GB524063A - Improvements in or relating to artificial spongy or cellular materials derived from polythene - Google Patents

Improvements in or relating to artificial spongy or cellular materials derived from polythene

Info

Publication number
GB524063A
GB524063A GB208939A GB208939A GB524063A GB 524063 A GB524063 A GB 524063A GB 208939 A GB208939 A GB 208939A GB 208939 A GB208939 A GB 208939A GB 524063 A GB524063 A GB 524063A
Authority
GB
United Kingdom
Prior art keywords
polythene
cooling
rubber
gas
heating
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.)
Expired
Application number
GB208939A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB208939A priority Critical patent/GB524063A/en
Publication of GB524063A publication Critical patent/GB524063A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

524,063. Compound sheet-materials. IMPERIAL CHEMICAL INDUSTRIES, Ltd. (Du Pont de Nemours & Co., E. I.). Jan. 20, 1939, No. 2089. Drawings to Specification. [Class 140] [Also in Groups IV and V] A spongy or cellular artificial material comprises polythene or modified polythene permeated with a large number of small uniformly distributed gas cells which may or may not be interconnected. By modified polythene is meant thermoplastic halogenated polythenes, thermoplastic halogenated polythenes from which halogen has been partly or wholly removed and mixtures of polythene with one or more of the following rubber-like materials viz., unvulcanized natural rubber such as crepe rubber, hydrogenated natural rubber, synthetic rubber made by the polymerization or super - polymerization of hydrocarbons such as butadiene containing conjugated double bonds, gutta percha, and those linear substantially saturated hydrocarbon polymers, e.g., polyisobutylene, which are similar in properties to raw or unvulcanized rubber. The material may be prepared by (a) melting the polythene in the presence of a gas under pressure, reducing the pressure and cooling the frothy melt, (b) introducing a gas, or vapour under pressure into a melt of the polythene. e.g., by the use of jets or by stirring and then cooling, (c) heating a mixture of the polythene with a substance adapted to give rise to gas or vapour on heating and cooling the resultant froth, or (d) heating a mixture of the polythene with a solid soluble substance under pressure to form a compact mass, cooling and dissolving out the soluble material. The material may be used in the form of sheets backed with flexible fabric, paper, metal foil or wire mesh to form shock or vibration absorbing cushions, polishing cloths or anti - skid pads. Specifications 471,590, 481,515, 492,322 and 514,687,. [all in Group IV], are referred to.
GB208939A 1939-01-20 1939-01-20 Improvements in or relating to artificial spongy or cellular materials derived from polythene Expired GB524063A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB208939A GB524063A (en) 1939-01-20 1939-01-20 Improvements in or relating to artificial spongy or cellular materials derived from polythene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB208939A GB524063A (en) 1939-01-20 1939-01-20 Improvements in or relating to artificial spongy or cellular materials derived from polythene

Publications (1)

Publication Number Publication Date
GB524063A true GB524063A (en) 1940-07-29

Family

ID=9733384

Family Applications (1)

Application Number Title Priority Date Filing Date
GB208939A Expired GB524063A (en) 1939-01-20 1939-01-20 Improvements in or relating to artificial spongy or cellular materials derived from polythene

Country Status (1)

Country Link
GB (1) GB524063A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069170A (en) * 1959-02-04 1962-12-18 Dow Chemical Co Practice ball

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3069170A (en) * 1959-02-04 1962-12-18 Dow Chemical Co Practice ball

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