Elastic coating and preparation method thereof

A technology of elastic coatings and prepolymers, applied in the field of coatings, can solve the problems of poor mechanical strength of coatings, not resistant to wind and sand erosion, not suitable for outdoor use, etc., and achieve high transparency

Active Publication Date: 2018-07-06
BEIJING HANGBO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coatings made of current polyurethane coatings have poor mechanical strength, are not resistant to wind and sand erosion, and are not suitable for outdoor use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Prepare solvent: mix 20kg of diacetone alcohol, 55kg of propylene glycol methyl ether acetate, and 25kg of butyl acetate to obtain a mixed solution as a solvent for future use.

[0022] Preparation of polyether polyol prepolymer: mix 10kg polytetrahydrofuran diol and 5kg polyoxypropylene triol with 15kg 4,4'-dicyclohexylmethane diisocyanate, add 30kg solvent, and add 0.2kg drier, stir After uniformity, react at 70° C. for 7 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 50% and an average molecular weight of 20,000.

[0023] Preparation of hydroxyacrylate: mix 15kg of hydroxypropyl methacrylate with 5kg of methyl methacrylate, 5kg of butyl methacrylate and 5kg of butyl acrylate, add 30kg of solvent, and add 0.2kg of dibenzoyl peroxide, Stir evenly and react at 70° C. for 6 hours to obtain a hydroxy acrylic resin with a solid mass fraction of 55%, an average molecular weight of 20,000, and a hydroxyl mass percentage of 5.86%.

[0024] Get pr...

Embodiment 2

[0033] Preparation of solvent: mix 10kg of diacetone alcohol, 60kg of propylene glycol methyl ether acetate, and 30kg of butyl acetate as a solvent for future use.

[0034] Preparation of polyether polyol prepolymer: mix 5kg polytetrahydrofuran diol, 10kg polyoxypropylene triol, 10kg isophorone diisocyanate, 5kg hexamethylene diisocyanate, add 30kg solvent, and add 0.3kg to dry agent, stirred evenly and reacted at 70°C for 6 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 50% and a molecular weight of 5000.

[0035] Preparation of hydroxyacrylic resin: mix 20kg of hydroxypropyl methacrylate with 10kg of methyl methacrylate, 10kg of butyl methacrylate and 10kg of butyl acrylate, add 50kg of solvent, and add 0.1kg of diperoxide Benzoyl was stirred evenly and reacted at 70°C for 6 hours to obtain a hydroxy acrylic resin with a solid mass fraction of 50%, a molecular weight of 30,000, and a hydroxyl mass percentage of 4.7%.

[0036] Get prepared solven...

Embodiment 3

[0039] Preparation of solvent: mix 20kg of diacetone alcohol, 50kg of propylene glycol methyl ether acetate, and 30kg of butyl acetate to obtain a mixed solution as a solvent for future use.

[0040]Preparation of polyether polyol prepolymer: mix 15kg polytetrahydrofuran diol, 20kg polyoxypropylene triol with 15kg4,4'-dicyclohexylmethane diisocyanate, 10kg isophorone diisocyanate, 10kg hexamethylene diisocyanate Mix, add 70kg of solvent, and add 0.2kg of drier, stir evenly and react at 75°C for 8 hours to obtain a polyether polyol prepolymer with a solid mass fraction of 60%, and its average mass fraction is 10,000.

[0041] Preparation of hydroxyacrylic resin: mix 10kg hydroxypropyl methacrylate, 10kg hydroxyethyl methacrylate, 5kg hydroxypropyl acrylate with 10kg methyl methacrylate, 10kg butyl methacrylate and 5kg butyl acrylate, add and Solvent with the same total mass of the above monomers, and add an appropriate amount of dibenzoyl peroxide, stir evenly and react at 70°C...

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Abstract

The invention discloses an elastic coating and a preparation method thereof, wherein the elastic coating comprises the following components in parts by weight: 5-30 parts of hydroxyl acrylic resin; 5-30 parts of polyether polyol prepolymer; 0.2-30 parts of drier 2 parts; leveling agent 0.2‑1 part; defoamer 0.1‑1 part; light stabilizer 0.1‑0.5 part; antioxidant 0‑0.5 part; solvent 40‑60 part; curing agent 0.5‑10 part. The elastic coating of the invention has good transparency, abrasion resistance and weather resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an elastic coating and a preparation method thereof. Background technique [0002] Polyurethane coating is a kind of coating with a large amount and a wide range in modern coatings, endowing it with the functions of decoration and protection. Elastic coating, also known as hand paint, is a two-component polyurethane coating with flexible polyester as the main raw material and aliphatic isocyanate curing agent. [0003] There are more and more studies on polyurethane coatings. For example, patent CN102229782A discloses a preparation method of PU elastic paint, which uses hydroxyl linear polyester resin as elastic resin, and mixes with elastic powder, drier, matting powder and organic silicon. Formed, the paint film feels rich, soft luster. Patent CN102335652A discloses a hand-feeling elastic paint spraying process, using straight-chain polyester resin with hydroxyl or modified ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/08C09D133/14C09D7/63C08F220/28C08F220/14C08F220/18C08G18/48C08G18/75C08G18/73
Inventor 张运生李旭
Owner BEIJING HANGBO NEW MATERIAL TECH
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