http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1491011-A
Outgoing Links
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| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a95a92f65c379fd32048d4caec952c87 |
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| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09C3-00 |
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| filingDate | 1974-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1977-11-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1491011-A |
| titleOfInvention | Process of preparing vesiculated polyester granules |
| abstract | 1491011 Pigmented vesiculated polyester resins DULUX AUSTRALIA Ltd 3 Oct 1974 [4 Oct 1973] 42928/74 Headings C3C and C3P Pigmented vesiculated polyester resin granules (i.e. containing a plurality of isolated vesicles surrounded by a continuous wall of polymer) are made by (1) forming a dispersion of pigment in water in the presence of a non-flushing pigment dispersing agent, (2) emulsifying the pigment dispersion into a solution of a carboxylated unsaturated polyester resin (i.e. containing unreacted carboxyl groups) in an ethylenically unsaturated monomer which is water-insoluble and polyester resin-soluble in the presence of a water-soluble polyamine the most basic amine group of which has a dissociation constant in water (pKa) value of 8À5-10À5 at 25 C. and which contains at least three amine groups selected from primary, secondary and tertiary amine groups at a concentration providing 0À3 to 1À4 amine groups per carboxyl group of the carboxylated unsaturated polyester resin and with sufficient mechanical agitation to reduce the diameter of the disperse particles to below one micron, (3) dispersing the emulsion in the form of discrete globules in an aqueous continuous phase comprising a solution in water of 0À01-1% by wt. based on the aqueous continuous phase of a colloidal stabilizer for the dispersion and a water-soluble polymeric thickening agent with continuous mechanical agitation, the intensity of agitation being limited to lie below the threshold at which growth by coalescence of the disperse globules so-formed takes place, (4) initiating in the presence of freeradicals co-reaction of the unsaturated polyester resin and polymerizable monomer with simultaneous control of mechanical agitation to a level below the critical shear rate (as defined) at least until a sample of a curing granule is insoluble in methyl ethyl ketone, and (5) continuing agitation until curing of the granules is essentially completed as determined by a maximum free polymerizable monomer level of 0À5% by weight. In the examples water-in-oil type emulsions were made with vigorous stirring from a dispersion of titanium dioxide, sodium hexametaphosphate and water and diethylene triamine stirred into a solution of a polyester made from phthalic anhydride, fumaric acid or maleic anhydride, and propylene glycol in styrene with optionally methyl methacrylate, and the emulsions were then poured into a mixture of aqueous hydroxyethyl cellulose, aqueous partially hydrolysed polyvinyl acetate and amine hydroperoxide and stirred, stirring was then reduced and an aqueous mixture of diethylene triamine and ferrous sulphate heptahydrate was added, stirring was stopped and after polymerization vesiculated granules were formed. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-8389645-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4974338-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2005073257-A1 |
| priorityDate | 1973-10-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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Total number of triples: 62.