GB1194492A - Filter Material - Google Patents

Filter Material

Info

Publication number
GB1194492A
GB1194492A GB2120668A GB2120668A GB1194492A GB 1194492 A GB1194492 A GB 1194492A GB 2120668 A GB2120668 A GB 2120668A GB 2120668 A GB2120668 A GB 2120668A GB 1194492 A GB1194492 A GB 1194492A
Authority
GB
United Kingdom
Prior art keywords
filter material
polyurethane
foam
rigid
rigid polyurethane
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
GB2120668A
Inventor
Robert Louis Strickman
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.)
STRICKMAN FOUNDATION ROBERT L
Original Assignee
STRICKMAN FOUNDATION ROBERT L
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 STRICKMAN FOUNDATION ROBERT L filed Critical STRICKMAN FOUNDATION ROBERT L
Publication of GB1194492A publication Critical patent/GB1194492A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24D—CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES FOR CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES
    • A24D3/00—Tobacco smoke filters, e.g. filter-tips, filtering inserts; Filters specially adapted for simulated smoking devices; Mouthpieces for cigars or cigarettes
    • A24D3/06—Use of materials for tobacco smoke filters
    • A24D3/08—Use of materials for tobacco smoke filters of organic materials as carrier or major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/04—Organic material, e.g. cellulose, cotton
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1638—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate
    • B01D39/1653—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being particulate of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
    • B01D39/1669—Cellular material
    • B01D39/1676—Cellular material of synthetic origin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

1,194,492. Tobacco smoke filters. ROBERT L. STRICKMAN FOUNDATION Inc. 3 May, 1968, No. 21206/68. Heading A2C. [Also in Division C3] A filter for aerosols (particularly tobacco smoke) containing as filtering material rigid polyurethane particles essentially devoid of celullar structure. The filter material may be produced by reacting a polyisocyanate and a polyol in amounts sufficient to provide a ratio of reactive isocyanate groups to organic hydroxyl groups of between 0.75 and 1.25 to produce a rigid polyurethane in the presence of sufficient blowing agent that the rigid polyurethane shall be produced as a foam having a density of less than 3 pounds per cubic foot, granulating the resulting rigid foam to produce particles essentially devoid of cellular structure, perferably having a particle size of less than 750 microns, subjecting the granules to a treatment with hot water or steam, and drying the product. It is preferred to employ water-soluble acid salts of metals of groups VA and VIA of the Periodic Table, e.g. alkane tungstates, molybdates, vanadates and chromates and alkyl silicates in the preparation of the intermediate polyurethane foam. The particulate polyurethane filter material is desirably mixed with inorganic additives such as aluminium hydroxide, magnesium trisilicate and carbonates, silicates or hydroxides of alkaline earth metals. These additives may have the same particle size as for the polyurethane particles. Mixtures of aluminium hydroxide and magnesium trisilicate are preferably employed as a 1 : 1 mixture by weight in amounts of between 3 and 15% by weight of the filter material. The dried granules of filter material with or without inorganic additives may be filled into the open tubular end of a cigarette and are prevented from falling out by a small plug of cotton or other suitable material.
GB2120668A 1968-04-11 1968-05-03 Filter Material Expired GB1194492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72156368A 1968-04-11 1968-04-11

Publications (1)

Publication Number Publication Date
GB1194492A true GB1194492A (en) 1970-06-10

Family

ID=24898460

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2120668A Expired GB1194492A (en) 1968-04-11 1968-05-03 Filter Material

Country Status (6)

Country Link
JP (1) JPS5010959A (en)
BE (1) BE714749A (en)
DE (1) DE1769321B2 (en)
GB (1) GB1194492A (en)
LU (1) LU56037A1 (en)
NL (1) NL6806446A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001679A1 (en) * 1977-09-15 1979-05-02 Max Klein Particulate polyurethane polymers in the form of micro-bits, a process for their preparation and aqueous slurries containing them
US4304873A (en) 1977-09-15 1981-12-08 Max Klein Preparation of expanded flexible polyurethane foam micro-bits
CN113234206A (en) * 2021-04-21 2021-08-10 深圳市真味生物科技有限公司 Electronic cigarette atomization core material and preparation method thereof

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110087497B (en) * 2016-12-29 2023-03-17 菲利普莫里斯生产公司 Smoking article filter with amorphous magnesium carbonate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001679A1 (en) * 1977-09-15 1979-05-02 Max Klein Particulate polyurethane polymers in the form of micro-bits, a process for their preparation and aqueous slurries containing them
US4304873A (en) 1977-09-15 1981-12-08 Max Klein Preparation of expanded flexible polyurethane foam micro-bits
CN113234206A (en) * 2021-04-21 2021-08-10 深圳市真味生物科技有限公司 Electronic cigarette atomization core material and preparation method thereof
CN113234206B (en) * 2021-04-21 2022-08-16 深圳市真味生物科技有限公司 Electronic cigarette atomization core material and preparation method thereof

Also Published As

Publication number Publication date
BE714749A (en) 1968-11-07
NL6806446A (en) 1969-11-11
LU56037A1 (en) 1969-03-20
DE1769321A1 (en) 1970-11-05
JPS5010959A (en) 1975-02-04
DE1769321B2 (en) 1975-11-06

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees