A kind of starch-grafted polyurethane polymer and its preparation method and application in biodegradable condom

Abstract

The invention discloses a starch-grafted polyurethane polymer, a preparation method and application thereof in biodegradable condoms. The starch-grafted polyurethane polymer is obtained by taking starch and isocyanate as the main raw materials and carrying out two grafting reactions and self-addition reaction, contains isocyanic acid structure and glucose unit, and has no free isocyanato group. The preparation method fully guarantees the good compatibility, film-forming property, wettability, viscosity, dispersibility and the like of the product, also does not contain free isocyanic acid, andhas good curing performance and aging resistance. The condoms produced with the starch-grafted polyurethane polymer as the main raw material have better tensile strength, blasting volume and barrier properties than ordinary polyurethane condoms, and the use experience is more comfortable. The starch-grafted polyurethane structure in the condoms not only has stable use performance, but also has biodegradable characteristic, and reflects the advantages of renewable and promising environmental protection advantages.

Description

technical field [0001] The invention relates to the technical field of organic polymer materials, in particular to a starch-grafted polyurethane polymer, a preparation method thereof and an application in a biodegradable condom. Background technique [0002] Condom is one of the tools to prevent conception in non-drug form, and it can also effectively prevent the transmission of pathogens such as sexually transmitted diseases and AIDS. Therefore, the condom has a double protection function, which can not only effectively prevent pregnancy, but also prevent diseases that are transmitted through sexual behavior, prevent infection, and bring people a pleasant and free sexual experience. Therefore, condoms are also called condoms, condoms, wishful sets, etc. As a simple and effective physical isolation contraceptive method, they are promoted and used by governments all over the world. With the development of China's economy, people's living standards are also improving, and the...

AI Technical Summary

Problems solved by technology

Natural latex is currently the most widely used condom material, but natural latex condoms have their own shortcomings: low thermal conductivity, easy oxidation, poor oil resistance and solvent resistance; the material contains ingredients such as allergic water-soluble proteins, which are easy to use Some consumers have allergic reactions such as erythema and itching, which cause strong discomfort reactions; during the vulcanization process, strong carcinogens such as nitrosamines are also produced

However, many condoms reported so far are not completely biodegradable materials. Judging from the annual usage of condoms, this is bound to become another huge "white garbage", polluting our living environment and harming human beings. health is also greatly affected