Mixed prepolymer of solidifying agent methyl diphenylene diisocyanate and 1,6-hexamethylene diisocyanate and its preparation method

A technology of hexamethylene diisocyanate and diphenylmethane, which is applied in the field of adhesive curing agent prepolymer and its preparation, polyurethane coatings, and can solve the problems of complex manufacturing process and low yield
CN101402716BInactive Publication Date: 2012-01-11FOSHAN JINGXIN HUIMING TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FOSHAN JINGXIN HUIMING TECH CO LTD
Publication Date
2012-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a curing agent compound prepolymer composed of diphenylmenthane diisocyanate and 1, 6-hexamethylene diisocyanate and a preparation method thereof. The method comprises the following steps: MDI and an organic solvent are added and heated to 65 DEG C, polybasic alcohol is added and reacts with the mixture for 2 hours to 4 hours to obtain an MDI modifier; HID, an organic solvent and polybasic alcohol are added, heated and react for 2 hours to 5 hours, then the temperature is reduced below 70 DEG C, a TMP and organic solvent mixture is added, reaction at 70 DEG C lasts for 1 hour to 4 hours and 1 hour to 4 hours when the temperature is between 60 DEG C and 100 DEG C so as to obtain an HDI-MDI compound prepolymer curing agent. The method mixes and pre-polymerizes MDI and HDI, integrates the excellent performance of the two, produces a series of polyurethane curing agents with wide application range, high strength, good yellow-changing resistance, high curing speed,low toxicity, good storage stability and high solid content and has simple production technique.
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Description

technical field

[0001] The invention relates to a polyurethane coating, an adhesive curing agent prepolymer and a preparation method thereof, in particular to a diphenylmethane diisocyanate and 1,6-hexamethylene diisocyanate mixed prepolymer and a preparation method thereof. Background technique

[0002] Polyurethane materials have many advantages and are used more and more widely in various industries. Toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI) and hexamethylene diisocyanate (HDI) are isocyanates with different structures. They each endow products with different properties and play unique advantages in different application fields. There are certain limitations of use. TDI and MDI belong to aromatic isocyanate, the NCO group is directly connected to the benzene ring, and it is easy to form a quinone-type chromogenic group under ultraviolet irradiation. Its itself and its polyurethane products will yellow when exposed to natural light for a long time. Th...

Claims

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