Bio-based pentamethylene diisocyanate curing agent and preparation method and application thereof

A pentamethylene diisocyanate, bio-based technology, used in organic chemistry, chemical recycling, polyurea/polyurethane coatings, etc., can solve problems such as affecting product appearance and performance, unsatisfactory catalyst dispersion, and troublesome separation. Good chemical resistance, stable and controllable reaction process, and reduced preparation costs
CN112079979BActive Publication Date: 2022-08-09CNOOC CHANGZHOU PAINT & COATINGS IND RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
Publication Date
2022-08-09

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Abstract

The invention relates to a method for preparing a polyisocyanate containing allophanate and isocyanurate groups, in particular to a bio-based pentamethylene diisocyanate curing agent and a preparation method and application thereof. The preparation method of the bio-based pentamethylene diisocyanate curing agent provided by the present invention can prepare the polyisocyanate curing agent containing allophanate and isocyanurate groups. The concentration of hydrolyzed chlorine is 0-50ppm. After the PDI monomer and the catalyst A are mixed, pre-react for 0~5h, the PDI trimer catalyst is added dropwise at a constant speed under the dilution of the mixed solvent (solvent B and solvent C), and the polymerization reaction is carried out, and the conversion rate reaches 30%- 40%, add polymerization inhibitor to terminate the reaction, add antioxidant D, and obtain PDI type polyisocyanate composition through two-stage separation of thin film evaporator and molecular still, the residual PDI monomer in the product is ≤ 0.5%, the viscosity is low, Light color, good compatibility with hydroxyl resin, high reactivity, high gloss, good chemical resistance and so on.
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Description

Technical field

[0001] The present invention is the field of polykeexate curing agent technology. Specifically, it involves a biological basal type of pinomar methalisanopalonate curing agent and its preparation methods and applications. Background technique

[0002] In recent years, in my country's high -performance polyurethane coating industry, the research on biological types of polytyorne polymers has attracted more and more attention and research by relevant scientific and technical personnel at home and abroad. Polycisiest is an indispensable part of polyurethane resin, which is directly related to the comprehensive physical and chemical performance of materials. The aromatherapy polykeein, such as TDI and MDI, has a rigid benzene ring structure and has certain limitations in terms of weather resistance. Therefore, fatty polynal esters such as IPDI and HDI (Six Asian methylbiablybly) are becoming more and more popular, especially the direct -chain fat structure HDI. A cert...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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