Title:
【発明の名称】吹込フィルム用法のための軟質熱可塑性ポリウレタン
Document Type and Number:
Japanese Patent JP2980913
Kind Code:
B2
Abstract:
Soft linear thermoplastic polyurethanes, which have low permanent set, high tear propagation resistance, and low blocking, and which are extrudable by blown film techniques, are prepared by reacting one mole of a hydroxyl terminated polyester having a molecular weight from about 1800 to about 3600, from about 0.5 to about 2.0 moles of an aromatic glycol chain extender, and an organic diioscyanate in molar quantities substantially equal to the sum of the molar quantities of polyester and chain extender. The polyester is a mixed polyester prepared by reacting at least two different alaphatic glycols with one or more organic dicarboxcylic acids or at least one aliphatic glycol with two or more organic dicarboxcylic acids. The aliphatic glycol may have from 2 to about 10 carbon atoms. The organic dicarboxcylic acid may be either aliphatic or aromatic and may have from 2 to about 12 carbon atoms. The preferred chain extender is hydroquinone bis(beta-hydroxyethyl)ether. Polymers of this invention are useful as elastic tapes, and in particular as leg bands in diapers and adult incontinence garments. They may be used for other items of form-fitting apparel, such as ladies swim suits.
Inventors:
DEIRU RITSUCHII HOORU
DENISU JEEMUSU KERAA
DENISU JEEMUSU KERAA
Application Number:
JP21536188A
Publication Date:
November 22, 1999
Filing Date:
August 31, 1988
Export Citation:
Assignee:
BII EFU GUTSUDORITSUCHI CO ZA
International Classes:
C08G18/42; C08G18/65; C08G18/66; C08J5/18; C08K3/34; C08K3/36; C08K5/01; C08L75/06; (IPC1-7): C08G18/65; C08G18/42; C08K3/34; C08K5/01; C08L75/06
Domestic Patent References:
| JP5026597B1 | ||||
| JP4948333B1 |
Attorney, Agent or Firm:
Aoki Akira (2 outside)