Acrylic thio monomers
AssigneeSola International Holdings Ltd.
InventorsHuan Kiak Toh, Fang Chen, Chong Meng Kok
Life of this patent
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Abstract
A cross-linkable polymeric casting composition includes an effective amount of an acrylic or methacrylic di- or polythiol monomer of the formula (1) wherein p is an integer of 0 or 1, M or M′ are each spacer groups selected from one or more of the following formulae (i), (ii) wherein m is an integer of 0 or 1 and n is an integer of 0 to 3, with the proviso that m and n are not both equal to zero, R1R2, R3 and R4, which may be the same or different, are selected from hydrogen, alkyl or substituted alkyl of 1 to 10 carbon atoms, alkoxy or substituted alkoxy of 1 to 10 carbon atoms, or R1 or R2 is (iii) and optionally a polymerisable comonomer.
Claims30
A cross-linking polymeric casting composition including
- (A) an effective amount of an acrylic or methacrylic tri- or tetra-thiol monomer of the formula:
- wherein
- p is an integer of 0 or 1
- M and M′ are each spacer groups selected from one or more of the following
- wherein m is an integer of 0 or 1 and n is an integer of 0 to 3, with the proviso that m and n are not both equal to 0 R1 and R2, which may be the same or different, are selected from hydrogen, alkyl or substituted alkyl of 1 to 10 carbon atoms, alkoxy or substituted alkoxy of 1 to 10 carbon atoms, or R5 of the formula:
- wherein at least one of R1 and R2 is R5 and wherein R3 and R4, which may be the same or different, are selected from hydrogen and methyl;
- and
- (B) optionally a polymerizable comonomer.
A cross-linkable polymeric casting composition including
- (A) an effective amount of trithiomethacrylate having the formula:
- and
- (B) a polymerizable comonomer.
A method of preparing a polymeric article which method includes
- (A) providing a cross-linking polymeric casting composition including
- (i) an effective amount of an acrylic or methacrylic tri-or tetra-thiol monomer of the formula:
- wherein
- p is an integer of 0 or 1
- M and M′ are each spacer groups selected from one or more of the following
- wherein m is an integer of 0 or 1 and n is an integer of 0 to 3, with the proviso that m and n are not both equal to 0 R1 and R2, which may be the same or different, are selected from hydrogen, alkyl or substituted alkyl of 1 to 10 carbon atoms, alkoxy or substituted alkoxy of 1 to 10 carbon atoms, or R5 of the formula:
- wherein at least one of R1 and R2 is R5 and wherein R3 and R4, which may be the same or different, are selected from hydrogen and methyl;
- (ii) a heat and/or UV curing agent;
- and
- (iii) optionally a polymerizable comonomer;
- and
- (B) mixing the polymeric casting composition and curing agent;
- and
- (C) subjecting the mixture to a cross-linking step.
A method of preparing a polymeric article which method includes
- (A) providing a cross-linking polymeric casting composition including
- (i) an effective amount of trithiomethacrylate having the formula:
- (ii) a heat and/or UV curing agent;
- and
- (iii) a polymerizable comonomer;
- and
- (B) mixing the polymeric casting composition and curing agent;
- and
- (C) subjecting the mixture to a cross-linking step.
An ophthalmic lens element formed from a crosslinking polymeric casting composition including
- (A) an effective amount of an acrylic or methacrylic tri-or tetra-thiol of the formula:
- wherein
- p is an integer of 0 or 1
- M and M′ are each spacer groups selected from one or more of the following
- wherein m is an integer of 0 or 1 and n is an integer of0 to 3, with the proviso that m and n are not both equal to 0 R1 and R2, which may be the same or different, are selected from hydrogen, alkyl or substituted alkyl of 1 to 10 carbon atoms, alkoxy or substituted alkoxy of 1 to 10 carbon atoms, or R5 of the formula:
- wherein at least one of R1 and R2 is R5 and wherein R3 and R4, which may be the same or different, are selected from hydrogen and methyl;
- and
- (B) optionally a polymerizable comonomer;
- wherein the ophthalmic lens element has an overall refractive index in the range of approximately 1.58 to 1.70.
An ophthalmic lens element formed from a crosslinking polymeric casting composition including
- (A) an effective amount of trithiomethacrylate having the formula:
- and
- (B) a polymerizable comonomer that includes an methacrylate derivative of a cycloolefin that comprises approximately 5 to 60% by weight of the casting composition;
- wherein the ophthalmic lens element has an overall refractive index in the range of approximately 1.58 to 1.70.
Dependencies are inferred from the claim text.