JPS57200416A - Production of isocyanate-terminated liquid urethane prepolymer with good heat resistance - Google Patents
Production of isocyanate-terminated liquid urethane prepolymer with good heat resistanceInfo
- Publication number
- JPS57200416A JPS57200416A JP56085677A JP8567781A JPS57200416A JP S57200416 A JPS57200416 A JP S57200416A JP 56085677 A JP56085677 A JP 56085677A JP 8567781 A JP8567781 A JP 8567781A JP S57200416 A JPS57200416 A JP S57200416A
- Authority
- JP
- Japan
- Prior art keywords
- urethane prepolymer
- isocyanate
- hydroxyl groups
- diol
- production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
PURPOSE: To obtain a nontoxic, nonyellowing urethane prepolymer having excellent heat stability, by reacting an alkylenediol or polypropylene glycol with an excess of an aliphatic diisocyanate.
CONSTITUTION: In reacting an excess of an aliphatic diisocyanate with a diol at a diisocyanate/diol molar ratio ≥4, said reaction is carried out under heating by using, as said diol, a mixture of at least one member selected from (A) an alkylenediol having two prim. hydroxyl groups and a branch in the main chain extending between the two hydroxyl groups and (B) polyethylene glycol, MW ≥190, or polypropylene glycol having both terminals to which prim. hydroxyl groups are introduced by use of ethylene oxide or the like. The resulting reaction mixture is stripped of excessive diisocyanate, etc., and further purified by heat-treatment.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56085677A JPS57200416A (en) | 1981-06-05 | 1981-06-05 | Production of isocyanate-terminated liquid urethane prepolymer with good heat resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56085677A JPS57200416A (en) | 1981-06-05 | 1981-06-05 | Production of isocyanate-terminated liquid urethane prepolymer with good heat resistance |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57200416A true JPS57200416A (en) | 1982-12-08 |
Family
ID=13865458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56085677A Pending JPS57200416A (en) | 1981-06-05 | 1981-06-05 | Production of isocyanate-terminated liquid urethane prepolymer with good heat resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57200416A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55123616A (en) * | 1979-03-14 | 1980-09-24 | Takeda Chem Ind Ltd | Preparation of one-pack type urethane resin |
-
1981
- 1981-06-05 JP JP56085677A patent/JPS57200416A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS55123616A (en) * | 1979-03-14 | 1980-09-24 | Takeda Chem Ind Ltd | Preparation of one-pack type urethane resin |
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