Polyurethane composition and molded article thereof

a technology of polyurethane and composition, which is applied in the field of polyurethane composition and molded article thereof, can solve the problems of poor workability of compositions containing such plasticizers and endocrine-disrupting chemicals

Inactive Publication Date: 2009-11-12
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The composition achieves excellent workability and plasticization without the suspicions of containing endocrine-disrupting chemicals, offering a safer alternative to phthalic ester-based polyurethane compositions.

Problems solved by technology

However, with regard to the phthalic esters used as a conventional plasticizer, there are suspicions that they are endocrine-disrupting chemicals, and it is required to place them under stringent control as first-category specified chemical materials under Pollutant Release and Transfer Register Law (PRTR Raw).
However, the compositions containing such plasticizers are poor in workability after prepared.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0051]100 Parts by weight of a hydroxyl-group-terminated liquid polybutadiene having an average molecular weight of 2,800 and a hydroxyl value of 46.6 (mg-KOH / g) (trade name: Poly-bd R-45HT, supplied by Idemitsu Kosan Co., Ltd.) was dehydrated, and then 12.6 parts by weight of liquid modified MDI (MDI: 4,4′-diphenylmethane diisocyanate) (trade name: Millionate MTL, supplied by Nippon Polyurethane Industry Co., Ltd.) (NCO / OH equivalent weight ratio=1.05), 50 parts by weight of 1-tetradecene (trade name: Linealene 14, supplied by Idemitsu Kosan Co., Ltd.) as a plasticizer and 0.05 part by weight of a curing catalyst (dibutyl tin dilaurate (DBTDL)) were mixed therewith, to prepare a composition. The composition was pressed with a hot press machine at 120° C. for 1 hour and then cured at 70° C. for 15 hours to give a polyurethane cured product.

examples 2-6

[0052]A cured product was obtained in the same manner as in Example 1 except that the plasticizer was replaced with 1-hexadecene (trade name: Linealene 16, supplied by Idemitsu Kosan Co., Ltd.) in Example 2, with a dimer of 1-hexene (trade name: Alkylene 12, supplied by Idemitsu Kosan Co., Ltd., purity of 95% or more) in Example 3, with a dimer of 1-decene (trade name: Alkylene 20, supplied by Idemitsu Kosan Co., Ltd., purity of 95% or more) in Example 4, with a trimer of 1-decene (trade name: Alkylene 30, supplied by Idemitsu Kosan Co., Ltd., purity of 90 wt % or more) in Example 5, or with a tetramer of 1-decene (trade name: Alkylene 40, supplied by Idemitsu Kosan Co., Ltd., purity of 90 wt % or more) in Example 6.

example 7

[0058]100 Parts by weight of polypropylene glycol having a molecular weight of 3,000 (trade name: Adeka Polyether G-3000, supplied by Asahi Denka Kogyo K.K.) was dehydrated, and then 15.5 parts by weight of a liquid modified MDI (NCO / OH equivalent weight ratio=1.05), 50 parts by weight of Linealene 14 as a plasticizer and 0.05 part by weight of a curing catalyst (DBTDL) were mixed therewith to prepare a composition. The composition was cured at 70° C. for 24 hours to give a polyurethane cured product.

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Abstract

A polyurethane composition containing a urethane compound prepared by reacting 100 parts by weight of a polyol with a polyisocyanate such that the NCO / OH equivalent weight ratio is greater than 0.5 but less than 15, and an epoxidation product of a dimmer of a linear olefin compound having 6 to 30 carbon atoms, wherein the content of the compound (B) per 100 parts by weight of the polyol is greater than 5 parts by weight but less than 400 parts by weight.

Description

[0001]This application is a continuation of U.S. Ser. No. 10 / 590,030 filed Dec. 28, 2006, which is a 371 of PCT / JP05 / 01920 filed Feb. 9, 2005, which claims priority to Japan 2004-043973, filed Feb. 20, 2004, and Japan 2004-181161, filed Jun. 18, 2004.FIELD OF THE INVENTION[0002]The present invention relates to a polyurethane composition and a molded article thereof.TECHNICAL BACKGROUND[0003]Polyurethane compositions can be diversely adjusted in chemical and physical properties by combining, as required, a polyol, a polyisocyanate, a plasticizer and another additive. They are used in various fields of soft to hard products such as an adhesive, a coating composition, a fiber, a foam, a leather, a molded article, and the like. For polyurethane compositions, phthalic esters have been used as a cheap plasticizer for a long time.[0004]However, with regard to the phthalic esters used as a conventional plasticizer, there are suspicions that they are endocrine-disrupting chemicals, and it is...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): C08K5/1515C08K5/01C08L75/04
CPCC08L75/04
InventorSUZUKI, SHINTAROFUKUNAGA, YUICHISATO, HARUHITO
OwnerIDEMITSU KOSAN CO LTD