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

Plant oil polyether glycol used for preparing cyclopentane type polyurethane foam and preparation method thereof

A technology of polyether polyol and vegetable oil, applied in the field of polyether polyol, which can solve the problems of poor compatibility and achieve the effects of high fluidity, low water absorption and good foam toughness

Active Publication Date: 2008-02-20
江苏钟山新材料有限公司
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The blowing agent cyclopentane has no effect on the ozone layer, but its compatibility with the commonly used polyether polyols is poor

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

[0015] Embodiment 1: the preparation of modified vegetable oil

[0016] In a 1L pressure reactor, add 150g of rapeseed oil and 450g of soybean oil, then add 54g of formic acid and 12g of sulfuric acid, control the temperature within the range of 47°C to 53°C and start adding 300g of hydrogen peroxide dropwise, and finish adding within one hour . After separation, washing, and vacuum distillation, the product and ethylene glycol (amount ratio of 1.2:1) are put into a 1L pressure reactor at the same time, and then 0.1% catalyst (sulfuric acid activated clay) is added by the weight of the reactant. React at -200°C for 2 to 6 hours under strong stirring. During the reaction process, samples were taken at regular intervals, and the acid value and epoxy value of the samples were measured according to standard methods. When the epoxy value of the reaction product was analyzed to be less than 0.1%, the reaction was stopped. The unreacted substances were removed under reduced pressu...

Embodiment 2

[0019] Put 300g of modified vegetable oil (soybean oil and rapeseed oil 3:1), 145g of behenic alcohol, 55g of glycerin, and 2g of catalyst KOH into a 1L reactor, replace the reactor with nitrogen, vacuumize and dehydrate, and heat up to 110°C After vacuum stripping for 2 hours, add 500g of PO (propylene oxide), control the reaction temperature at 100-140°C, and the pressure at 0.1-0.6MPa. Diatomaceous earth adsorption, dehydration, gas, and filter with leaf filter to get the finished product.

[0020] Product indicators: Product appearance: colorless transparent liquid; hydroxyl value (mgKOH / g): 415; moisture: 0.05%; acid value (mgKOH / g): 0.05; ∑K + Na + ppm: 10; viscosity at 25°C, (cSt): 4500; density (gm / cc), at 25°C: 1.0208.

Embodiment 3

[0022] Put 240g of modified vegetable oil (soybean oil and rapeseed oil 2:1), 160g of behenic alcohol, 50g of sucrose, and 1.87g of catalyst KOH into a 1L reactor, and after replacing the reactor with nitrogen, vacuumize and dehydrate, and heat up to 110 After vacuum stripping for 2 hours at ℃, 450g of PO (propylene oxide) was introduced, the reaction temperature was controlled at 90-140℃, and the pressure was 0.1-0.6MPa. Adsorption, dehydration, degassing, and filtering with a leaf filter to obtain the finished product.

[0023] Product indicators: product appearance: colorless transparent liquid; hydroxyl value (mgKOH / g): 430; moisture: 0.05%; acid value (mgKOH / g): 0.05; ∑K + Na + ppm: 10; viscosity at 25°C, (cSt): 6500; density (gm / cc), at 25°C: 1.0218.

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
Hydroxyl valueaaaaaaaaaa
Hydroxyl valueaaaaaaaaaa
Hydroxyl valueaaaaaaaaaa
Login to View More

Abstract

The invention relates to a seed oil polyether glycol of high molecular weight. The seed oil polyether glycol is a copolymer, the chain ends of which are capped with modified seed oil and polyols propylene oxide, with 700 to 1200 molecular weight. The seed oil polyether glycol has very good compatibility with blowing catalyst pentamethylene, and polyurethane foam prepared by the seed oil polyether glycol of the invention displays relatively high fluidity, relatively good foam ductility, relatively low absorption rate and good adhesive property; meanwhile the reaction activity of the polyether glycol of the invention is improved which shortens the ageing time of foam. The invention discloses the preparation method thereof.

Description

technical field [0001] The invention relates to polyether polyols, in particular to vegetable oil polyether polyols for preparing cyclopentane type polyurethane foams and a preparation method thereof. Background technique [0002] Since the advent of rigid polyurethane (PU) foam, rigid polyurethane foam has the characteristics of high strength, light weight, good heat insulation effect, and convenient construction. It has been widely used in many fields for more than 40 years, and its uses are roughly divided into two categories. One type is used as thermal insulation materials, such as rigid foam plastics in refrigerators, freezers, sandwich panels and insulation pipes; the other type is non-thermal insulation structural materials, such as making furniture, sports equipment, electrical casings, etc. In addition, there are also products that combine the above two functions. The raw material of rigid polyurethane foam is liquid, which can fill the cavity or mold after reacti...

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
IPC IPC(8): C08G65/26C08G18/48
Inventor 赵华头陈玉娟秦敦忠
Owner 江苏钟山新材料有限公司