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US 4,057,658 AGranted
Method of impregnating wood with plastics
OwnerGunnar Arthur Sigvard Sjoo, Jan Anders Sundlininventors
Life of this patent
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Abstract
A method of increasing the strength of wood through impregnation thereof with a liquid containing a polymerizable monomer and/or oligomer and a setting agent, said agent being inactive at room temperature levels but activated when heated or exposed to radiation. The wood is impregnated with said liquid and thereafter heated in an oven or exposed to radiation in a radiation chamber.
Claims9
In a method of increasing the strength of wood through impregnation thereof with a polymerizable liquid, comprising
- positioning the wood in a container,
- evacuating said container to remove moisture and air from the wood, and
- subsequently impregnating the wood under pressure with a polymerizable liquid and a setting agent,
- the improvement in which the setting agent is dormant at temperatures up to 30.degree. C. but is rapidly activated at higher temperatures and comprises at least one of the following substances,
- 2,2-bis(t-butyl peroxy) butane,
- 2,5-dimethyl-2,5-di(t-butyl peroxy) hexane,
- 2,5-dimethyl-2,5-di(t-butyl peroxy) hexyne-3,
- n-butyl-4,4-bis(t-butyl peroxy) valerate,
- 1,1-bis(t-butyl peroxy)-3,3,5-trimethyl cyclohexane,
- and after the impregnating, polymerization of the polymerizable liquid in the wood impregnated therewith is conducted in an oven at temperatures in the range of 60.degree. to 150.degree. C.
7 more elements
In a method of increasing the strength of wood through impregnation thereof with a polymerizable liquid, comprising
- positioning the wood in a container,
- evacuating said container to remove moisture and air from the wood, and
- subsequently impregnating the wood under pressure with a polymerizable liquid and a setting agent,
- the improvement in which the setting agent is dormant at temperatures up to 30.degree. C. but is rapidly activated by electromagnetic radiation and comprises at least one of the following substances,
- 2,2-bis(t-butyl peroxy) butane
- 2,5-dimethyl-2,5-di(t-butyl peroxy) hexane
- 2,5-dimethyl-2,5-di(t-butyl peroxy) hexyne-3
- n-butyl-4,4-bis(t-butyl peroxy) valerate
- 1. 1-bis(t-butyl peroxy)-3,3,5-trimethyl cyclohexane,
- and after the impregnating, polymerization of the polymerizable liquid in the wood impregnated therewith is conducted by exposing the impregnated wood to radiation in a radiation chamber at room temperatures.
7 more elements
Dependencies are inferred from the claim text.