Claims
- 1. A sheet backing provided on at least one major surface with a thermoplastic, coherent layer which essentially comprises a segmented copolyester capable of forming a strong, dependable bond to a substrate at a temperature below its melting temperature and without the involvement of volatiles consisting essentially of from about 5 to 75 percent by weight of amorphous ester units and 95 to 25 percent by weight of crystallizable ester units joined through ester linkages, the crystallizable ester units being of the formula: ##STR5## and the amorphous ester units being of the formula: ##STR6## wherein R.sub.1 consists of residues of one or more diacids selected from saturated aliphatic dicarboxylic acids containing from 4 to 10 carbon atoms and aromatic dicarboxylic acids selected from terephthalic acid, isophthalic acid, phthalic acid, 4,4'-benzophenone dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylether dicarboxylic acid, 4,4'-diphenylthioether dicarboxylic acid and 4,4'-diphenylamine dicarboxylic acid, R.sub.2 consists of residues of one or more saturated aliphatic diols containing from 2 to 12 carbon atoms, R.sub.3 is R.sub.1 or R.sub.5, R.sub.4 is R.sub.2 or R.sub.6, R.sub.5 consists of the divalent radicals containing from about 22 to 50 carbon atoms which remain after removal of the carboxyl groups from saturated aliphatic dimer acids and R.sub.6 consists of the divalent radicals remaining after removal of the hydroxyl groups of long chain aliphatic diols having an average molecular weight of 200 to 4000, provided that at least one of R.sub.3 and R.sub.4 in each amorphous ester unit is R.sub.5 or R.sub.6, and provided that when R.sub.1 is aromatic, R.sub.2 contains from 6 to 12 carbon atoms and the amorphous content is 50-75 percent by weight, the said copolyester having a DTA melting temperature of from about 25.degree. to 150.degree. C., an inherent viscosity of at least 0.5 dl/g at 25.degree. C., as measured in 0.3 g/dl solutions of polymer in chloroform at 25.degree. C., an open time of at least about 1/4 minute at 20.degree. C., substantially complete solubility in toluene at 25.degree. C. in the ratio of about 10 percent by weight of copolyester and 90% by weight of solvent, a tensile strength of 100-400 kg/cm.sup.2, an elongation at break of 400-1000 percent, a T-peel adhesion to vinyl of at least 0.9 kg/cm of width and a DTA glass transition temperature, T.sub.g, below -25.degree. C.
- 2. An article according to claim 1 wherein R.sub.4 is R.sub.6.
- 3. A composite tape-like product capable of being wound upon itself in roll form and subsequently unwound without delamination or transfer comprising a flexible sheet backing having adhered thereto over one major surface a thermoplastic, coherent layer which essentially comprises a segmented copolyester capable of forming a strong, dependable bond to a substrate at a temperature below its melting temperature and without the involvement of volatiles consisting essentially of from about 5 to 75 percent by weight of amorphous ester units and 95 to 25 percent by weight of crystallizable ester units joined through ester linkages, the crystallizable ester units being of the formula: ##STR7## and the amorphous ester units being of the formula: ##STR8## wherein R.sub.1 consists of residues of one or more diacids selected from saturated aliphatic dicarboxylic acids containing from 4 to 10 carbon atoms and aromatic dicarboxylic acids selected from terephthalic acid, isophthalic acid, phthalic acid, 4,4'-benzophenone dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylether dicarboxylic acid, 4,4'-diphenylthioether dicarboxylic acid and 4,4'-diphenylamine dicarboxylic acid, R.sub.2 consists of residues of one or more saturated aliphatic diols containing from 2 to 12 carbon atoms, R.sub.3 is R.sub.1 or R.sub.5, R.sub.4 is R.sub.2 or R.sub.6, R.sub.5 consists of the divalent radicals containing from about 22 to 50 carbon atoms which remain after removal of the carboxyl groups from saturated aliphatic dimer acids and R.sub.6 consists of the divalent radicals remaining after removal of the hydroxyl groups of long chain aliphatic diols having an average molecular weight of 200 to 4000, provided that at least one of R.sub.3 and R.sub.4 in each amorphous ester unit is R.sub.5 or R.sub.6, and provided that when R.sub.1 is aromatic, R.sub.2 contains from 6 to 12 carbon atoms and the amorphous content is 50-75 percent by weight, the said copolyester having a DTA melting temperature of from about 25 to 150.degree. C., an inherent viscosity of at least 0.5 dl/g at 25.degree. C., as measured in 0.3 g/dl solutions of polymer in chloroform at 25.degree. C., an open time of at least about 1/4 minute at 20.degree. C., substantially complete solubility in toluene at 25.degree. C. in the ratio of about 10 percent by weight of copolyester and 90% by weight of solvent, a tensile strength of 100-400 kg/cm.sup.2, an elongation at break of 400-1000 percent, a T-peel adhesion to vinyl of at least 0.9 kg/cm of width and a DTA glass transition temperature, T.sub.g, below -25.degree. C.
- 4. A composite tape-like product according to claim 3 wherein R.sub.4 is R.sub.6.
- 5. A composite tape-like product according to claim 3 comprising in combination a self-supporting smooth web and, releasably adhered to one face of said web, an adhesive film whereby when the adhesive is heated above its melting point, the exposed surface thereof may be adhered to a structure to be bonded, the web removed without disrupting the adhesive film, a second structure applied to the newly exposed adhesive surface and temporarily adhered thereby to the first structure and held until the adhesive has hardened to permanently bond said structures together, said adhesive film consisting essentially of a thermoplastic segmented copolyester.
- 6. A composite tape-like product according to claim 5 wherein the adhesive film comprises a copolyester wherein R.sub.1 is the divalent radical of adipic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is the divalent radical of hydrogenated dilinoleic acid, and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycol having a molecular weight of about 2000, the copolyester having from about 53 to 57 percent amorphous units and in which the weight ratio of glycol to diacid content is about 3:7.
- 7. A composite tape-like product according to claim 5 wherein the adhesive film comprises a copolyester wherein R.sub.1 is the divalent radical of terephthalic acid, R.sub.2 is the divalent radical of 1,6-hexanediol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene)glycol having a molecaulr weight of about 2000, the copolyester having 68 percent amorphous units.
- 8. A fiber-reinforced thermoplastic adhesive film comprising in combination a fibrous web provided on at least one major surface with a thermoplastic segmented copolyester capable of forming a strong, dependable bond to a substrate at a temperature below its melting temperature and without the involvement of volatiles consisting essentially of from about 5 to 75 percent by weight of amorphous ester units and 95 to 25 percent by weight of crystallizable ester units joined through ester linkages, the crystallizable ester units being of the formula: ##STR9## and the amorphous ester units being of the formula: ##STR10## wherein R.sub.1 consists of residues of one or more diacids selected from saturated aliphatic dicarboxylic acids containing from 4 to 10 carbon atoms and aromatic dicarboxylic acids selected from terephthalic acid, isophthalic acid, phthalic acid, 4,4'-benzophenone dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylether dicarboxylic acid, 4,4'-diphenylthioether dicarboxylic acid and 4,4'-diphenylamine dicarboxylic acid, R.sub.2 consists of residues of one or more saturated aliphatic diols containing from 2 to 12 carbon atoms, R.sub.3 is R.sub.1 or R.sub.5, R.sub.4 is R.sub.2 or R.sub.6, R.sub.5 consists of the divalent radicals containing from about 22 to 50 carbon atoms which remain after removal of the carboxyl groups from saturated aliphatic dimer acids and R.sub.6 consists of the divalent radicals remaining after removal of the hydroxyl groups of long chain aliphatic diols having an average molecular weight of 200 to 4000, provided that at least one of R.sub.3 and R.sub.4 in each amorphous ester unit is R.sub.5 or R.sub.6, and provided that when R.sub.1 is aromatic, R.sub.2 contains from 6 to 12 carbon atoms and the amorphous content is 50-75 percent by weight, the said copolyester having a DTA melting temperature of from about 25.degree. to 150.degree. C., an inherent viscosity of at least 0.5 dl/g at 25.degree. C., as measured in 0.3 g/dl solutions of polymer in chloroform at 25.degree. C. and an open time of at least about 1/4 minute at 20.degree. C., substantially complete solubility in toluene at 25.degree. C. in the ratio of about 10 percent by weight of copolyester and 90% by weight of solvent, a tensile strength of 100-400 kg/cm.sup.2, an elongation at break of 400-1000 percent, a T-peel adhesion to vinyl of at least 0.9 kg/cm of width and a DTA glass transition temperature, T.sub.g, below -25.degree. C.
- 9. An article according to claim 8 wherein P.sub.4 is R.sub.6.
- 10. A thermoplastic segmented copolyester capable of forming a strong, dependable bond to a substrate at a temperature below its melting temperature and without the involvement of volatiles consisting essentially of from about 5 to 75 percent by weight of amorphous ester units and 95 to 25 percent by weight of crystallizable ester units joined through ester linkages, the crystallizable ester units being of the formula: ##STR11## and the amorphous ester units being of the formula: ##STR12## wherein R.sub.1 consists of residues of one or more diacids selected from saturated aliphatic dicarboxylic acids containing from 4 to 10 carbon atoms and aromatic dicarboxylic acids selected from terephthalic acid, isophthalic acid, phthalic acid, 4,4'-benzophenone dicarboxylic acid, 4,4'-diphenylmethane dicarboxylic acid, 4,4'-diphenylether dicarboxylic acid, 4,4'-diphenylthioether dicarboxylic acid and 4,4'-diphenylamine dicarboxylic acid, R.sub.2 consists of residues of one or more saturated aliphatic diols containing from 2 to 12 carbon atoms, R.sub.3 is R.sub.1 or R.sub.5, R.sub.4 is R.sub.2 or R.sub.6, R.sub.5 consists of the divalent radicals containing from about 22 to 50 carbon atoms which remain after removal of the carboxyl groups from saturated aliphatic dimer acids and R.sub.6 consists of the divalent radicals remaining after removal of the hydroxyl groups of long chain aliphatic diols having an average molecular weight of 200 to 4000, provided that at least one of R.sub.3 and R.sub.4 in each amorphous ester unit is R.sub.5 or R.sub.6, and provided that when R.sub.1 is aromatic, R.sub.2 contains from 6 to 12 carbon atoms and the amorphous content is 50-75 percent by weight, the said copolyester having a DTA melting temperature of from about 25.degree. to 150.degree. C., an inherent viscosity of at least 0.5 dl/g at 25.degree. C., as measured in 0.3 g/dl solutions of polymer in chloroform at 25.degree. C., an open time of at least about 1/4 minute at 20.degree. C., substantially complete solubility in toluene at 25.degree. C. in the ratio of about 10 percent by weight of copolyester and 90% by weight of solvent, a tensile strength of 100-400 kg/cm.sup.2, an elongation at break of 400-1000 percent, a T-peel adhesion to vinyl of at least 0.9 kg/cm of width and a DTA glass transition temperature, T.sub.g, below -25.degree. C.
- 11. A copolyester according to claim 10 having a melting temperature of from about 65.degree. to 150.degree. C.
- 12. A copolyester according to claim 10 in which R.sub.1 is aliphatic.
- 13. A copolyester according to claim 10 in which R.sub.1 is aromatic.
- 14. A copolyester according to claim 13 which contains at least 50 weight percent amorphous units.
- 15. A copolyester according to claim 10 which contains units in which R.sub.1 is aliphatic and other units in which R.sub.1 is aromatic.
- 16. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of adipic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is R.sub.1, and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycols having molecular weights of about 2000, the copolyester varying in amorphous content from about 30 to 70 percent.
- 17. A copolyester according to claim 16 having from about 30 to 33 percent amorphous content.
- 18. A copolyester according to claim 16 having from about 45 to 55 percent amorphous content.
- 19. A copolyester according to claim 16 having from about 66-70 percent amorphous content.
- 20. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of adipic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of polyglycols having molecular weights of about 1000, the copolyester varying in amorphous content from about 25 to 65 percent.
- 21. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of sebacic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of polyglycols having molecular weights of from about 600 to 1300, the copolyester varying in amorphous content from about 10 to 30 percent.
- 22. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of adipic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is the divalent radical of hydrogenated dilinoleic acid and R.sub.4 is R.sub.2, the copolyester varying in amorphous content from about 20 to 65 percent.
- 23. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of adipic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is the divalent radical of hydrogenated dilinoleic acid and R.sub.4 is the divalent radical of poly(oxytetramethylene)glycol having molecular weights of about 2000, the copolyester varying in amorphous content from about 30 to 65 percent.
- 24. A copolyester according to claim 23 having from about 40 to 65 percent amorphous ester units.
- 25. A copolyester according to claim 24 having from about 53 to 57 percent amorphous units and in which the weight ratio of glycol to diacid content is about 3:7.
- 26. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of azelaic acid, R.sub.2 is the divalent radical of 1,5-pentanediol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene)glycol having a molecular weight of about 630, the copolyester having from 10 to 45 percent amorphous content.
- 27. A copolyester according to claim 10 wherein R.sub.1 consists of the divalent radicals of adipic acid and sebacic acid, R.sub.2 is the divalent radical of 1,4-cyclohexanedimethanol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycol having a molecular weight of about 990, the copolymer varying in amorphous content from about 30 to 34 percent.
- 28. A copolyester according to claim 27 wherein the mole ratio of adipic acid to sebacic acid radicals is from about 80/20 to 95/05 and the mole ratio of 1,4-cyclohexanedimethanol to poly(oxytetramethylene) glycol radicals is from about 85/15 to 95/5.
- 29. A copolyester according to claim 10 wherein R.sub.1 is the divalent radical of terephthalic acid, R.sub.2 is the divalent radical of a linear aliphatic diol containing from six to twelve carbon atoms, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycol having a molecular weight of about 2000, the copolyester varying in amorphous content from about 50 to 75 percent.
- 30. A copolyester according to claim 29 wherein R.sub.1 is the divalent radical of terephthalic acid, R.sub.2 is the divalent radical of 1,6-hexanediol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycol having a molecular weight of about 2000, the copolyester varying in amorphous content from about 60 to 75 percent.
- 31. A copolyester according to claim 30 of 68 percent amorphous content.
- 32. A copolyester according to claim 10 wherein R.sub.1 consists of the divalent radicals of sebacic acid and terephthalic acid, R.sub.2 is the divalent radical of 1,4-cyclohexane dimethanol, R.sub.3 is R.sub.1 and R.sub.4 is the divalent radical of poly(oxytetramethylene) glycol having a molecular weight of about 990, the copolyester containing about 16 to 17 percent of amorphous units.
- 33. A copolyester according to claim 10 consisting essentially of about 25 to 75 percent by weight of amorphous ester units and 75 to 25 percent by weight of crystallizable ester units in which R.sub.1 is primarily tetramethylene, and/or phenylene, the copolyester having a DTA melting temperature of from about 65.degree. to 150.degree. C., and a DTA glass transition temperature below 0.degree. C.
- 34. A copolymer according to claim 10 wherein R.sub.4 is R.sub.6.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a continuation-in-part of application Ser. No. 591,935, filed June 30, 1975, now abandoned.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
Date |
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591935 |
Jun 1975 |
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