Peelable and biodegradable polyurethane protective film, preparation method and application thereof
A biodegradable polyester and biodegradable technology, which is applied in the field of peelable biodegradable polyurethane protective film and its preparation, can solve the problems of poor mechanical properties, volatilization of organic solvents, and a large amount of waste, and achieve good anti-corrosion performance and durability. Effect of degradability, high elasticity and tensile strength, good biodegradability
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Embodiment 1
[0027] The present invention adopts polyester polyurethane as the method for the preparation of peelable biodegradable protective film of film-forming substrate, comprises the following steps:
[0028] The strippable biodegradable protective film of the present invention, its composition and each component weight portion are as follows: thermoplastic polyurethane 40g, biodegradable polyester (polylactic acid) 10g, corrosion inhibitor 0.5g (amino acid), filler 1g (silicon Alite), plasticizer 5g (glycerin, glyceryl citrate).
[0029] The preparation method of the strippable biodegradable protective film of the present invention comprises:
[0030] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;
[0031] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into an internal mixer, control the temperature at 140°C, and stir and mix for ...
Embodiment 2
[0036] Polyester polyurethane is the preparation method of the strippable biodegradable protective film of film-forming substrate, and its production steps are:
[0037] The strippable biodegradable protective film of the present invention, its composition and the parts by weight of each component are as follows: thermoplastic polyurethane 50g, biodegradable polyester (polybutylene succinate) 15g, corrosion inhibitor 0.35g (amino acid) , filler 2g (diatomaceous earth), plasticizer 15g (glycerin, glyceryl citrate).
[0038] The preparation method of the strippable biodegradable protective film of the present invention comprises:
[0039] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;
[0040] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into the internal mixer, control the temperature at 150°C, stir and mix for 9 minutes un...
Embodiment 3
[0045] Polyester polyurethane is the preparation method of the strippable biodegradable protective film of film-forming substrate, and its production steps are:
[0046] The strippable biodegradable protective film of the present invention has the following composition and parts by weight of each component: thermoplastic polyurethane 65g, biodegradable polyester (polycaprolactone) 20g, corrosion inhibitor 0.25g (amino acid), filler 3g (diatomaceous earth), plasticizer 20g (glycerin, glyceryl citrate).
[0047] The preparation method of the strippable biodegradable protective film of the present invention comprises:
[0048] 1) material selection: select materials according to the composition specified in the above formula and the parts by weight of each component;
[0049] 2) Put thermoplastic polyurethane, biodegradable polyester, plasticizer, filler, and corrosion inhibitor into the internal mixer, control the temperature at 160°C, stir and mix for 11 minutes until all comp...
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