EP 0643733 A4 19960403 - HARD THERMOPLASTIC POLYURETHANE ELASTOMERS.
Title (en)
HARD THERMOPLASTIC POLYURETHANE ELASTOMERS.
Title (de)
HARTE THERMOPLASTISCHE POLYURETHANELASTOMERE.
Title (fr)
ELASTOMERES THERMOPLASTIQUES DURS EN POLYURETHANE.
Publication
Application
Priority
- US 9304785 W 19930520
- US 89414892 A 19920604
Abstract (en)
[origin: WO9324549A1] This invention relates to a method of fabricating a thermoplastic elastomer which comprises the steps of: (a) fabricating a polyol blend having a desired polydispersity and comprising a first polyol and a second polyol, a diisocyanate, and a difunctional, isocyanato-reactive chain-extender, the first polyol being prepared utilizing a double metal cyanide complex catalyst and having a molecular weight of between about 1,000 and about 5,000, said first polyol having an end group unsaturation level of no greater than 0.04 milliequivalents per gram of polyol, the second polyol being a polyether polyol having an average molecular weight of between about 1,000 and about 20,000, (b) reacting said polyol blend with a diisocyanate to produce an isocyanate-terminated prepolymer, and (c) reacting said isocyanate-terminated prepolymer with a difunctional isocyanato-reactive chain extender in a mold or in an extruder in order to produce a hard elastomer characterized by a hardness of between a 75 Shore A and about a 75 Shore D. Also claimed is the elastomer produced by the above method utilizing a one-shot technique.
IPC 1-7
IPC 8 full level
C08G 18/12 (2006.01); C08G 18/48 (2006.01); C08G 18/65 (2006.01); C08G 18/66 (2006.01); C08G 65/26 (2006.01); C08G 65/333 (2006.01); C08L 71/02 (2006.01)
CPC (source: EP KR)
C08G 18/10 (2013.01 - KR); C08G 18/12 (2013.01 - EP); C08G 18/48 (2013.01 - KR); C08G 18/4804 (2013.01 - EP); C08G 18/4866 (2013.01 - EP); C08G 18/6674 (2013.01 - EP); C08G 65/2663 (2013.01 - EP); C08G 65/33348 (2013.01 - EP); C08L 71/02 (2013.01 - EP)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9324549A1
Designated contracting state (EPC)
BE DE ES FR GB IT NL
DOCDB simple family (publication)
WO 9324549 A1 19931209; AU 4384193 A 19931230; CA 2135293 A1 19931209; EP 0643733 A1 19950322; EP 0643733 A4 19960403; JP 3326176 B2 20020917; JP H07507344 A 19950810; KR 100259667 B1 20000615; KR 950701943 A 19950517
DOCDB simple family (application)
US 9304785 W 19930520; AU 4384193 A 19930520; CA 2135293 A 19930520; EP 93914018 A 19930520; JP 50062594 A 19930520; KR 19940704403 A 19941203