FIELD: bioengineering.
SUBSTANCE: polymer photo initiators include photo initiating fragments as lateral groups on a polymer skeleton. Described is the photo initiator that makes the copolymer of a monomer A with monomer B and monomer C, where: the monomer A is the monomer-photo initiator A of formula 
wherein: Pi is a photo initiating fragment composed of benzophenone or thioxanthone; Z is a linker fragment selected from an ordinary bond, optionally substituted C1-C12 alkylene and the group -[O-(C1-C12alkylene)]n-; X1 and X2 are an optionally substituted C1-C12 alkylene; where X1 and X2 or a part thereof can be bonded with each other or with Z to make one or several ring structures; where Z, X1 and X2 are selected so that N is a tertiary amine; W1 and W2 are alcohol groups; the monomer (B) includes at least two functional groups W3 and W4. The said groups W3 and W4 are isocyanate groups where W1, W2, W3 and W4 are selected so that, at the copolymerisation of the monomers (A) and (B), W1 reacts with W3 to form an urethane fragment while W2 reacts with W4 to make an urethane fragment, the monomer (C) has the structure of formula 
W5-T-W6, where W5 and W6 are alcohol groups, and where T is selected from the group consisting of an optionally substituted C1-C12 alkylene, optionally substituted C1-C12 alkylene, optionally substituted C3-C12 heterocyclil, optionally substituted aryl, optionally substituted diaryl, -[O-(C1-C12 alkylene)]m-, -[S-(C1-C12 alkylene)]m-, where m is the integer of 1 to 1000, and combinations thereof. Besides, this invention discloses the production of the polymer photo initiator including the stepwise copolymerisation of the monomer A with monomer B and monomer C, cross-linking of the said polymer photo initiator including subjecting of the latter to UV radiation and/or heating, and application thereof as the photo initiator of radical polymerisation.
EFFECT: decreased or ruled out withdrawal of the photo initiator and photo initiating by-products.
17 cl, 3 dwg, 2 tbl, 8 ex
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