Anti-aging polyurethane material, preparation method and application thereof

Abstract

The invention relates to an anti-aging polyurethane material, a preparation method and application. The anti-aging polyurethane material comprises a polyol composition and an isocyanate prepolymer, wherein the polyol composition comprises the following components by weight: 55-70% of bisphenol A / polyoxyalkylene, 20-35% of polyoxyalkylene alcohol, 2-8% of a low molecular alcohol compound, 0.2-0.7% of an impregnating compound, 5-10% of an oxazolidine compound, 0.1-0.5% of a defoaming agent and 0.05-0.2% of a catalyst, the isocyanate prepolymer comprises the following components in percentage by weight: 85-95% of isocyanate and 5-15% of polyether amine, and further comprises a polymerization inhibitor accounting for 0.01-0.03% of the total weight of the isocyanate and the polyether amine. Theanti-aging polyurethane material has relatively high heat aging resistance and damp-heat aging resistance.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to an aging-resistant polyurethane material, a preparation method and an application. Background technique

[0002] Research on the preparation and performance of polyurethane resin composite materials, Zhao Qingbo, master's degree thesis of Beijing University of Chemical Technology, disclosed the urethane bond structure in the molecular structure of polyurethane, which makes this resin material excellent in mechanical properties, and has excellent chemical resistance and chemical resistance. Aging. Its main raw materials include polyisocyanate (including diisocyanate) and polymeric polyol (polyether and polyester), as well as chain extenders, such as small molecule diols BDO, TMP, or amines such as MOCA.

[0003] The preparation method of polyurethane resin comprises three kinds,

[0004] 1. One-step method, that is, directly mix polyisocyanate with polymer ...

Examples

Embodiment 1

[0048] A component preparation:

[0049] Hydroxyl value 250mg / KOH / g, bisphenol A / polyoxyethylene ether 65wt% with a functionality of 2, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 350mg / KOH / g is poly Propylene oxide trihydric alcohol 25wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) are mixed, and the temperature is raised to 120°C , dehydration for 2 hours under vacuum ≤-0.95MPa, control the water content ≤0.05%, cool down to room temperature, add defoamer BYK-088 0.4wt%, oxazolidine-type water-absorbing agent ALT-301 5wt%, mix evenly, and seal it for storage.

[0050] B component preparation:

[0051] The total amine content accounts for ≥96% of the total end groups, the acetylation value is 280mg / KOH / g, the polyetheramine D400 with a functionality of 2 is dehydrated at 6.5wt%, and the water content is ≤0.05%. The material is cooled to room tempe...

Embodiment 2

[0056] Preparation of component A: hydroxyl value 300mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 60wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 300mg / KOH / g is polyethylene oxide trihydric alcohol 30wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) 0.1wt % mixed, heated to 110°C-125°C, dehydrated for 1.5h-2.5h under vacuum degree ≤-0.95MPa, controlled water content ≤0.05%, cooled to room temperature and added defoamer BYK-060N 0.4wt%, oxazolidine Water-absorbing agent ALT-101 5wt% is mixed evenly and sealed for storage.

[0057] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 200mg / KOH / g, the functionality is 2 polyetheramine SD401 7.2wt% dehydration, the water content is ≤0.05%, the material is cooled to room temperature, Add 0.01wt% of side reacti...

Embodiment 3

[0061] Preparation of component A: hydroxyl value 150mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 55wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 600mg / KOH / g is 35wt% of polyoxyethylene glycol, 4wt% of 1.2-propylene glycol, 0.5wt% of wetting agent BYK310, and 0.1wt% of catalyst (B41 and bismuth isooctanoate ratio 1:1 produced by Japan Tosao Co., Ltd.) , heat up to 110°C-125°C, dehydrate under vacuum ≤-0.95MPa for 1.5h-2.5h, control the water content ≤0.05%, cool down to room temperature and add defoamer BYK-060N 0.4wt%, oxazolidine water-absorbing agent SL-1015wt% mixed evenly and sealed for storage.

[0062] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 370KOH / g, the functionality is 3 polyetheramine AMT403 5.7wt%, the water content is ≤0.05%, the material is cooled to room temperature, and the side reaction is added Inhibitor benzoyl ch...

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to an aging-resistant polyurethane material, a preparation method and an application. Background technique

[0002] Research on the preparation and performance of polyurethane resin composite materials, Zhao Qingbo, master's degree thesis of Beijing University of Chemical Technology, disclosed the urethane bond structure in the molecular structure of polyurethane, which makes this resin material excellent in mechanical properties, and has excellent chemical resistance and chemical resistance. Aging. Its main raw materials include polyisocyanate (including diisocyanate) and polymeric polyol (polyether and polyester), as well as chain extenders, such as small molecule diols BDO, TMP, or amines such as MOCA.

[0003] The preparation method of polyurethane resin comprises three kinds,

[0004] 1. One-step method, that is, directly mix polyisocyanate with polymer ...

Examples

Embodiment 1

[0048] A component preparation:

[0049] Hydroxyl value 250mg / KOH / g, bisphenol A / polyoxyethylene ether 65wt% with a functionality of 2, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 350mg / KOH / g is poly Propylene oxide trihydric alcohol 25wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) are mixed, and the temperature is raised to 120°C , dehydration for 2 hours under vacuum ≤-0.95MPa, control the water content ≤0.05%, cool down to room temperature, add defoamer BYK-088 0.4wt%, oxazolidine-type water-absorbing agent ALT-301 5wt%, mix evenly, and seal it for storage.

[0050] B component preparation:

[0051] The total amine content accounts for ≥96% of the total end groups, the acetylation value is 280mg / KOH / g, the polyetheramine D400 with a functionality of 2 is dehydrated at 6.5wt%, and the water content is ≤0.05%. The material is cooled to room tempe...

Embodiment 2

[0056] Preparation of component A: hydroxyl value 300mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 60wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 300mg / KOH / g is polyethylene oxide trihydric alcohol 30wt%, diethylene glycol 4wt%, wetting agent BYK310 0.5wt%, catalyst (B41 produced by Japan Tosao Co., Ltd. and bismuth isooctanoate ratio 1:1) 0.1wt % mixed, heated to 110°C-125°C, dehydrated for 1.5h-2.5h under vacuum degree ≤-0.95MPa, controlled water content ≤0.05%, cooled to room temperature and added defoamer BYK-060N 0.4wt%, oxazolidine Water-absorbing agent ALT-101 5wt% is mixed evenly and sealed for storage.

[0057] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 200mg / KOH / g, the functionality is 2 polyetheramine SD401 7.2wt% dehydration, the water content is ≤0.05%, the material is cooled to room temperature, Add 0.01wt% of side reacti...

Embodiment 3

[0061] Preparation of component A: hydroxyl value 150mg / KOH / g, bisphenol A / polyoxypropylene ether with a functionality of 2 55wt%, double metal cyanide complex catalysis, unsaturation 0.02mmol / g, hydroxyl value 600mg / KOH / g is 35wt% of polyoxyethylene glycol, 4wt% of 1.2-propylene glycol, 0.5wt% of wetting agent BYK310, and 0.1wt% of catalyst (B41 and bismuth isooctanoate ratio 1:1 produced by Japan Tosao Co., Ltd.) , heat up to 110°C-125°C, dehydrate under vacuum ≤-0.95MPa for 1.5h-2.5h, control the water content ≤0.05%, cool down to room temperature and add defoamer BYK-060N 0.4wt%, oxazolidine water-absorbing agent SL-1015wt% mixed evenly and sealed for storage.

[0062] Preparation of component B: the total amine content accounts for ≥96% of the total end groups, the acetylation value is 370KOH / g, the functionality is 3 polyetheramine AMT403 5.7wt%, the water content is ≤0.05%, the material is cooled to room temperature, and the side reaction is added Inhibitor benzoyl ch...

Images