| 摘要 |
<p>A surface-treatment composition comprises a mixture of a polyepoxide having more than one vic-epoxy group, a flexibilising agent containing at least 10 carbon atoms in the molecule, the weight ratio of polyepoxide to flexibilising agent varying from 10 : 1 to 1 : 10, a curing agent for the polyepoxide which may be the flexibilising agent itself when it possesses curing properties, and at least 40% by weight of the combined mixture of polyepoxide and flexibilising agent of small inert particles having a size of at least 0,074 mm. Polyepoxides specified include 1, 4-bis(2, 3-epoxypropoxy) benzene, 4, 41-bis(2, 3epoxypropoxy) diphenyl ether, 1, 8-bis(2,3-epoxypropoxy) octane and 1, 4-bis(2, 3-epoxypropoxy) cyclohexane, the reaction products of polyhydric phenols or alcohols or novolac resins with halohydrins, epoxy esters of polybasic acids, the polymers or copolymers of ethylenically unsaturated epoxy-containing monomers, vinyl cyclohexene dioxide and epoxidised tetrahydrobenzyl tetrahydrobenzoate. Specified flexibilising agents of which many examples are given include pine oil, pine oil distillate, pine tar, lignite tar, polythiomercaptans, polyamides, chlorinated aromatics, polyesters, monomeric phthalate esters long chain acids and long chain epoxy-containing materials. Many typical epoxide curing agents are specified. Specified fillers are finely divided rocks, sand, finely divided shells, crushed quartz and aluminium oxide. The compositions may also contain coal tar or asphalt. The compositions may be applied to cement, bituminous concrete, wood, steel or asphalt surfaces. The inert particles may be added to the composition before or after it is applied to the surfaces to be treated and curing agent may be applied to the composition after the surface has been coated. In the examples, a polyether made by reacting epichlorohydrin with 2, 2-bis(4-oxyphenol) propane is mixed with pine tar, lignite tar, chlorinated bisphenol, a polyamide a polythio mercaptan, a polyester or a glycidyl ether as a flexibilising agent, diethylene triamine, ethylene, diamine, hexamethylene diamine or tetraethylene pentamine as curing agent, quartz or aluminium oxide as filler and optionally coal, the mixtures being applied to concrete surfaces and cured. Specification 730,670 and U.S.A. Specifications 2,450,940, 2,466,963, 2,640,037 and 2,651,589 are referred to.ALSO:Cement, bituminous concrete, wood, steel or asphalt surfaces are coated with a mixture of a polyepoxide, a flexibilising agent containing at least 10 carbon atoms in the molecule, the weight ratio of polyepoxide to flexibilising agent varying from 10:1 to 1:10, a curing agent for the polyepoxide and at least 40% by weight of the combined mixture of polyepoxide and flexibilising agent of small inert particles having a size of at least 0.074 mm., the mixture being aired in situ. Many typical epoxy resins and curing agents are specified. Specified flexibilising agents include pine oil, pine oil distillate, pine tar, lignite tar, polythiomercaptans, polyamides, chlorinated aromatics, polyesters, monomeric phthalate esters, long chain acids and long chain epoxy containing materials. Specified fillers are finely divided rock, sand, finely divided shells, crushed quartz and aluminium oxide. The compositions may also contain coal tar or asphalt. The inert particles may be added to the mixture before or after it is applied to the surfaces to be treated and the curing agent may also be added to the mixture after it has been applied to the surface. In the examples, compositions of the invention are applied to concrete roadways. Specification 730,670 and U.S.A. Specifications 2,450,940, 2,466,963, 2,640,037 and 2,651,589 are referred to.</p> |
