Zinc(ii) complex compounds as catalysts for polyurethane compositions
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一种络合化合物、组合物的技术，应用在锌有机化合物等方向，能够解决催化活性低等问题
Active Publication Date: 2014-08-13
SIKA TECH AG
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But zinc carboxylate (II) has relatively low catalytic activity aspect carbamate reaction, so in practice zinc carboxylate (II) can only be used as cocatalyst usually, for example with bismuth carboxylate ( III) or in combination with zirconium (IV) carboxylate
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Embodiment 1
[0077] Example 1: Bis(N,N-diethyl-3-oxabutyramide) zinc (II)
[0078] According to general preparation procedure A, 3.39 g of bis(acetylacetonate)zinc(II) and 4.11 g of N,N-diethyl-3-oxetanamide were reacted. 4.52 g of a yellow solid are obtained.
[0080] UV-vis: 270 (0.22). (See bis(acetylacetonate)zinc(II): 294(0.21) and 280(0.27).)
Embodiment 2
[0081] Example 2: Bis(N,N-diethyl-3-oxetanamide)zinc(II) in TEGDME
[0082] According to General Preparation Procedure B, 5.27 g of bis(acetylacetonate)zinc(II) and 6.60 g of N,N-diethyl-3-oxetanamide were reacted in 10.02 g of TEGDME. 21.89 g of a yellow solution are obtained.
Embodiment 3
[0083] Example 3: Bis(N,N-dibutyl-3-oxabutyramide) zinc (II)
[0084] According to General Preparation A, 2.76 g of bis(acetylacetonate)zinc(II) and 4.69 g of N,N-dibutyl-3-oxetanamide were reacted. 5.66 g of a viscous orange oil are obtained.
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Abstract
Zinc(II)-complex compound (I), is new. Zinc(II)-complex compound of formula (Zn(L) x(Y) 2-x) (I), is new. x : 1 or 2; Y : single negatively charged ligand; L : ligand of formula (R1-C(O ->)=C(R2)-C(=O)-N(R3)(R4)) (II); R1, R2 : H, optionally saturated 1-10C hydrocarbyl or 3-6C divalent alkylene; and R3, R4 : H, monovalent saturated hydrocarbyl (optionally containing 1-12C heteroatoms), or divalent alkylene (optionally containing 3-6C heteroatoms). Independent claims are also included for: (1) preparing (I); and (2) two-component polyurethane composition comprising at least one polyol as first component, at least one polyisocyanate as second component and zinc(II)-complex compound.
Description
technical field [0001] The present invention relates to the field of polyurethane compositions and catalysts for polyurethane compositions. Background technique [0002] Polyurethane compositions have been known for a long time and are used in many areas. In academia, it is usually divided into one-component and two-component polyurethane compositions. One-component polyurethane compositions cure under the influence of atmospheric moisture. Two-component polyurethane compositions comprise as the second component a curing agent component which mainly comprises polyamines and / or polyols. In both cases compounds or prepolymers containing isocyanate groups are used. [0003] Catalysts are added to accelerate curing. Although a large number of polyurethane catalysts are known, most polyurethane catalysts are not particularly selective with regard to the urethanization reaction (ie the reaction of the OH-groups of alcohols with isocyanate groups), but more or less also catalyz...
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