GB853934A - Improvements in or relating to casts and moulds - Google Patents
Improvements in or relating to casts and mouldsInfo
- Publication number
- GB853934A GB853934A GB1702/59A GB170259A GB853934A GB 853934 A GB853934 A GB 853934A GB 1702/59 A GB1702/59 A GB 1702/59A GB 170259 A GB170259 A GB 170259A GB 853934 A GB853934 A GB 853934A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gms
- mixture
- gas
- methyl methacrylate
- resin
- 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
Links
- 239000000203 mixture Substances 0.000 abstract 7
- 239000000178 monomer Substances 0.000 abstract 5
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 abstract 4
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract 4
- 238000000465 moulding Methods 0.000 abstract 4
- -1 polyethylene Polymers 0.000 abstract 4
- 239000011347 resin Substances 0.000 abstract 4
- 229920005989 resin Polymers 0.000 abstract 4
- 239000007788 liquid Substances 0.000 abstract 3
- 229920002521 macromolecule Polymers 0.000 abstract 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 abstract 3
- 239000004926 polymethyl methacrylate Substances 0.000 abstract 3
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 abstract 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 abstract 2
- 239000004698 Polyethylene Substances 0.000 abstract 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 abstract 2
- 238000000354 decomposition reaction Methods 0.000 abstract 2
- 239000000945 filler Substances 0.000 abstract 2
- 238000006068 polycondensation reaction Methods 0.000 abstract 2
- 229920000573 polyethylene Polymers 0.000 abstract 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract 2
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract 2
- 229920003002 synthetic resin Polymers 0.000 abstract 2
- 239000000057 synthetic resin Substances 0.000 abstract 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 abstract 1
- 239000005995 Aluminium silicate Substances 0.000 abstract 1
- 239000004342 Benzoyl peroxide Substances 0.000 abstract 1
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 abstract 1
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 abstract 1
- 239000004793 Polystyrene Substances 0.000 abstract 1
- BCKXLBQYZLBQEK-KVVVOXFISA-M Sodium oleate Chemical compound [Na+].CCCCCCCC\C=C/CCCCCCCC([O-])=O BCKXLBQYZLBQEK-KVVVOXFISA-M 0.000 abstract 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 235000012211 aluminium silicate Nutrition 0.000 abstract 1
- 235000019400 benzoyl peroxide Nutrition 0.000 abstract 1
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract 1
- 239000001569 carbon dioxide Substances 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 229920001577 copolymer Polymers 0.000 abstract 1
- 239000008187 granular material Substances 0.000 abstract 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 abstract 1
- 150000002825 nitriles Chemical class 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 229920002223 polystyrene Polymers 0.000 abstract 1
- 239000004800 polyvinyl chloride Substances 0.000 abstract 1
- 229920000915 polyvinyl chloride Polymers 0.000 abstract 1
- 239000011369 resultant mixture Substances 0.000 abstract 1
- 229940117958 vinyl acetate Drugs 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
- B29C39/006—Monomers or prepolymers
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/40—Compensating volume change, e.g. retraction
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/02—Polymerisation in bulk
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
Abstract
A synthetic resin moulding mixture is hardened by polymerization, polyaddition or polycondensation in contact with a moulding surface and a gas is released into the resin mass during hardening to prevent shrinkage; the density of the resultant resin being substantially unaffected by the gas. The mixture preferably comprises a polymerizable liquid monomer and a macromolecular compound which is dissolved in the monomer or is soluble or swellable therein. In one example 70 gms. of pearly polymethylmethacrylate, 15 gms. of kaolin, 15 gms. of a copolymer derived from methyl methacrylate and methacrylic acid, 0,3 gms. of sodium bicarbonate and 0,1 gms. of benzoyl peroxide are stirred with 40 gms. of methyl methacrylate, 10 gms. butyl methacrylate, 18 gms. water, 2 gms. of sodium oleate, and 0,25 gms. dimethylaniline, and 120 gms. of polyethylene granules are added to the resultant mixture as a filler. The gas may alternatively be produced by the decomposition of an azo compound in the moulding mixture.ALSO:A synthetic resin mixture is cast in a mould or moulded on a former and a gas is introduced into the resin mass during hardening to prevent shrinkage; the density of the resulting resin being substantially unchanged. The casting composition which is hardened by polymerisation, polyaddition or polycondensation comprises in one instance a polymerisable liquid monomer such as methyl methacrylate or vinylacetate and a macromolecular compound such as polymethylmethacrylate which is dissolved in the monomer or is soluble or swellable therein. In one example a hollow mould is filled with a mixture comprising polymethylmethacrylate, methyl methacrylate, sodium bicarbonate and an acid to liberate carbon dioxide, and fillers &c. such as polyethylene. The polymerisation is completed in twenty minutes and the shrinkage is stated to be only 0-1%. Polyvinyl chloride or polystyrene may be used as macromolecular substance and styrene or a nitrile of acrylic or methacrylic acid may be used as the liquid monomer. The gas may be produced by the decomposition of an azo compound in the moulding mixture.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE853934X | 1956-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB853934A true GB853934A (en) | 1960-11-09 |
Family
ID=6788770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1702/59A Expired GB853934A (en) | 1956-01-24 | 1959-01-16 | Improvements in or relating to casts and moulds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB853934A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534992A1 (en) * | 1982-10-23 | 1984-04-27 | Skf Kugellagerfabriken Gmbh | Shaft mounting for ball bearing assembly |
| FR2534991A1 (en) * | 1982-10-23 | 1984-04-27 | Skf Kugellagerfabriken Gmbh | Precision mouldings for bearings of plastics |
| GB2131341A (en) * | 1982-10-23 | 1984-06-20 | Skf Kugellagerfabriken Gmbh | Plastics components of or for bearings |
| FR2654735A1 (en) * | 1989-11-23 | 1991-05-24 | Centre Nat Rech Scient | Process for the manufacture of articles by photoconversion of a monomeric product into a solid product, and monomeric product compositions for this manufacture |
-
1959
- 1959-01-16 GB GB1702/59A patent/GB853934A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534992A1 (en) * | 1982-10-23 | 1984-04-27 | Skf Kugellagerfabriken Gmbh | Shaft mounting for ball bearing assembly |
| FR2534991A1 (en) * | 1982-10-23 | 1984-04-27 | Skf Kugellagerfabriken Gmbh | Precision mouldings for bearings of plastics |
| GB2131341A (en) * | 1982-10-23 | 1984-06-20 | Skf Kugellagerfabriken Gmbh | Plastics components of or for bearings |
| FR2654735A1 (en) * | 1989-11-23 | 1991-05-24 | Centre Nat Rech Scient | Process for the manufacture of articles by photoconversion of a monomeric product into a solid product, and monomeric product compositions for this manufacture |
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