Romp with oligomeric uv-absorbers
AssigneeCiba Specialty Chemicals Corporation
InventorsAlessandro Zedda, Dario Lazzari, Massimiliano Sala, Michela Bonora, Manuele Vitali, Paul Adriaan Van Der Schaaf
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Abstract
The invention relates to metathesis polymers wherein an aromatic group that has UV-light absorbing properties is attached with a bridge group to the polymer. Also disclosed is a polymerisable composition comprising a catalytically effective amount of a penta- or hexavalent ruthenium or osmium carbene catalyst, the process for preparing the metathesis polymer by applying the reaction conditions of Ring Opening Metathesis Polymerisation (=ROMP) to the polymerisable composition; and various technical applications of the metathesis polymers.
Claims22
A compound of the formula:
- A-{[Bp—(X—Y)q][B′p′—(X′—Y′)q′]Z}r (I),
- wherein
- a) one of q and q′ represents zero, one or a numeral greater than one and the other one represents one or a numeral greater than one;
- A and Z represent chain terminal groups from the chain transfer agent A(-Z)r;
- r represents a numeral from one to four;
- B and B′ independently of one another represent unsaturated or hydrogenated repeating units from cycloolefins polymerised by metathesis;
- X and X′ represent identical or different bivalent groups;
- Y and Y′ represent identical or different UV-light absorber moieties;
- and
- one of p and p′ represents zero, one or a numeral greater than one and the other one represents one or a numeral greater than one;
- or wherein
- b) q and q′ represent zero;
- A and Z represent chain terminal groups from the chain transfer agent A(-Z)r, wherein
- A represents the chain terminal group Y″—X″—, wherein
- Y″ represents a UV-light absorber moiety;
- and
- X″ represents a bivalent group;
- and
- B, B′, p, p′ and r are as defined above:
A polymerisate comprising a metathesis polymer of the formula
- A-[Bp—(X—Y)q]-A′ (I′),
- wherein
- A and A′ represent chain terminal groups from a chain transfer agent (CTA);
- B represents an unsaturated or hydrogenated repeating unit from cycloolefins polymerised by metathesis;
- X represents a bridge group which connects B with the substituent Y;
- Y represents the aromatic substituent of a UV-light absorber;
- p represents a numeral greater than one and defines the number of repeating units in the metathesis polymer;
- and
- q represents one or a numeral greater than one and defines the number of aromatic substituents Y attached with the bridge group X to B.
Dependencies are inferred from the claim text.