A kind of environment-friendly high-hardness and high-transparency polyurethane resin and preparation method thereof

Abstract

The invention discloses an environment-friendly high-hardness and high-transparency polyurethane resin, which comprises the following raw materials in parts by weight: 65-100 parts by weight of a polymer and 100 parts by weight of a curing agent; the polymer is composed of the following parts by weight of raw materials: 96-98 parts by weight of grease polyol, 0.5-1 parts by weight of antioxidant, 0.5-1 parts by weight of ultraviolet absorber, 0.3-0.5 parts by weight of catalyst; the curing agent is composed of the following raw materials by weight: isocyanate 85-95 parts by weight, 5-15 parts by weight of organic amine; the beneficial effects of the present invention are: the environment-friendly high-hardness and high-transparency polyurethane resin of the present invention is made up of two parts, a polymer and a curing agent, and the raw materials used are environmentally friendly raw materials, which will not Harmful to the environment and the human body, without carcinogens; the environmentally friendly high-hardness and high-transparency polyurethane resin described in the present invention has high strength and toughness, and has the characteristics of high temperature resistance and low linear shrinkage rate. The products made of it Has excellent yellowing resistance and transparency.

Description

technical field [0001] The invention relates to a polyurethane resin, in particular to an environment-friendly high-hardness and high-transparency polyurethane resin and a preparation method thereof. Background technique [0002] Existing transparent art and art ornament resins are made of epoxy resin, unsaturated polyester resin and industrial rigid transparent polyurethane, and these resins have some disadvantages more or less. [0003] For example: epoxy resin has high hardness and brittle texture, and it is easy to turn yellow when exposed to sunlight for a long time. The linear shrinkage rate of unsaturated resin polyester is large, and the cured material is brittle and has poor toughness. It is also easy to yellow when exposed to the natural environment for a long time. Although industrial rigid transparent polyurethane is superior to epoxy resins and unsaturated resins in terms of resistance to yellowing caused by ultraviolet radiation, it has defects in meeting heat ...

AI Technical Summary

Problems solved by technology

[0003] For example: epoxy resin has high hardness and brittle texture, and it is easy to turn yellow when exposed to sunlight for a long time. Unsaturated resin polyester has a large linear shrinkage rate, the cured material is brittle, poor toughness, and it is easy to yellow when exposed to the natural environment for a long time. Although industrial rigid transparent polyurethane is superior to epoxy resin and unsaturated resin in terms of resistance to yellowing caused by ultraviolet radiation, it has defects in meeting heat resistance and impact resistance at the same time; in addition, some rigid transparent polyurethane material curing systems Contains carcinogens and does not meet environmental protection requirements

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