Peculiar-smell-free high-adhesion polyurethane composition, and preparation method and equipment thereof

Abstract

The invention discloses a peculiar-smell-free high-adhesion polyurethane composition, and relates to the technical field of polyurethane preparation. The peculiar-smell-free high-adhesion polyurethanecomposition contains 100 parts of a polymer polyether polyol, 20-40 parts of a polyisocyanate, 2-5 parts of a cross-linking agent, 1-5 parts of a foaming agent, 1-2 parts of a catalyst, and 0.5-2 parts of an antifoaming agent with an average molecular weight of 800-1200. The invention also provides a preparation method and equipment thereof. By synchronously improving the material components, theprocess and the equipment, the problems of sufficient reaction among the materials, provision of adhesive property and elimination of peculiar smell are solved, the material strength is improved, andthe reaction is sufficient and thorough, so that the peculiar smell generated by insufficient reaction of the raw materials is eliminated. The problem of insolubility of high-molecular polyether andlow-molecular polyether is solved, multiple catalysts are selected, the catalytic activity difference of each catalyst is different, foaming and gel are balanced in the early-stage foaming stage, gelreaction is conducted in the later stage, materials can be cured and cross-linked within set time at low temperature, and the material strength is improved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane preparation, and in particular relates to a non-odor high-adhesive polyurethane composition, a preparation method and equipment. Background technique [0002] Polyurethane (referred to as PU) is a polymer made of polyisocyanate and polyether polyol or polyol or / and small molecule polyol, polyamine or water and other chain extenders or crosslinking agents. By changing the type and composition of raw materials, the shape and performance of the product can be greatly changed, and the final product can be obtained from soft to hard. The forms of polyurethane products include soft, semi-rigid and rigid foam plastics, elastomers (polyurethane elastomers mainly include thermoplastic TPU and thermosetting, and more CPUs are realized by casting process), paint coatings, adhesives, sealants, and synthetic leather coatings. Resin, elastic fiber, etc., are widely used in many fields such as automobile m...

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Problems solved by technology

[0007] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a non-odor type high-adhesion polyurethane composition, a preparation method and equipment, through synchronous improvement of material components, processes and equipment, to solve the problem of sufficient reaction between materials, providing adhesion At the same time, to solve the insolubility of high-molecular polyether and low-molecular polyether, a special emulsifier is added to the raw materials to ensure that the raw materials with different molecular weights will not break after mixing for a long time; by choosing multiple catalysts, each The catalytic activity is different. In the early stage of foaming, the foaming and gel should be balanced as much as possible. In the later stage, the reaction is mainly reflected in the gel, so that the material can be made in the set time at a lower temperature. Internal curing and cross-linking can improve the strength of the material and make it react fully and thoroughly, so as to eliminate the peculiar smell caused by the insufficient reaction of raw materials

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