Difficult-flammble polymer polyether glycol with high solid content and low viscosity as well as preparation method and application thereof

Abstract

The invention discloses a method for preparing difficult-flammble polymer polyether glycol with high solid content and low viscosity. The method comprises the following steps of: firstly carrying out polycondensation on tripolycyanamide, cyanoguanidine, formaldehyde and polyether glycol with high activity by using a two-step process; then adding urea and formaldehyde into the mixture to condense at 40-160 DEG C for 5-16 hours to obtain the difficult-flammble polymer polyether glycol (MPP) with the particle diameter of 10-200nm, the solid content of 40-45 percent and the viscosity of lower than 5000mPa.s / 25 DEG C. The MPP has the characteristics of difficult flammability, low fuming, opening property and hardening property, and replace fire retardant and common polymer polyether glycol in a high-bounce foaming plastic moulding formula. Because of high solid content, the use level of MPP and the production cost can be reduced under the condition of requiring common hardness. The invention also discloses a polyurethane foaming plastic with difficult flammability, low smoke and high bounce, which is synthesized by taking the MPP used as the raw material; the difficult-flammble degree of the polyurethane foaming plastic is high, and the oxygen index is up to 33 percent.

Description

technical field [0001] The invention belongs to the field of polyurethane synthetic materials, in particular to a high-solid-content, low-viscosity flame-retardant polymer polyether polyol, a preparation method and application thereof. Background technique [0002] Where the main chain of the polymer molecule is composed of an ether chain (-R-O-R'-), the resin whose molecular end group or side group contains hydroxyl group (-OH) is called polyether polyol. It is generally composed of alkylene oxide, ethylene oxide, propylene oxide, tetraoxyfuran and other compounds, with polyols as initiators, and the resins synthesized by ring-opening homopolymerization and copolymerization are all such products. Polyether polyols used in polyurethane foam, etc. are classified according to molecular composition and structure, and mainly include the following four types; [0003] 1. Propylene oxide homopolyether, propylene oxide monomer is reacted with various polyols (such as propylene gly...

AI Technical Summary

Problems solved by technology

[0012] But, the disclosed nanoscale flame retardant polymer polyether polyol of Chinese patent CN01134144.0, its solid content is about 28%, relatively on the low side, is the flame retardant polyurethane high resilience foam molding (HRF) of raw material synthesis with it ) The hardness of the product is also relatively low

If the solid content is increased, the viscosity of MPP will be too large and the fluidity will be poor, which is extremely unfavorable to the subsequent foaming process and will greatly reduce the quality of HRF products.

To improve the hardness of HRF products, it is bound to increase the amount of MPP, resulting in increased production costs

Moreover, the specific high-hardness HRF products that cannot be synthesized with existing MPP cannot meet the high requirements for the hardness of HRF products in some fields, such as automobile engine compartment sound insulation pads, sports car seats, etc.