发明名称 |
VERFAHREN ZUR WAERMEISOLIERUNG VON WANDHOHLRAEUMEN MIT SCHAUMSTOFF |
摘要 |
1470953 Foamed aqueous urea-formaldehyde resins IMPERIAL CHEMICAL INDUSTRIES Ltd 26 April 1974 [26 Jan 1973] 4127/73 Headings C3C and C3R A foamed aqueous curable urea-formaldehyde resin composition has an acid hardener comprising an organic hydroxy acid, e.g. malic, tartaric and/or citric acid, and optionally an alkyl aryl sulphonic acid, e.g. dodecyl benzene sulphonic acid, and is used to thermally insulate walls by injecting the foam into the cavity of a wall and allowing the resin to be cured by the hardener while in the foamed condition. The foam may be made by blowing an aqueous solution comprising 0À3-2À0% by wt. of the hydroxy acid and 0À5-1À5% by weight of the sulphonic acid through a foaming gun so as to form a foam and spraying an aqueous solution comprising 20-46% by wt. of the resin into the foam as it leaves the gun, the proportions of the 2 solutions being 2 : 1 to 1 : 2 by vol., and allowing the resin to be cured by the acids while in a foamed configuration. |
申请公布号 |
DE2717589(A1) |
申请公布日期 |
1978.11.02 |
申请号 |
DE19772717589 |
申请日期 |
1977.04.20 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LTD. |
发明人 |
JOHN BOYDEN,ROBERT;GREAVES,JAMES;ANTHONY DOWNING,TOM |
分类号 |
C08J9/00;C08J9/30;C08K5/09;E04B1/76 |
主分类号 |
C08J9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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