Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing polyurethane prepolymer and trihydroxy copolyether intermediate

A polyurethane prepolymer, intermediate technology, applied in chemical instruments and methods, layered products, transportation and packaging, etc., can solve problems such as unreachable

Inactive Publication Date: 2013-01-09
上腾新材料科技(苏州)有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent No. 5,461,122 discloses an improved manufacturing method of waterproof and moisture-permeable polyurethane, which is to react the isocyanate monomer containing two functional groups not only with polyethylene glycol, but also add a non-hydrophilic intermediate mixture containing dihydroxyl groups such as silicone And polytetramethyl ether glycol and polypropylene oxide and or some special polyesters and polybutadiene or polyisobutylene reaction, so that the washing resistance, adhesion and water pressure resistance can be improved, but the moisture permeability is still sacrificed , this type of polyurethane single membrane still cannot meet the requirements of high water pressure and high moisture permeability membrane

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

[0024] This example provides a preparation method of a copolyether intermediate (POEO-5000) of trihydroxypropylene oxide and ethylene oxide. The freshly made ring-opening catalyst of the ring (the chemical structure of the ring-opening catalyst is Zn 3 [Fe(CN) 6 ] 2 * 2.5C 4 H 8 O 2 * 2.5H 2 O where C 4 H 8 O 2 Refers to dioxane, the preparation method of the catalyst can be found in US Patent US 3941849, which will not be described in detail here) and a trifunctional monomer (the monomer is an adduct of tripropylene oxide and glycerin, with a number average molecular weight of 260, It is the product of Dow Chemical Company CP-260 in the United States). After the reactor is sealed, the oxygen is first exhausted with nitrogen, and then propylene oxide is introduced. The reaction temperature is controlled at about 45°C, and the reaction is about 24 hours. The ring-opening polymerization of propylene oxide A polyether intermediate wit...

Embodiment 2

[0026] This example provides a preparation method of a copolyether intermediate (POEO-3000) of trihydroxypropylene oxide and ethylene oxide. The freshly made ring-opening catalyst of the ring (the chemical structure of the ring-opening catalyst is Zn 3 [Co(CN) 6 ] 2 * 2.5C 4 H 8 O 2 * 2.5H 2 O where C 4 H 8 O 2 Refers to dioxane, the preparation method of the catalyst can be found in US Patent US 3941849, which will not be described in detail here) and a trifunctional monomer (the monomer is an adduct of tripropylene oxide and glycerin, with a number average molecular weight of 260, It is the product of Dow Chemical Company CP-260 in the United States). After the reactor is sealed, the oxygen is first exhausted with nitrogen, and then propylene oxide is introduced. The reaction temperature is controlled at about 45°C, and the reaction is about 24 hours. The ring-opening polymerization of propylene oxide A polyether intermediate with...

Embodiment 3

[0028] This example provides a preparation method of a copolyether intermediate (POEO-7500) of trihydroxypropylene oxide and ethylene oxide. Freshly prepared ring-opening catalyst (same as in Example 1) and trifunctional monomer CP-260. After the reactor is sealed, oxygen is first exhausted with nitrogen, and then propylene oxide is introduced. The reaction temperature is controlled at about 45°C. After about 24 hours of reaction, the ring-opening polymerization of propylene oxide produces a polyether intermediate with a number-average molecular weight of about 2500, and the amount of the catalyst accounts for about 0.3% of the weight of the product. Next, add ethylene oxide to the above-mentioned reaction kettle, and the reaction temperature is also controlled at about 45°C, and react for about 24 hours to obtain a copolyether intermediate of trihydroxypropylene oxide and ethylene oxide, with a number average molecular weight of about 7500 . The molecular weight and compos...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
water resistanceaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing a polyurethane prepolymer, which is prepared by reacting copolyether intermediate, serving as a base, formed by copolymerizing special oxene and propylene oxide with trihydroxy groups with isocyanate with double functional groups or multiple functional groups; novel superior polyurethane with high water-proof property and high moisture permeability can be obtained by adding a chain extender into the prepolymer for reaction and can be made into a water-proof and moisture-permeable thin film; and the thin film can be compounded with a fabric to make a clothing fabric with high water pressure resistance and high moisture permeability.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane prepolymer with high water pressure resistance and high moisture permeability, and also relates to a trihydroxy copolyether intermediate used for preparing polyurethane with high water pressure resistance and high moisture permeability. Background technique [0002] Polyurethane was invented as a highly elastic rubber during World War II, and was later used as a waterproof material, such as coating on clothing fabrics to prevent wind and rain, but generally this kind of polyurethane is impermeable to moisture and is very stuffy to wear , and hot and humid, very uncomfortable. The creation of waterproof and moisture-permeable polyurethane materials can be traced back to the waterproof and moisture-permeable film clothing fabric first promoted by Gore in the 1980s. In 1984, Gore’s patent US 4532316 first proposed the production of waterproof and moisture-permeable polyurethane. The concept ...

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 Patents(China)
IPC IPC(8): C08G18/48C08G18/10C08G65/26C08G65/28B01F17/42C08L75/08D06M15/568B32B27/08B32B27/12B32B27/40C09K23/42
Inventor WU HUISHENGGU JIANRONGYANG YINGZHANG YI
Owner 上腾新材料科技(苏州)有限公司