One-component polyurethane foam caulking agent

Abstract

The invention discloses a one-component polyurethane foam caulking agent, which comprises the following components in parts by weight: 30.0-60.0 parts of polyether polyol, 2.0-6.0 parts of catalysts,1.0-4.0 parts of curing agents, 2.0-6.0 parts of plasticizers and 20.0-40.0 parts of solvents. The one-component polyurethane foam caulking agent has good flexibility and tensile strength, uniform foam holes, and can be used in a low-temperature environment; a DMDEE catalyst is contained inside the agent, and has soft activity and good storage stability, and thus the surface drying rate, curing rate and foaming rate of OCF can be effectively promoted; a CP52 plasticizer is contained inside the agent, and has good compatibility, and thus the viscosity and brittleness of the OCF is reduced, andthe flexibility is increased; and a ketoimine curing agent is added inside the agent, and thus the viscosity of the OCF can be reduced, the agent can be quickly wet cured, and the tensile strength isimproved.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a one-component polyurethane foam caulking agent. Background technique [0002] One-component polyurethane foam sealant is a special polyurethane product that packs and stores polyurethane prepolymer, catalyst, foaming agent, propellant and other components in the form of a single aerosol can. It has pre-foaming, high-expansion , small shrinkage, etc., and the foam has good strength and high adhesion. The cured foam has various effects such as caulking, bonding, sealing, heat insulation, and sound absorption. It is an environmentally friendly, energy-saving, and easy-to-use building material. It is suitable for sealing and plugging, filling gaps, fixing and bonding, heat preservation and sound insulation, especially for sealing and waterproofing between plastic steel or aluminum alloy doors, windows and walls; [0003] In the prior art: the patent application publication number...

AI Technical Summary

Problems solved by technology

[0003] In the prior art: the patent application publication number CN 107880239 A discloses a one-component polyurethane foam caulking agent, including the following raw materials in mass fractions: polyether polyol 10-15%, modified polyether polyol 5% -10%, flame retardant 40-50%, catalyst 1-2%, foam stabilizer 6-10%, polymethylene polyphenylisosine ester 15-25%, dimethyl ether 2-5%, Propellant 3-5%, said polyether polyol includes: polyether polyol A, viscosity is 40-80mPa.s, hydroxyl value is 260-300mgKOH / g, and polyether polyol B, viscosity is 220-300mPa .s, the hydroxyl value is 160-170mg KOH / g, it cannot be used in a lower temperature environment, the use range is narrow, the flexibility is poor, the tensile strength is poor, the cells are not uniform enough, and it cannot meet the use requirements