 High frequency ECL voltage controlled ring oscillator |
| OF THE INVENTION As shown in FIG. 4, the present invention provides an ECL gate configuration 100 ... |
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| Local area network amplifier for twisted pair lines |
| An amplifier for amplifying a signal transmitted over a line, where the line attenuates higher ... |
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| Sequential beam switching of acousto-optic modulator |
| It is a novel feature of the present invention that simultaneous multiple-beam operation of a laser ... |
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| Flux-cored wire |
| It is an object of the present invention to provide a flux-cored wire useful for electrogas arc ... |
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| Multistage rotary switch |
| Each of the switch wafers includes a case member 1 with a disk-shaped recess for receiving a ... |
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| Tank type gas circuit breaker |
| An object of the invention is to provide a tank type gas circuit breaker for a three-phase ... |
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| Solar air heater |
| According to the present invention there is provided a solar collector air heater which exhibits a ... |
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| Infrared space heater |
| What is claimed is: 1. A space heater comprising a base providing a plenum chamber for fresh air, a ... |
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| Metallized glass-ceramic cooking vessels exhibiting extended service life |
| Glass-ceramic cooking vessels which can be used to provide aluminum-coated vessels with long ... |
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Dense, elegant and pliable sheet material comprising fibrous base impregnated with a diol-hindered amine polyurethane system
| Details |
Inventors: Tanaka, Minoru; Yagi, Kenkichi;
Assignee: Toray Industries, Inc. (Tokyo, JP)
Primary Examiner: Cannon; James C.
Assistant Examiner:
Attorney, Agent or Firm: Miller; Austin R.
A composite sheet material comprising a fibrous sheet which is impregnated and/or coated with a polyurethane elastomer, wherein said polyurethane elastomer comprises the reaction product of (A) a polymeric diol having a molecular weight of about 800-5000. (B) an organic polyisocyanate, and (C) a chain extender comprising a low molecular weight organic diol, and if desired, (D) a chain terminator; wherein more than 2 mol % of (C) and/or (D) comprise a hindered amine compound having the formula I ##STR1## wherein R.sup.1 is a substituent selected from the group consisting of hydrogen, oxygen, alkenyl, alkynyl, alkyl, aralkyl, acyl, --(R.sup.5 O).sub.n H and --(COR.sup.6 CO.sub.2 R.sup.7 O).sub.m --H, wherein R.sup.5 is an alkylene group, R.sup.6 is a residue of an organic dicarboxylic acid and R.sup.7 is a residue of an organic diol, n is an integer from 1 to 50 and m is an integer from 1 to 15; R.sup.2 is a substituent selected from the group consisting of hydrogen, an alkyl, alkenyl, alkynyl, aralkyl, aryl and cyano. X is a substituent selected from the group consisting of hydroxyl, amino and monoalkylamino, and said substituents whose part or all of hydrogen atoms bonded to oxygen and/or nitrogen may be substituted by --(R.sup.5 O).sub.n --H and/or --(COR.sup.6 CO.sub.2 R.sup.7 O).sub.m --H, and wherein R.sup.3 and R.sup.4 are the same or different alkyl groups, R.sup.3 and R.sup.4 being independent or bonded to form an alicyclic ring. Said composite sheet material is useful as a synthetic leather, especially as a suede-like leather. It has a dense and elaborate structure, as well as a good flexibility and pliability. Furthermore, it has superior initial properties and superior abrasion resistance after being worn for a long time. |
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DETAILED DESCRIPTION We claim: 1.
A composite sheet material comprising a fibrous sheet which is impregnated and/or coated with a polyurethane elastomer wherein said polyurethane elastomer comprises the reaction product of (A) a polymeric diol having a molecular weight of about 800-5000, (B) an organic polyisocyanate, and (C) a chain extender comprising a low molecular weight organic diol, more than 2 mol % of which comprises a hindered amine compound of the formula (I) ##STR3## wherein R.
sup.
1 is a substituent selected from the group consisting of hydrogen, oxygen, an alkyl group containing 1-12 carbon atoms, an alkenyl group containing 2-12 carbon atoms, an alkynyl group containing 2-12 carbon atoms, an aralkyl group containing 7-18 carbon atoms, an acyl group containing 1-12 carbon atoms, --(R.
sup.
5 O).
sub.
n H and --(COR.
sup.
6 CO.
sub.
2 R.
sup.
7 O).
sub.
m --H, wherein R.
sup.
5 is an alkylene group containing 1-12 carbon atoms, R.
sup.
6 is a residue of an organic dicarboxylic acid containing 2-18 carbon atoms, R.
sup.
7 is a residue of an organic diol containing 2-12 carbon atoms, n is an integer from 1 to 50 and m is an integer from 1 to 15; R.
sup.
2 is a substituent selected from the group consisting of hydrogen, an alkyl group containing 1-12 carbon atoms, an aralkyl group containing 7-18 carbon atoms, an alkenyl group containing 2-12 carbon atoms, an alkynyl group containing 2-12 carbon atoms, an aryl group containing 6-18 carbon atoms, and a cyano group; X is a substituent selected from the group consisting of a hydroxyl group, an amino group and a monoalkylamino group containing 1-12 carbon atoms, and said substituents whose part of or all of hydrogen bonded to oxygen and/or nitrogen may be substituted by --(R.
sup.
5 O).
sub.
n --H and/or --(COR.
sup.
6 CO.
sub.
2 --R.
sup.
7 O).
sub.
m --H, and wherein R.
sup.
3 and R.
sup.
4 are the same or different alkyl groups containing 1-12 carbon atoms, R.
sup.
3 and R.
sup.
4 being independent or bonded to form a 5-12-membered alicyclic ring.
2.
The sheet material defined in claim 1, which is also the reaction product of (D) a chain terminator having one active hydrogen atom, wherein more than 2 mol % of (C) and/or (D) comprise a hindered amine compound having the formula (I)
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Heat Accumulators 
