Supercharge Your Innovation With Domain-Expert AI Agents!

Preparing method for polymer polybasic alcohol

A polyol and polymer technology, which is applied in the field of in-situ polymerization to prepare polymer polyols, can solve the problems of low monomer conversion rate, increased production process cost, monomer removal and large recycling load, etc.

Inactive Publication Date: 2005-02-23
中国石化集团天津石油化工公司
View PDF7 Cites 31 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polymer polyol monomers produced by the semi-continuous process have a high conversion rate, but the viscosity is relatively high, especially in the formula with high styrene and high solid content, the viscosity increases significantly, which affects the transportation and use of the product
The continuous process is suitable for the production of large-scale single-species polymer polyols, the product quality is stable, and the viscosity of the product obtained by the semi-continuous process is lower than that of the semi-continuous process at the same solid content, but the monomer conversion rate is relatively low, lower than 98wt%, so The monomer removal and recovery load is relatively large, which increases the production process cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Adopt method 1, add the polymer polyol of 120 grams 45wt% solid content to bottom material, this polymer polyol has not removed volatile substance and unreacted monomer, top material is basic polyether 3031K348 grams, macromolecular monomer 20.4 grams, 27.2 grams of isopropanol, 2.8 grams of azobisisobutyronitrile, 2.8 grams of n-dodecyl mercaptan, 199 grams of styrene, and 107 grams of acrylonitrile. Polymer polyol A was obtained.

Embodiment 2

[0039] Using method 2, in a 1000ml reactor, add 368 grams of basic polyether 3031K, 3.2 grams of n-dodecyl mercaptan, 40 grams of isopropanol, and 24 grams of macromonomers, and continuously add 3.6 grams of azobisisobutyronitrile gram, 234 grams of styrene, 126 grams of acrylonitrile, the mixed material liquid of basic polyether 3031K41 grams. Polymer polyol B is obtained.

Embodiment

[0041] Using method 3, add 200 grams of polymer polyol with a solid content of 30wt% in the first reaction kettle, and continuously drop the mixture, wherein the basic polyether 3031K47.4wt%, azobisisobutyronitrile 0.4wt%, macromolecule 2.8 wt% of monomer, 0.4 wt% of n-dodecyl mercaptan, 2.8 wt% of isopropanol, 30.0 wt% of styrene, and 16.2 wt% of acrylonitrile. The first 1000 g of the second reactor overflow product was collected for additional use, and the later collected product was used as Polymer Polyol C.

[0042] The quality indexes of polymer polyols A, B, and C are listed in Table 1.

[0043] Types of Polymer Polyols

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A polymer polyol is prepared in a half continuous operation with a basic polyether polyol as continuous phase, in action of high molecular polymer monomers, chain transfer reagent, radical triggers, by polymerizing in situ to form stable dispersed polymer polyol, which has features as below: certain solid contained polymer polyol as substrate material, mixing raw materials, then adding continuously. The polymer polyol in this process has high solid content while low viscosity, well dispersed stability, high monomers convert rate, and is more adapted for preparing soft polyurethane foams, compared with other preparing methods.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyether polyol, more specifically, the present invention relates to the method for preparing polymer polyol by in-situ polymerization of one or several vinyl monomers in polyether polyol. Background technique [0002] Polymer polyol is a bulk industrial product, which can endow polyurethane products with good load-bearing properties and improve the open cell of foam. It is mainly used in the production of block flexible foam, high resilience flexible foam and molded flexible foam of polyurethane. Polymer polyol is formed by in-situ polymerization of one or several vinyl monomers with polyether polyol as the continuous phase. [0003] Commercially useful polymer polyols were first developed by American Paul Stamberger, and began to apply for a number of patents in the 1960s. Subsequently, a variety of synthetic methods appeared, such as the synthesis of vinyl polymers alone, and then t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/46
Inventor 李玉松郑金云闫敏杨雨强
Owner 中国石化集团天津石油化工公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com