WO1999050347A1 - Safety glass - Google Patents
Safety glass Download PDFInfo
- Publication number
- WO1999050347A1 WO1999050347A1 PCT/GB1999/000946 GB9900946W WO9950347A1 WO 1999050347 A1 WO1999050347 A1 WO 1999050347A1 GB 9900946 W GB9900946 W GB 9900946W WO 9950347 A1 WO9950347 A1 WO 9950347A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass
- styrene
- thermoplastic
- resin
- polystyrene resin
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/12—Copolymers of styrene with unsaturated nitriles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/16—Homopolymers or copolymers of alkyl-substituted styrenes
Definitions
- the present invention relates to a type of safety glass, particularly safety glass that can be used in storage containers for emergency equipment.
- the glass is used for its transparency and breakable properties, so that the person using the emergency device, such as a fire-axe, can not only observe the presence of the safety article in its retaining box but can also easily break the glass to access the device when required. Glass finds similar applications in emergency door releases, fire alarm activators and many other emergency devices.
- glass may often present other problems to the potential user of a safety device, for example that person may assume that the glass used is safety glass and be surprised at any damage that they inflict upon themselves and any others.
- the potential user may also question as to whether they can access the device without causing any damage to themselves, any such time wasted in the case of an emergency could be crucial and should be avoided.
- perspex which like glass is transparent and being a polymeric material should not produce the same shards as are produced by breaking glass. 3
- perspex and its related plastics is not without its problems. Perspex can be harder to break than glass as it is not as fragile and can still produce sharp fragments that can injure the user m the same way as glass can.
- a material having a tensile stress limit of between 11 and 60 Nm ⁇ f 2 that is or can be made transparent and can be made into sheets/structures just like ordinary glass, but that shatters when broken into fragments that are not capable of damaging human skin or tissue and which is comprised of a mixture of polymeric material and/or a thermoplastic polystyrene resm and/or a thermoplastic vmylaromatic resin.
- the polymeric material is chosen from the group consisting of crystal or impact polystyrene, polycarbonate, acrylic, ABS (acrylonitrile butadiene styrene) , SAN (styrene and acrylic blend) and polyester.
- thermoplastic polystyrene resm is chosen from the group consisting of co-polymers of styrene and alpha methyl styrene, hydrogenated aliphatic polymer and styrene monomer.
- thermoplastic polystyrene resm has a molecular mass of between 500 and 5000.
- the safety glass of the present invention includes other ingredients selected from the list of UV 4 inhibitors, antioxidants, flow modifiers, fire retarding agents, colour pigments and brighteners.
- these ingredients are present in the safety glass of the present invention at between 0.001% and 0.01%.
- the safety glass of the present invention can be etched upon.
- the safety glass of the present invention is composed of crystal or impact polystyrene (0-85%) and thermoplastic polystyrene resin (0-15%) together with 0.001% to 0.01% UN inhibitors, antioxidants, flow modifiers, fire retarding agents, colour pigments and brighteners, which gives a safety glass material which has a stress limit of between 11 and 60 ⁇ mrrf 2 .
- the preferred embodiment of the invention can be used in such applications as emergency equipment enclosures (key boxes, first aid boxes, fire extinguisher enclosures, window hammer enclosures, access panels, door egresses housing manually operated door handles) , break glass fire alarms and emergency kick out panels .
- emergency equipment enclosures key boxes, first aid boxes, fire extinguisher enclosures, window hammer enclosures, access panels, door egresses housing manually operated door handles
- the preferred embodiment of the invention can also be used in other applications such as drinking glasses, bottles and non-emergency windows, preventing injuries from conventional glass in these applications.
- the mechanism which makes safeglass break, and break into safe parts is the low molecular weight of the material.
- Low molecular weight in polymers is a function of the 5 length of the chains.
- the polystyrene resin has a very low molecular weight, too low in fact to be of any use, and also difficult to mould.
- the resulting material is suitable for the present invention and processing it is greatly improved.
- any other clear plastic such as PMMA (acrylic) for example.
- GLASSWARE AND BOTTLES 12000 drink related incidents happen every week. The Home Office are to order prisones to tighten conditions of pub and club licences to use toughened glasses to serve beer. This will reduce the injuries caused when glasses are used as weapons, currently running at 5500 per year. Safeglass glasses and bottles could play an important safety and security role in clubs or live events, they would also be cheaper than glass.
- WINDOWS Windows set in interior doors have to be made of toughened glass if they are fitted below a certain height, this is to save small children or fall victims from injury. However it is very expensive and still produces tiny cubes of sharp glass. Safeglass is safer and less expensive. 6
- the safety glass of the preferred embodiment of the invention is composed of crystal or impact polystyrene and an intermediate weight polystyrene resin (of molecular mass 500 to 5000). This material can be manufactured with a stress limit of between 11 to 60 Nmm "
- the following table shows the variation of the stress limit value of the preferred embodiment of the safety glass of the present invention.
- Example 1 With the inclusion of the thermoplastic resin obtained by polymerisation of various vinylaromatic monomers .
- Example 2 As Example 2 except that the crystal/impact polystyrene is replaced by polycarbonate.
- Example 2 As Example 2 except that the crystal/impact polystyrene is replaced by acrylonitrile.
- Example 6 As Example 2 except that the crystal/impact polystyrene is replaced by ABS (acrylonitrile butadiene styrene) . 9 Example 6
- Example 2 As Example 2 except that the crystal/impact polystyrene is replaced by SAN (styrene and acrylic blend) .
- SAN styrene and acrylic blend
- Example 2 As Example 2 except that the crystal/impact polystyrene is replaced by polyester.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99913448A EP1080150A1 (en) | 1998-03-28 | 1999-03-25 | Safety glass |
AU31570/99A AU3157099A (en) | 1998-03-28 | 1999-03-25 | Safety glass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9806631.9 | 1998-03-28 | ||
GBGB9806631.9A GB9806631D0 (en) | 1998-03-28 | 1998-03-28 | Safetyglass |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999050347A1 true WO1999050347A1 (en) | 1999-10-07 |
Family
ID=10829413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1999/000946 WO1999050347A1 (en) | 1998-03-28 | 1999-03-25 | Safety glass |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1080150A1 (en) |
AU (1) | AU3157099A (en) |
GB (1) | GB9806631D0 (en) |
WO (1) | WO1999050347A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001057135A1 (en) * | 2000-02-04 | 2001-08-09 | Bayer Aktiengesellschaft | Films made from mixtures of polycarbonate and polystyrol |
WO2005026256A1 (en) * | 2003-09-11 | 2005-03-24 | Safeglass (Europe) Limited | Glass like material with improved safety characteristics |
US7368161B2 (en) * | 2000-02-10 | 2008-05-06 | 3M Innovative Properties Company | Color stable pigmented polymeric films |
EP2216409A1 (en) | 2000-04-12 | 2010-08-11 | Human Genome Sciences, Inc. | Albumin fusion proteins |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2239356A1 (en) * | 1972-08-10 | 1974-02-21 | Basf Ag | STYRENE POLYMERIZES WITH IMPROVED FLOWABILITY |
WO1994029383A1 (en) * | 1993-06-04 | 1994-12-22 | The Dow Chemical Company | Improved styrenic resin molding composition and foam |
WO1997015868A1 (en) * | 1995-10-25 | 1997-05-01 | Minnesota Mining And Manufacturing Company | Film composite for electrostatic recording |
-
1998
- 1998-03-28 GB GBGB9806631.9A patent/GB9806631D0/en not_active Ceased
-
1999
- 1999-03-25 AU AU31570/99A patent/AU3157099A/en not_active Abandoned
- 1999-03-25 EP EP99913448A patent/EP1080150A1/en not_active Withdrawn
- 1999-03-25 WO PCT/GB1999/000946 patent/WO1999050347A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2239356A1 (en) * | 1972-08-10 | 1974-02-21 | Basf Ag | STYRENE POLYMERIZES WITH IMPROVED FLOWABILITY |
WO1994029383A1 (en) * | 1993-06-04 | 1994-12-22 | The Dow Chemical Company | Improved styrenic resin molding composition and foam |
WO1997015868A1 (en) * | 1995-10-25 | 1997-05-01 | Minnesota Mining And Manufacturing Company | Film composite for electrostatic recording |
Non-Patent Citations (1)
Title |
---|
ABETZ V ET AL: "THE GLASS TRANSITION OF MIXTURES OF POLYSTYRENE WITH ALKYL -TERMINATED OLIGOSTYRENE - EXPERIMENTAL EVIDENCE FOR MICROPHASE SEPARATION IN A POLYMER BLENS", MACROMOLECULAR CHEMISTRY AND PHYSICS, vol. 196, no. 11, 1 November 1995 (1995-11-01), pages 3845 - 3857, XP000583913, ISSN: 1022-1352 * |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001057135A1 (en) * | 2000-02-04 | 2001-08-09 | Bayer Aktiengesellschaft | Films made from mixtures of polycarbonate and polystyrol |
US7368161B2 (en) * | 2000-02-10 | 2008-05-06 | 3M Innovative Properties Company | Color stable pigmented polymeric films |
EP2216409A1 (en) | 2000-04-12 | 2010-08-11 | Human Genome Sciences, Inc. | Albumin fusion proteins |
WO2005026256A1 (en) * | 2003-09-11 | 2005-03-24 | Safeglass (Europe) Limited | Glass like material with improved safety characteristics |
GB2411898A (en) * | 2003-09-11 | 2005-09-14 | Safeglass | Glass like material with improved safety characteristics |
GB2411898B (en) * | 2003-09-11 | 2008-03-26 | Safeglass | Glass like material with improved safety characteristics |
Also Published As
Publication number | Publication date |
---|---|
EP1080150A1 (en) | 2001-03-07 |
AU3157099A (en) | 1999-10-18 |
GB9806631D0 (en) | 1998-05-27 |
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