JPS6469618A - Preparation of prepolymer - Google Patents
Preparation of prepolymerInfo
- Publication number
- JPS6469618A JPS6469618A JP62225356A JP22535687A JPS6469618A JP S6469618 A JPS6469618 A JP S6469618A JP 62225356 A JP62225356 A JP 62225356A JP 22535687 A JP22535687 A JP 22535687A JP S6469618 A JPS6469618 A JP S6469618A
- Authority
- JP
- Japan
- Prior art keywords
- contg
- screw extruder
- isocyanate
- prepolymer
- compd
- 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.)
- Granted
Links
Landscapes
- Polyurethanes Or Polyureas (AREA)
Abstract
PURPOSE:To stably prepare an isocyanate-terminated prepolymer with a good working efficiency without contamination of working environment, by continuously reacting p-phenylene isocyanate with a compd. contg. at least 2 active hydrogen atoms. after injected into a multi-screw extruder using respective metering feeders. CONSTITUTION:Predetermined amts. of p-phenylene diisocyanate (A) and a compd. (B) contg. at least 2 active hydrogen atoms. and having an average MW of 62-6,000, such as a polyether-polyol or a polyester-polyol, are injected, if necessary together with predetermined amts. of a catalyst, an antioxidizing agent, an ultraviolet absorber, a surfactant, a lubricant, etc., (C), into a multi- screw extruder such as an equidirectionally rotary, complete engagement type twin-screw extruder using respective metering feeders to continuously effect a reaction to stably prepare a prepolymer contg. 2-20wt.% isocyanate groups at terminals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225356A JPH0730152B2 (en) | 1987-09-10 | 1987-09-10 | Prepolymer manufacturing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62225356A JPH0730152B2 (en) | 1987-09-10 | 1987-09-10 | Prepolymer manufacturing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6469618A true JPS6469618A (en) | 1989-03-15 |
JPH0730152B2 JPH0730152B2 (en) | 1995-04-05 |
Family
ID=16828059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62225356A Expired - Lifetime JPH0730152B2 (en) | 1987-09-10 | 1987-09-10 | Prepolymer manufacturing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0730152B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5027893A (en) * | 1973-07-10 | 1975-03-22 | ||
JPS5610517A (en) * | 1979-06-27 | 1981-02-03 | Bayer Ag | Manufacture of polyurethane urea |
-
1987
- 1987-09-10 JP JP62225356A patent/JPH0730152B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5027893A (en) * | 1973-07-10 | 1975-03-22 | ||
JPS5610517A (en) * | 1979-06-27 | 1981-02-03 | Bayer Ag | Manufacture of polyurethane urea |
Also Published As
Publication number | Publication date |
---|---|
JPH0730152B2 (en) | 1995-04-05 |
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