)(1-(3-methyl)cyclopentadienyl)zirconium dichloride,
diphenylmethylene-(9-fluorenyl)(1-(3-tert-butyl)cyclopentadienyl)zirconium dichloride,
isopropylene-(9-fluorenyl)(1-(3-tert-butyl)cyclopentadienyl)zirconium dichloride,
isopropylene(cyclopentadienyl)(1-indenyl)zirconium dichloride,
diphenylcarbonyl(cyclopentadienyl)(1-indenyl)zirconium dichloride,
dimethylsilyl(cyclopentadienyl)(1-indenyl)zirconium dichloride,
isopropylene(methylcyclopentadienyl)(1-indenyl)zirconium dichloride,
4-(&eegr;
5
-cyclopentadienyl)4,7,7-trimethyl-(&eegr;
5
-4,5,6,7-tetrahydroindenyl)zirconium dichloride,
[4-(&eegr;
5
-cyclopentadienyl)4,7,7-triphenyl-(&eegr;
5
-4,5,6,7-tetrahydroindenyl)]zirconium dichloride,
[4-(&eegr;
5
-cyclopentadienyl)-4,7-dimethyl-7-phenyl-(&eegr;
5
-4,5,6,7-tetrahydroindenyl)]zirconium dichloride,
[4-(&eegr;
5
-3′-tert-butylcyclopentadienyl)-4,7,7-triphenyl-(&eegr;
5
-4,5,6,7-tetrahydroindenyl)]zirconium dichloride,
[4-(&eegr;
5
-3′-tert-butylcyclopentadienyl)-4,7-dimethyl-7-phenyl-(&eegr;
5
-4,5,6,7-tetrahydroindenyl)]zirconium dichloride,
[4-(&eegr;
5
-3′-methylcyclopentadienyl)4,7,7-trimethyl-(&eegr;
5
-4,5,6,7-tetrahydro-indenyl)]zirconium dichloride, 5
[4-(&eegr;
5
-3′-methylcyclopentadienyl)-4,7,7-triphenyl-(&eegr;
5
-4,5,6,7-tetrahydro-indenyl)]zirconium dichloride, 5

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