| abstract |
The invention relates to a polymer surface hardening agent and a preparation method thereof. The hardening agent is composed of a main agent and a curing agent. The quality of the curing agent is 2-8% of the main agent. It is formed by mixing the water-soluble polymer solution and 0.5-5% of its mass of inorganic filler. The water-soluble polymer solution contains water-soluble polyurethane-urea polymer and acetic acid. The water-soluble polyurethane-urea polymer has polyurethane chain segments and also has The polyurea segment, the two segments are cross-linked by a curing agent, and the polyurea segment has a non-polar aromatic diamine without hydroxyl groups. The advantage is that it has the comprehensive properties of polyurethane and polyurea, and the aromatic diamine without hydroxyl is introduced into the polyurea unit to improve the rigidity of the polyurea unit, thereby improving the strength of the polymer; PP and PVC films, etc. The composite film formed after treatment has scratch resistance, corrosion resistance and yellowing resistance; the hardener is a weak acid system, and there is no release of ammonia or aldehydes during curing and subsequent use, which is healthy and environmentally friendly. |