JPS568439A - Shock-absorbing foam employing, as material, chip of flexible plastic foam - Google Patents
Shock-absorbing foam employing, as material, chip of flexible plastic foamInfo
- Publication number
- JPS568439A JPS568439A JP8382679A JP8382679A JPS568439A JP S568439 A JPS568439 A JP S568439A JP 8382679 A JP8382679 A JP 8382679A JP 8382679 A JP8382679 A JP 8382679A JP S568439 A JPS568439 A JP S568439A
- Authority
- JP
- Japan
- Prior art keywords
- foam
- shock
- urethane prepolymer
- flexible plastic
- mixt
- 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
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
PURPOSE: To provide a shock-absorbing foam having desired physical properties, by a method wherein a urethane prepolymer, wherein terminal NCOgp.% is extremely low, is mixed with 4,4'-diphenyl-methane diisocyanate just before molding, the mixt. is sprayed on the chips of a flexible plastic foam and the resulting mixt. is compression molded.
CONSTITUTION: Tolylene diisocyanate is reacted with a polyol to produce a urethane prepolymer. The amount of the tolylene diisocyanate used is previously reduced in order to extremely lower the terminal NCOgp.% of the produced urethane prepolymer. The urethane prepolymer is mixed with 4,4'-diphenylmethane diisocyanate in situ just before molding. The mixing ratio is properly varied according to the physical properties required by molded articles. The mixt. is diluted with a solvent and sprayed on the chips of a flexible plastic foam. The resulting mixt. is placed in a mold of a press, and compression molded by steam treatment to produce a shock-absorbing foam.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8382679A JPS568439A (en) | 1979-07-02 | 1979-07-02 | Shock-absorbing foam employing, as material, chip of flexible plastic foam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8382679A JPS568439A (en) | 1979-07-02 | 1979-07-02 | Shock-absorbing foam employing, as material, chip of flexible plastic foam |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS568439A true JPS568439A (en) | 1981-01-28 |
JPS621407B2 JPS621407B2 (en) | 1987-01-13 |
Family
ID=13813485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8382679A Granted JPS568439A (en) | 1979-07-02 | 1979-07-02 | Shock-absorbing foam employing, as material, chip of flexible plastic foam |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS568439A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4884156A (en) * | 1972-02-12 | 1973-11-08 | ||
JPS491479A (en) * | 1972-03-08 | 1974-01-08 | ||
JPS5440590A (en) * | 1977-09-07 | 1979-03-30 | Seiko Epson Corp | Miniature crystal vibrator for contour vibration |
-
1979
- 1979-07-02 JP JP8382679A patent/JPS568439A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4884156A (en) * | 1972-02-12 | 1973-11-08 | ||
JPS491479A (en) * | 1972-03-08 | 1974-01-08 | ||
JPS5440590A (en) * | 1977-09-07 | 1979-03-30 | Seiko Epson Corp | Miniature crystal vibrator for contour vibration |
Also Published As
Publication number | Publication date |
---|---|
JPS621407B2 (en) | 1987-01-13 |
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