Claims
- 1. A process for the production of laminates, wherein sheets of silicate glass and/or transparent glass-like plastics are coated and/or bonded together with a transparent film of 0.1 to 5 mm. in thickness formed from a polyurethane polyurea with a predominantly linear molecular structure exclusively containing aliphatically or cycloaliphatically bound urethane and urea segments and having a shear modulus G' (DIN 53 445) which amounts to between 2 and 140 N/mm.sup.2 at 20.degree. C. and does not fall below a value of 1 N/mm.sup.2 at 60.degree. C., characterized by
- (a) a content of urea groups --NH--CO--NH-- amounting to between 1 and 20% by weight and
- (b) a content of lateral carboxyl groups --COOH directly attached to the main chain of the molecule amounting to between 0.001 and 10% by weight.
- 2. A process for the production of laminates of glass or glass like transparent plastics with polyurethane polyurea comprising subjecting a transparent film of 0.1 to 5 mm in thickness formed from a polyurethane polyurea comprising the reaction product of
- (a) dihydroxy compounds having molecular weights between about 300 and 6,000 selected from the group consisting of polyesters and polyethers,
- (b) dihydroxy carboxylic acids corresponding to the formula ##STR4## wherein R represents H, or a C.sub.1 to C.sub.4 alkyl radical, (c) optionally aliphatic or cycloaliphatic diols having molecular weights of between about 62 and 300,
- (d) diisocyanates having exclusively aliphatically and cycloaliphatically bound isocyanate groups, and
- (e) organic diamines containing aliphatically and cycloaliphatically bound primary amino groups and having molecular weights between about 60 and 3,000, wherein the equivalent ratio of d:(a+b+c) is between about 1.1:1 and 4:1, the equivalent ratio of e:(a+b+c) is between about 0.1:1 and 3:1, the molar ratio of a:b is between about 1:0.01 and 1:12, and the molar ratio of a:c is between about 1:0 and 1:10, said polyurethane polyurea having
- (1) a molecular weight greater than about 10,000,
- (2) a urea group content of between about 1 and 20 wt. %, and
- (3) a content of lateral carboxyl groups directly attached to the main chain of the molecule of between about 0.001 and 10 wt. %
- and at least one immediately adjacent sheet of a glass or glass like plastic to heat and pressure.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2644434 |
Oct 1976 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 833,311 filed Sept. 14, 1977, U.S. Pat. No. 4,139,674.
US Referenced Citations (32)
Foreign Referenced Citations (6)
Number |
Date |
Country |
967436 |
May 1975 |
CAX |
985152 |
Mar 1976 |
CAX |
1219630 |
Jan 1971 |
GBX |
1305624 |
Feb 1973 |
GBX |
1399124 |
Jun 1975 |
GBX |
1401986 |
Aug 1975 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
833311 |
Sep 1977 |
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