A kind of environment-friendly high-hardness and high-transparency polyurethane resin and preparation method thereof
A polyurethane resin, high hardness technology, applied in the field of polyurethane resin, can solve the problems of easy yellowing, poor toughness, non-compliance with environmental protection requirements, etc., and achieve the effects of low linear shrinkage, high strength, excellent yellowing resistance and transparency
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Embodiment 1
[0035] An environmentally friendly high-hardness and high-transparency polyurethane resin, comprising the following raw materials in parts by weight: 65 parts by weight of a polymer and 100 parts by weight of a curing agent;
[0036] The polymer is composed of the following raw materials by weight: 96 parts by weight of castor oil-modified polyester polyol with a hydroxyl value of 315mg / KOH, 10,760.5 parts by weight of antioxidant, 0.5 parts by weight of ultraviolet absorber UV328, organic neodecanoic acid 0.3 parts by weight of bismuth acid and organic zinc neodecanoate mixture;
[0037] The curing agent is composed of the following raw materials in parts by weight: 85 parts by weight of 4,4'-dicyclohexylmethane diisocyanate, 5 parts by weight of N,N,N',N'-tetra(2-hydroxypropyl)ethylenediamine parts by weight;
[0038] The preparation method of the environment-friendly high-hardness and high-transparency polyurethane resin described in Embodiment 1 comprises the following st...
Embodiment 2
[0043] An environmentally friendly high-hardness and high-transparency polyurethane resin, comprising the following raw materials in parts by weight: 75 parts by weight of a polymer and 100 parts by weight of a curing agent;
[0044] The polymer is composed of the following raw materials in parts by weight: 96.5 parts by weight of castor oil-modified polyester polyol with a hydroxyl value of 315mg / KOH, 10,760.6 parts by weight of antioxidant, 0.6 parts by weight of ultraviolet absorber UV328, organic neodecanoic acid 0.35 parts by weight of bismuth acid compound;
[0045] The curing agent is composed of the following raw materials in parts by weight: 88 parts by weight of 4,4'-dicyclohexylmethane diisocyanate, 88 parts by weight of N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine 8 parts by weight.
[0046] The preparation method of the environment-friendly high-hardness and high-transparency polyurethane resin described in embodiment 2 comprises the following steps:
[00...
Embodiment 3
[0051] An environmentally friendly high-hardness and high-transparency polyurethane resin, comprising the following raw materials in parts by weight: 80 parts by weight of a polymer and 100 parts by weight of a curing agent;
[0052] The polymer is composed of the following raw materials by weight: 97 parts by weight of castor oil-modified polyester polyol with a hydroxyl value of 315mg / KOH, 10,760.7 parts by weight of antioxidant, 0.7 parts by weight of ultraviolet absorber UV328, organic neodecanoic acid 0.4 parts by weight of zinc acid compound;
[0053] The curing agent is composed of the following raw materials in parts by weight: 90 parts by weight of 4,4'-dicyclohexylmethane diisocyanate, 10 parts by weight of N,N,N',N'-tetra(2-hydroxypropyl)ethylenediamine parts by weight.
[0054] The preparation method of the environment-friendly high-hardness and high-transparency polyurethane resin described in Embodiment 3 comprises the following steps:
[0055] (1) Preparation ...
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