Patent ID: 7264749

Claim:
An alkyne compound of the formula I P 1 —Y 1 -A 1 -Y 3 -(T 1 -B 1 ) m -T 3 -C≡C-T 4 -(B 2 -T 2 -) n -Y 4 -A 2 -Y 2 —P 2 (I) in which P 1 , P 2 are each, independently of one another, hydrogen, C 1 -C 12 -alkyl, a polymerizable group, a group suitable for polymerization or a radical having a polymerizable group or a group suitable for polymerization, Y 1 , Y 2 , Y 3 , Y 4 are each, independently of one another, a single chemical bond, —O—, —S—, —CO—, —CO—O—, —O—CO—, —CO—N(R)—, —(R)N—CO—, —O—CO—O—, —O—CO—N(R)—, —(R)N—CO—O— or —(R)N—CO—N(R)—, B 1 , B 2 are each, independently of one another, —C≡C—, a single chemical bond, —O—, —S—, —CO—, —CO—O—, —O—CO—, —CO—N(R)—, —(R)N—CO—, —O—CO—O—, —O—CO—N(R)—, —(R)N—CO—O— or —(R)N—CO—N(R)—, R, at each occurrence and independently of the meaning in Y 1 to Y 4 , B 1 and B 2 , is hydrogen or C 1 -C 4 -alkyl, A 1 , A 2 are each, independently of one another, a single chemical bond or a spacer having from one to 30 carbon atoms, T 1 , T 2 , T 3 , T 4 are each, independently of one another, a divalent saturated or unsaturated carbocyclic or heterocyclic radical, and m, n are each, independently of one another, 0 or 1, wherein at least one pair of P 1 —Y 1 and Y 3 or one pair of Y 2 —P 2 and Y 4 are acrylate or methacrylate and —O—CO—O—.