Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Granular polyurethane resin composition and molded article of the same

a technology of granular polyurethane resin and composition, which is applied in the direction of transportation and packaging, vehicle components, coatings, etc., can solve the problems of great dimensional change, and achieve the effects of good production efficiency, excellent fusibility during slush molding, and excellent texture (feel)

Inactive Publication Date: 2010-09-09
MITSUI CHEM INC
View PDF19 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0016]With the granular polyurethane resin composition of the present invention, a molded article having excellent fusibility during slush molding and releasability from the mold after the molding, and having excellent texture (feel), design, and long-term heat resistance can be produced by slush molding with good production efficiency. Therefore, the molded article of the present invention is excellent in texture (feel), design, and long-term heat resistance. Accordingly, the granular polyurethane resin composition and the molded article thereof according to the present invention are useful in various fields involving slush molding, for example, automobile interior trim articles.

Problems solved by technology

However, a plasticizer having a temperature below the freezing point can impair the feel of the molded article, and a skin shrinkage occurs due to time-elapsing escape of the plasticizer, resulting in a greater dimensional change.

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

preparation example 1 (

Preparation Method of 1,4-bis(isocyanatomethyl)cyclohexane)

[0111]As a raw material, 1,4-bis(aminomethyl)cyclohexane (manufactured by Mitsubishi Gas Chemical Company, Inc.) having a trans / cis ratio of 93 / 7 determined by 13C-NMR was used to perform cold / hot two-stage phosgenation method under normal pressure.

[0112]Specifically, a stirring rod, a thermometer, a phosgene inlet tube, a dropping funnel, and a condenser tube were attached to a flask, and the flask was charged with 400 parts by mass of ortho dichlorobenzene. While the flask was cooled with cold water, the temperature in the flask was lowered to 10° C. or below, and 280 parts by mass of phosgene was introduced thereinto from the phosgene inlet tube. The dropping funnel was charged with a mixed solution of 100 parts by mass of 1,4-bis(aminomethyl)cyclohexane and 500 parts by mass of ortho dichlorobenzene, and the mixed solution was added into the flask over 30 minutes. During this time, the temperature in the flask was mainta...

preparation example 2 (

Preparation Method of Dispersion Stabilizer (I))

[0117]A three-neck flask equipped with a stirrer was charged with 2000 parts by mass of adipate polyester polyol (manufactured by MITSUI CHEMICALS POLYURETHANES, INC., trade name: U-2610) and 98 parts by mass of maleic anhydride. The mixture was then gradually heated under a nitrogen flow and was thereafter stirred at 150° C. for 20 hours. Further, the mixture was gradually heated to 170° C. under a reduced pressure of 2.66 kPa with nitrogen bubbling, and stirred at that temperature for 5 hours, to obtain an unsaturated bond-containing polyol.

[0118]After the temperature was increased to 70° C. under a nitrogen atmosphere, 200 parts by mass of ethyl isocyanate was gradually added dropwise to 1300 parts by mass of the unsaturated bond-containing polyol. The mixture was then allowed to react at a temperature of 75 to 80° C. for 6 hours to synthesize an unsaturated bond-containing compound having a urethane bond at the end of the molecule....

preparation example 3 (

Preparation Method of Vinyl Monomer-Modified Polyol A)

[0121]A reactor equipped with a stirrer, a dropping apparatus, and a condenser was charged with 315.5 parts by mass of adipate polyester polyol (manufactured by MITSUI CHEMICALS POLYURETHANES, INC., trade name: Takelac U-2024) having a number average molecular weight of 2000, which was preliminarily subjected to reduced pressure dehydration treatment, and the mixture was heated to 117° C. with stirring under a nitrogen atmosphere.

[0122]Subsequently, a monomer solution obtained by preliminarily mixing 63.11 parts by mass of n-butyl methacrylate (manufactured by Wako Pure Chemicals Industries, Ltd.) and 21.5 parts by mass of PERHEXA C (S) (manufactured by NOF Corporation, organic peroxide obtained by diluting 1,1-di(t-butylperoxy)cyclohexane with a hydrocarbon-based solvent so as to have a purity of 70%) under a nitrogen atmosphere was added dropwise at a temperature of 117 to 121° C. to the reactor maintaining at the above-mention...

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
flow start temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

Disclosed is a granular polyurethane resin composition containing a thermoplastic polyurethane resin which contains a hard segment obtained by a reaction between a polyisocyanate and a chain extender. The polyisocyanate contains isocyanate groups of 1,4-bis(isocyanatomethyl)cyclohexane in an amount of not less than 50% by more relative to the total mole number of isocyanate groups.

Description

TECHNICAL FIELD[0001]The present invention relates to a granular polyurethane resin composition and a molded article thereof. More particularly, the present invention relates to a granular polyurethane resin composition suitable for slush molding, and a molded article formed from the granular polyurethane resin composition.BACKGROUND ART[0002]Slush molding can easily form complex-shaped products, provide uniform thickness, and achieve a good material yield, so that slush molding is widely used for forming of automobile interior trim articles or the like.[0003]Soft polyvinyl chloride-based powders have been used for slush molding materials for years. However, a plasticizer having a temperature below the freezing point can impair the feel of the molded article, and a skin shrinkage occurs due to time-elapsing escape of the plasticizer, resulting in a greater dimensional change. For this reason, the use of polyurethane resin-based powders in place of the soft polyvinyl chloride-based p...

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(United States)
IPC IPC(8): C08G18/00
CPCB29C41/18B29K2075/00B60R13/02C08G18/10C08G18/71C08G18/722C08G18/753C08G18/758C08G2140/00C08G18/757C08G18/2825C08G18/3206
Inventor NISHIGUCHI, DAISUKEOOTSUKI, KEIYAMASAKI, SATOSHI
Owner MITSUI CHEM INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com