Low-odor and low-VOC polyurethane foam and preparation method thereof

Abstract

The invention discloses low-odor and low-VOC (Volatile Organic Compound) polyurethane foam and a preparation method thereof. A mixed material A comprises the following components in parts by weight: 50-99 parts of polyether polyol, 1-50 parts of polymer polyether polyol, 0.1-1.5 parts of an amine catalyst, 0.1-2 parts of an aldehyde trapping agent, 0.1-1.5 parts of silicone oil, 0.1-9.5 parts of water and 0.1-1.5 parts of a foaming agent; the material B is isocyanate; and the mass ratio of the material A to the material B is 1: (1-1.8). The method is as follows: uniformly mixing the polyetherpolyol, the polymer polyether polyol, the amine catalyst, the silicone oil, the water and the foaming agent; then adding the aldehyde catching agent and uniformly mixing again; pouring into a mold after mixing and stirring; closing the mold and curing; and obtaining the finished product. The polyurethane foam disclosed by the invention has the advantages of low odor, odor grade not higher than grade 2 and low VOC (Volatile Organic Compound), the VOC of the foam is not greater than 30 mu g / g, the physical property of the finished product is excellent, and the problems of high VOC and odor of the polyurethane foam are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane foam, and relates to a low-odor, low-VOC polyurethane foam and a preparation method thereof. Background technique [0002] As consumers pay more and more attention to environmental protection, many polyether suppliers are trying to reduce the aldehyde content of polyether itself, and even develop self-catalyzed polyether to reduce the VOC, especially the aldehyde content of the final foam, but there is no Large-scale industrialized products. The currently implemented national standards and testing methods are all aimed at the restriction of environmentally harmful substances in passenger cars. The testing methods of major automobile manufacturers are not unified, and there is no unified testing method and standard in the industry for the raw material polyether; and In the production process of foam products, raw materials and additives such as isocyanate, catalyst, foam stabilizer, and blowi...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN 201810037318.5 relates to a low-VOC polyurethane foam and its preparation method, which mainly solves the problems of high VOC value, high content of benzene and aldehyde substances, and large odor existing in the prior art

[0005] The technology mentioned in the above patents has reduced the VOC content and odor of the product to a certain extent, but the actual polyurethane foam VOC and odor are still relatively high