JPS568439A - Shock-absorbing foam employing, as material, chip of flexible plastic foam - Google Patents

Shock-absorbing foam employing, as material, chip of flexible plastic foam

Info

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
Application number
JP8382679A
Other languages
Japanese (ja)
Other versions
JPS621407B2 (en
Inventor
Nobukimi Takahashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wako Chemical Co Ltd
Original Assignee
Wako Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wako Chemical Co Ltd filed Critical Wako Chemical Co Ltd
Priority to JP8382679A priority Critical patent/JPS568439A/en
Publication of JPS568439A publication Critical patent/JPS568439A/en
Publication of JPS621407B2 publication Critical patent/JPS621407B2/ja
Granted legal-status Critical Current

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
JP8382679A 1979-07-02 1979-07-02 Shock-absorbing foam employing, as material, chip of flexible plastic foam Granted JPS568439A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
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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