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US 5,151,230 AGranted
Process for production of products formed of polymer bonded and granulated particles
AssigneeDinoflex Manufacturing Ltd.
InventorDirk H. Damberg
Life of this patent
Estimating the term…
Abstract
A process formulation and apparatus for producing formed parts of polymeric binders and elastic or inflexible particularized ingredients. A formulation for forming a formed material upon the application of heat and pressure comprising a mixture of: (a) 75 to 95.5 wt. % of elastic or inelastic particles; (b) 2.5 to 25.0 wt. % of a polymer binder; (c) 0 to 20.0 wt. % of a coloring pigment; and (d) 0.1 to 0.5 wt. % of a catalyst.
Claims10
A process of forming a compressed cured material from a mixture comprising:
- (a) about 75 to 95.5 weight % of elastic or inelastic particles of a substance selected from the group consisting of granulated rubber, polymerized ethylenepropylenediene, neoprene, granulated cork, granulated polyvinylchloride and granulated sawdust, wherein the particles are of a size range of about 0.1 to 8.0 mm;
- (b) about 2.5 to 25.0 weight % of a polymer binder selected from the group consisting of a one or two component polyurethane system and a one or two component poly-acrylate resin system;
- (c) about 0 to 20.0 weight % of a colouring pigment selected from the group consisting of iron oxide and chrome oxide;
- and
- (d) about 0.1 to 0.5 weight % of water as a catalyst, the proportions of (a), (b), (c) and (d) adding up to 100% weight, which process comprises placing the mixture in a mold and applying heat in a form of steam at a temperature between 110.degree. C. and 140.degree. C. and at a pressure between about 3 to 8 bars and at a rate between 40 to 90 kg per hour to the mixture, and applying pressure of between about 25 to 160 bars to the mixture to compress the mixture and effect a cure of the mixture and thus form the compressed cured material.
2 more elements
A process of forming a compressed cured product from a mixture comprising:
- (a) between about 75 to 95.5 weight % of granulated rubber of a size range of about 0.1 to 8.0 mm;
- (b) between about 2.5 and 25.0 weight % of a one shot polyurethane binder formed from a mixture of methyl diisocyanate and a polyol of a chain length of about 2,000 molecular weight;
- (c) between about 0 to about 20.0 weight % of iron oxide;
- and
- (d) about 0.1 to 0.5 weight % of a catalyst, to add up to 100 weight %;
- which process comprises,
- (e) placing the mixture in a mold;
- (f) applying steam at a temperature of about 140.degree. C. and a pressure of about 4.3 bars to the mold at a rate of 40 to 90 kg per hour, and maintaining the temperature of the steam at the mold at about 110.degree. C.;
- (g) applying a pressure to the mixture of about 100 bars to compress the mixture to a thickness of about 50% of its original height;
- and
- (h) removing the compressed cured mixture as the product from the mold after steam and pressure have been applied to the mixture for about 4 minutes.
8 more elements
Dependencies are inferred from the claim text.